A device for inspecting and loading a drawstring

Abstract

The utility model belongs to the technical field of automation equipment relates to a kind of detection and installation draw device.The utility model, including draw frame, be equipped with the lifting tool plate for placing spool on draw frame, lifting tool plate below is equipped with the drive mechanism due to driving lifting tool plate moves up and down, lifting tool plate is equipped with the thread end clamping tool corresponding with spool position.The utility model adopts layered clamping structure of inner layer thread tool base, inner layer thread clamping plate and outer layer thread tool base, outer layer thread clamping plate, cooperate the elastic clamping force provided by spring, can respectively fix the inner layer thread and outer layer thread of spool, completely avoid inner and outer layer yarn winding, and the elasticity of spring can be adjusted by bolt, adapt different thread diameter yarn, and clamping stability is significantly improved.

Description

Technical Field

[0001] This utility model belongs to the field of automation equipment technology and relates to a yarn inspection and drawing device. Background Technology

[0002] In the fields of textiles, cable processing, and electronic component lead manufacturing, yarn drawing is a crucial pre-processing step, mainly involving core operations such as yarn drawing, sorting, inspection, and end fixing. Existing yarn drawing devices generally suffer from the following technical defects: 1. The yarn clamping method is singular, often employing an integral clamping structure, which cannot distinguish between the inner and outer layers of the yarn, easily leading to tangling and knotting, affecting subsequent processing accuracy; 2. The yarn drawing process lacks an effective tension buffer and real-time detection mechanism, resulting in yarn breakage due to excessive tightness and accumulation due to excessive looseness, and failing to promptly detect yarn damage and abnormal tension; 3. The functions of cutting, clamping, and knotting are dispersed, requiring multiple independent mechanisms to work together, leading to high coordination difficulty, cumbersome operation procedures, and low efficiency; 4. The knotting mechanism is mostly of a single specification, unable to achieve precise knotting based on the different characteristics (such as diameter and material) of the inner and outer yarns, resulting in inconsistent knotting quality and a tendency for knots to unravel. Therefore, there is an urgent need to design a yarn drawing device that can overcome the above defects.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses an automatic yarn drawing device [application number: 201910747561.0], which includes a first mounting plate. A yarn suction device is installed on the front of the first mounting plate near one side of it, and a pressing device is installed on the front of the other side of the first mounting plate away from the yarn suction device. A weft yarn detection device is installed between the yarn suction device and the pressing device. However, this solution still has shortcomings in use. It cannot distinguish between the inner and outer layers of the yarn, which can easily lead to the inner and outer layers of yarn tangling and knotting, affecting the accuracy of subsequent processing. It also lacks an effective tension buffer and real-time detection mechanism during the yarn drawing process. Yarn that is too tight is prone to breakage, and yarn that is too loose is prone to accumulation. Furthermore, it cannot detect yarn damage and abnormal tension in a timely manner. It is also difficult to coordinate, has a cumbersome operation process, low work efficiency, and inconsistent knotting quality, which can easily lead to untying. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a yarn-drawing inspection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A yarn drawing and inspection device includes a yarn drawing frame, on which a lifting fixture plate for placing yarn spindles is provided. Below the lifting fixture plate is a driving mechanism for moving the lifting fixture plate up and down. The lifting fixture plate is provided with a yarn end clamping fixture corresponding to the position of the yarn spindle. An extension connecting frame is mounted on the yarn drawing frame. The extension connecting frame is equipped with a pneumatic knotting assembly and a three-axis truss machine structure that works with the pneumatic knotting assembly to knot the yarn ends.

[0006] In the above-mentioned yarn feeding and inspection device, the three-axis truss machine structure includes a three-axis truss machine component and a yarn clamping and detection buffer fixture disposed on an extension connecting frame, wherein the yarn clamping and detection buffer fixture is positioned corresponding to the pneumatic knotting component.

[0007] In the above-mentioned inspection and yarn drawing device, the three-axis truss machine assembly includes a transverse track frame disposed on an extension connecting frame, a vertical track frame that slides and engages with the transverse track frame, and a scissor that can rotate axially at the bottom of the vertical track frame.

