A yarn-changing mechanism without cutting and its control method, featuring a central yarn clamp and radial telescopic claws.

Abstract

This application relates to the technical field of fiberglass furnace drawing equipment, specifically to a non-cutting yarn changing mechanism with intermediate yarn clamping and radial telescopic claws, and its control method. The non-cutting yarn changing mechanism includes an upper changing seat; the upper changing seat has an inner cavity, and at least two yarn pushing channels are provided on the side wall of the inner cavity; it also includes a yarn clamping mechanism, a telescopic claw mechanism, and a yarn pushing mechanism. Through the cooperation of the yarn clamping mechanism, the telescopic claw mechanism, and the yarn pushing mechanism, this application not only automates and efficiently completes the yarn changing operation, but also automatically recovers the transition yarn formed during the changing process, and solves the problem of yarn tailing at the machine head.

Description

Technical Field

[0001] This application relates to the technical field of fiberglass furnace drawing equipment, specifically to a non-cutting yarn changing mechanism with intermediate yarn clamping and radial telescopic claws and its control method. Background Technology

[0002] Glass fiber, as a composite reinforcing material, has a wide range of applications and varieties, including direct drawing into cylindrical yarn balls by a drawing machine and drawing into horse-shaped yarn balls by a yarn cake drawing machine, etc.

[0003] In the current fiberglass furnace drawing process, the yarn is wound onto the upper wire ring by a V-groove with a wire hook or a threaded groove with a wire hook. This is a superior upper wire ring structure in recent years. However, the yarn left on the upper wire ring is difficult for the robot to remove. It must be manually cut and removed on-site before the robot can complete the yarn removal work. Such human-machine cooperation poses safety hazards and cannot achieve automated continuous production.

[0004] With societal progress, harsh working environments and operational safety have become paramount. In the era of intelligent manufacturing, replacing manual labor with enclosed, fully automated robotic arms in the yarn drawing area, along with energy conservation and improved production efficiency, have become urgent priorities. To address the challenges of increasing the utilization value of waste yarn at the top of the yarn drawing machine and achieving unmanned automation, breakthroughs are needed in cutting and removing yarn remaining on the yarn drawing ring. This will enable upgrades to existing equipment, achieving automated production operations that push out the entire loop of waste yarn at the top of the yarn drawing machine without human intervention. This will improve the overall performance and efficiency of existing yarn drawing machines, significantly enhancing the residual value of waste yarn at the top of the yarn drawing machine and achieving substantial economic benefits.

[0005] Related technical documents:

[0006] Chinese Patent: Automatic Yarn-Pulling Machine and Control Method for Automatic Yarn-Pulling and Transitioning without Yarn Cutting, Application Publication No. CN 118459081 A, which relates to an automatic yarn-pulling and transitioning scheme using a transition ring.

[0007] Chinese Patent: Automatic Push-out Mechanism for Upper Head Changer Without Cutting and Control Method Thereof with Telescopic Claws and Fixed Claws Arranged in a Cross Pattern, Application Publication No. CN 118545903 A, which relates to the upper head changing yarn pushing assembly seat and the telescopic claw mechanism.

[0008] Chinese Patent: A cutting-free top-changing transition ring mechanism that can automatically push out a whole circle of yarn, application publication number CN 118459082 A, relates to a yarn pushing transition ring.

[0009] Chinese patent: Slow-pulling automatic yarn feeding online non-cutting transition yarn feeding mechanism, publication number CN211141896U; involving existing yarn feeding hooks and yarn feeding ring grooves, as well as machine head turntables and double machine head configuration schemes; and slow-pulling traction mechanism.

[0010] Chinese Patent: A dual-path air pipe for use on a CNC wire drawing machine (Announcement No.: CN222893107U); relates to a dual-path air distribution pipe on the main spindle of the machine head.

[0011] Chinese Patent: An Automatic Yarn Cutting Mechanism for a Wire Drawing Machine (Announcement No.: CN222138959U); This invention relates to an automatic yarn cutting mechanism.

[0012] Chinese Patent: A Multi-stroke Push Screw Mechanism for a Wire Drawing Machine (Announcement No.: CN222274392U); relates to a push screw mechanism. Summary of the Invention

[0013] In view of this, this application provides a yarn-changing mechanism without cutting and a control method thereof with intermediate yarn clamping and radial telescopic claws, to solve all or part of the technical problems described in the background section of this application.

[0014] The inventive concept of this application is as follows: 1. The yarn can be fed from the circumference or from the middle of the yarn, improving the feeding efficiency and quality, and minimizing the amount of transition yarn; 2. An upper yarn changer is set on the yarn changer, and a telescopic claw mechanism is set on the upper yarn changer. After the yarn is full, it enters the telescopic claw, and the yarn is captured and changed by the circumferential surface of the telescopic claw, improving the yarn change efficiency and ensuring that the yarn pushing mechanism can smoothly push out the transition yarn; 3. By setting a yarn cutting blade and a yarn clamping mechanism on the upper yarn changer, the traction connection is cut off at the moment of completion of the feeding, solving the problem of yarn tailing at the yarn head.

[0015] The yarn-changing mechanism without cutting, with intermediate yarn clamping and radial telescopic claws, provided in this application to solve its technical problem is as follows:

[0016] A yarn-changing mechanism for non-cutting yarn with a central yarn clamp and radial telescopic claws, comprising an upper changing head seat; the upper changing head seat has an inner cavity, and at least two yarn-pushing channels are provided on the side wall of the inner cavity; characterized in that:

[0017] It also includes a yarn clamping mechanism; the yarn clamping mechanism includes a first yarn clamping plate, a first yarn clamping drive mechanism, a second yarn clamping plate, and a second yarn clamping drive mechanism; the first yarn clamping drive mechanism and the second yarn clamping drive mechanism are both located in the inner cavity of the upper head changing seat, and the first yarn clamping plate and the second yarn clamping plate are respectively connected to the first yarn clamping drive mechanism and the second yarn clamping drive mechanism; the first yarn clamping plate and the second yarn clamping plate can close and separate to complete yarn clamping and return to position;

[0018] It also includes a telescopic claw mechanism; the telescopic claw mechanism includes a first telescopic claw, a first telescopic drive mechanism, a second telescopic claw, and a second telescopic drive mechanism; the first telescopic claw and the second telescopic claw are both disposed on the outer circumference of the upper head changing seat, the first telescopic drive mechanism and the second telescopic drive mechanism are both disposed in the inner cavity of the upper head changing seat, and the first telescopic claw and the second telescopic claw are respectively connected to the first telescopic drive mechanism and the second telescopic drive mechanism; the first telescopic claw and the second telescopic claw can open and retract to complete yarn feeding and return.

