Anti-skid forced telescopic block head changing yarn cutting free mechanism

Abstract

The application belongs to the technical field of glass fiber production, and particularly relates to a forced telescopic block upper head changing yarn cutting-free mechanism with anti-skid function. The forced telescopic block upper head changing yarn cutting-free mechanism comprises a forced telescoping mechanism, the forced telescoping mechanism comprises a telescopic block, a telescopic frame and a telescopic drive head, the telescopic frame is provided with a telescopic cavity, the end of the telescopic frame is provided with a drive head limiting groove, the telescopic block is provided with a toothed part and a drive head matching groove, the telescopic block is hinged in the telescopic cavity, the drive head matching groove and the drive head limiting groove are located at the same end, and the telescopic drive head is arranged in the drive head matching groove and the drive head limiting groove. The application can ensure the smooth pushing out of the head yarn without affecting the upper head changing efficiency.

Description

Technical Field

[0001] This application belongs to the field of glass fiber production technology, specifically relating to a head-changing, yarn-cutting-free mechanism with a forced telescopic block featuring anti-slip properties. 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, has become a pressing need. To address the challenges of increasing the utilization value of waste yarn from the top yarn change and achieving unmanned automation, breakthroughs are needed in cutting and removing yarn remaining on the top yarn ring. This will enable upgrades to existing equipment, achieving automated production operations that push out the entire loop of waste yarn from the top yarn change without human intervention. This will improve the overall performance and efficiency of existing yarn drawing machines, significantly enhancing the residual value of waste yarn from the top yarn change (hereinafter referred to as machine head yarn) and achieving substantial economic benefits.

[0005] To address the issue of yarn recycling at the drawing head, the applicant proposed a solution using a yarn-pushing transition ring in conjunction with a yarn-pushing piston rod and a centrifugal yarn-pushing rod to push the yarn down from the drawing head for recycling. Please refer to Chinese Patent: Automatic Yarn-Pulling Machine and Control Method for Pushing Out Transition Yarn Without Cutting, Application Publication No. CN 118459081 A.

[0006] Although this patent can automate the recycling of the yarn at the machine head, the following problems still exist: if the yarn winding part on the yarn pushing transition ring is horizontal, the resistance is large and the yarn pushing efficiency is low; if the yarn winding part of the yarn pushing transition ring is tapered, the fiberglass yarn is easy to slip outwards when changing heads, affecting the head changing efficiency. Utility Model Content

[0007] In view of this, this application provides a yarn-cutting-free head-changing mechanism with a forced telescopic block and anti-slip, to solve all or part of the technical problems described in the background section of this application.

[0008] The innovative idea of ​​this application is to set a certain taper at the winding part of the yarn head to facilitate yarn pushing; at the same time, a forced telescopic block is set at the winding part of the yarn head; when changing the yarn head, the telescopic block is extended to facilitate yarn winding and the yarn is pushed; when pushing the yarn, the telescopic block is contracted to facilitate yarn pushing; thus, the efficiency of changing the yarn head is not affected, and the yarn head can be pushed down smoothly from the drawing machine head.

[0009] The solution provided in this application is: A yarn-cutting-free head-changing mechanism with a forced telescopic block and anti-slip features: it includes a forced telescopic mechanism; the forced telescopic mechanism includes a telescopic block, a telescopic frame, and a telescopic drive head; the telescopic frame has a telescopic cavity, and the end of the telescopic frame has a drive head limiting groove; the telescopic block has a toothed portion and a drive head mating groove; the telescopic block is hinged in the telescopic cavity, and the drive head mating groove and the drive head limiting groove are located at the same end; the telescopic drive head is simultaneously disposed in the drive head mating groove and the drive head limiting groove.

[0010] Preferably, the telescopic block is provided with a hinge hole; the telescopic frame is provided with a hinge mating hole; the telescopic block is hinged in the telescopic cavity through the mating of the hinge hole, the hinge mating hole and the hinge shaft.

[0011] Preferably, the drive head mating groove includes an extension section, a rotation section, and a retraction section; the drive head limiting groove is a straight groove; the telescopic drive head can perform linear reciprocating motion within the drive head limiting groove; when the telescopic drive head is located in the extension section, the telescopic block is in an extended state; when the telescopic drive head is located in the retraction section, the telescopic block is in a retracted state; when the telescopic drive head moves within the rotation section, the telescopic block switches between the extension and retraction states.