[0008] In the above-mentioned yarn-drawing and inspection device, a first cylinder is provided at the end of the horizontal track frame, and the power shaft of the first cylinder is connected to the vertical track frame through a first connecting slider. A second cylinder is provided at the end of the vertical track frame, and the power shaft of the second cylinder is connected to the scissors through a second connecting slider. A servo motor for driving the scissors to rotate axially is provided on the second connecting slider.

[0009] In the above-mentioned yarn inspection and drawing device, the yarn clamping and detection buffer fixture includes a fixed horizontal plate disposed on an extension connecting frame, and yarn limiting frames and yarn clamping components that can reciprocate linearly in the horizontal direction are provided at both ends of the fixed horizontal plate.

[0010] In the above-mentioned yarn feeding and inspection device, the yarn clamping component includes a transverse sliding seat disposed at both ends of a fixed horizontal plate, a yarn clamping block is provided at the bottom of the transverse sliding seat, and a yarn clamping opening is provided on the yarn clamping block. The transverse sliding seat is driven by a third cylinder located on the fixed horizontal plate.

[0011] In the above-mentioned yarn inspection and drawing device, a vibration sensor is installed in the yarn limiting frame, and a yarn support frame is provided in the middle of the fixed horizontal plate, with the yarn support frame located between two yarn clamping blocks.

[0012] In the above-mentioned yarn inspection and drawing device, the yarn end clamping fixture includes two inner layer yarn fixture bases and two outer layer yarn fixture bases disposed on the lifting fixture plate. The inner layer yarn fixture bases are equipped with rotatable inner layer yarn clamping plates, and the outer layer yarn fixture bases are equipped with rotatable outer layer yarn clamping plates. Bolts are provided between the inner layer yarn clamping plates and the inner layer yarn fixture bases, and between the outer layer yarn clamping plates and the outer layer yarn fixture bases. Springs for providing elastic force are sleeved on the bolts.

[0013] In the above-mentioned yarn drawing and inspection device, the pneumatic knotting assembly includes an inner layer pneumatic knotter and an outer layer pneumatic knotter disposed on an extension connecting frame. The inner layer pneumatic knotter corresponds to the position of the inner layer tooling base, and the outer layer pneumatic knotter corresponds to the position of the outer layer tooling base.

[0014] In the above-mentioned yarn drawing and inspection device, the driving mechanism includes a servo motor mounted on the yarn drawing machine frame, and a connecting platform fixedly connected to the lifting fixture plate is connected to the power shaft of the servo motor.

[0015] Compared with existing technologies, the advantages of this utility model are: 1. This utility model adopts a layered clamping structure of inner layer wire tooling base and inner layer wire clamping plate and outer layer wire tooling base and outer layer wire clamping plate. With the elastic clamping force provided by the spring, the inner layer wire and outer layer wire of the spool can be fixed separately, completely avoiding the entanglement of inner and outer layer yarns. Moreover, the elasticity of the spring can be adjusted by bolts to adapt to yarns of different diameters, and the clamping stability is significantly improved.

[0016] 2. This utility model integrates functions such as lifting adjustment, layered clamping, tension detection, precise cutting, and automatic knotting into one unit. Through the coordinated operation of the three-axis truss machine structure and the pneumatic knotting component, the entire process of yarn drawing, sampling inspection, and knotting can be completed without manual intervention, which greatly shortens the operation cycle and reduces labor costs.

[0017] 3. The yarn clamping and detection buffer fixture in this utility model is equipped with a yarn support frame and a vibration sensor. The support frame provides support and buffer for the middle section of the yarn, avoiding yarn breakage due to gravity sagging or sudden tension changes during the yarn drawing process. The vibration sensor can monitor the changes in yarn tension in real time and promptly report problems such as yarn damage and abnormal tension, effectively improving the product qualification rate.

[0018] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a structural schematic diagram of a three-axis truss machine assembly.

[0021] Figure 3 This is a schematic diagram of the structure of the yarn clamping and detection buffer fixture.

[0022] Figure 4 This is a partial structural schematic diagram of the present invention.

[0023] Figure 5 This is a schematic diagram of the wire end clamping fixture. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-5 As shown, a yarn drawing device includes a yarn drawing frame 1, a lifting fixture plate 2 for placing a yarn spindle 100 on the yarn drawing frame 1, a driving mechanism 3 for driving the lifting fixture plate 2 to move up and down below the lifting fixture plate 2, a yarn end clamping fixture 4 corresponding to the position of the yarn spindle 100 on the lifting fixture plate 2, an extension connecting frame 5 on the yarn drawing frame 1, a pneumatic knotting assembly 6 on the extension connecting frame 5, and a three-axis truss machine structure 7 that cooperates with the pneumatic knotting assembly 6 to complete the knotting of the yarn end.