[0019] When loading the yarn, the first and second yarn clamping plates are closed to clamp the yarn, while the first and second telescopic claws are opened to facilitate winding the yarn onto the yarn. When handling the transition yarn, the first and second yarn clamping plates are separated to clear the path for pushing the yarn, while the first and second telescopic claws are contracted to loosen the transition yarn loop.

[0020] As a preferred embodiment of the yarn clamping mechanism, the first yarn clamping drive mechanism and the second yarn clamping drive mechanism have the same structure, both including: a yarn clamping piston cylinder and a yarn clamping piston rod; the two yarn clamping piston cylinders are both disposed in the inner cavity of the upper head changing seat and are arranged opposite to each other, the piston parts of the two yarn clamping piston rods are both disposed in the piston chambers of the corresponding yarn clamping piston cylinders and the connecting rod parts extend out of the piston chambers of the yarn clamping piston cylinders, and the first yarn clamping plate and the second yarn clamping plate are respectively connected to the extended end of the connecting rod part of the corresponding yarn clamping piston rod.

[0021] As a preferred embodiment of the yarn clamping mechanism, the first yarn clamping drive mechanism and the second yarn clamping drive mechanism further include: a yarn clamping cylinder cover and a yarn clamping elastic element; the yarn clamping cylinder cover is disposed at the opening of the piston chamber of the yarn clamping piston cylinder, and the connecting rod portion of the yarn clamping piston rod extends out of the piston chamber of the yarn clamping piston cylinder through the yarn clamping cylinder cover; the yarn clamping elastic element is disposed in the piston chamber of the yarn clamping piston cylinder and its two ends act on the piston portion of the yarn clamping piston rod and the bottom of the piston chamber of the yarn clamping piston cylinder, respectively.

[0022] As a preferred embodiment of the yarn clamping mechanism, the first yarn clamping drive mechanism and the second yarn clamping drive mechanism are located on the same radial direction of the machine head so that they can be aligned when clamping the yarn.

[0023] Explanation of the yarn clamping principle: The air supply points of the first and second yarn clamping drive mechanisms are both located between the piston part of the yarn clamping cylinder head and the yarn clamping piston rod. When compressed air is supplied, the first and second yarn clamping drive mechanisms can drive the first and second yarn clamping plates to separate from each other and compress the yarn clamping elastic elements at the same time. After the compressed air is disconnected, the first and second yarn clamping drive mechanisms can drive the first and second yarn clamping plates to close together and clamp the yarn under the action of their respective yarn clamping elastic elements.

[0024] As a preferred embodiment of the telescopic claw mechanism, the first telescopic drive mechanism and the second telescopic drive mechanism have the same structure, both including: a telescopic piston cylinder and a telescopic piston rod; the two telescopic piston cylinders are both disposed in the inner cavity of the upper head seat and are arranged opposite to each other, the piston parts of the two telescopic piston rods are both disposed in the piston chambers of the corresponding telescopic piston cylinders, and the first telescopic claw and the second telescopic claw are respectively connected to the extended end of the connecting rod part of the corresponding telescopic piston rod.

[0025] As a preferred embodiment of the telescopic claw mechanism, the first telescopic drive mechanism and the second telescopic drive mechanism further include: a telescopic cylinder head and a telescopic elastic element; the telescopic cylinder head is disposed at the opening of the piston chamber of the telescopic piston cylinder, and the connecting rod portion of the telescopic piston rod extends out of the piston chamber of the telescopic piston cylinder through the telescopic cylinder head; the telescopic elastic element is disposed inside the piston chamber of the telescopic piston cylinder and its two ends act on the piston portion of the telescopic piston rod and the bottom of the piston chamber of the telescopic piston cylinder, respectively.

[0026] As a preferred embodiment of the telescopic claw mechanism, the first telescopic drive mechanism and the second telescopic drive mechanism are located on the same radial direction of the machine head so as to form symmetrical support force when the yarn is wound onto the head.

[0027] As a preferred embodiment of the telescopic claw mechanism, the telescopic claw mechanism includes six telescopic claws and their telescopic drive mechanism; the six telescopic claws and their telescopic drive mechanism are evenly distributed around the axis of the machine head.

[0028] Explanation of the telescopic principle: The air supply points of the first telescopic drive mechanism and the second telescopic drive mechanism are both located between the piston part of the telescopic cylinder head and the telescopic piston rod; when compressed air is supplied, the first telescopic drive mechanism and the second telescopic drive mechanism can drive the first telescopic claw and the second telescopic claw to contract radially and compress the telescopic elastic element at the same time; when the compressed air is disconnected, the first telescopic drive mechanism and the second telescopic drive mechanism can drive the first telescopic claw and the second telescopic claw to open radially under the action of their respective telescopic elastic elements.

[0029] As a preferred embodiment of the telescopic claw mechanism, both the first and second telescopic claws are provided with threaded surfaces and fixing rod grooves; a fixing rod is provided in each fixing rod groove.

[0030] When the telescopic claw opens, the fixed rod enters the fixed rod groove, and the threaded surface protrudes from the fixed rod to facilitate efficient yarn winding. When the telescopic claw retracts and returns to its original position, the fixed rod protrudes from the fixed rod groove, which allows the yarn to be peeled off from the threaded surface and the transition yarn loop to be supported on the fixed rod for easy yarn pushing.

[0031] Furthermore, the yarn-changing mechanism without cutting, with intermediate yarn clamping and radial telescopic claws, also includes a machine head, with the upper changing head seat fixedly mounted on the machine head.

[0032] Furthermore, the yarn-changing mechanism for the non-cutting yarn with intermediate yarn clamping and radial telescopic claws also includes a yarn pushing mechanism; the yarn pushing mechanism includes a yarn pushing piston rod, an axial yarn pushing claw, a yarn pushing elastic element, and a yarn pushing piston chamber cover; a yarn pushing piston chamber is provided inside the machine head; the yarn pushing piston chamber cover is located at the opening of the yarn pushing piston chamber, the piston part of the yarn pushing piston rod is located inside the yarn pushing piston chamber and the connecting rod part extends out of the yarn pushing piston chamber cover, and the axial yarn pushing claw is located on the extended end of the connecting rod part of the yarn pushing piston rod; the yarn pushing elastic element is located inside the yarn pushing piston chamber and its two ends act on the yarn pushing piston chamber cover and the piston part of the yarn pushing piston rod respectively; the axial yarn pushing claw includes several radially extending yarn pushing rods, which are located inside the yarn pushing channel; when the axial yarn pushing claw is in the unpulled state, it is located at the bottom of the cavity inside the upper head changing seat, so that the first yarn clamping plate and the second yarn clamping plate can perform telescopic movement, that is, to clear the telescopic path of the first yarn clamping plate and the second yarn clamping plate.

