Active sectional yarn feeding spandex frame

Abstract

The utility model relates to the technical field of weaving machine accessories, and discloses an active segmented yarn feeding spandex 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, a stator is fixed to each hollow core shaft, a rotor is arranged on the outer side of each stator in a sleeved mode, and the rotor is fixed to the machine body. A yarn feeding roller is fixed to the outer side of the rotor, and the two ends of the yarn feeding roller are rotationally connected with the hollow mandrel through yarn feeding roller bearings. A roller is arranged on the outer side of the yarn feeding roller in a sleeving mode, a spandex yarn drum is arranged on the outer side of the roller, and the spandex yarn drum is stabilized on the roller through an elastic piece arranged on the roller or a rubber ring arranged on the roller in a sleeving mode. The yarn feeding roller is provided with an independent motor driving system, the speed and tension of each spandex yarn drum arranged on the roller in a sleeving mode 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 an active 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 an active 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: an active segmented spandex yarn feeding frame, comprising a machine body, with drive shafts respectively arranged on both sides of the machine body. Each drive shaft includes a hollow mandrel mounted on the machine body, a stator 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. The two ends of the yarn feeding roller are rotatably connected to the hollow mandrel through yarn feeding roller bearings. A roller is sleeved on the outside of the yarn feeding roller, and a spandex yarn bobbin is arranged on the outside of the roller. The spandex yarn bobbin is stabilized on the roller by a spring sheet on the roller or by a rubber ring sleeved on the roller.

[0005] Furthermore, the roller includes a cylinder and a disc disposed at one end of the cylinder. A limit ring is disposed at the other end of the cylinder. Multiple movable holes are spaced apart on the cylinder. A spring is fixedly connected to one end of each movable hole near the disc, and the other end of the spring is a free end.

[0006] Furthermore, the spring includes an inclined section near the side of the disc and a horizontal section connected to the end of the inclined section. The inclined end is inclined outward from the end fixed by the spring towards the free end. The cross-sections of the inclined section and the horizontal section are arc-shaped and coaxial with the cylinder.

[0007] Furthermore, two sliding grooves are symmetrically arranged on both sides of the outer end of the roller. The two sliding grooves are located on the axis of symmetry of the disc. A limit slider is slidably connected in the sliding groove. A limit stop is inserted into the inner end of the sliding groove. A spring is provided between the limit stop and the limit slider.

[0008] Furthermore, the sliding groove includes a main sliding groove, the outer side of which is connected to a T-shaped groove, the T-shaped groove penetrating the sidewall of the roller, and stop slots are respectively provided on both inner sides of the main sliding groove. The limiting slider includes a slider body, the outer side of which is connected to a T-shaped block, and a push-pull block is connected to the top of the slider body and the T-shaped block. The limiting stop block is inserted into the stop slot. The slider body is disposed in the main sliding groove, the T-shaped block is slidably connected to the T-shaped groove, the push-pull block is located on the outer side of the outer surface of the disc, and a spring limiting groove is provided on the inner sidewall of the slider body. One end of the spring is disposed in the spring limiting groove, and the other end abuts against the limiting stop block.

[0009] Furthermore, the roller includes a cylinder and a disc disposed at one end of the cylinder, a limit ring is disposed at the other end of the cylinder, and a rubber ring is sleeved on the outer side of the cylinder, the outer surface of the rubber ring being provided with anti-slip ripples.

[0010] Furthermore, a circuit board is provided inside the machine body. The circuit board includes a power supply circuit, two 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.

[0011] 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.

[0012] 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 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.

[0013] Furthermore, the motor control circuit includes a sensor data interface circuit, which is connected to the main chip U2; a T-shaped fixing frame is provided at the bottom of the machine body, and two tension measuring displays are respectively provided on both sides of the fixing frame, which are electrically connected to the sensor data interface circuit. Beneficial effects

[0014] Compared to existing technologies, this utility model has at least the following advantages: 1. The two spandex yarn bobbins on the spandex frame of this utility model are independently controlled and conveyed by corresponding motors, allowing for flexible adjustment of the yarn bobbin speed or tension according to production needs. 2. The spandex frame of this utility model has a compact structure and occupies little space. Compared to 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. 3. This utility model achieves stable installation of the spandex yarn bobbins through the use of spring plates on the rollers in conjunction with sliding grooves and limiting sliders. Another stable installation method for the spandex yarn bobbins is to utilize rubber rings fitted on the rollers to achieve stable installation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the left side view of the present invention.