[0026] In this embodiment, the yarn drawing frame 1 serves as the mounting base for the entire device. It is welded from high-strength aluminum alloy profiles, providing sufficient structural rigidity to prevent positioning deviations caused by vibration during operation. The lifting fixture plate 2 is horizontally positioned in the middle of the yarn drawing frame 1, its dimensions adapted to the placement requirements of the yarn spindles 100. Its surface is treated with an anti-slip coating to ensure the yarn spindles 100 do not easily slip after placement. The drive mechanism 3 is installed at the bottom of the yarn drawing frame 1 and connected to the bottom center of the lifting fixture plate 2. It drives the lifting fixture plate 2 to move up and down along the vertical guide rail of the yarn drawing frame 1, achieving height adjustment of the yarn spindles 100. The thread end clamping fixture 4 is fixed to the upper surface of the lifting fixture plate 2, corresponding one-to-one with the thread exit position of the yarn spindles 100. It precisely clamps the inner and outer thread ends of the yarn spindles 100, preventing yarn from falling off during the drawing process. The extension connecting frame 5 is bolted to one side of the top of the yarn drawing frame 1. Its length is designed according to the operating stroke requirements and is pneumatic. The pneumatic knotting assembly 6 and the three-axis truss machine structure 7 provide an installation carrier, allowing them to form a reasonable working distance with the yarn end clamping fixture 4 and the lifting fixture plate 2. Both the pneumatic knotting assembly 6 and the three-axis truss machine structure 7 are installed on the lower surface of the extension connecting frame 5, and their positions correspond to each other, ensuring that the yarn clamped by the three-axis truss machine structure 7 can be accurately connected to the knotting position of the pneumatic knotting assembly 6. After the drive mechanism 3 drives the lifting fixture plate 2 and the spindle 100 to rise to the appropriate height, the yarn end clamping fixture 4 fixes the yarn end, the three-axis truss machine structure 7 completes the yarn extraction, cutting, and clamping detection, and the pneumatic knotting assembly 6 knots and fixes the cut yarn end, forming an integrated operation process of "lifting-clamping-extraction-detection-cutting-knotting". The lifting adjustment, layered clamping, cutting, detection, and knotting functions are integrated into the same frame, solving the problem of the existing device's functions being scattered and difficult to coordinate, and greatly improving the continuity and efficiency of the operation.

[0027] Combination Figure 1-5 As shown, the three-axis truss machine structure 7 includes a three-axis truss machine assembly 8 and a yarn clamping detection buffer fixture 9 disposed on the extension connecting frame 5. The yarn clamping detection buffer fixture 9 corresponds to the position of the pneumatic knotting assembly 6.

[0028] Specifically, the three-axis truss machine structure 7 is the core actuator for achieving precise yarn handling, comprising the three-axis truss machine assembly 8 and the yarn clamping, detection, and buffer fixture 9. The three-axis truss machine assembly 8 is installed at the end of the extension connecting frame 5, arranged along the length of the extension connecting frame 5; the yarn clamping, detection, and buffer fixture 9 is installed in the middle of the extension connecting frame 5, located between the three-axis truss machine assembly 8 and the pneumatic knotting assembly 6, with the center lines of the three components in the same vertical plane, ensuring a smooth and unbiased path for the yarn during transmission. The three-axis truss machine assembly 8 is responsible for cutting and clamping the yarn ends, while the yarn clamping, detection, and buffer fixture 9 is responsible for limiting, tension detection, and supporting the middle section of the yarn. The two work together to maintain stable tension in the yarn before cutting, and after cutting, it can be accurately transmitted to the pneumatic knotting assembly 6. By separating the "cutting-clamping" and "detection-buffering" functions into two matching components, the independent and efficient operation of each function is ensured, while the precise correspondence of positions enables coordinated linkage, improving operational accuracy and stability.

[0029] Combination Figure 1-5 As shown, the three-axis truss machine assembly 8 includes a transverse track frame 10 mounted on an extension connecting frame 5. The transverse track frame 10 is provided with a vertical track frame 11 that slides and engages with the transverse track frame 10. The bottom of the vertical track frame 11 is provided with axially rotatable shears 12.

