Yarn feeding mechanism with dynamic tension compensation

Abstract

The invention relates to a yarn feeding mechanism with dynamic tension compensation, which comprises a creel and an adjusting shell arranged on a tufting machine, a plurality of bobbins are placed on the creel, a guide plate is arranged on the adjusting shell, a plurality of threading holes are formed in the guide plate, a concave part is arranged on the adjusting shell, and a plurality of placing grooves are formed in the surface of the concave part. A compensation unit is arranged in each placement groove, the multiple threading holes and the compensation units are in one-to-one correspondence with the multiple bobbins, each compensation unit comprises a driving part, the output end of each driving part is provided with a tension clamping base in sliding fit with the corresponding placement groove, a compensation roller is rotationally connected into each tension clamping base, and the compensation rollers abut against the yarn; a tension sensor is embedded in the compensation roller, the tension sensor is electrically connected to the driving piece through a control system, and yarn is led into the tufting area through the threading hole and the tension clamping seat. The method has the effect of improving the quality of a tufted carpet finished product.

Description

Technical Field

[0001] The present application relates to the technical field of carpet production, and in particular to a yarn feeding mechanism with dynamic tension compensation. Background Art

[0002] In the production process of tufted carpets, it is necessary to combine the yarn and the base fabric through the tufting production line to form a finished carpet with a specific pile loop or cut pile structure. The existing tufting production line usually includes a tufting machine and a yarn feeder. The yarn feeder is equipped with multiple yarn bobbins. The yarn wound on the yarn bobbins is led out by a guide mechanism and then fed into the tufting working area of ​​the tufting machine. It cooperates with the base fabric transmitted from the base fabric delivery unit of the tufting machine. The tufting needles in the tufting machine implant the yarn into the base fabric according to the preset density and pile height. After subsequent processing steps such as shearing and shaping, a tufted carpet is obtained.

[0003] The yarn feeding mechanism in traditional tufting production lines mostly adopts passive yarn feeding, that is, it relies on the traction force of the yarn on the tufting machine when it is working to drive the yarn bobbin to rotate to realize yarn unwinding and feeding, and only uses a simple spring tensioner or gravity tensioner to perform preliminary adjustment of the yarn tension. However, in the actual tufting process, the yarn on the yarn bobbin gradually decreases with the yarn feeding process, and the diameter of the yarn bobbin will continue to change, resulting in changes in the linear speed and tension when the yarn is unwinding, and the operating speed of the tufting machine may change due to production needs. These factors will cause fluctuations in yarn tension, and tension fluctuations will make the yarn embedded in the base fabric different in tightness, which will cause defects such as high and low pile, missed stitches and broken yarns on the carpet surface, resulting in reduced quality of the finished tufted carpet, which has obvious shortcomings. Summary of the Invention

[0004] In order to improve the quality of the finished tufted carpet, the present application provides a yarn feeding mechanism with dynamic tension compensation.

[0005] The present application provides a yarn feeding mechanism with dynamic tension compensation adopts the following technical solution: A yarn feeding mechanism with dynamic tension compensation comprises a yarn rack and an adjusting shell arranged on a tufting machine, a plurality of yarn bobbins are placed on the yarn rack, a guide plate is provided on the adjusting shell, a plurality of threading holes are provided on the guide plate, a recess is provided on the adjusting shell, a plurality of placement grooves are provided on the surface of the recess, a compensation unit is provided in each of the placement grooves, the plurality of threading holes and the compensation units are arranged in a one-to-one correspondence with the plurality of yarn bobbins, the compensation unit comprises a driving member, the output end of the driving member is provided with a tension clamp seat that slides with the placement groove, a compensation roller is rotatably connected in the tension clamp seat, the compensation roller abuts against the yarn, a tension sensor is embedded in the compensation roller, the tension sensor is electrically connected to the driving member through a control system, and the yarn is introduced into the tufting area through the threading holes and the tension clamp seat.

[0006] By adopting the above technical solution, when the yarn is introduced, the yarn on the yarn bobbin is passed through the threading hole inside the tension clamp seat, and the yarn is made to abut against the compensation roller. During the operation of the tufting machine, the tension sensor monitors the tension changes of the yarn during the transportation process. When the tension fluctuates, the tension sensor feeds back the signal to the control system. The control system controls the driving member to drive the tension clamp seat to slide along the placement groove, thereby increasing or decreasing the pressure of the compensation roller on the yarn, thereby realizing compensation adjustment of the yarn tension. Compared with the traditional passive yarn feeding mechanism, the setting of the compensation unit can effectively cope with the tension fluctuation of each yarn, and realize dynamic adjustment of the tension of each yarn, thereby avoiding the situation where the yarn is implanted into the base cloth with different tightness due to tension fluctuations, thereby improving the quality of the finished tufted carpet.