[0012] Preferably, the telescopic drive head includes a drive crossbar and limiting longitudinal bars located on both sides of the drive crossbar; the drive crossbar is used to cooperate with the drive head's mating groove to complete the telescopic drive of the telescopic block; the limiting longitudinal bars are used to cooperate with the drive head's limiting groove to complete the movement trajectory limitation of the telescopic drive head.

[0013] Preferably, the telescopic frame includes a left frame plate and a right frame plate; a telescopic cavity is defined between the left frame plate and the right frame plate; and the drive head limiting grooves are symmetrically arranged on the left frame plate and the right frame plate respectively.

[0014] Preferably, the forced telescopic mechanism further includes a telescopic block limiting shaft; the telescopic block is provided with a limiting shaft hole; the telescopic frame is provided with a telescopic block limiting groove; the telescopic block limiting shaft is simultaneously provided in the limiting shaft hole and the telescopic block limiting groove.

[0015] Preferably, the forced telescopic mechanism further includes a push-pull linkage; one end of the push-pull linkage is connected to the telescopic drive head, and the other end is used to receive axial driving force.

[0016] Preferably, the anti-slip forced telescopic block head-changing and yarn-cutting-free mechanism further includes a machine head shaft, an upper head-changing seat, a tapered sleeve, a mating shaft sleeve, and a spring sleeve rod; the upper head-changing seat is located at the end of the machine head shaft; the tapered sleeve and the mating shaft sleeve are both sleeved on the machine head shaft and define a driving air chamber between them; the spring sleeve rod is located between the tapered sleeve and the upper head-changing seat; the upper head-changing seat is provided with a telescopic mechanism receiving position and a connecting rod through hole; the telescopic frame is located in the telescopic mechanism receiving position, and the push-pull connecting rod is movably located in the connecting rod through hole; the end of the push-pull connecting rod opposite to the telescopic drive head is movably connected to the tapered sleeve.

[0017] Preferably, the upper head changing seat is provided with a plurality of doffing columns; the plurality of doffing columns are evenly distributed around the head shaft; the angle formed by the outer doffing surface of the doffing column and the axis of the head shaft is greater than or equal to 3°; the telescopic mechanism is accommodated on the doffing column.

[0018] Preferably, the upper head changer is further provided with several yarn pushing channels; the doffing columns and yarn pushing channels are evenly spaced around the head shaft; a yarn pushing piston chamber is also provided in the center of the head shaft. Further, the upper head changer is provided with a central inner cavity; the sidewall of the central inner cavity is divided by the yarn pushing channels to form several doffing columns; the cross-section of the doffing columns has a fan-shaped structure.

[0019] Preferably, the yarn-changing mechanism with anti-slip forced telescopic block further includes a yarn-pushing mechanism; the yarn-pushing mechanism includes a piston chamber cover, a yarn-pushing piston rod, a yarn-pushing return spring, and a yarn-pushing steering wheel; the 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 piston chamber cover; the yarn-pushing return spring is located inside the yarn-pushing piston chamber and its two ends act on the piston part of the yarn-pushing piston rod and the piston chamber cover respectively; the yarn-pushing steering wheel is fixedly connected to the extended end of the connecting rod part of the yarn-pushing piston rod. Further, the yarn-pushing steering wheel includes a central disc seat, an outer ring, and several radial push rods; the central disc seat and the outer ring are fastened together by the radial push rods; the radial push rods are located inside the yarn-pushing channel; the central disc seat is fixedly connected to the extended end of the connecting rod part of the yarn-pushing piston rod.

[0020] Beneficial technical effects: The yarn-cutting-free head-changing mechanism with anti-slip forced telescopic block disclosed in this application reduces the resistance to yarn ejection and improves yarn ejection efficiency by setting a certain inclination angle between the outer yarn-dropping surface of the yarn-dropping column on the upper head-changing seat and the central axis of the head shaft. By incorporating a forced telescopic mechanism consisting of a telescopic block, a telescopic frame, and a telescopic drive head on the upper head-changing seat, the telescopic block can automatically extend or retract during head-changing and yarn ejection, respectively, thus ensuring both the head-changing efficiency and the smooth ejection and retraction of the yarn.