[0030] In this embodiment, the transverse track frame 10 of the three-axis truss machine assembly 8 is fixed to the lower surface of the extension connecting frame 5 by bolts, and its length direction is consistent with that of the extension connecting frame 5. The track groove is provided with a linear guide rail and a slider to ensure smooth sliding of the vertical track frame 11. The vertical track frame 10 is vertically set on the slider of the transverse track frame 10 and can move horizontally back and forth along the transverse track frame 10. The track groove of the vertical track frame 11 is also provided with a linear guide rail and a slider. The scissors 12 is fixed to the slider by a connecting seat and can move up and down along the vertical track frame 11. The rotating shaft of the scissors 12 is connected to the connecting seat by a bearing, which can achieve 360° axial rotation. The sliding of the vertical track frame 11 along the transverse track frame 10 realizes the horizontal adjustment of the cutting position, and the sliding of the scissors 12 along the vertical track frame 11 realizes the adjustment of the cutting height. The axial rotation of the scissors 12 can adapt to the yarn cutting requirements at different angles. The combination of the three realizes the three-dimensional precise positioning of the cutting position.

[0031] The horizontal track frame 10 is provided with a first cylinder 13 at its end. The power shaft of the first cylinder 13 is connected to the vertical track frame 11 through a first connecting slider 14. The vertical track frame 11 is provided with a second cylinder 15 at its end. The power shaft of the second cylinder 15 is connected to the scissors 12 through a second connecting slider 16. The second connecting slider 16 is provided with a servo motor for driving the scissors 12 to rotate axially.

[0032] In this embodiment, the first cylinder 13 is fixed to one end of the transverse track frame 10 via a cylinder seat. Its power shaft is arranged along the length direction of the transverse track frame 10, and the end of the power shaft is threadedly connected to the first connecting slider 14. The first connecting slider 14 is fixedly connected to the top of the vertical track frame 11. When the first cylinder 13 extends or retracts, it can drive the vertical track frame 11 to perform horizontal reciprocating motion along the transverse track frame 10 via the first connecting slider 14. The second cylinder 15 is fixed to the top of the vertical track frame 11 via a cylinder seat. Its power shaft is arranged along the length direction of the vertical track frame 11, and the end of the power shaft is threadedly connected to the second connecting slider 16. The second connecting slider 16 is fixedly connected to the connecting seat of the scissors 12. When the second cylinder 15 extends or retracts, it can drive the scissors 12 to move up and down along the vertical track frame 11. The servo motor is fixed to the side of the second connecting slider 16 through the bracket, and its output shaft is connected to the rotating shaft of the scissors 12 through the coupling. The servo motor can drive the scissors 12 to rotate axially around the rotating shaft from 0 to 360 degrees, and the rotation angle can be precisely adjusted by the controller.

[0033] Combination Figure 1-5 As shown, the yarn clamping detection buffer fixture 9 includes a fixed horizontal plate 17 disposed on the extension connecting frame 5. The fixed horizontal plate 17 has yarn limiting frames 18 and yarn clamping members 19 that can reciprocate linearly in the horizontal direction at both ends.

[0034] In this embodiment, the fixed horizontal plate 17 is horizontally fixed to the lower surface of the extension connecting frame 5 by bolts, located between the three-axis truss machine assembly 8 and the pneumatic knotting assembly 6, and its length is adapted to the yarn clamping and detection requirements. The yarn limiting frame 18 has a U-shaped structure and is fixed to one end of the fixed horizontal plate 17 by bolts. Its opening faces the yarn transmission direction and is used to limit the lateral deviation of the yarn, ensuring that the yarn is transmitted along a preset path. The yarn clamping member 19 is set at the other end of the fixed horizontal plate 17, corresponding to the yarn limiting frame 18. Its bottom is provided with a sliding guide rail, which can make horizontal reciprocating linear movement along the length of the fixed horizontal plate 17. It is used to clamp or release the yarn end. The yarn passes through the opening of the yarn limiting frame 18, extends through the upper surface of the fixed horizontal plate 17 to the yarn clamping member 19. The yarn limiting frame 18 limits the lateral deviation of the yarn, and the yarn clamping member 19 realizes the clamping and release of the yarn through reciprocating movement. The two work together to ensure that the yarn position is stable during detection and transmission. The yarn limiting frame 18 has a simple structure and reliable limiting, and the yarn clamping member 19 moves flexibly and clamps stably. The synergistic effect of the two can effectively prevent the yarn from deviating or falling off, providing a stable yarn state for subsequent detection and knotting.