[0033] As a preferred embodiment of the yarn pushing mechanism, the yarn pushing mechanism also includes a yarn pushing piston cylinder; the yarn pushing piston cylinder is located inside the machine head, and the yarn pushing piston chamber is located inside the yarn pushing piston cylinder.

[0034] Explanation of the yarn pushing principle: The air supply point of the yarn pushing mechanism is located between the bottom of the yarn pushing piston chamber and the piston part of the yarn pushing piston rod, or directly from the bottom of the yarn pushing piston chamber; when the compressed air is connected, the yarn pushing piston rod can drive the axial yarn pushing claw forward along the axis of the machine head under the action of the compressed air to push the transition yarn ring down the upper head changing seat and compress the yarn pushing elastic element at the same time; when the compressed air is disconnected, the yarn pushing piston rod can drive the axial yarn pushing claw back to the unpushed state under the action of the yarn pushing elastic element, that is, back to the bottom of the cavity of the upper head changing seat.

[0035] Furthermore, when the yarn clamping mechanism and the telescopic claw mechanism are on the same radial direction, a bidirectional integrated telescopic drive mechanism is used to drive the yarn clamping plate and the telescopic claw. The bidirectional integrated telescopic drive mechanism includes a bidirectional integrated telescopic cylinder, which is provided with a yarn clamping piston chamber and a telescopic claw piston chamber. The yarn clamping piston rod is located in the yarn clamping piston chamber, and the telescopic piston rod is located in the telescopic claw piston chamber.

[0036] Furthermore, the machine head is provided with a drive air passage and / or drive air pipe, which is used to provide compressed air for driving the yarn clamping mechanism, telescopic claw mechanism, and yarn pushing mechanism.

[0037] Furthermore, at least one yarn-breaking blade is provided on the outer edge of the yarn-pushing channel of the upper head changing seat. When changing the head, the yarn-breaking blade can automatically cut the connection between the upper head changing seat and the slow-pulling traction mechanism or the connection between the empty bobbin head and the full bobbin head by rotating the machine head.

[0038] The control method corresponding to the aforementioned yarn-changing mechanism with intermediate yarn clamping and radial telescopic claws is as follows:

[0039] A yarn-changing mechanism without cutting, featuring a central yarn clamp and radial telescopic claws, characterized by the following operating states:

[0040] With the yarn clamping state open, the first and second yarn clamping plates move toward the direction closer to the central axis of the machine head to close the yarn clamping; at the same time, the first and second telescopic claws open radially onto the yarn to be wound; at this time, the axial yarn pushing claw is in the unpushed state, that is, it is located at the bottom of the cavity of the upper head changing seat to make way for the yarn clamping path.

[0041] In the retracted yarn pushing state, the first and second yarn clamping plates move away from the central axis of the machine head to clear the yarn pushing path; at the same time, the first and second telescopic claws retract radially to release the transition yarn loop; simultaneously or sequentially, the axial yarn pushing claws move forward along the axis of the machine head to push the transition yarn loop down the upper head changing seat.

[0042] Beneficial technical effects:

[0043] 1. The yarn-changing mechanism and control method with intermediate yarn clamping and radial telescopic claw provided in this application can improve the traditional method of hooking yarn from the outer circumference of the machine head to clamping yarn from the inside of the upper head seat by setting a yarn pushing channel and a yarn clamping mechanism on the upper head seat. This is beneficial to improving the efficiency of the upper head changing and reducing the number of transition yarns.

[0044] 2. The yarn-changing mechanism and control method for non-cutting yarn with intermediate yarn clamping and radial telescopic claw provided in this application improves the efficiency of yarn changing and ensures that the yarn pushing mechanism can smoothly push out the transition yarn by setting a telescopic claw mechanism on the upper changing seat and through the opening and closing movement of the telescopic claw. Furthermore, the telescopic claw mechanism disclosed in this application has a telescopic piston rod directly connected to the telescopic claw, and the extension and retraction directions of the piston rod and the telescopic claw coincide. Compared with the telescopic claw disclosed in the prior art (application publication number CN118545903 A), it has the technical advantages of fast response speed and high execution efficiency.

[0045] 3. The yarn-changing mechanism and control method with intermediate yarn clamp and radial telescopic claw provided in this application can automatically cut the connection between the upper head changing seat and the slow pull traction mechanism or between the empty bobbin head and the full bobbin head during the upper head changing by setting a yarn-breaking blade on the upper head changing seat, thus making the automatic upper head changing and bobbin unloading of the drawing machine possible.

[0046] 4. The yarn-changing mechanism and control method with intermediate yarn clamping and radial telescopic claw provided in this application can not only automatically and efficiently complete the yarn-changing work through the cooperation of the yarn clamping mechanism, telescopic claw mechanism and yarn pushing mechanism, but also automatically recycle the transition yarn formed during the yarn-changing process through the yarn pushing mechanism.

[0047] The technical solution and technical effects of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0048] Figure 1 : 3D diagram of the open yarn clamping state;

[0049] Figure 2 Front view of the yarn clamping state;

[0050] Figure 3 : 3D view of the state before the yarn is pushed back during shrinkage;

[0051] Figure 4 Front view of the un-pushed yarn state after shrinkage;

[0052] Figure 5 : 3D diagram of the yarn shrinkage and pushing state;

[0053] Figure 6 Front view of the yarn pushing state during retraction;

[0054] Figure 7 : Schematic diagram of the upper head replacement structure;

[0055] Figure 8 Schematic diagram of the yarn clamping mechanism;

[0056] Figure 9 Schematic diagram of the telescopic claw mechanism;

[0057] Figure 10 Schematic diagram of the yarn pushing mechanism;

[0058] Figure 11 Schematic diagram of rotary drum and machine head structure;

[0059] Figure 12 Schematic diagram of the bidirectional integrated telescopic drive mechanism;

[0060] Figure 13 : Schematic diagram of the yarn breaking process;

[0061] Icon description:

[0062] 1- Machine head, 11- Yarn pusher piston chamber;

[0063] 2-Upper head changing seat, 21-Inner cavity of upper head changing seat, 22-Yarn pushing channel;

[0064] 3- Yarn clamping mechanism;

[0065] 31-First yarn clamping plate, 32-First yarn clamping drive mechanism, 33-Second yarn clamping plate, 34-Second yarn clamping drive mechanism;

[0066] 321- Yarn clamping piston cylinder, 322- Yarn clamping piston rod, 323- Yarn clamping cylinder head, 324- Yarn clamping elastic element;

[0067] 4- Telescopic claw mechanism;

[0068] 41-First telescopic claw, 42-First telescopic drive mechanism, 43-Second telescopic claw, 44-Second telescopic drive mechanism;

[0069] 421-Telescopic piston cylinder, 422-Telescopic piston rod, 423-Telescopic cylinder head, 424-Telescopic elastic element;

[0070] 411 - Threaded surface, 412 - Fixing rod groove, 413 - Fixing rod;

[0071] 5- Yarn pushing mechanism;

[0072] 51-Pushing yarn piston rod, 52-Axial pushing yarn claw, 53-Pushing yarn elastic element, 54-Pushing yarn piston chamber cover, 55-Pushing yarn piston cylinder;

[0073] 521 - Yarn pusher rod, 522 - Yarn pusher disc;

[0074] 6-Bidirectional integrated telescopic drive mechanism, 61-Bidirectional integrated telescopic cylinder, 62-Yarn clamping piston chamber, 63-Telescopic claw piston chamber;

[0075] 7- Yarn-breaking blade. Detailed Implementation

[0076] Directional convention: The direction of the upper head changing seat of the machine head is the forward direction, and the opposite direction, that is, the direction of the main body of the wire drawing machine, is the backward direction.

