A twist-free CNC active unloading device

Abstract

The utility model relates to the field of yarn unwinding, and discloses a twist-free CNC active unwinding device, comprising a bracket seat, on which a yarn drum bearing is rotatably mounted via a bearing seat, and further comprising: an encoder connecting rod shaft, which is movably plugged into the yarn drum bearing, the bottom end of the encoder connecting rod shaft is fixedly provided with an integrated connecting rod piece extending from the yarn drum bearing, an encoder, which is plugged into the connecting rod piece at the bottom end of the encoder connecting rod shaft; a servo motor, which is fixedly arranged on a side of the bracket seat corresponding to the yarn drum bearing, a belt transmission structure is arranged between the yarn drum bearing and the servo motor, the encoder is electrically connected to the servo motor, the encoder detects the position, rotation speed and rotation direction of the encoder connecting rod shaft, and combined with the precise control of the servo motor, realizes high-precision adjustment of the yarn unwinding, so that the yarn tube rotates synchronously with the encoder connecting rod shaft, achieves the effect of yarn untwisting, reduces yarn friction, and avoids yarn wear.

Description

Technical Field

[0001] The utility model relates to the field of yarn unwinding, in particular to a twist-free numerically controlled active unwinding device. Background Art

[0002] The yarn raw material drum is usually stationary, that is, during the yarn pay-off process, the raw material drum is fixed in one position, and the yarn is extracted by external tension. This pay-off method has the following main disadvantages:

[0003] Yarn wear: Since the yarn raw material tube is stationary and the yarn is continuously drawn by external tension, friction occurs between the surface of the raw material tube and the tube wall. Long-term friction will cause yarn wear and affect the quality and performance of the yarn.

[0004] Excessive twisting of yarn: During the yarn extraction process, since the raw material drum is stationary, the yarn may be subjected to uneven tension when leaving the raw material drum, causing the internal fiber structure of the yarn to be distorted or excessively twisted, further affecting the quality and use effect of the yarn.

[0005] Low production efficiency: Since the yarn is affected by wear and excessive twist during the pay-off process, the yarn may break or the raw material barrel needs to be replaced, which reduces production efficiency. For this reason, we propose a twist-free CNC active pay-off device. Utility Model Content

[0006] ( 一 ) Technical issues solved

[0007] In view of the deficiencies in the prior art, the utility model provides a twist-free CNC active unwinding device to solve the above-mentioned problems.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a twist-free CNC active unloading device, comprising a bracket seat, on which a yarn disc bearing is rotatably mounted through a bearing seat, and the yarn disc bearing is used to install a yarn raw material barrel, and also includes:

[0010] The encoder connecting rod shaft is movably inserted in the yarn disc bearing, and the yarn disc bearing is hollow and penetrates from top to bottom. The bottom end of the encoder connecting rod shaft is fixed with an integrated connecting rod, and the connecting rod penetrates and extends out of the bottom end of the yarn disc bearing;

[0011] A movable plug-in structure is arranged between the yarn disc bearing and the encoder connecting rod shaft, and the movable plug-in structure is used to make the yarn disc bearing and the encoder connecting rod shaft coaxial and rotate separately and independently;

[0012] The encoder has a coupling end rotatably arranged at the top thereof for being plugged into the connecting rod at the bottom end of the encoder connecting rod shaft and for detecting the position, speed and rotation direction of the yarn disc bearing as the encoder connecting rod shaft rotates;

[0013] A docking structure is provided between the end of the coupling shaft and the connecting rod, and the docking structure is used to quickly and stably connect the bottom end of the encoder connecting rod shaft and quickly separate the encoder from the encoder connecting rod shaft;

[0014] The servo motor is fixedly mounted on one side of the bracket seat corresponding to the yarn drum bearing, the bottom end of the yarn drum bearing extends through the top of the bracket seat, and a belt transmission structure is arranged between the yarn drum bearing and the servo motor. The encoder is electrically connected to the servo motor and is used for real-time adjustment of the yarn drum bearing through the rotation feedback of the encoder connecting rod shaft.