[0035] The yarn clamping member 19 includes a transverse sliding seat 20 disposed at both ends of the fixed horizontal plate 17. The bottom of the transverse sliding seat 20 is provided with a yarn clamping block 21. The yarn clamping block 21 is provided with a yarn clamping opening 22. The transverse sliding seat 20 is driven by a third cylinder 23 located on the fixed horizontal plate 17.

[0036] In this embodiment, the transverse sliding seat 20 cooperates with the sliding guide rail on the fixed horizontal plate 17 through the slider, and can make horizontal reciprocating motion along the guide rail. The two transverse sliding seats 20 are symmetrically arranged at both ends of the fixed horizontal plate 17, respectively corresponding to the clamping of the inner layer line and the outer layer line. The yarn clamping block 21 is fixed to the bottom of the transverse sliding seat 20 by bolts. The yarn clamping opening 22 on its lower surface has a V-shaped structure with an opening angle of 30-60°, which can accommodate yarns of different diameters. The inner wall of the opening is treated with anti-slip material to improve clamping stability. The third cylinder 23 is fixed to the side of the fixed horizontal plate 17 by a cylinder seat. Its power shaft is set along the movement direction of the transverse sliding seat 20. The end of the power shaft is fixedly connected to the transverse sliding seat 20 by a connecting block. Each transverse sliding seat 20 corresponds to a third cylinder 23, which can be independently controlled. When it is necessary to clamp the yarn, the third cylinder 23 drives the transverse sliding seat 20 to move in the direction of the yarn, so that the yarn is embedded in the yarn clamping opening 22. The yarn is clamped by the contraction force of the V-shaped opening. When it is necessary to release the yarn, the third cylinder 23 drives the transverse sliding seat 20 to move in the opposite direction, the yarn clamping opening 22 is released, and the yarn can move freely.

[0037] The yarn limiting frame 18 is equipped with a vibration sensor, and the fixed horizontal plate 17 has a yarn support frame 24 in the middle, which is located between two yarn clamping blocks 21.

[0038] In this embodiment, the vibration sensor is embedded in the inner wall of the yarn limiting frame 18. Its sensing end corresponds to the yarn transmission path and can detect the vibration frequency and amplitude during the yarn transmission process in real time, thereby determining the tension state and integrity of the yarn (such as whether there is damage or breakage). The vibration sensor is electrically connected to the controller of the device. When an abnormal signal is detected, the controller can issue an alarm signal and suspend operation. The yarn support frame 24 has a V-shaped arc structure and is fixed to the middle of the fixed horizontal plate 17 by a bracket. Its arc surface is smoothed to avoid scratching the yarn. Its position is between the two yarn clamping blocks 21 to support the slack yarn in the middle section, forming a buffer section. After the yarn passes through the yarn limiting frame 18, it rests on the V-shaped arc surface of the yarn support frame 24 and then extends to the two yarn clamping blocks 21. The vibration sensor monitors the vibration state of the yarn in real time. The yarn support frame 24 provides support for the yarn and avoids uneven tension caused by the middle section of the yarn sagging due to gravity. The vibration sensor realizes real-time detection of yarn tension and integrity, which can detect abnormal problems in time and prevent unqualified yarn from flowing into subsequent processes. The arc support structure of the yarn support frame 24 forms a natural tension buffer, reducing the risk of yarn breakage caused by sudden tension changes, and at the same time avoiding damage caused by direct friction between the yarn and the fixed horizontal plate 17.

[0039] Combination Figure 1-5 As shown, the wire end clamping fixture 4 includes two inner wire fixture bases 25 and two outer wire fixture bases 26 disposed on the lifting fixture plate 2. The inner wire fixture base 25 is equipped with a rotatable inner wire clamping plate 27, and the outer wire fixture base 26 is equipped with a rotatable outer wire clamping plate 28. Bolts 29 are provided between the inner wire clamping plate 27 and the inner wire fixture base 25, and between the outer wire clamping plate 28 and the outer wire fixture base 26. Springs 30 for providing elastic force are sleeved on the bolts.