[0007] Optionally, a plurality of the recesses are provided in the yarn conveying direction, and the plurality of recesses and the guide plates are distributed in a stepped manner on the adjusting shell.

[0008] By adopting the above technical solution, the setting of multiple recesses and compensation units forms multi-segment monitoring of the yarn, reducing the occurrence of abnormal fluctuations in local tension without timely correction. At the same time, the stepped distribution is more in line with the actual conveying path of the yarn, improving the monitoring accuracy of the compensation unit.

[0009] Optionally, a lead frame is provided between the adjusting shell and the yarn frame, and the lead frame includes two oppositely arranged columns, and a lead frame is mounted on the two columns. The lead frame is provided with rubber tubes corresponding to the multiple yarn tubes one by one, and multiple yarns are all passed through the corresponding rubber tubes.

[0010] By adopting the above technical solution, after the yarn is led out from the yarn frame, it first passes through the corresponding rubber tube and then enters the threading hole of the wire board. The rubber tube forms an isolation protection for the yarn, reducing the possibility of dust and other impurities inside the workshop coming into contact with the yarn and contaminating the yarn. At the same time, it avoids the entanglement of adjacent yarns, ensuring the stable yarn feeding.

[0011] Optionally, the rubber tube is detachably connected to the lead frame via a connecting assembly, wherein the connecting assembly includes connecting heads arranged on opposite sides of the rubber tube, and connecting tubes threadedly connected to the connecting heads are arranged on opposite sides of the lead frame along the length direction.

[0012] By adopting the above technical solution, when the rubber tube is damaged due to long-term use and cannot protect the yarn, workers can quickly disassemble and replace the rubber tube by loosening the threads of the connector and the connecting tube. There is no need to replace the lead frame as a whole, which reduces the equipment maintenance cost and the difficulty of replacing the rubber sleeve, and reduces production downtime caused by maintenance.

[0013] Optionally, a lead assembly is provided on the lead frame, and the lead assembly includes a threading ring, a fixing assembly for clamping the yarn is provided inside the threading ring, and the threading ring is slidably provided inside the connecting tube and the rubber tube. The lead frame is provided with a rodless cylinder along the length direction, and a connecting plate is provided on the moving part of the rodless cylinder, and a driving magnetic ring corresponding to a plurality of the rubber tubes is provided on the connecting plate. The driving magnetic ring is slidably sleeved on the outside of the corresponding rubber tube, and a plurality of driven magnetic blocks that are magnetically attracted to the driving magnetic ring are embedded in the threading ring.

[0014] By adopting the above technical solution, when threading the yarn, the worker threads the yarn on multiple yarn bobbins into the corresponding threading rings, then fixes the yarn with a fixed assembly, starts the rodless cylinder to drive the connecting plate to drive multiple driving magnetic rings to move along the length direction of the lead frame, and utilizes the magnetic attraction between the driving magnetic ring and the multiple driven magnetic blocks to drive the threading ring to slide inside the rubber tube and the connecting tube, thereby pulling the yarn from the connecting tube close to the yarn frame to the inside of the connecting tube close to the tufting machine, thereby realizing the synchronous feeding of multiple yarns inside the rubber tube, significantly reducing the difficulty of workers in threading the yarn through the rubber tube, and improving the yarn threading efficiency.

[0015] Optionally, the fixing component includes an annular airbag arranged in the threading ring, the annular airbag is sleeved on the outer peripheral side of the yarn, a limit block is provided on each of the driven magnetic blocks, a limit groove is provided in the threading ring, and a limit block slidingly cooperates with the limit block is provided, and an elastic airbag storing gas is provided at the end of the limit groove away from the annular airbag. Multiple elastic airbags are connected to the annular airbag through an air supply pipe. When the elastic airbag is in a natural state, the limit block is provided at the end of the limit groove close to the annular airbag, and a blocking block for limiting the displacement of the threading ring is provided inside the connecting tube.