[0015] Preferably, symmetrical balancing bent rods are fixedly mounted on both sides of the top end of the encoder connecting rod shaft, and integrated connecting hooks are fixedly mounted on the ends of the two groups of balancing bent rods that are away from each other.

[0016] Preferably, the belt transmission structure includes pulley one, pulley two and a belt, and pulley one is fixedly installed on the bottom end of the yarn disk bearing that extends downward through the top of the bracket seat, and the center of pulley one is in a through shape that is aligned and connected to the yarn disk bearing, and the output shaft of the servo motor extends downward through the top of the bracket seat and is fixedly connected to pulley two, and a belt is provided between pulley one and pulley two.

[0017] Preferably, the bottom end of the connecting rod passes through the center of pulley one and extends out of the bottom end of pulley one.

[0018] Preferably, the movable plug-in structure includes cylindrical groove one, cylindrical groove three, snap-in ring one and snap-in ring two, and the center of the yarn disk bearing has cylindrical groove one, cylindrical groove two, cylindrical groove three and cylindrical groove four which are connected from top to bottom in sequence, and the inner diameter of cylindrical groove one is larger than the inner diameter of cylindrical groove two, the inner diameter of cylindrical groove two is larger than the inner diameter of cylindrical groove three, the inner diameter of cylindrical groove three is larger than the inner diameter of cylindrical groove four, and the inner diameter of cylindrical groove four is larger than the end face diameter of the connecting rod member, and the encoder connecting rod shaft is rotatably connected with snap-in ring one and snap-in ring two spaced apart from each other through a bearing near the bottom end, and the snap-in ring one is adapted to cylindrical groove one, and the snap-in ring two is adapted to cylindrical groove three, that is, the snap-in ring one and the snap-in ring two are respectively fitted and filled in cylindrical groove one and cylindrical groove three.

[0019] Preferably, the movable plug-in structure also includes a semi-cylindrical protrusion 1, a semi-cylindrical protrusion 2, a semi-cylindrical groove 1 and a semi-cylindrical groove 2. The outer ring side wall of the snap-in ring 1 is provided with multiple groups of semi-cylindrical grooves 1 distributed in an annular manner and at equal intervals. The inner wall of the cylindrical groove 1 corresponding to the yarn drum bearing is fixed with multiple groups of integrated semi-cylindrical protrusions 1 adapted to be snapped into the multiple groups of semi-cylindrical grooves 1. The outer ring side wall of the snap-in ring 2 is provided with multiple groups of semi-cylindrical grooves 2 distributed in an annular manner and at equal intervals. The inner wall of the cylindrical groove 3 corresponding to the yarn drum bearing is fixed with multiple groups of integrated semi-cylindrical protrusions 2 adapted to be snapped into the multiple groups of semi-cylindrical grooves 2. The number and position of the semi-cylindrical grooves 1 on the snap-in ring 1 are the same as the number and position of the semi-cylindrical grooves 2 on the snap-in ring 2.

[0020] Preferably, the docking structure includes a cylindrical transverse groove, a snap-fitting ball, a limiting circular piece and a return spring. The middle part of the connecting rod piece corresponding to the end of the connecting shaft is provided with a cylindrical transverse groove with two sides extending therethrough, and the connecting rod piece is slidably snap-fitted with a snap-fitting ball at the two side ports corresponding to the cylindrical transverse groove, and both groups of snap-fitting balls have half of their areas protruding from the side wall of the connecting rod piece, the side walls of the two groups of snap-fitting balls close to each other are fixedly connected with connecting pieces, and the two groups of connecting pieces are fixedly connected with a limiting circular piece at one end close to each other, the two groups of limiting circular pieces are slidably snap-fitted in the cylindrical transverse groove, and the two groups of limiting circular pieces are spaced apart from each other and fixedly connected with a return spring.