[0021] 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

[0022] Figure 1 : 3D structural diagram of the yarn-cutting mechanism on the forced telescopic block; Figure 2 : Exploded view of the yarn-changing mechanism on the forced telescopic block; Figure 3 : Functional diagram of the yarn-changing mechanism on the forced telescopic block; Figure 4 First embodiment of the forced telescopic block head-changing and yarn-cutting-free mechanism; Figure 5 Second embodiment of the forced telescopic block head-changing and yarn-cutting-free mechanism; Figure 6 : Schematic diagram of the angle between the outer doffing surface of the upper doffing column of the upper head changing seat and the axis of the machine head; Figure 7 : Schematic diagram of the three-dimensional structure of the wire drawing machine head shaft; Figure 8 : Schematic diagram of the three-dimensional structure of the yarn pushing steering wheel in the yarn pushing mechanism; Figure 9 : Schematic diagram of the forced expansion and contraction states of the expansion block.

[0023] Icon description: 1-Telescopic block; 11-Toothed section; 12-Drive head mating groove; 13-Hinge hole; 14-Limiting shaft hole; 121-Extension section; 122-Rotating section; 123-Retraction section; 2-Telescopic frame; 21-Telescopic cavity; 22-Drive head limiting groove; 23-Hinge fitting hole; 24-Left frame plate; 25-Right frame plate; 26-Telescopic block limiting groove; 3-Telescopic drive head; 31-Drive crossbar; 32-Limiting longitudinal bar; 4-Hinged shaft; 5-Telescopic block limiting shaft; 6-Push-pull linkage; 10-Head shaft; 20-Upper head changing seat; 210-Telescopic mechanism accommodating position; 220-Connecting rod through hole; 230-Drop yarn column; 240-Outer drop yarn surface; 250-Yarn pushing channel; 260-Yarn pushing piston chamber; 30-cone sleeve; 40 - Fitting shaft sleeve; 50-Spring sleeve rod; 60 - Drive air chamber; 70- Yarn pushing mechanism; 710- Piston chamber cover; 720- Yarn pushing piston rod; 730- Yarn pushing return spring; 740- Yarn pushing steering wheel; 750- Center plate seat; 760- Outer ring; 770- Radial push rod. Detailed Implementation

[0024] Please see Figures 1 to 3 The yarn-cutting-free head-changing mechanism with anti-slip forced telescopic block disclosed in this application mainly includes a telescopic block 1, a telescopic frame 2, a telescopic drive head 3, a hinge shaft 4, a telescopic block limiting shaft 5, and a push-pull linkage 6.

[0025] The telescopic block 1 is provided with a toothed part 11, a drive head mating groove 12, a hinge hole 13, and a limiting shaft hole 14; wherein: The toothed section 11 is a toothed surface used to improve the efficiency of yarn winding and feeding; The drive head mating groove 12 is used to cooperate with the telescopic drive head 3 to drive the telescopic block 1; the orientation and shape of the drive head mating groove 12 determine the efficiency and rotation angle of the telescopic block 1's telescopic movement; in this embodiment, the drive head mating groove 12 includes an extension section 121, a rotation section 122, and a retraction section 123; when the telescopic drive head 3 is located in the extension section 121, the telescopic block 1 is in the extension state (see [reference]). Figure 3 (See upper middle diagram); when the telescopic drive head 3 is located in the retracted section 123, the telescopic block 1 is in the retracted state (see upper middle diagram). Figure 3 (See lower part of the figure); when the telescopic drive head 3 moves within the rotating section 122, the telescopic block 1 switches between extended and retracted states. The hinge hole 13 is located on the side of the telescopic block 1 opposite to the drive head mating groove 12, and is used to mate the hinge shaft 4 to hinge the telescopic block 1 in the telescopic frame 2; The limiting shaft hole 14 is located on the telescopic block 1 between the drive head mating groove 12 and the hinge hole 13. It is used to cooperate with the telescopic block limiting shaft 5 to limit the rotation direction of the telescopic block 1 and increase the stability of the rotation movement of the telescopic block 1.