[0016] By adopting the above technical solution, in the initial state, the driving magnetic ring and the threading ring are staggered. When the driving magnetic ring moves to the same position of the threading ring in the axial direction, the driving magnetic ring attracts the driven magnetic block to move toward the inner wall of the rubber tube. The movement of the driven magnetic block drives the limit block to squeeze the elastic airbag. The gas inside the elastic airbag enters the annular airbag along the air pipe. The annular airbag expands and fits tightly to the outer periphery of the yarn, realizing flexible clamping of the yarn and ensuring stable transportation of the yarn during the yarn feeding process. When the driving magnetic ring drives the threading ring to move to the stop, the limit block will squeeze the elastic airbag. When connected to the blocking ring close to the tufting machine, the threading ring cannot move further. At this time, the driving magnetic ring continues to move and separates from the driven magnetic block. The attraction between the driving magnetic ring and the driven magnetic block decreases, the elastic airbag resets, and the gas is withdrawn from the annular airbag. The annular airbag contracts and loosens the yarn without affecting the normal transportation of the subsequent yarn. This setting realizes the automatic clamping and release of the yarn, and it is automatically realized by relying on the magnetic force between the driving magnetic ring and the driven magnetic block. No additional electronic control components or manual operation are required, which further improves the yarn drawing efficiency and stability.

[0017] Optionally, a guiding vertebra is provided at the end of the threading ring.

[0018] By adopting the above technical solution, the guiding cone can ensure that the threading ring always slides smoothly along the axial direction of the connecting tube and the rubber tube through its own conical guiding effect, reducing the possibility of the threading ring tilting and getting stuck during movement, resulting in yarn feed interruption, and ensuring the synchronization and smoothness of multiple yarn feeding.

[0019] Optionally, guide blocks are provided on opposite sides of the lead frame, and guide grooves are provided in the column to slide with the guide blocks. A screw is rotatably connected in one of the guide grooves, and the guide block is threadedly connected to the screw. A lifting motor is provided on the column to drive the screw to rotate.

[0020] By adopting the above technical solution, when it is necessary to replace the rubber sleeve or perform yarn lead-in operation, the lifting motor is started to drive the screw to rotate, and the guide block is driven to slide up and down along the guide groove through the thread transmission, thereby driving the entire lead frame to rise and fall synchronously. The lead frame can be adjusted to a position that is convenient for reaching out and operating according to the worker's operating height requirements, thereby reducing the difficulty and labor intensity of manual operation.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. This application employs multiple compensation units. Tension sensors monitor changes in yarn tension during conveyance. When tension fluctuations occur, the tension sensors feed signals back to the control system. The control system then controls the drive element to drive the tension clamp to slide along the placement slot, thereby increasing or decreasing the pressure of the compensation roller on the yarn, thereby achieving compensation adjustment for yarn tension. Compared with traditional passive yarn feeding mechanisms, the provision of compensation units can effectively address tension fluctuations of each yarn and dynamically adjust the tension of each yarn, thereby avoiding the situation where the yarn is embedded in the base fabric with varying tightness due to tension fluctuations, thereby improving the quality of the finished tufted carpet. 2. This application provides a connection assembly and slides the lead frame onto the column. When the rubber tube is damaged due to long-term use and can no longer protect the yarn, the lifting motor drives the screw to rotate. Under the guidance of the guide groove and the guide block, the screw drives the lead frame to descend along the column to a height convenient for workers to operate. The worker then quickly removes and replaces the rubber tube by loosening the threaded connection head and the connecting tube. This makes it possible to replace the rubber tube without replacing the entire lead frame, reducing equipment maintenance costs and the difficulty of replacing the rubber sleeve. 3. This application realizes the synchronous threading of multiple yarns inside the rubber tube by setting a yarn threading assembly and a fixing assembly, thereby reducing the difficulty of workers in threading the yarn through the rubber tube and improving the yarn threading efficiency. At the same time, the driving magnetic ring and the driven magnetic block are combined to automatically clamp and release the yarn, without the need for additional electronic control components or manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of this application.

[0023] Figure 2 It is a cross-sectional view of the compensation unit in the embodiment of the present application.

[0024] Figure 3 It is a structural schematic diagram of the yarn drawing assembly in an embodiment of the present application.

[0025] Figure 4 It is a cross-sectional view of the rubber tube and the connecting tube in the embodiment of the present application.

[0026] Figure 5 It is a cross-sectional view of the threading ring in the embodiment of the present application.