[0021] Preferably, the docking structure also includes a switch rod, a ball-resisting part, two return springs and a hemispherical slot, and hemispherical slots are provided at the two ends of the cylindrical transverse groove in the connecting rod part on the inner walls on both sides of the connecting shaft end. The half area of ​​the connecting ball protruding from the connecting rod part is snapped in the bracket seat in the hemispherical slot, and barrel groove cavities communicating with the hemispherical slots are provided on both sides of the connecting shaft end. A switch rod protruding from the side wall of the connecting shaft end is slidably inserted in the barrel groove cavity, and a ball-resisting part is fixedly installed on the end of the switch rod close to the snap-in ball, and the side of the ball-resisting part facing away from the closing rod is snapped in the side end of the snap-in ball, and two return springs sleeved on the switch rod are fixedly connected between the ball-resisting part and the inner wall of the end face of the barrel groove cavity.

[0022] Preferably, the center ends of the cylindrical transverse groove, the snap-fitting ball, the connecting piece, the limiting circular piece, the barrel groove cavity, the switch rod, the ball member and the hemispherical snap-fitting groove are all on the same horizontal line, and the length of the side wall of the switch rod protruding from the connecting shaft end is the same as the radius of the snap-fitting ball.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the utility model provides a twist-free CNC active unwinding device, which has the following beneficial effects:

[0025] 1. The twist-free CNC active unwinding device detects the rotation position, speed and direction of the encoder connecting rod shaft during yarn unwinding through the encoder, and combines the servo motor to accurately control the rotation of the yarn disc bearing, thereby realizing high-precision adjustment of the yarn unwinding, so that the yarn tube rotates synchronously with the encoder connecting rod shaft, achieving the effect of yarn untwisting and reducing yarn friction, avoiding yarn wear.

[0026] 2. The twist-free CNC active unloading device can quickly and stably connect or disassemble the encoder and the encoder connecting rod shaft through the provided docking structure, which is convenient for daily maintenance and replacement of parts.

[0027] 3. The twist-free CNC active unloading device helps to maintain balance during rotation through the balancing bent rod and connecting hook arranged on the encoder connecting rod shaft. At the same time, the movable plug-in structure ensures the coaxial rotation of the yarn disk bearing and the encoder connecting rod shaft and independent separation, which improves the stability and reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Figure 2 This is a schematic diagram of the connection structure between the servo motor and the yarn drum bearing of the utility model;

[0030] Figure 3 This is a cross-sectional schematic diagram of the yarn drum support of the utility model;

[0031] Figure 4 This is a schematic diagram of the connection structure between the encoder connecting rod shaft and the encoder of the utility model;

[0032] Figure 5 for Figure 4 A local enlarged schematic diagram of point A in FIG.

[0033] Figure 6 for Figure 4 A local enlarged schematic diagram of point B in the figure.

[0034] In the figure: 1, bracket seat; 2, yarn drum bearing; 3, encoder connecting rod shaft; 4, encoder; 5, servo motor; 6, connecting rod; 7, pulley one; 8, pulley two; 9, belt; 10, connecting shaft end; 11, cylindrical groove one; 12, cylindrical groove two; 13, cylindrical groove three; 14, cylindrical groove four; 15, semi-cylindrical protrusion one; 16, semi-cylindrical protrusion two; 17, snap ring one; 18, semi-cylindrical snap groove one; 19, snap ring two; 20, semi-cylindrical snap groove two; 21, cylindrical cross-through groove; 22, snap ball; 23, connecting piece; 24, limit disc piece; 25, reset spring one; 26, barrel groove cavity; 27, switch rod; 28, ball-resisting piece; 29, reset spring two; 30, hemispherical snap groove; 31, balance bent rod; 32, connecting hook. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] See also Figure 1-6 A twist-free CNC active unloading device includes a support seat 1, on which a yarn disc support 2 is rotatably mounted through a bearing seat, and the yarn disc support 2 is used to install a yarn raw material barrel, and also includes:

[0037] The encoder connecting rod shaft 3 is movably inserted in the yarn disc bearing 2. The yarn disc bearing 2 is hollow and penetrates from top to bottom. The bottom end of the encoder connecting rod shaft 3 is fixed with an integrated connecting rod 6, and the connecting rod 6 penetrates and extends out of the bottom end of the yarn disc bearing 2.