[0077] In order to provide a clear and complete explanation of the technical solution of this application, the basic structure and functions of the wire drawing machine will be briefly introduced first.

[0078] Existing yarn drawing machines generally include a frame, a head turntable and its drive mechanism, several heads and their drive mechanisms, a slow-pull traction mechanism, a yarn pusher mechanism, and an automatic yarn cutting mechanism. Among these:

[0079] The machine head turntable and its drive mechanism are mounted on the machine frame. The machine head turntable can rotate under the action of the turntable drive mechanism to realize the alternation of working machine head and standby machine head;

[0080] The head and its drive mechanism are mounted on the head turntable. The head can rotate freely under the action of its drive mechanism and can also rotate synchronously with the head turntable. When rotating freely, the wire is drawn and wound into balls or cakes. When rotating synchronously, the workstations are changed.

[0081] The slow-pull traction mechanism is mounted on the frame and is used to pull the yarn during head changes so that the yarn loading loop and yarn loading hook can capture the yarn.

[0082] For details regarding the machine head turntable, machine head spindle, and slow-pull traction mechanism, please refer to: Slow-pull automatic online yarn feeding mechanism with no cutting required, publication number CN211141896U;

[0083] The pusher screw mechanism is mounted on the frame and is used to adjust the position of the yarn during head changing, such as when it is in the head changing seat or the drawing and winding part of the head spindle; please refer to: A multi-stroke pusher screw mechanism for a drawing machine, announcement number: CN222274392U;

[0084] The automatic yarn cutting mechanism is used to cut the fiberglass yarn connection between the yarn ball and the upper changing head seat or upper yarn ring. When the fiberglass yarn is pushed or pulled from the upper changing head seat or upper yarn ring to the winding position, a connection will be formed between the upper changing head seat or upper yarn ring and the yarn ball. Without cutting, the automatic unloading of the yarn ball cannot be completed. Please refer to: Chinese Patent: An Automatic Yarn Cutting Mechanism for a Fiber Drawing Machine, Announcement No.: CN222138959U.

[0085] The upper head changing mechanism and its control method for which this application seeks patent protection are technological innovations in the field of drawing machine heads, mainly used to improve the efficiency and quality of upper head changing and minimize the amount of transition yarn.

[0086] Please see Figure 7 The yarn-changing mechanism for non-cutting yarn with intermediate yarn clamping and radial telescopic claw disclosed in this application includes an upper yarn changing seat 2, an upper yarn changing seat cavity 21 is provided on the upper yarn changing seat 2, and a plurality of yarn pushing channels 22 are provided on the side wall of the upper yarn changing seat cavity 21; the number of yarn pushing channels 22 is at least two and they are arranged opposite to each other so that the glass fiber yarn can pass through the middle of the upper yarn changing seat 2 and be clamped by the yarn clamping mechanism 3.

[0087] Please see Figure 11 The upper head changing seat 2 is fixedly mounted on the machine head 1 to assist the machine head 1 in automatically completing the upper head changing work and the automatic recycling of the transition yarn loops.

[0088] Please see Figures 1 to 6 The yarn-changing mechanism for non-cutting yarn with intermediate yarn clamping and radial telescopic claw disclosed in this application also includes a yarn clamping mechanism 3, a telescopic claw mechanism 4, and a yarn pushing mechanism 5.

[0089] The yarn clamping mechanism 3 includes a first yarn clamping plate 31, a first yarn clamping drive mechanism 32, a second yarn clamping plate 33, and a second yarn clamping drive mechanism 34. The first yarn clamping drive mechanism 32 and the second yarn clamping drive mechanism 34 are both located in the inner cavity 21 of the upper head changing seat. The first yarn clamping plate 31 and the second yarn clamping plate 33 are respectively connected to the first yarn clamping drive mechanism 32 and the second yarn clamping drive mechanism 34. The first yarn clamping plate 31 and the second yarn clamping plate 33 can close and separate under the action of the first yarn clamping drive mechanism 32 and the second yarn clamping drive mechanism 34 to complete the yarn clamping and return actions.

[0090] The telescopic claw mechanism 4 includes a first telescopic claw 41, a first telescopic drive mechanism 42, a second telescopic claw 43, and a second telescopic drive mechanism 44. The first telescopic claw 41 and the second telescopic claw 43 are both disposed on the outer circumference of the upper head-changing seat 2, and the first telescopic drive mechanism 42 and the second telescopic drive mechanism 44 are both disposed in the inner cavity 21 of the upper head-changing seat. The first telescopic claw 41 and the second telescopic claw 43 are respectively connected to the first telescopic drive mechanism 42 and the second telescopic drive mechanism 44. The first telescopic claw 41 and the second telescopic claw 43 can open and retract under the action of the first telescopic drive mechanism 42 and the second telescopic drive mechanism 44 to complete the opening and returning actions.

[0091] When the telescopic claw opens, it facilitates the winding of the yarn onto the head; when the telescopic claw retracts, it facilitates the smooth pushing of the yarn (pushing the transition yarn loop down the upper head change seat 2). The telescopic claw mechanism 4 can improve the efficiency of the upper head change and ensure that the yarn pushing mechanism can smoothly push out the transition yarn.

[0092] The yarn pushing mechanism 5 includes several axial yarn pushing claws 52, which are arranged in the yarn pushing channel 22 and can push the yarn forward along the axis of the machine head 1 and return to their original position under the action of its driving mechanism.