[0027] Explanation of the accompanying drawings: 1. Yarn rack; 101. Yarn bobbin; 2. Tufting machine; 3. Lead frame; 31. Post; 311. Guide groove; 32. Lead frame; 321. Guide block; 33. Screw; 34. Lifting motor; 4. Rubber tube; 5. Adjusting shell; 51. Guide plate; 511. Threading hole; 52. Recess; 53. Placement slot; 6. Compensation unit; 61. Driving member; 62. Tension clamp; 63. Compensation roller; 7. Connecting assembly; 71. Connecting head; 72. Connecting pipe; 8. Lead assembly; 81. Threading ring; 811. Guide cone; 812. Limiting groove; 82. Rodless cylinder; 83. Connecting plate; 84. Driving magnetic ring; 85. Driven magnetic block; 9. Fixing assembly; 91. Annular air bag; 92. Limiting block; 93. Elastic air bag; 94. Air pipe; 95. Blocking block. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-5 This application is described in further detail.

[0029] An embodiment of the present application discloses a yarn feeding mechanism with dynamic tension compensation.

[0030] Reference Figure 1 A yarn feeding mechanism with dynamic tension compensation includes a yarn rack 1, a tufting machine 2 and a lead frame. A plurality of yarn bobbins 101 wound with yarn are placed on the yarn rack 1. In this embodiment, the number of yarn bobbins 101 is nine, and the nine yarn bobbins 101 are distributed in an array.

[0031] Reference Figure 1 The lead frame includes two oppositely arranged columns 31, and a lead frame 32 is jointly mounted on the two columns 31. Rubber tubes 4 corresponding to multiple yarn drums 101 are placed on the lead frame 32. After the yarn is led out from the yarn drum 101, it is passed through the corresponding rubber tube 4. The rubber tube 4 forms an isolation protection for the yarn, reducing the possibility of dust and other impurities in the workshop coming into contact with the yarn and contaminating the yarn, while avoiding the entanglement of adjacent yarns, ensuring the stable yarn feeding.

[0032] Reference Figure 1 and Figure 2 An adjusting shell 5 is fixedly installed on the surface of the tufting machine 2 facing the lead frame, and a plurality of guide plates 51 are installed on the adjusting shell 5. In this embodiment, there are three guide plates 51, and the three guide plates 51 are distributed in a stepped manner along the conveying direction of the yarn. Each guide plate 51 is provided with threading holes 511 corresponding to the plurality of yarn tubes 101.

[0033] Reference Figure 1 and Figure 2, a plurality of recesses 52 are provided on the adjusting shell 5, and the plurality of recesses 52 are distributed in a stepped manner in the yarn conveying direction. In the present embodiment, the number of the recesses 52 is nine, and each recess 52 is provided with a placement groove 53 corresponding to nine yarn tubes 101. A compensation unit 6 is provided inside each placement groove 53, and the compensation unit 6 includes a driving member 61 installed in the placement groove 53. In the present embodiment, the driving member 61 is a driving cylinder, and the plurality of driving cylinders are electrically connected to the control system of the tufting machine 2. The output end of each driving member 61 is fixedly connected to a tension clamp seat 62 that slides with the placement groove 53. The yarn led out through the rubber tube 4 is introduced into the tufting area of ​​the tufting machine 2 through a plurality of threading holes 511 and a plurality of tension clamp seats 62.

[0034] Reference Figure 1 and Figure 2 Each tension clamp 62 is rotatably connected to a compensation roller 63. When the yarn passes through the tension clamp 62, it abuts against the outer surface of the compensation roller 63. A tension sensor (not shown in the figure) for detecting the yarn tension is embedded in the compensation roller 63. The tension sensor is electrically connected to the drive member 61 in the corresponding placement groove 53 through the control system. During the operation of the tufting machine 2, multiple tension sensors synchronously detect the tension changes of the yarn during the conveying process. When tension fluctuations occur, the tension sensor feeds back the signal to the control system. The control system controls the drive member 61 to drive the tension clamp 62 to slide along the placement groove 53, thereby increasing or decreasing the pressure of the compensation roller 63 on the yarn, thereby achieving compensation adjustment for the yarn tension. Compared with the traditional passive yarn feeding mechanism, the setting of the compensation unit 6 can effectively cope with the tension fluctuations of each yarn and realize dynamic adjustment of the tension of each yarn, thereby avoiding the situation where the yarn is not loose or tight when implanted into the base fabric due to tension fluctuations, thereby improving the quality of the tufted carpet product.