[0017] Figure 3 This utility model Figure 2 A schematic diagram of the structure of section AA.

[0018] Figure 4 This is a schematic diagram of one embodiment of the roller and its structure according to the present invention.

[0019] Figure 5 This utility model Figure 4 The diagram shows the structure of the roller.

[0020] Figure 6 This utility model Figure 4 The diagram shows the structure of the limiting block.

[0021] Figure 7 This utility model Figure 4 A schematic diagram of the limit slider.

[0022] Figure 8 This is a schematic diagram of another embodiment of the roller of this utility model.

[0023] Figure 9 This is a circuit block diagram of the present invention.

[0024] Figure 10 This is a circuit diagram of the power supply circuit of this utility model.

[0025] Figure 11 This is a schematic diagram of the control circuit for motor number one in an embodiment of this utility model.

[0026] Figure 12 This is a schematic diagram of the control circuit for motor number two in an embodiment of this utility model.

[0027] Figure 13 This is a circuit diagram of the communication circuit of this utility model.

[0028] Reference numerals: 1-Machine body; 2-Spandex yarn bobbin; 3-Roller; 30-Opening; 31-Disc; 32-Bobbin body; 33-Limiting ring; 34-Moving hole; 35-Spring; 4-Drive shaft; 40-Stator; 41-Spacer; 42-Hollow mandrel; 43-Rotor; 44-Yarn feed roller bearing; 45-Yarn feed roller; 5-Limiting slider; 50-Slider body; 51-T-block; 52-Push-pull block; 53-Protrusion; 54-Spring limiting groove; 6-Step bolt; 7-Fixing frame; 8-Tension indicator; 9-Sliding groove; 90-Main sliding groove; 91-Stop slot; 92-T-groove; 10-Limiting stop; 11-Rubber ring; 110-Anti-slip texture. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] See Figures 1-13 This embodiment provides an active segmented spandex yarn feeding frame, including a machine body 1. Drive shafts 4 are respectively arranged on both sides of the machine body 1. Each drive shaft 4 includes a hollow mandrel 42, which is fixedly installed in a bearing seat 12 within the machine body 1. A stator 40 is fixed to the hollow mandrel 42, and a rotor 43 is sleeved on the outside of the stator 40. A yarn feeding roller 44 is fixed on the outside of the rotor. The two ends of the yarn feeding roller 44 are rotatably connected to the hollow mandrel 42 via yarn feeding roller bearings 44. A roller 3 is sleeved on the outside of the yarn feeding roller 44, and a spandex yarn bobbin 2 is arranged on the outside of the roller 3.

[0033] Each pair of stators 40 and rotors 44 forms a motor. In this embodiment, there are two motors, namely the first motor and the second motor.

[0034] The roller 3 includes a cylindrical body 32 and a disc 31 disposed at one end of the cylindrical body 32. A limit ring 33 is disposed at the other end of the cylindrical body 32. The outer surface of the disc 31 is trumpet-shaped to facilitate the installation of the spandex yarn bobbin 2 on the roller 3. Specifically, the diameter of the outer end face of the disc 31 is smaller than the diameter of the inner end face. The inner end face is connected to the cylindrical body, and its diameter is the same as that of the cylindrical body 32. The cylindrical body 32 is provided with a plurality of elongated movable holes 34 at intervals. A spring piece 35 is fixedly connected to one end of each movable hole 34 near the disc, and the other end of the spring piece is a free end. In this embodiment, the spring piece 35 includes an inclined section 350 near the side of the disc 31 and a horizontal section 351 connected to the end of the inclined section 350. The inclined end 350 is inclined outward from the fixed end of the spring piece to the free end. The longitudinal cross-section of the inclined section 350 and the horizontal section 351 is an arc-shaped structure and is coaxial with the cylinder 32. The horizontal section 351 of the spring piece is located outside the movable hole. The spandex yarn bobbin 2 is inserted into the outer side of the roller 3 from one end of the base. During insertion, the spandex yarn bobbin 2 first contacts the inclined section 350. The inclination angle of the inclined section 35 guides the spandex yarn bobbin 2 to smoothly fit onto the roller. The spring piece 35 moves towards the movable hole under the pressure of the spandex yarn bobbin 2. After the spandex yarn bobbin 2 is fully fitted, the inclined section 350 partially contacts the spandex yarn bobbin, and the outer surface of the horizontal section 351 of the spring piece 35 tightly abuts against the inner wall of the spandex yarn bobbin 2, forming a surface contact. This supports and positions the spandex yarn bobbin 2, ensuring its stability on the roller and preventing it from slipping off the roller 3. To remove the spandex yarn bobbin 2, simply pull it outwards.