[0040] In this embodiment, the two inner wire tooling bases 25 and the two outer wire tooling bases 26 are all fixed to the upper surface of the lifting tooling plate 2 by bolts, and are symmetrically distributed, corresponding to the ends of the inner and outer wires of the wire spindle 100, respectively. The inner wire clamping plate 27 is hinged to the inner wire tooling base 25 by a rotating shaft, and can rotate around the rotating shaft. Its clamping surface corresponds to the upper surface of the inner wire tooling base 25. The outer wire clamping plate 28 is hinged to the outer wire tooling base 26 by a rotating shaft, and its structure is the same as that of the inner wire clamping plate 27. The bolt 29 passes through the corresponding through holes of the inner wire clamping plate 27 and the inner wire tooling base 25. The spring 30 is sleeved in the middle of the bolt 29 and is located between the inner wire clamping plate 27 and the inner wire tooling base 25. Similarly, the outer wire clamping plate 28 and the outer wire tooling base 26 are also connected to the spring 30 by bolts 29 of the same structure. The spring 30 is in a compressed state, providing continuous clamping force to the inner layer clamping plate 27 and the outer layer clamping plate 28. The compression of the spring 30 can be changed by adjusting the tightness of the bolt 29, thereby adjusting the clamping force. In use, the inner layer clamping plate 27 and the outer layer clamping plate 28 are opened, and the ends of the inner and outer layers of the yarn spindle 100 are placed on the clamping surfaces of the inner layer tooling base 25 and the outer layer tooling base 26, respectively. After the clamping plates are released, the elasticity of the spring 30 drives the clamping plates to return to their original position, thereby clamping and fixing the yarn ends. The clamping requirements of different yarn diameters can be adapted by adjusting the bolt 29, ensuring that the clamping is firm and does not damage the yarn.

[0041] Combination Figure 1-5 As shown, the pneumatic knotting assembly 6 includes an inner layer pneumatic knotter 31 and an outer layer pneumatic knotter 32 disposed on the extension connecting frame 5. The inner layer pneumatic knotter 31 is positioned opposite to the inner layer tooling base 25, and the outer layer pneumatic knotter 32 is positioned opposite to the outer layer tooling base 26.

[0042] In this embodiment, both the inner layer pneumatic knotter 31 and the outer layer pneumatic knotter 32 are fixed to the lower surface of the extension connecting frame 5 via mounting bases. They are symmetrically distributed. The knotting position of the inner layer pneumatic knotter 31 corresponds vertically to the position of the inner layer tooling base 25, and the knotting position of the outer layer pneumatic knotter 32 corresponds vertically to the position of the outer layer tooling base 26, ensuring that the ends of the inner and outer layer yarns can be accurately connected to the corresponding knotters. Both the inner layer pneumatic knotter 31 and the outer layer pneumatic knotter 32 use high-pressure air... Driven by a pneumatic mechanism, the machine features fast knotting speed and strong knots. Both pneumatic knotters are electrically connected to the controller of the device, enabling synchronous or separate knotting to meet different operational needs. The three-axis truss machine structure 7 transmits the inner layer yarn end to the knotting station of the inner layer yarn pneumatic knotter 31 and the outer layer yarn end to the knotting station of the outer layer yarn pneumatic knotter 32. The controller controls the two pneumatic knotters to operate synchronously or separately, completing the knotting and fixing of the inner and outer layer yarn ends. The knotted yarn ends are not easy to come undone, and the knot size is uniform.

[0043] Combination Figure 1-5 As shown, the drive mechanism 3 includes a servo motor 33 mounted on the yarn drawing frame 1, and a connecting platform 34 fixedly connected to the lifting fixture plate 2 is connected to the power shaft of the servo motor 33.

[0044] In this embodiment, the servo motor 33 is fixed to the bottom center of the yarn drawing frame 1 via a motor mount, with its power axis pointing upwards. It is connected to the lower end of the ball screw via a coupling, and the upper end of the ball screw is threaded to the bottom center of the connecting platform 34. The upper surface of the connecting platform 34 is fixed to the bottom of the lifting fixture plate 2 via bolts. The two sides of the lifting fixture plate 2 slide against the vertical guide rails of the yarn drawing frame 1 to ensure a smooth lifting process. After the controller issues a lifting command, the servo motor 33 drives the ball screw to rotate, and the ball screw converts the rotational motion into linear motion of the connecting platform 34, thereby driving the lifting fixture plate 2 to move up and down along the vertical guide rails. This achieves height adjustment of the spindle 100, allowing the yarn end to be precisely aligned with the working position of the yarn end clamping fixture 4, the three-axis truss machine structure 7, and the pneumatic knotting assembly 6.