[0035] Reference Figure 1 and Figure 3 Each rubber tube 4 is detachably connected to the lead frame 32 through a connecting assembly 7. Specifically, the connecting assembly 7 includes a connecting head 71 fixedly connected to the rubber tube 4 on both sides of the length direction. The lead frame 32 is fixedly mounted on both sides of the length direction with a connecting tube 72 threadedly connected to the connecting head 71. When the connecting head 71 is threadedly connected to the connecting tube 72, Reference Figure 1 and Figure 3In order to facilitate workers to perform lead and replacement operations, the lead frame 32 is slidably connected to the two columns 31. The opposite ends of each lead frame 32 are fixedly connected to a guide block 321. A guide groove 311 is opened inside the column 31 to slide with the guide block 321. The guide groove 311 is vertically arranged. A screw 33 is rotatably connected to one of the guide grooves 311. The guide block 321 in the guide groove 311 is threadedly connected to the screw 33. A lifting motor 34 is fixedly installed on the column 31, and the output shaft of the lifting motor 34 is coaxially fixedly connected to the screw 33.

[0036] When the rubber tube 4 is damaged due to long-term use and cannot protect the yarn, the lifting motor 34 drives the screw 33 to rotate. Under the guide limit of the guide groove 311 and the guide block 321, the screw 33 drives the lead frame 32 to descend along the column 31 to a height convenient for workers to operate. Then the workers quickly disassemble and replace the rubber tube 4 by loosening the threads of the connecting head 71 and the connecting tube 72. In this way, the replacement of the rubber tube 4 does not require the replacement of the lead frame 32 as a whole, reducing the equipment maintenance cost and the difficulty of replacing the rubber sleeve.

[0037] Reference Figure 3 and Figure 4 In order to improve the workers' wire-leading efficiency, a wire-leading assembly 8 is provided on the lead frame 32. Specifically, the wire-leading assembly 8 includes a threading ring 81, and a fixing assembly 9 for clamping the yarn is provided inside the threading ring 81. A guide cone 811 is integrally formed at the end of the threading ring 81. Under the guidance of the guide cone 811, the threading ring 81 can slide inside the two connecting tubes 72 and the rubber tube 4.

[0038] Reference Figure 3 、 Figure 4 and Figure 5 The lead frame 32 is fixedly installed with a rodless cylinder 82 along the length direction, and a connecting plate 83 is fixedly installed on the moving part of the rodless cylinder 82. Nine driving magnetic rings 84 corresponding to the rubber tubes 4 are fixedly connected to the connecting plate 83. The driving magnetic rings 84 are slidably sleeved on the outer surface of the corresponding rubber tubes 4. The connecting tube 72 is made of copper with low magnetic permeability. A plurality of driven magnetic blocks 85 that are magnetically attracted to the driving magnetic ring 84 are embedded in the threading ring 81. In this embodiment, the number of driven magnetic blocks 85 is four, and the four driven magnetic blocks 85 are evenly distributed along the outer peripheral side of the threading ring 81 at equal distances.

[0039] Reference Figure 3 、 Figure 4 and Figure 5The fixing assembly 9 includes an annular air bag 91 fixedly connected to the inner peripheral side wall of the threading ring 81, and the annular air bag 91 is sleeved on the outer peripheral side of the yarn. The two opposite sides of each driven magnetic block 85 are fixedly connected to the limiting blocks 92. The threading ring 81 is provided with a limiting groove 812 that slides with the limiting block 92. The end of the limiting groove 812 away from the annular air bag 91 is fixedly connected to an elastic air bag 93 containing gas. The eight elastic air bags 93 are all connected to the annular air bag 91 through the air supply pipe 94. In the natural state of the elastic air bag 93, the limiting block 92 is set to abut the end wall of the limiting groove 812 close to the annular air bag 91. When the driving magnetic ring 84 and the driven magnetic ring are aligned in the axial direction, the driving magnetic ring 84 attracts the driven magnetic ring to move in the direction away from the annular air bag 91. At this time, the limiting block 92 squeezes the elastic air bag 93, and the driven magnetic block 85 fits against the inner wall of the rubber tube 4.