[0026] The telescopic frame 2 has a frame structure, which includes a left frame plate 24 and a right frame plate 25; the left frame plate 24 and the right frame plate 25 are fixedly connected by a connecting plate or block, and a telescopic cavity 21 is defined between the left and right frame plates; a drive head limiting groove 22 is provided at the corresponding parts of the left frame plate 24 and the right frame plate 25.

[0027] The telescopic cavity 21 is used to provide the space for the telescopic block 1 to rotate and extend. The drive head limiting groove 22 is used to limit the movement of the telescopic drive head 3. In this embodiment, the drive head limiting groove 22 is a straight groove, that is, the telescopic drive head 3 can only move in a straight line.

[0028] The left and right frame plates are also provided with hinge mating holes 23 and telescopic block limiting grooves 26; the hinge mating holes 23 are used to cooperate with the hinge shaft 4 to realize the hinge connection between the telescopic block 1 and the telescopic frame 2; the telescopic block limiting grooves 26 are used to cooperate with the telescopic block limiting shaft 5 to limit the rotation direction of the telescopic block 1.

[0029] The telescopic drive head 3 includes a drive crossbar 31 and limiting longitudinal bars 32 located on both sides of the drive crossbar 31; the drive crossbar 31 and the two limiting longitudinal bars 32 are integrally formed, presenting an overall U-shaped structure. The drive crossbar 31 is used to cooperate with the drive head mating groove 12 to complete the telescopic drive of the telescopic block 1; the limiting longitudinal bars 32 are used to cooperate with the drive head limiting groove 22 to complete the movement trajectory limitation of the telescopic drive head 3.

[0030] Assembly relationship between telescopic block 1, telescopic frame 2, and telescopic drive head 3: The telescopic block 1 is hinged in the telescopic cavity 21 through the hinge hole 13, the hinge mating hole 23 and the hinge shaft 4; and the drive head mating groove 12 and the drive head limiting groove 22 are located at the same end; The telescopic drive head 3 is simultaneously set in the drive head mating groove 12 and the drive head limiting groove 22; that is, the drive crossbar 31 is movably set in the drive head mating groove 12, and the two limiting longitudinal bars 32 are respectively set in the drive head limiting grooves 22 on the left and right frame plates. The telescopic block limiting shaft 5 is simultaneously set in the limiting shaft hole 13 and the telescopic block limiting groove 26; One end of the push-pull linkage 6 is connected to the telescopic drive head 3, and the other end is used to receive the axial driving force.

[0031] Telescopic drive description: When the push-pull linkage 6 does not provide axial driving force, the drive crossbar 31 of the telescopic drive head 3 is located in the extension section 121 of the drive head mating groove 12, and the telescopic block 1 is in the extended state; the telescopic block limiting shaft 5 is located at the top of the telescopic block limiting groove 26. When the push-pull linkage 6 applies axial driving force, the drive crossbar 31 of the telescopic drive head 3 moves linearly along the drive head limiting groove 22 and enters the rotating section 122 of the drive head mating groove 12; the telescopic block 1 begins to rotate and extend until it enters the contraction section 123 of the drive head limiting groove 22; when the drive crossbar 31 enters the end of the contraction section 123, the telescopic block 1 is in a contracted state; at this time, the telescopic block limiting shaft 5 is located at the bottom end of the telescopic block limiting groove 26.

[0032] When the telescopic drive head 3 makes a reverse linear motion, the telescopic block 1 performs the opposite action as described above, which will not be repeated here.

[0033] The above describes the components, connections, and functions of the forced telescopic mechanism. When applied to the head shaft of a wire drawing machine, the forced telescopic mechanism can form the non-slip, head-changing, yarn-cutting mechanism with anti-slip forced telescopic blocks as described in this application.

[0034] Please see Figures 4 to 9 The head-changing, yarn-cutting-free mechanism with anti-slip forced telescopic block also includes a head shaft 10, an upper head-changing seat 20, a cone sleeve 30, a mating shaft sleeve 40, and a spring sleeve rod 50.