[0035] Two sliding grooves 9 are symmetrically arranged on both sides of the outer end of the roller 3. The two sliding grooves 9 are located on the axis of symmetry of the disc. A limiting slider 5 is slidably connected in the sliding groove 9. A limiting block 11 is inserted into the inner end of the sliding groove 9. A spring is provided between the limiting block 11 and the limiting slider 5. Specifically, the sliding groove 9 includes a main sliding groove 90. A T-shaped groove 92 is connected to the outer side of the main sliding groove 90. The T-shaped groove 92 penetrates the side wall of the roller 3. A stop slot 91 is provided on both sides of the inner side of the main sliding groove 90. The limiting slider 5 includes a slider body 50. A T-shaped block 51 is connected to the outer side of the slider body 50. A push-pull block 52 is connected to the top of the slider body 50 and the T-shaped block 51. The surface of the push-pull block 52 is provided with protrusions 53 and anti-slip textures. The limiting block 10 is inserted into the blocking slot 91, the slider body 50 is set in the main slide groove 90, the T-shaped block 51 is adapted to slide in the T-shaped groove 92, the push-pull block 52 is located on the outer side of the outer surface of the disc 31, and the inner side wall of the slider body 50 is provided with a spring limiting groove 54, one end of the spring is set in the spring limiting groove 54, and the other end abuts against the limiting block 10. When the spandex yarn bobbin is to be inserted, the push-pull block 52 is pushed towards the center of the roller, so that the outer end of the T-shaped block 51 retracts into the T-shaped groove, and the spandex yarn bobbin can be smoothly inserted into the roller. When the spandex yarn bobbin is placed on the roller, the push-pull block 52 is released, and the T-shaped block 51 extends out of the T-shaped groove 92 under the action of the spring and is locked on the outer side of the spandex yarn bobbin 2, limiting the outer end of the spandex yarn bobbin 2, while the inner end is limited by the limiting ring 33, thereby limiting the spandex yarn bobbin 2 and preventing it from sliding outward due to inertia, vibration and other factors, further improving the stability of the spandex yarn bobbin 2 on the roller 3, and improving the reliability and stability of the spandex frame operation.

[0036] In other embodiments, the roller 3 includes a cylindrical body 32 and a disc 31 disposed at one end of the cylindrical body 32. The outer surface of the disc 31 is trumpet-shaped to facilitate the installation of the spandex yarn bobbin 2 on the roller 3. Specifically, the diameter of the outer end face of the disc 31 is smaller than the diameter of the inner end face. The inner end face is connected to the cylindrical body, and its inner end face diameter is consistent with the diameter of the cylindrical body 32. A limit ring 33 is provided at the other end of the cylindrical body 32, and a rubber ring 11 is sleeved on the outer side of the cylindrical body 32. The outer surface of the rubber ring 11 is provided with anti-slip ripples 11. The spandex yarn bobbin 2 is sleeved on the roller 3 from one side of the outer end of the roller 3. The spandex yarn bobbin 2 and the roller 3 are tightly connected by the rubber ring 11. Since the rubber ring 11 is elastic, it can fit well against the inner wall of the spandex yarn bobbin 2, effectively preventing the spandex yarn bobbin 2 from sliding on the roller 3. The anti-slip ripples 110 further increase the friction between the rubber ring 11 and the spandex yarn bobbin 2, making the spandex yarn bobbin 2 more stably fixed on the roller.