[0040] Reference Figure 3 、 Figure 4 and Figure 5 The inner wall of each connecting tube 72 is fixedly connected with a blocking block 95 that limits the displacement of the threading ring 81. The length of the connection between the two blocking blocks 95 is less than the movable distance of the driving magnetic ring 84. In the initial state, the driving magnetic ring 84 and the driven magnetic block 85 are misaligned in the axial direction, and the attraction of the driving magnetic ring 84 to the driven magnetic block 85 is less than the elastic force of the elastic airbag 93.

[0041] Reference Figure 3 、 Figure 4 and Figure 5 When threading the yarn, the worker passes the yarns on multiple bobbins 101 through the corresponding threading rings 81 in sequence, and then starts the rodless cylinder 82. When the rodless cylinder 82 drives the driving magnetic ring 84 to move until it is aligned with the threading ring 81 in the axial direction, the driving magnetic ring 84 overcomes the elastic force of the elastic airbag 93 itself and drives multiple driven magnetic blocks 85 to move toward the inner wall of the rubber tube 4. The driven magnetic blocks 85 simultaneously drive the limiting blocks 92 to slide in the limiting groove 812 and squeeze the elastic airbag 93. The gas in the elastic airbag 93 is quickly injected into the annular airbag 91 along the air delivery pipe 94, causing the annular airbag 91 to expand and fit tightly to the outer periphery of the yarn, thereby fixing the yarn inside the threading ring 81; After the fixation is completed, the rodless cylinder 82 continues to drive the driving magnetic ring 84 to move along the length direction of the rubber tube 4. When the driving magnetic ring 84 moves, the magnetic attraction between it and the multiple driven magnetic blocks 85 drives the threading ring 81 to move along the length direction of the lead frame 32, thereby pulling the yarn from the connecting tube 72 close to the creel 1 to the inside of the connecting tube 72 of the tufting machine 2, thereby realizing the synchronous feeding of multiple yarns inside the rubber tube 4; When the driving magnetic ring 84 drives the threading ring 81 to abut against the blocking ring close to the tufting machine 2, the threading ring 81 is blocked and cannot move further. At this time, the driving magnetic ring 84 continues to move a short distance and is misaligned with the driven magnetic block 85. The magnetic attraction between the driving magnetic ring 84 and the driven magnetic block 85 is reduced. The elastic airbag 93 is reset under the action of its own elastic force and pushes the limit block 92 to reset. At this time, the gas flows back to the elastic airbag 93 along the gas pipe 94, and the annular airbag 91 contracts and detaches from the yarn, realizing automatic loosening of the yarn. This facilitates the subsequent threading of the yarn inside the adjusting housing 5 and avoids the possibility of yarn wear caused by continuous clamping of the fixing component 9. During the next threading operation, the rodless cylinder 82 first drives the driving magnetic ring 84 to move to above the connecting tube 72 close to the yarn rack 1, and then repeats the above operation. The setting of the threading assembly 8 and the fixing assembly 9 realizes the synchronous threading of multiple yarns inside the rubber tube 4, which reduces the difficulty of workers in threading the yarn through the rubber tube 4 and improves the threading efficiency of the yarn. At the same time, combined with the automatic clamping and release of the yarn by the driving magnetic ring 84 and the driven magnetic block 85, no additional electronic control components or manual operation are required.

[0042] The implementation principle of a yarn feeding mechanism with dynamic tension compensation in the embodiment of the present application is as follows: when feeding the yarn, the yarn on the yarn bobbin 101 passes through the rubber tube 4, multiple threading holes 511 and multiple tension clamps 62 in sequence, and is finally introduced into the tufting area of ​​the tufting machine 2. During the threading, the yarn abuts against the compensation roller 63; During the operation of the tufting machine 2, the tension sensor monitors the tension changes of the yarn during the transportation process. When tension fluctuations occur, the tension sensor feeds back the signal to the control system. The control system controls the driving member 61 to drive the tension clamp 62 to slide along the placement groove 53, thereby increasing or decreasing the pressure of the compensation roller 63 on the yarn, thereby realizing compensation adjustment of the yarn tension. Compared with the traditional passive yarn feeding mechanism, the setting of the compensation unit 6 can effectively cope with the tension fluctuations of each yarn and realize dynamic adjustment of the tension of each yarn, thereby avoiding the situation where the yarn is implanted into the base cloth with different tightness due to tension fluctuations, thereby improving the quality of the tufted carpet product.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A yarn feeding mechanism with dynamic tension compensation, characterized in that: The invention comprises a yarn rack (1) and an adjusting shell (5) arranged on a tufting machine (2), wherein a plurality of yarn drums (101) are placed on the yarn rack (1), a guide plate (51) is provided on the adjusting shell (5), a plurality of threading holes (511) are provided on the guide plate (51), a recess (52) is provided on the adjusting shell (5), a plurality of placement grooves (53) are provided on the surface of the recess (52), a compensation unit (6) is provided in each placement groove (53), a plurality of threading holes (511) and the compensation unit (6) are connected to the plurality of yarn drums (1 01) are arranged in a one-to-one correspondence, the compensation unit (6) includes a driving member (61), the output end of the driving member (61) is provided with a tension clamping seat (62) that slides with the placement groove (53), a compensation roller (63) is rotatably connected in the tension clamping seat (62), the compensation roller (63) abuts on the yarn, a tension sensor is embedded in the compensation roller (63), the tension sensor is electrically connected to the driving member (61) through a control system, and the yarn is introduced into the tufting area through the threading hole (511) and the tension clamping seat (62).