[0035] The upper head changing seat 20 is located at the end of the machine head shaft 10; the tapered sleeve 30 and the mating shaft sleeve 40 are both sleeved on the machine head shaft 10 and define the driving air chamber 60 between them; the spring sleeve rod 50 is located between the tapered sleeve 30 and the upper head changing seat 20; the upper head changing seat 20 is provided with a telescopic mechanism receiving position 210 and a connecting rod through hole 220; the connecting rod through hole 220 connects from the telescopic mechanism receiving position 210 to the tapered sleeve 30; the telescopic frame 2 is located in the telescopic mechanism receiving position 210, and the push-pull connecting rod 6 is movably located in the connecting rod through hole 220; the two ends of the push-pull connecting rod 6 are respectively connected to the telescopic drive head 3 and the tapered sleeve 30.

[0036] The spring sleeve 50 includes a guide rod and a spring sleeved on the guide rod; the corresponding parts of the tapered sleeve 30 and the mating shaft sleeve 40 are respectively provided with guide rod holes; the two ends of the guide rod are respectively movably disposed in the guide rod holes on the tapered sleeve 30 and the upper head changing seat 20; the spring sleeve is disposed between the tapered sleeve 30 and the upper head changing seat 20.

[0037] When the cone sleeve 30 moves upward to the head-changing seat 20 under the action of compressed air, it pushes the push-pull connecting rod 6 and compresses the sleeve spring at the same time; when the compressed air is disconnected, the cone sleeve 30 leaves the upper head-changing seat 20 under the action of the sleeve spring, and at the same time drives the push-pull connecting rod 6 back to the initial state.

[0038] The upper head changer 20 is provided with several doffing columns 230 and several pushing channels 250; the doffing columns 230 and pushing channels 250 are evenly spaced around the head shaft 10; the upper head changer 20 has a central inner cavity in the middle part; that is, the annular sidewall of the central inner cavity of the upper head changer 20 is divided by the pushing channels 250 to form several doffing columns 230; the included angle formed between the outer doffing surface 240 of the doffing column 230 and the axis of the head shaft 10 is... α ≥3° (see Figure 8 The telescopic mechanism receiving position 210 is located on the doffing column 230.

[0039] Extension movement: The compressed air in the drive air chamber 60 is disconnected, and the cone sleeve 30 drives the push-pull linkage 6 back to its original position under the action of the spring sleeve rod 50; the drive crossbar 31 of the telescopic drive head 3 is located in the extension section 121 of the drive head mating groove 12, and the telescopic block 1 is in the extended state; at this time, the toothed part 11 of the telescopic block 1 protrudes from the outer yarn-falling surface 240 of the upper head changing seat 20; during the upper head changing, the yarn can be wound onto the head with high efficiency; please refer to Figure 9 The solid line indicates the telescopic block 1; Contraction Movement: Compressed air is supplied to the drive air chamber 60; the cone sleeve 30 moves upward to the head change seat 20 under air pressure, simultaneously pushing the push-pull linkage 6; after being pushed by the push-pull linkage 6, the telescopic drive head 3's drive crossbar 31 moves from the extension section 121 into the rotation section 122; the telescopic block 1 begins to rotate and contract around the hinge axis 4; when the drive crossbar 31 of the telescopic drive head 3 reaches the end of the contraction section 123, the telescopic block 1 is in a contracted state; at this time, the entire telescopic block 1, including the toothed portion 11, automatically hides into the telescopic mechanism receiving position 210 on the upper head change seat 20, and the toothed portion 11 of the telescopic block 1 is lower than the outer yarn doffing surface 240 of the upper head change seat 20; thus, the pushing resistance of the head yarn can be reduced when the head yarn loop is pushed out; please refer to Figure 9 The telescopic block 1 is shown by the dashed line.

[0040] The aforementioned yarn push function of the machine head is accomplished by the yarn pushing mechanism 70. This head-changing, yarn-cut-free mechanism with anti-slip forced telescopic block also includes the yarn pushing mechanism 70; the yarn pushing mechanism 70 includes a piston chamber cover 710, a yarn pushing piston rod 720, a yarn pushing return spring 730, and a yarn pushing steering wheel 740; a yarn pushing piston chamber 260 is provided at the center of the machine head shaft 10; the piston chamber cover 710 is located at the opening of the yarn pushing piston chamber 260, the piston part of the yarn pushing piston rod 720 is located inside the yarn pushing piston chamber 260 and the connecting rod part extends out of the piston chamber cover 710; the yarn pushing return spring 730 is located at the opening of the yarn pushing piston chamber 260. The yarn pushing piston chamber 260 is located inside the yarn pushing piston cavity and acts on the piston part of the yarn pushing piston rod 720 and the piston cavity cover 710 at both ends respectively; the yarn pushing steering wheel 740 includes a central disc seat 750, an outer ring 760 and several radial push rods 770; the central disc seat 750 and the outer ring 760 are fastened together by the radial push rods 770; the radial push rods 770 are arranged in the yarn pushing channel 250; the central disc seat 750 is located in the central inner cavity of the upper head changing seat 20 and is fixedly connected to the extended end of the connecting rod part of the yarn pushing piston rod 720.