[0037] In this utility model technical solution, a T-shaped fixing frame is provided at the bottom of the machine body, and two tension measuring displays 8 are respectively provided on both sides of the fixing frame, corresponding to two spandex yarn bobbins 2. The yarn conveyed by the spandex yarn bobbins 2 passes through the tension measuring displays 8 to detect the tension of the spandex yarn conveyed.

[0038] The machine body contains a circuit board, which includes a power supply circuit, two motor control circuits, and a communication circuit. The two motor control circuits are a first motor control circuit and a second 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 circuit, and the motor control circuit is electrically connected to the stator. The first motor control circuit is connected to the first motor, and the second motor control circuit is connected to the second motor.

[0039] 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.

[0040] 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, and the signal output terminals of the three motor drive chip circuits are connected to the three phase lines of the stator. The three motor drive chip circuits are a first motor drive chip circuit, a second motor drive chip circuit, and a third motor drive chip circuit. 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.

[0041] 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 second motor drive chip circuit, and the third motor drive chip circuit. Figure 12 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.

[0042] 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, 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 pin and the GND pin. The HO and LO pins of the motor drive chip U3 are connected to the gate of the high-side MOSFET Q1 and the gate of the low-side MOSFET Q2 through a first resistor R2 and a second resistor R6, respectively. A first diode D7 is also connected in reverse between the HO pin of the motor drive chip U3 and the gate of the high-side MOSFET Q1, and a second diode D8 is also connected in reverse between the LO pin of the motor drive 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, the source of the high-side MOSFET Q1 is connected to the output terminal OUTU1, the output terminal OUTU1 is connected to the VS pin of the motor drive 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. The VCC and VB pins of the motor driver chip U3 are connected to a third diode D6, and a capacitor C14 is also 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 on and the low-side MOSFET Q2 is off, the output terminal OUTU1 outputs a high level of 155V. When the high-side MOSFET Q1 is off and the low-side MOSFET Q2 is on, the output terminal OUTU1 outputs a low level of 0V.

[0043] 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.

[0044] 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.

[0045] The first motor control circuit also includes a sensor data interface circuit, which is connected to the main chip U2. The sensor data interface circuit includes a transceiver chip U21, model MAX485. The RO and DI pins of the transceiver chip U21 are connected to pin 1 of the main chip U2, and its VCC pin is connected to the power supply VCC and grounded through capacitor C18. Pins B and A of the transceiver chip U21 are connected to pins 2 and 3 of the sensor data interface P5, respectively, with a resistor R63 connected between pins B and A. Pin 1 of the sensor data interface P5 is connected to the power supply VCC, and pin 4 is grounded. The GND pin of the transceiver chip U21 is grounded. Data from the tension display 8 is processed through the sensor data interface circuit, including level conversion and differential transmission, and then transmitted to the main chip U2. The main chip U2 receives the tension data and determines whether the tension is normal. If abnormal, the main chip outputs a signal to adjust the motor speed, thereby adjusting the tension.

[0046] The second motor control circuit has the same structure as the first motor control circuit. The connection relationship and function of each component are the same as those of the first motor control circuit. Only the component numbers are different, which will not be described in detail here.

[0047] 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 P3 via fuse F2, the CANL pin is connected to pin 2 of the CAN communication interface P3 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, with the other end 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.

[0048] 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 two main chips, U2 and U7. The communication circuit uses address-based time-division control to send commands to the first motor control circuit and the second circuit control circuit, including start / stop signals and speed signals.

[0049] In this invention, the stator 40 is connected to three-phase electricity, generating a rotating magnetic field. Under the influence of this rotating magnetic field, the rotor 43 generates an induced current, which in turn induces its rotation due to electromagnetic force. The rotation of the rotor 43 causes the yarn feeding roller 45 to rotate. Two motors, each consisting of a stator and a rotor, drive the two yarn feeding rollers to rotate, thus conveying the spandex yarn bobbin mounted on the outer roller of the yarn feeding roller. Each motor can be independently controlled, including speed and start / stop, allowing for simultaneous or individual operation.