[0093] Figure 1 and Figure 2 The diagram shows the open clamping state of the yarn-changing mechanism on the yarn-free machine head. At this time, the axial pushing claw 52 of the yarn pushing mechanism 5 is in the initial unpushed position, that is, at the bottom of the cavity 21 of the upper head changing seat, so as to allow the telescopic movement path of the first clamping plate 31 and the second clamping plate 33 to be opened. The first clamping plate 31 and the second clamping plate 33 close together under the action of the first clamping drive mechanism 32 and the second clamping drive mechanism 34 respectively to clamp the glass fiber yarn. At the same time, the first telescopic claw 41 and the second telescopic claw 43 open radially under the action of the first telescopic drive mechanism 42 and the second telescopic drive mechanism 44 to facilitate the winding of the yarn head when the machine head rotates.

[0094] Figure 3 and Figure 4The diagram shows the retracted, non-pushing state of the yarn-changing mechanism on the non-cut yarn. At this time, the axial pushing claw 52 of the pushing mechanism 5 is still in the initial unpushed position, that is, at the bottom of the cavity 21 of the upper changing seat. The first clamping plate 31 and the second clamping plate 33 are separated from each other under the action of the first clamping drive mechanism 32 and the second clamping drive mechanism 34 to make way for the pushing path. At the same time, the first telescopic claw 41 and the second telescopic claw 43 are retracted radially under the action of the first telescopic drive mechanism 42 and the second telescopic drive mechanism 44 to reduce the resistance of the transition yarn loop and facilitate the axial pushing claw 52 to push the yarn axially.

[0095] Figure 5 and Figure 6 The diagram shows the retracted pushing state of the yarn changing mechanism on the non-cut yarn. At this time, the first yarn clamping plate 31 and the second yarn clamping plate 33 separate to make way for the pushing path. The first telescopic claw 41 and the second telescopic claw 43 retract to reduce the pushing resistance. The axial pushing claw 52 pushes the yarn forward along the axis of the machine head 1 under the action of its driving mechanism, pushing the transition yarn ring down the upper changing seat 2.

[0096] The aforementioned yarn pushing action lags behind the first yarn clamping plate 31, the second yarn clamping plate 32, the separation and return action, and the retraction and return action of the first telescopic claw 41 and the second telescopic claw 43. In specific applications, the yarn pushing action can also be performed synchronously with the separation and return action and the retraction and return action. Since there is a distance between the axial yarn pushing claw 52 and the first yarn clamping plate 31 and the second yarn clamping plate 32 in the machine head axis, and the first telescopic claw 41 and the second telescopic claw 43 can push the yarn smoothly by slightly loosening the transition yarn loop, the two yarn clamping plates will not obstruct the axial yarn pushing claw 52 when performed synchronously, and can smoothly push the transition yarn loop down the upper head changing seat 2.

[0097] The working principles of the yarn clamping mechanism 3, the telescopic claw mechanism 4, and the yarn pushing mechanism 5 will be explained in detail below.

[0098] Please see Figure 8 The first yarn clamping drive mechanism 32 and the second yarn clamping drive mechanism 34 have the same structure, both including: a yarn clamping piston cylinder 321, a yarn clamping piston rod 322, a yarn clamping cylinder cover 323, and a yarn clamping elastic element 324.

[0099] Two yarn clamping piston cylinders 321 are both located in the inner cavity 21 of the upper head changing seat and are arranged opposite each other; the yarn clamping cylinder cover 323 is located at the opening of the piston cavity of the yarn clamping piston cylinder 321; the piston parts of the two yarn clamping piston rods 322 are both located in the piston cavity of the corresponding yarn clamping piston cylinder 321, and the connecting rod part of the yarn clamping piston rod 322 extends out of the piston cavity of the yarn clamping piston cylinder 321 through the yarn clamping cylinder cover 323; the first yarn clamping plate 31 and the second yarn clamping plate 33 are respectively connected to the extended end of the connecting rod part of the corresponding yarn clamping piston rod 322; the yarn clamping elastic element 324 is located in the piston cavity of the yarn clamping piston cylinder 321 and its two ends act on the piston part of the yarn clamping piston rod 322 and the bottom of the piston cavity of the yarn clamping piston cylinder 321, respectively.

[0100] The air supply points of the first yarn clamping drive mechanism 32 and the second yarn clamping drive mechanism 34 are both located between the cylinder head 323 and the piston portion of the yarn clamping piston rod 322. Therefore, when compressed air is supplied, the first yarn clamping drive mechanism 32 and the second yarn clamping drive mechanism 34 can drive the first yarn clamping plate 31 and the second yarn clamping plate 33 to separate. After the compressed air is disconnected, the first yarn clamping drive mechanism 32 and the second yarn clamping drive mechanism 34 can drive the first yarn clamping plate 31 and the second yarn clamping plate 33 to close together under the action of their respective yarn clamping elastic elements 324. When the two yarn clamping plates separate, they clear the yarn pushing path; when they close, they clamp the fiberglass yarn and allow it to be fed onto the machine head through rotation.

[0101] Please see Figure 9 The first telescopic drive mechanism 42 and the second telescopic drive mechanism 44 have the same structure, both including: telescopic piston cylinder 421, telescopic piston rod 422, telescopic cylinder head 423, and elastic member 424.

[0102] Two telescopic piston cylinders 421 are both located in the inner cavity 21 of the upper head changing seat and are arranged opposite each other. The telescopic cylinder cover 423 is located at the opening of the piston chamber of the telescopic piston cylinder 421. The piston parts of the two telescopic piston rods 422 are both located in the piston chamber of the corresponding telescopic piston cylinder 421, and the connecting rod part of the yarn clamping piston rod 322 extends out of the piston chamber of the telescopic piston cylinder 421 through the telescopic cylinder cover 423. The first telescopic claw 41 and the second telescopic claw 43 are respectively connected to the extended end of the connecting rod part of the corresponding telescopic piston rod 422. The telescopic elastic element 424 is located in the piston chamber of the telescopic piston cylinder 421 and its two ends act on the piston part of the telescopic piston rod 422 and the bottom of the piston chamber of the telescopic piston cylinder 421, respectively.

[0103] The air supply points of the first telescopic drive mechanism 42 and the second telescopic drive mechanism 44 are both located between the telescopic cylinder head 423 and the piston portion of the telescopic piston rod 422. Therefore, when compressed air is supplied, the first telescopic drive mechanism 42 and the second telescopic drive mechanism 44 can drive the first telescopic claw 41 and the second telescopic claw 43 to retract radially. After the compressed air is disconnected, the first telescopic drive mechanism 42 and the second telescopic drive mechanism 44 can drive the first telescopic claw 41 and the second telescopic claw 43 to open radially under the action of their respective telescopic elastic elements 424. When the two telescopic claws are open, it facilitates the feeding of the yarn; when they retract, they loosen the transition yarn loop to reduce the resistance to pushing the yarn.