[0041] In the head changing process, the compressed air in the drive air chamber 60 is disconnected, so that the telescopic block 1 is in the extended state; the toothed part 11 of the telescopic block 1 protrudes from the outer yarn doffing surface 240 of the head changing seat 20; the machine head rotates and quickly winds the yarn onto the head through the toothed part 11. In the yarn pushing process, the compressed air in the drive air chamber 60 is turned on, causing the telescopic block 1 to be in a retracted state; the toothed part 11 of the telescopic block 1 is lower than the outer yarn dropping surface 240 of the upper head changing seat 20; the compressed air in the yarn pushing piston chamber 260 is turned on, and the yarn pushing piston rod 720 drives the yarn pushing steering wheel 740 to move forward along the yarn pushing channel 250, pushing the yarn ring of the machine head down to the upper head changing seat 20 for recycling; then the compressed air in the drive air chamber 60 and the yarn pushing piston chamber 260 is turned off, causing the telescopic block 1 to unfold and wait for the upper head changing to grab the yarn, and the yarn pushing steering wheel 740 returns to its original position under the action of the yarn pushing return spring 730 and the yarn pushing piston rod 720, waiting for the next yarn pushing.

[0042] As can be seen from the above description, the anti-slip forced telescopic block head-changing and yarn-cutting-free mechanism disclosed in this application achieves this by setting a certain tilt angle between the outer yarn-dropping surface 240 of the yarn-dropping column 230 and the central axis of the machine head shaft 10. α This reduces the resistance to the yarn ejection and improves the yarn ejection efficiency. By setting a forced telescopic mechanism on the upper head change seat 20, the telescopic block 1 can automatically extend or retract during upper head change and yarn ejection, respectively, thus ensuring both the upper head change efficiency and the smooth ejection of the yarn.

[0043] 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 with a non-slip, forced telescopic block, characterized in that: Including a forced telescopic mechanism; The forced telescopic mechanism includes a telescopic block (1), a telescopic frame (2), and a telescopic drive head (3); The telescopic frame (2) is provided with a telescopic cavity (21), and the end of the telescopic frame (2) is provided with a drive head limiting groove (22). The telescopic block (1) is provided with a toothed part (11) and a drive head mating groove (12). The telescopic block (1) is hinged in the telescopic cavity (21) and the drive head mating groove (12) and the drive head limiting groove (22) are located at the same end; The telescopic drive head (3) is simultaneously disposed in the drive head mating groove (12) and the drive head limiting groove (22).

2. The yarn-changing mechanism with anti-slip forced telescopic block according to claim 1, characterized in that: The telescopic block (1) is provided with a hinge hole (13); The telescopic frame (2) is provided with a hinge fitting hole (23); The telescopic block (1) is hinged in the telescopic cavity (21) through the cooperation of the hinge hole (13), the hinge mating hole (23) and the hinge shaft (4).

3. The yarn-changing mechanism with anti-slip forced telescopic block according to claim 1, characterized in that: The drive head mating groove (12) includes an extension section (121), a rotation section (122), and a retraction section (123); The drive head limiting groove (22) is a straight groove; The telescopic drive head (3) is capable of linear reciprocating motion within the drive head limiting groove (22); When the telescopic drive head (3) is located in the extension section (121), the telescopic block (1) is in the extended state; When the telescopic drive head (3) is located in the contraction section (123), the telescopic block (1) is in a contracted state; When the telescopic drive head (3) moves within the rotating section (122), the telescopic block (1) switches between extended and retracted states.