[0038] A movable plug-in structure is arranged between the yarn disc bearing 2 and the encoder connecting rod shaft 3, and the movable plug-in structure is used to make the yarn disc bearing 2 and the encoder connecting rod shaft 3 coaxial and separately rotate independently;

[0039] The encoder 4 has a coupling end 10 rotatably disposed at its top end for being plugged into the connecting rod 6 at the bottom end of the encoder connecting rod shaft 3 and for detecting the position, speed and rotation direction of the yarn disc bearing 2 as the encoder connecting rod shaft 3 rotates;

[0040] A docking structure is provided between the coupling end 10 and the connecting rod 6, and the docking structure is used to quickly and stably connect the bottom end of the encoder connecting rod shaft 3 and quickly separate the encoder 4 from the encoder connecting rod shaft 3;

[0041] The servo motor 5 is fixedly mounted on one side of the bracket seat 1 corresponding to the yarn drum bearing 2. The bottom end of the yarn drum bearing 2 extends through the top of the bracket seat 1, and a belt transmission structure is arranged between the yarn drum bearing 2 and the servo motor 5. The encoder 4 is electrically connected to the servo motor 5 and is used for real-time adjustment of the yarn drum bearing 2 through the rotation feedback of the encoder connecting rod shaft 3.

[0042] Symmetrical balancing bent rods 31 are fixedly mounted on both sides of the top end of the encoder connecting rod shaft 3, and integrated connecting hooks 32 are fixedly mounted on the ends of the two groups of balancing bent rods 31 which are away from each other.

[0043] The belt transmission structure includes a pulley 1 7, a pulley 2 8 and a belt 9. A pulley 1 7 is fixedly installed on the bottom end of the yarn disk bearing 2 that extends downward through the top of the bracket seat 1, and the center of the pulley 1 7 is in a through shape that is aligned and communicated with the yarn disk bearing 2. The output shaft of the servo motor 5 extends downward through the top of the bracket seat 1 and is fixedly connected to the pulley 2 8. A belt 9 is sleeved between the pulley 1 7 and the pulley 2 8. The servo motor 5 can synchronously drive the yarn disk bearing 2 to rotate through the belt 9 sleeved between the pulley 1 7 and the pulley 2 8.

[0044] The bottom end of the connecting rod 6 passes through the center of the pulley 1 7 and extends out of the bottom end of the pulley 1 7 .

[0045] The movable plug-in structure includes a cylindrical groove 11, a cylindrical groove 3 13, a clamping ring 17 and a clamping ring 2 19. The center of the yarn drum bearing 2 has a cylindrical groove 11, a cylindrical groove 2 12, a cylindrical groove 3 13 and a cylindrical groove 4 14 that are connected from top to bottom, and the inner diameter of the cylindrical groove 11 is larger than the inner diameter of the cylindrical groove 2 12, the inner diameter of the cylindrical groove 2 12 is larger than the inner diameter of the cylindrical groove 3 13, and the inner diameter of the cylindrical groove 3 13 is larger than the inner diameter of the cylindrical groove 13. The inner diameter of the cylindrical groove four 14 is larger than the end face diameter of the connecting rod 6. The encoder connecting rod shaft 3 is rotatably connected with a clamping ring 17 and a clamping ring 2 19 spaced apart from each other through a bearing near the bottom end. The clamping ring 17 is adapted to the cylindrical groove one 11, and the clamping ring two 19 is adapted to the cylindrical groove three 13, that is, the clamping ring 17 and the clamping ring two 19 are respectively fitted and filled in the cylindrical groove one 11 and the cylindrical groove three 13.