[0104] Please refer to Chinese Patent Publication No. CN 118545903 A. The radial telescopic function in this patent is achieved through a telescopic claw piston rod located within the machine head. The telescopic claw piston rod extends and retracts along the machine head axis, thereby synchronously extending and retracting the telescopic claw drive seat. The telescopic claw drive seat then drives the telescopic claw to extend and retract radially through a bevel engagement with the telescopic claw. As can be seen from the implementation principle, the telescopic claw mechanism disclosed in this patent suffers from a slow response speed due to its long transmission chain. While it can meet the practical application requirements of small and medium-sized machine heads, a more efficient telescopic claw mechanism needs to be developed for larger machine heads. The telescopic claw mechanism 4 used in this application, because the telescopic piston rod 421 directly acts on the telescopic claw and the extension and retraction direction of the piston rod is consistent with the radial extension and retraction direction of the telescopic claw, has a shorter transmission chain, higher execution efficiency, and faster response speed, thus meeting the application requirements of large machine heads.

[0105] In a modified embodiment, both the first telescopic claw 41 and the second telescopic claw 43 are provided with a threaded surface 411 and a fixing rod groove 412; a fixing rod 413 is provided in each fixing rod groove 412. When the telescopic claw moves open, the fixing rod 413 enters the fixing rod groove 412, at which time the threaded surface 411 protrudes from the fixing rod 413 to facilitate efficient yarn winding; when the telescopic claw moves back to its original position, the fixing rod 413 protrudes from the fixing rod groove 412, thereby enabling the yarn to be peeled off from the threaded surface 411 and the transition yarn loop to be supported on the fixing rod 413 for easy yarn pushing.

[0106] Unlike existing automatic push-out mechanisms for head changing without cutting, which use a cross arrangement of telescopic and fixed claws (see publication number CN 118545903 A), the existing fixed claws peel and support the fiberglass yarn from the toothed or threaded surface from both sides of the telescopic claw. Since the fiberglass yarn contains a certain amount of sizing agent during drawing and winding, it has a certain adhesion to the toothed or threaded surface. Peeling and supporting the fiberglass yarn from both sides of the telescopic claw may cause it to break, thus affecting the overall yarn pushing and recycling process. The telescopic claw mechanism used in this application has a fixed rod 413 located within the threaded surface of the telescopic claw. This changes the force application from both sides of the telescopic claw to the middle of the toothed or threaded surface, resulting in more uniform force application and dividing the threaded surface into multiple segments. This avoids excessively long adhesion lengths of the fiberglass yarn on the threaded surface, thus solving the problem of fiberglass yarn breakage easily caused by existing fixed claws.

[0107] Please see Figure 10 and Figure 11 The yarn pushing mechanism 5 includes a yarn pushing piston rod 51, an axial yarn pushing claw 52, ​​a yarn pushing elastic element 53, and a yarn pushing piston chamber cover 54.

[0108] The machine head 1 is provided with a yarn pushing piston chamber 11; the yarn pushing piston chamber cover 54 is provided at the opening of the yarn pushing piston chamber 11, the piston part of the yarn pushing piston rod 51 is provided in the yarn pushing piston chamber 11 and the connecting rod part extends out of the yarn pushing piston chamber cover 54; the axial yarn pushing claw 52 is provided on the extended end of the connecting rod part of the yarn pushing piston rod 51; the yarn pushing elastic element 53 is provided in the yarn pushing piston chamber 11 and its two ends act on the yarn pushing piston chamber cover 54 and the piston part of the yarn pushing piston rod 51 respectively.

[0109] The axial yarn pusher 52 includes a yarn pusher disc 522 and several radially extending yarn pusher rods 521. The yarn pusher rods 521 are fixedly connected to the yarn pusher disc 522 or integrally formed with the yarn pusher disc 522. The yarn pusher rods 521 are arranged in the yarn pusher channel 22. When the axial yarn pusher 52 is in the unpulled state, it is located at the bottom of the cavity of the upper head changing seat cavity 21, so that the first yarn clamping plate 31 and the second yarn clamping plate 33 can perform telescopic movement.

[0110] The air supply point of the yarn pushing mechanism 5 is located between the bottom of the yarn pushing piston chamber 11 and the piston part of the yarn pushing piston rod 51, or directly from the bottom of the yarn pushing piston chamber 11. When the compressed air is connected, the yarn pushing piston rod 51 can drive the axial yarn pushing claw 52 to push forward along the axis of the machine head 1 under the action of the compressed air to push the transition yarn ring down the upper head changing seat 2 and compress the yarn pushing elastic element 53 at the same time. When the compressed air is disconnected, the yarn pushing piston rod 51 can drive the axial yarn pushing claw 52 to return to the unpushed state under the action of the yarn pushing elastic element 53, that is, return to the bottom of the cavity of the upper head changing seat 2.

[0111] In one modified embodiment of this application, the yarn pushing mechanism 5 further includes a yarn pushing piston cylinder 55; the yarn pushing piston cylinder 55 is disposed inside the machine head 1, and the yarn pushing piston chamber 11 is disposed inside the yarn pushing piston cylinder 55. In actual implementation, the yarn pushing piston chamber 11 can be flexibly disposed directly inside the machine head 1 or an independent yarn pushing piston cylinder 55 can be used, depending on the actual situation of the machine head 1.

[0112] Please see Figure 12 In another modified embodiment of this application, when the yarn clamping mechanism 3 and the telescopic claw mechanism 4 are on the same radial direction, a bidirectional integrated telescopic drive mechanism can also be used to drive the yarn clamping plate and the telescopic claw. The bidirectional integrated telescopic drive mechanism 6 includes a bidirectional integrated telescopic cylinder 61, which contains a yarn clamping piston chamber 62 and a telescopic claw piston chamber 63. The connection and cooperation method of the yarn clamping piston rod 322 and the yarn clamping elastic element 324 is similar to the aforementioned description of the yarn clamping mechanism 3, and will not be repeated here. The connection and cooperation method of the telescopic piston rod 422 and the elastic element 424 is similar to the aforementioned description of the telescopic claw mechanism 4, and will not be repeated here.

[0113] The machine head 1 is equipped with a drive air passage and / or drive air pipe, which is used to provide compressed air for driving the yarn clamping mechanism 3, the telescopic claw mechanism 4, and the yarn pushing mechanism 5.

[0114] The following describes the drawing process of the yarn-changing mechanism for the non-cutting yarn with intermediate yarn clamping and radial telescopic claws.

[0115] STEP01 Initial Operation:

[0116] When the machine head is being fed, compressed air is first introduced, and the first clamping plate 31 and the second clamping plate 33 move away from the central axis of the machine head 1 and separate from each other; at the same time, the first telescopic claw 41 and the second telescopic claw 43 retract radially back to their original positions.