4. The yarn-changing mechanism with anti-slip forced telescopic block according to claim 3, characterized in that: The telescopic drive head (3) includes a drive crossbar (31) and limiting longitudinal bars (32) located on both sides of the drive crossbar (31). The drive crossbar (31) is used to cooperate with the drive head mating groove (12) to complete the extension and retraction drive of the telescopic block (1); The limiting rod (32) is used to cooperate with the driving head limiting groove (22) to limit the movement trajectory of the telescopic driving head (3).

5. The yarn-changing mechanism with anti-slip forced telescopic block according to claim 1, characterized in that: The telescopic frame (2) includes a left frame plate (24) and a right frame plate (25); The telescopic cavity (21) is defined between the left frame plate (24) and the right frame plate (25). The drive head limiting groove (22) is symmetrically arranged on the left frame plate (24) and the right frame plate (25).

6. The yarn-changing mechanism with anti-slip forced telescopic block according to claim 1, characterized in that: The forced telescopic mechanism also includes a telescopic block limiting shaft (5). The telescopic block (1) is provided with a limit shaft hole (14). The telescopic frame (2) is provided with a telescopic block limiting groove (26); The telescopic block limiting shaft (5) is simultaneously disposed in the limiting shaft hole (14) and the telescopic block limiting groove (26).

7. The yarn-changing mechanism with anti-slip forced telescopic block according to claim 1, characterized in that: The forced telescopic mechanism also includes a push-pull linkage (6). One end of the push-pull linkage (6) is connected to the telescopic drive head (3), and the other end is used to receive axial driving force.

8. The yarn-changing mechanism with anti-slip forced telescopic block according to claim 7, characterized in that: The anti-slip forced telescopic block head-changing and yarn-cutting-free mechanism also includes a head shaft (10), an upper head-changing seat (20), a cone sleeve (30), a mating shaft sleeve (40), and a spring sleeve rod (50). The upper head changing seat (20) is disposed at the end of the head shaft (10); The tapered sleeve (30) and the mating shaft sleeve (40) are both sleeved on the head shaft (10) and define a driving air chamber (60) between them. The spring sleeve (50) is disposed between the cone sleeve (30) and the upper head changing seat (20); The upper head-changing seat (20) is provided with a telescopic mechanism accommodating position (210) and a connecting rod through hole (220). The telescopic frame (2) is located within the telescopic mechanism accommodating position (210), and the push-pull connecting rod (6) is movably located within the connecting rod through hole (220); The end of the push-pull link (6) that is opposite to the telescopic drive head (3) is connected to the cone sleeve (30).

9. The yarn-changing mechanism with anti-slip forced telescopic block according to claim 8, characterized in that: The upper head changing seat (20) is provided with several yarn dropping columns (230). Several of the doffing columns (230) are evenly distributed around the head shaft (10); The angle formed by the outer doffing surface (240) of the doffing column (230) and the axis of the machine head shaft (10) is greater than or equal to 3°; The telescopic mechanism receiving position (210) is located on the doffing post (230).

10. The yarn-changing mechanism with anti-slip forced telescopic block according to claim 9, characterized in that: The upper head changing seat (20) is also provided with several yarn pushing channels (250). The doffing column (230) and the pushing channel (250) are evenly spaced with the head shaft (10) as the center; The head shaft (10) is provided with a yarn pushing piston chamber (260) at its center. The yarn-changing and yarn-cutting mechanism with anti-slip forced telescopic block also includes a yarn-pushing mechanism (70). The yarn pushing mechanism (70) includes a piston chamber cover (710), a yarn pushing piston rod (720), a yarn pushing return spring (730), and a yarn pushing steering wheel (740). The piston chamber cover (710) is disposed at the opening of the yarn pushing piston chamber (260), and the piston part of the yarn pushing piston rod (720) is disposed inside the yarn pushing piston chamber (260) and the connecting rod part extends out of the piston chamber cover (710). The yarn pushing return spring (730) is disposed in the yarn pushing piston cavity (260) and its two ends act on the piston part of the yarn pushing piston rod (720) and the piston cavity cover (710) respectively. The yarn pushing steering wheel (740) includes a central disc base (750), an outer ring (760), and several radial push rods (770). The central disc base (750) and the outer ring (760) are fastened together as one unit by the radial push rod (770); The radial push rod (770) is disposed within the yarn pushing channel (250); The central plate seat (750) is fixedly connected to the extended end of the connecting rod of the yarn pushing piston rod (720).

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