2. A yarn feeding mechanism with dynamic tension compensation according to claim 1, characterized in that: A plurality of the recesses (52) are provided in the yarn conveying direction, and the plurality of recesses (52) and the guide plates (51) are distributed in a stepped manner on the adjusting shell (5).

3. The yarn feeding mechanism with dynamic tension compensation according to claim 1, characterized in that: A lead frame (3) is provided between the regulating shell (5) and the yarn frame (1), and the lead frame (3) includes two oppositely arranged columns (31). A lead frame (32) is provided on the two columns (31), and a rubber tube (4) corresponding to a plurality of yarn tubes (101) is provided on the lead frame (32), and a plurality of yarns are all passed through the corresponding rubber tubes (4).

4. The yarn feeding mechanism with dynamic tension compensation according to claim 3, characterized in that: The rubber tube (4) is detachably connected to the lead frame (32) via a connecting assembly (7), wherein the connecting assembly (7) comprises connecting heads (71) arranged on opposite sides of the rubber tube (4), and connecting tubes (72) threadedly connected to the connecting heads (71) are arranged on opposite sides of the lead frame (32) along the length direction.

5. The yarn feeding mechanism with dynamic tension compensation according to claim 4, characterized in that: A lead assembly (8) is provided on the lead frame (32), and the lead assembly (8) includes a threading ring (81), and a fixing assembly (9) for clamping the yarn is provided inside the threading ring (81), and the threading ring (81) is slidably provided inside the connecting tube (72) and the rubber tube (4). The lead frame (32) is provided with a rodless cylinder (82) along the length direction, and a connecting plate (83) is provided on the moving part of the rodless cylinder (82), and a driving magnetic ring (84) corresponding to a plurality of the rubber tubes (4) is provided on the connecting plate (83), and the driving magnetic ring (84) is slidably sleeved on the outside of the corresponding rubber tube (4), and a plurality of driven magnetic blocks (85) magnetically attracted to the driving magnetic ring (84) are embedded in the threading ring (81).

6. The yarn feeding mechanism with dynamic tension compensation according to claim 5, characterized in that: The fixing assembly (9) comprises an annular airbag (91) arranged in the threading ring (81), the annular airbag (91) is sleeved on the outer peripheral side of the yarn, a limiting block (92) is provided on each of the driven magnetic blocks (85), a limiting groove (812) is provided in the threading ring (81) for slidingly cooperating with the limiting block (92), an elastic airbag (93) storing gas is provided at the end of the limiting groove (812) away from the annular airbag (91), a plurality of the elastic airbags (93) are connected to the annular airbag (91) through an air supply pipe (94), and when the elastic airbag (93) is in a natural state, the limiting block (92) is provided at the end of the limiting groove (812) close to the annular airbag (91), and a blocking block (95) for limiting the displacement of the threading ring (81) is provided inside the connecting pipe (72).

7. The yarn feeding mechanism with dynamic tension compensation according to claim 5, characterized in that: The end of the threading ring (81) is provided with a guide cone (811).

8. The yarn feeding mechanism with dynamic tension compensation according to claim 3, characterized in that: Guide blocks (321) are provided on opposite sides of the lead frame (32), and a guide groove (311) is provided in the column (31) for slidingly matching with the guide block (321), a screw rod (33) is rotatably connected in one of the guide grooves (311), the guide block (321) is threadedly connected to the screw rod (33), and a lifting motor (34) is provided on the column (31) for driving the screw rod (33) to rotate.

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