[0117] At this time, the yarn guide or yarn guide robot will pull the fiberglass yarn through the yarn push channel 22 on the machine head 1 to the slow pull mechanism;

[0118] Then the compressed air is disconnected, and the first clamping plate 31 and the second clamping plate 33 move toward the central axis of the machine head 1 and close together to clamp the yarn. At the same time, the first telescopic claw 41 and the second telescopic claw 43 open radially to wind the yarn.

[0119] The machine head 1 begins to rotate, winding the fiberglass yarn onto the telescopic claw of the upper head changer 2. Simultaneously, the yarn-breaking blade 7 on the upper head changer 2 cuts the fiberglass yarn connection between the slow-pull traction mechanism and the upper head changer 2 (see [link]). Figure 13 );

[0120] The pusher screw mechanism pushes or pulls the fiberglass yarn to the winding section of the machine head 1 to start normal winding production;

[0121] STEP02 Head Replacement Operation:

[0122] Once the current machine head is full, the pusher screw mechanism will push the yarn to the position of the upper head changing seat 2, and the full-bore machine head and the empty-bore machine head will begin to switch positions;

[0123] At this time, the first telescopic claw 41 and the second telescopic claw 43 of the empty tube head are in the open state, and the fiberglass yarn is wrapped around the telescopic claw of the empty tube head;

[0124] The pusher mechanism pushes the fiberglass yarn to the winding section of the empty drum head to begin normal drawing and winding, and the head-changing action is completed.

[0125] STEP03 Yarn Pushing Operation:

[0126] After the rotation position is changed, the full-boiler head moves to the standby station;

[0127] Compressed air is supplied to separate the first yarn clamping plate 31 and the second yarn clamping plate 33 from each other; at the same time, the first telescopic claw 41 and the second telescopic claw 43 retract back to their original positions; synchronously or sequentially, the axial pusher claw 52 pushes forward along the axis of the machine head 1 to push the transition yarn ring down to the upper head changing seat 2 for recycling; then the compressed air is disconnected, causing the pusher mechanism 5, the clamping mechanism 3, and the telescopic claw mechanism 4 to return to their original positions respectively.

[0128] The unloading robot automatically removes the yarn bundles to proceed to the next process.

[0129] The above description describes one of the feasible head-changing processes for a non-cutting yarn head-changing mechanism with intermediate yarn clamping and radial telescopic claws. Other implementation schemes can also be adopted in specific applications. As can be seen from the above head-changing steps, the non-cutting yarn head-changing mechanism with intermediate yarn clamping and radial telescopic claws disclosed in this application, by setting a yarn pushing channel 22 and a yarn clamping mechanism 3 on the head-changing seat, can improve the traditional method of hooking the yarn from the outer circumference of the machine head to clamping the yarn from inside the head-changing seat 2, which is beneficial to improving the head-changing efficiency and reducing the number of transition yarns. By setting a telescopic claw mechanism 4 on the head-changing seat 2, the head-changing efficiency can be improved through the opening and closing movement of the telescopic claws, and the yarn pushing mechanism 5 can be smoothly pushed out of the transition yarn. Through the cooperation of the yarn clamping mechanism 3, the telescopic claw mechanism 4, and the yarn pushing mechanism 5, the head-changing work can be completed automatically and efficiently, and the transition yarn formed during the head-changing process can be automatically recycled. By setting a yarn-breaking blade and a yarn clamping mechanism on the head-changing seat, the traction connection can be cut off at the moment of completion of the head-changing, solving the problem of the machine head spinning yarn.

[0130] As can be seen from the above description of the yarn changing step, the control method of the yarn-changing mechanism with intermediate yarn clamp and radial telescopic claw involved in this application includes the following two characteristic working states:

[0131] With the yarn clamping state open, the first yarn clamping plate 31 and the second yarn clamping plate 33 move toward the direction close to the central axis of the machine head 1 to close the yarn clamping state; at the same time, the first telescopic claw 41 and the second telescopic claw 43 open radially to the top of the yarn to be wound; at this time, the axial yarn pushing claw 52 is in the unpushed state, that is, it is located at the bottom of the cavity 21 of the upper head changing seat to make way for the yarn clamping path.

[0132] In the retracted yarn pushing state, the first yarn clamping plate 31 and the second yarn clamping plate 33 move away from the central axis of the machine head 1 to clear the yarn pushing path; at the same time, the first telescopic claw 41 and the second telescopic claw 43 retract radially to loosen the transition yarn loop; simultaneously or sequentially, the axial yarn pushing claw 52 moves forward along the axis of the machine head 1 to push the transition yarn loop down the upper head changing seat 2.

[0133] The technical solutions and effects of this application have been described in detail above with reference to the accompanying drawings and specific embodiments. It should be noted that those skilled in the art can develop other embodiments based on this. Any simple modifications and equivalent substitutions that do not depart from the innovative concept of this application are covered by this application and fall within the protection scope of this patent.

Claims

1. A yarn-changing mechanism for yarn cutting without cutting, comprising an upper changing seat (2); the upper changing seat (2) is provided with an upper changing seat cavity (21), and at least two yarn pushing channels (22) are provided on the side wall of the upper changing seat cavity (21). Its features are: It also includes a yarn clamping mechanism (3); The yarn clamping mechanism (3) includes a first yarn clamping plate (31), a first yarn clamping drive mechanism (32), a second yarn clamping plate (33), and a second yarn clamping drive mechanism (34). The first yarn clamping drive mechanism (32) and the second yarn clamping drive mechanism (34) are both located in the inner cavity (21) of the upper head changing seat. The first yarn clamping plate (31) and the second yarn clamping plate (33) are respectively connected to the first yarn clamping drive mechanism (32) and the second yarn clamping drive mechanism (34). The first clamping plate (31) and the second clamping plate (33) can close and separate to complete clamping and repositioning; The first yarn clamping drive mechanism (32) and the second yarn clamping drive mechanism (34) have the same structure, both including: a yarn clamping piston cylinder (321) and a yarn clamping piston rod (322). Both yarn clamping piston cylinders (321) are disposed in the inner cavity (21) of the upper head changing seat and are disposed opposite to each other. The piston parts of the two yarn clamping piston rods (322) are disposed in the piston chamber of the corresponding yarn clamping piston cylinder (321) and the connecting rod parts extend out of the piston chamber of the yarn clamping piston cylinder (321). The first yarn clamping plate (31) and the second yarn clamping plate (33) are respectively connected to the extended end of the connecting rod part of the corresponding yarn clamping piston rod (322).