[0045] The working principle of this utility model is as follows: Initial state: The servo motor 33 of the drive mechanism 3 is in the initial position, and the lifting fixture plate 2 is in the lower limit position, which is convenient for the operator to place the spindle 100; the inner layer wire clamping plate 27 and the outer layer wire clamping plate 28 of the wire end clamping fixture 4 are in the loose state, the spring 30 is compressed, and it is waiting for the yarn end to be placed; the first cylinder 13 and the second cylinder 15 of the three-axis truss machine structure 7 are both in the middle position, driving the yarn clamping block 21 and the scissors 12 to move to the center position; the inner layer pneumatic knotter 31 and the outer layer pneumatic knotter 32 of the pneumatic knotting assembly 6 are in the lower limit position to avoid interfering with the yarn transmission; the third cylinder 23 of the yarn clamping detection buffer fixture 9 is in the extended state, the yarn clamping opening 22 of the yarn clamping block 21 is in the open state, a section of yarn with a slack in the middle is reserved on the yarn support frame 24 as a buffer section, and the vibration sensor is in the standby detection state; Preparation stage: The operator places the spindle 100 at the designated position on the lifting fixture plate 2, places the inner layer yarn end of the spindle 100 on the inner layer yarn fixture base 25 and the outer layer yarn end on the outer layer yarn fixture base 26, loosens the inner layer yarn clamping plate 27 and the outer layer yarn clamping plate 28, and the elastic force of the spring 30 drives the clamping plate to clamp the yarn end; then the device is started, the controller issues a command, and the servo motor 33 drives the lifting fixture plate 2 to rise to the preset working height, so that the yarn end is aligned with the working mechanism below the extension connecting frame 5; Inspection process: The third cylinder 23 retracts, driving the two transverse sliding seats 20 to move towards the center. The yarn clamping opening 22 of the yarn clamping block 21 clamps the yarn end (the inner and outer layers of yarn are clamped by their respective clamping blocks); the first cylinder 13 of the three-axis truss machine structure 7 extends and the second cylinder 15 retracts, driving the scissors 12 to move to the preset cutting position outside the yarn clamping block 21. The servo motor drives the scissors 12 to rotate to the appropriate angle, and the scissors 12 closes to cut the yarn; the middle section of yarn after cutting loses its clamping and falls from the yarn support frame 24 to the weighing and detection device below (not shown in the attached figure), completing the yarn weight detection (which can reflect the uniformity of yarn diameter); at the same time, the vibration sensor has detected the yarn tension in real time before cutting. If abnormal vibration is detected (such as yarn damage, excessive / insufficient tension), the controller immediately issues an alarm signal and stops the operation; after the weighing and detection is completed, if the yarn is qualified, it enters the knotting process; if it is unqualified, the device stops and prompts the operator to handle it. The yarn end knotting process is as follows: The third cylinder 23 extends, driving the yarn clamping block 21 to move towards both ends. Simultaneously, the first cylinder 13 retracts and the second cylinder 15 extends, driving the scissors 12 to move towards the center, intersecting with the yarn clamping block 21 at the center position, precisely transferring the cut yarn end to the knotting station of the pneumatic knotting assembly 6. The controller issues a knotting command, and the inner layer pneumatic knotter 31 and outer layer pneumatic knotter 32 of the pneumatic knotting assembly 6 rise synchronously, approaching the yarn end. The third cylinder 23 retracts again, and the yarn clamping block 21 moves in the same direction towards the center, coordinating with... The pneumatic knotter moves the yarn end into its knotting mechanism. The pneumatic knotter starts, using high-pressure airflow to drive the internal knotting structure, securing the yarn end with a strong and consistent knot. After knotting, the pneumatic knotter lowers and resets, the third cylinder 23 extends, the yarn clamping block 21 releases the yarn, and the scissors 12, driven by the first cylinder 13, the second cylinder 15, and the servo motor, resets to the center position. The lifting fixture plate 2 lowers to its initial position, and the operator removes the yarn spindle 100 after inspection and yarn pulling. The device then enters the next work cycle.