[0050] When a certain line is not in use, the knitting equipment sends a stop signal, and the corresponding motor stops working and stops feeding yarn to prevent excessive yarn from being fed, which could cause false alarms on the edge thread frame or yarn tangling due to excessive yarn.

[0051] When the yarn is needed, the knitting equipment can send a start signal in advance to start the motor of the corresponding yarn feeding roller in advance to avoid the yarn being taut. In addition, the motor speed can be adjusted according to the current speed of the knitting equipment to ensure timely or excessive yarn feeding.

[0052] The two spandex yarn bobbins on the spandex frame of 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 frame 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.

[0053] 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. An active segmented yarn feeding spandex holder, characterized by: The device includes a machine body, with drive shafts on both sides of the machine body. Each drive shaft includes a hollow mandrel mounted on the machine body. A stator is 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, and both ends of the yarn feeding roller are rotatably connected to the hollow mandrel through yarn feeding roller bearings. A roller is sleeved on the outside of the yarn feeding roller, and a spandex yarn bobbin is disposed on the outside of the roller. The spandex yarn bobbin is stabilized on the roller by a spring sheet on the roller or by a rubber ring sleeved on the roller.

2. The active segmented spandex feeding frame according to claim 1, characterized in that: The roller includes a cylinder and a disc disposed at one end of the cylinder. A limit ring is disposed at the other end of the cylinder. Multiple movable holes are spaced apart on the cylinder. A spring is fixedly connected to one end of each movable hole near the disc, and the other end of the spring is a free end.

3. The active segmented spandex feeding frame according to claim 2, characterized in that: The spring includes an inclined section near the side of the disc and a horizontal section connected to the end of the inclined section. The inclined end is inclined outward from the end fixed by the spring towards the free end. The cross-sections of the inclined section and the horizontal section are arc-shaped and coaxial with the cylinder.

4. An active segmented spandex feeding frame according to any one of claims 2-3, characterized in that: Two sliding grooves are symmetrically arranged on both sides of the outer end of the roller. The two sliding grooves are located on the axis of symmetry of the disc. A limit slider is slidably connected in the sliding groove. A limit stop is inserted into the inner end of the sliding groove. A spring is provided between the limit stop and the limit slider.

5. The active segmented spandex feeding frame according to claim 4, characterized in that: The sliding groove includes a main sliding groove, the outer side of which is connected to a T-shaped groove that penetrates the sidewall of the roller. A stop block slot is provided on each of the two inner sides of the main sliding groove. The limiting slider includes a slider body, the outer side of which is connected to a T-shaped block. A push-pull block is connected to the top of the slider body and the T-shaped block. The limiting stop block is inserted into the stop block slot. The slider body is located in the main sliding groove, the T-shaped block is slidably connected to the T-shaped groove, and the push-pull block is located on the outer surface of the disc. A spring limiting groove is provided on the inner sidewall of the slider body, one end of which is located in the spring limiting groove, and the other end abuts against the limiting stop block.

6. The active segmented spandex feeding frame according to claim 1, characterized in that: The roller includes a cylinder and a disc disposed at one end of the cylinder. A limit ring is disposed at the other end of the cylinder. A rubber ring is sleeved on the outer side of the cylinder, and the outer surface of the rubber ring is provided with anti-slip ripples.

7. The active 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, two motor control circuits and a communication circuit. The power supply circuit supplies power to the motor control circuit and the communication circuit. The communication circuit is connected to the motor control circuit and the motor control circuit is electrically connected to the stator.

8. The active segmented spandex feeding frame according to claim 7, 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.

9. The active segmented spandex feeding frame according to claim 8, 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 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.

10. The active segmented spandex feeding frame according to claim 8, characterized in that: The motor control circuit includes a sensor data interface circuit, which is connected to the main chip U2; a T-shaped fixing frame is provided at the bottom of the machine body, and two tension measuring displays are respectively provided on both sides of the fixing frame, which are electrically connected to the sensor data interface circuit.

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