2. The yarn-changing mechanism with intermediate yarn clamp and radial telescopic claw according to claim 1, characterized in that: The first yarn clamping drive mechanism (32) and the second yarn clamping drive mechanism (34) further include: a yarn clamping cylinder cover (323) and a yarn clamping elastic element (324). The yarn clamping cylinder cover (323) is located at the opening of the piston chamber of the yarn clamping piston cylinder (321), and the connecting rod portion of the yarn clamping piston rod (322) extends out of the piston chamber of the yarn clamping piston cylinder (321) through the yarn clamping cylinder cover (323). The yarn clamping elastic element (324) is disposed in the piston chamber of the yarn clamping piston cylinder (321) and its two ends act on the piston part of the yarn clamping piston rod (322) and the bottom of the piston chamber of the yarn clamping piston cylinder (321), respectively.

3. The yarn-changing mechanism with intermediate yarn clamp and radial telescopic claw according to claim 1, characterized in that: It also includes a telescopic claw mechanism (4); The telescopic claw mechanism (4) includes a first telescopic claw (41), a first telescopic drive mechanism (42), a second telescopic claw (43), and a second telescopic drive mechanism (44). The first telescopic claw (41) and the second telescopic claw (43) are both disposed on the outer circumference of the upper head changing seat (2), and the first telescopic drive mechanism (42) and the second telescopic drive mechanism (44) are both disposed in the inner cavity (21) of the upper head changing seat. The first telescopic claw (41) and the second telescopic claw (43) are respectively connected to the first telescopic drive mechanism (42) and the second telescopic drive mechanism (44). The first telescopic claw (41) and the second telescopic claw (43) can open and retract to complete the yarn feeding and return.

4. The yarn-changing mechanism with intermediate yarn clamp and radial telescopic claw according to claim 3, characterized in that: The first telescopic drive mechanism (42) and the second telescopic drive mechanism (44) have the same structure, both including: telescopic piston cylinder (421) and telescopic piston rod (422). Both telescopic piston cylinders (421) are disposed in the inner cavity (21) of the upper head seat and are disposed opposite to each other. The piston parts of the two telescopic piston rods (422) are disposed in the piston chamber of the corresponding telescopic piston cylinder (421). The first telescopic claw (41) and the second telescopic claw (43) are respectively connected to the connecting rod part of the corresponding telescopic piston rod (422).

5. The yarn-changing mechanism with intermediate yarn clamp and radial telescopic claw according to claim 4, characterized in that: The first telescopic drive mechanism (42) and the second telescopic drive mechanism (44) further include: telescopic cylinder head (423) and telescopic elastic element (424). The telescopic cylinder cover (423) is disposed at the opening of the piston chamber of the telescopic piston cylinder (421), and the connecting rod portion of the telescopic piston rod (422) extends through the telescopic cylinder cover (423) and out of the piston chamber of the telescopic piston cylinder (421). The telescopic elastic element (424) is disposed in the piston chamber of the telescopic piston cylinder (421) and its two ends act on the piston part of the telescopic piston rod (422) and the bottom of the piston chamber of the telescopic piston cylinder (421), respectively.

6. The yarn-changing mechanism with intermediate yarn clamp and radial telescopic claw according to claim 3, characterized in that: When the yarn clamping mechanism (3) and the telescopic claw mechanism (4) are on the same radial direction, the bidirectional integrated telescopic drive mechanism (6) is used to drive the yarn clamping plate and the telescopic claw. The bidirectional integrated telescopic drive mechanism (6) includes a bidirectional integrated telescopic cylinder (61), and the bidirectional integrated telescopic cylinder (61) is provided with a yarn clamping piston chamber (62) and a telescopic claw piston chamber (63).

7. The yarn-changing mechanism with intermediate yarn clamp and radial telescopic claw according to claim 3, characterized in that: Both the first telescopic claw (41) and the second telescopic claw (43) are provided with threaded surfaces (411) and fixing rod grooves (412); fixing rods (413) are provided in the fixing rod grooves (412).

8. The yarn-changing mechanism with intermediate yarn clamp and radial telescopic claw according to claim 1, characterized in that: It also includes the machine head (1) and the yarn pushing mechanism (5); The upper head changing seat (2) is fixedly installed on the machine head (1), and the machine head (1) is provided with a yarn pushing piston chamber (11). The yarn pushing mechanism (5) includes a yarn pushing piston rod (51), an axial yarn pushing claw (52), a yarn pushing elastic element (53), and a yarn pushing piston chamber cover (54). The yarn pushing piston chamber cover (54) is disposed at the opening of the yarn pushing piston chamber (11), the piston part of the yarn pushing piston rod (51) is disposed in the yarn pushing piston chamber (11) and the connecting rod part extends out of the yarn pushing piston chamber cover (54), the axial yarn pushing claw (52) is disposed on the extended end of the connecting rod part of the yarn pushing piston rod (51), and the yarn pushing elastic element (53) is disposed in the yarn pushing piston chamber (11) and its two ends act on the yarn pushing piston chamber cover (54) and the piston part of the yarn pushing piston rod (51) respectively; The axial pusher claw (52) includes a plurality of radially extending pusher rods (521), which are disposed within the pusher channel (22); When the axial yarn pusher (52) is in the unpulled state, it is located at the bottom of the cavity of the upper head changing seat (21) so that the first yarn clamping plate (31) and the second yarn clamping plate (33) can perform telescopic movements.

9. The yarn-changing mechanism with intermediate yarn clamp and radial telescopic claw according to claim 8, characterized in that: The yarn pushing mechanism (5) also includes a yarn pushing piston cylinder (55); The yarn pushing piston cylinder (55) is located inside the machine head (1), and the yarn pushing piston chamber (11) is located inside the yarn pushing piston cylinder (55).

10. The yarn-changing mechanism with intermediate yarn clamp and radial telescopic claw according to claim 1, characterized in that: A yarn-breaking blade (7) is provided on the outer edge of the yarn-pushing channel (22) of the upper head changing seat (2).

11. A control method for a yarn-changing mechanism without cutting, comprising an intermediate yarn clamp and a radial telescopic claw, applied to the yarn-changing mechanism without cutting as described in claim 1, comprising the following working states: With the yarn clamping state open, the first yarn clamping plate (31) and the second yarn clamping plate (33) move toward the direction close to the central axis of the machine head (1) to close the yarn clamping state; at the same time, the first telescopic claw (41) and the second telescopic claw (43) open radially to wrap around the top of the yarn; at this time, the axial yarn pushing claw (52) is in the unpulled state, that is, it is located at the bottom of the cavity of the upper head changing seat (21) to make way for the yarn clamping path; In the retracted yarn pushing state, the first yarn clamping plate (31) and the second yarn clamping plate (33) move away from the central axis of the machine head (1) to make way for the yarn pushing path; at the same time, the first telescopic claw (41) and the second telescopic claw (43) retract radially to loosen the transition yarn loop; simultaneously or sequentially, the axial yarn pushing claw (52) moves forward along the axis of the machine head (1) to push the transition yarn loop down the upper head changing seat (2).

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