[0046] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

Claims

1. A yarn-drawing inspection and assembly device, comprising a yarn-drawing frame (1), characterized in that, The drawing frame (1) is provided with a lifting fixture plate (2) for placing the spindle (100). Below the lifting fixture plate (2) is a driving mechanism (3) for driving the lifting fixture plate (2) to move up and down. The lifting fixture plate (2) is provided with a thread end clamping fixture (4) corresponding to the position of the spindle (100). The drawing frame (1) is provided with an extension connecting frame (5). The extension connecting frame (5) is provided with a pneumatic knotting assembly (6) and a three-axis truss machine structure (7) that works with the pneumatic knotting assembly (6) to complete the knotting of the thread end.

2. The yarn-feeding and inspecting device according to claim 1, characterized in that, The three-axis truss machine structure (7) includes a three-axis truss machine assembly (8) and a yarn clamping detection buffer fixture (9) mounted on an extension connecting frame (5). The yarn clamping detection buffer fixture (9) corresponds to the position of the pneumatic knotting assembly (6).

3. The yarn-feeding and inspecting device according to claim 2, characterized in that, The three-axis truss machine assembly (8) includes a transverse track frame (10) mounted on an extension connecting frame (5), a vertical track frame (11) which is slidably engaged with the transverse track frame (10), and a rotatable scissor (12) at the bottom of the vertical track frame (11).

4. The yarn-feeding and inspecting device according to claim 3, characterized in that, The end of the horizontal track frame (10) is provided with a first cylinder (13), the power shaft of the first cylinder (13) is connected to the vertical track frame (11) through a first connecting slider (14), the end of the vertical track frame (11) is provided with a second cylinder (15), the power shaft of the second cylinder (15) is connected to the scissors (12) through a second connecting slider (16), and the second connecting slider (16) is provided with a servo motor for driving the scissors (12) to rotate axially.

5. The yarn-feeding and inspecting device according to claim 4, characterized in that, The yarn clamping detection buffer fixture (9) includes a fixed horizontal plate (17) set on the extension connecting frame (5), and yarn limiting frames (18) and yarn clamping parts (19) that can reciprocate linearly in the horizontal direction are provided at both ends of the fixed horizontal plate (17).

6. The yarn-feeding and inspecting device according to claim 5, characterized in that, The yarn clamping component (19) includes a transverse sliding seat (20) disposed at both ends of the fixed horizontal plate (17). The bottom of the transverse sliding seat (20) is provided with a yarn clamping block (21). The yarn clamping block (21) is provided with a yarn clamping opening (22). The transverse sliding seat (20) is driven by a third cylinder (23) located on the fixed horizontal plate (17).

7. The yarn-feeding and inspecting device according to claim 6, characterized in that, The yarn limiting frame (18) is equipped with a vibration sensor, and the fixed horizontal plate (17) has a yarn support frame (24) in the middle, which is located between two yarn clamping blocks (21).

8. A yarn-drawing and inspecting device according to claim 7, characterized in that, The wire end clamping fixture (4) includes two inner wire fixture bases (25) and two outer wire fixture bases (26) set on the lifting fixture plate (2). The inner wire fixture bases (25) are equipped with rotatable inner wire clamps (27), and the outer wire fixture bases (26) are equipped with rotatable outer wire clamps (28). Bolts (29) are provided between the inner wire clamps (27) and the inner wire fixture bases (25) and between the outer wire clamps (28) and the outer wire fixture bases (26). Springs (30) for providing elastic force are sleeved on the bolts.

9. A yarn-drawing and inspecting device according to claim 8, characterized in that, The pneumatic knotting assembly (6) includes an inner layer pneumatic knotter (31) and an outer layer pneumatic knotter (32) disposed on the extension connecting frame (5). The inner layer pneumatic knotter (31) is positioned relative to the inner layer tooling base (25), and the outer layer pneumatic knotter (32) is positioned relative to the outer layer tooling base (26).

10. A yarn-drawing and inspecting device according to claim 1, characterized in that, The drive mechanism (3) includes a servo motor (33) mounted on the yarn drawing frame (1), and a connecting platform (34) fixedly connected to the lifting tooling plate (2) is connected to the power shaft of the servo motor (33).

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