[0046] The movable plug-in structure also includes a semi-cylindrical protrusion 15, a semi-cylindrical protrusion 2 16, a semi-cylindrical groove 18 and a semi-cylindrical groove 20. The outer ring side wall of the clamping ring 17 is provided with multiple groups of semi-cylindrical grooves 18 distributed in an annular manner and at equal intervals. The inner wall of the cylindrical groove 11 corresponding to the yarn drum bearing 2 is fixed with multiple groups of integrated semi-cylindrical protrusions 15 adapted to be clamped in the multiple groups of semi-cylindrical grooves 18. The outer ring side wall of the clamping ring 2 19 is provided with multiple groups of semi-cylindrical grooves 20 distributed in an annular manner and at equal intervals. The inner wall of the cylindrical groove 3 13 corresponding to the yarn drum bearing 2 is fixed with multiple groups of integrated semi-cylindrical protrusions 2 16 adapted to be clamped in the multiple groups of semi-cylindrical grooves 20. The number and position of the semi-cylindrical grooves 18 on the clamping ring 17 are the same as the number and position of the semi-cylindrical grooves 20 on the clamping ring 2 19.

[0047] The docking structure includes a cylindrical transverse groove 21, a snap-in ball 22, a limiting circular cake piece 24 and a return spring 25. The connecting rod member 6 is inserted into the middle of the connecting shaft end 10 and is provided with a cylindrical transverse groove 21 with two sides passing therethrough. The connecting rod member 6 is slidably snap-in with the snap-in balls 22 at the two side ports corresponding to the cylindrical transverse groove 21. Half of the areas of the two groups of snap-in balls 22 protrude from the side wall of the connecting rod member 6. The side walls of the two groups of snap-in balls 22 close to each other are fixedly connected with connecting members 23. The two groups of connecting members 23 close to each other at one end are fixedly connected with the limiting circular cake piece 24. The two groups of limiting circular cake pieces 24 are slidably snap-in in the cylindrical transverse groove 21. The two groups of limiting circular cake pieces 24 are spaced apart from each other and fixedly connected with a return spring 25.

[0048] The docking structure also includes a switch rod 27, a ball piece 28, a second return spring 29 and a hemispherical slot 30. Hemispherical slots 30 are provided at the two ends of the cylindrical transverse groove 21 in the connecting rod 6 on the inner walls on both sides of the coupling end 10, and the half area of ​​the connecting ball 22 protruding from the connecting rod 6 is fit and connected to the bracket seat 1 in the hemispherical slot 30. Barrel groove cavities 26 communicating with the hemispherical slot 30 are provided on both sides of the coupling end 10. A switch rod 27 protruding from the side wall of the coupling end 10 is slidably inserted in the barrel groove cavity 26, and a ball piece 28 is fixedly installed on one end of the switch rod 27 close to the connecting ball 22. The side of the ball piece 28 facing away from the closing rod 27 is fit with the side end of the connecting ball 22, and a second return spring 29 sleeved on the switch rod 27 is fixedly connected between the ball piece 28 and the inner wall of the end face of the barrel groove cavity 26.

[0049] The center ends of the cylindrical transverse groove 21, the clamping ball 22, the connecting piece 23, the limiting circular cake piece 24, the barrel groove cavity 26, the switch rod 27, the ball piece 28 and the hemispherical clamping groove 30 are all on the same horizontal line. The length of the switch rod 27 protruding from the side wall of the coupling end 10 is the same as the radius of the clamping ball 22. The two sets of switch rods 27 can be pressed into the coupling end 10 until the end surface of the switch rod 27 is flush with the outer wall of the coupling end 10, and the encoder 4 can be removed from the connecting rod 6. The two sets of switch rods 27 are removed because at this time the two sets of switch rods 27 are close to each other and will squeeze the two sets of engaging balls 22 through the two sets of ball-resisting parts 28, and the length of the switch rods 27 protruding from the coupling end 10 is the radius of the engaging balls 22, so that the engaging balls 22 can be completely retracted into the cylindrical transverse groove 21 and separated from the hemispherical engaging groove 30, and the end face of the ball-resisting part 28 is flush with the inner wall of the coupling end 10, thereby releasing the fixed connection between the connecting rod 6 and the coupling end 10.

[0050] Working principle: when the yarn is paid off, after the yarn raw material tube is fixed on the yarn reel bearing 2, the encoder connecting rod shaft 3 is inserted into the yarn reel bearing 2 from the center of the yarn raw material tube on the yarn reel bearing 2. At this time, the connecting rod 6 at the bottom end of the encoder connecting rod shaft 3 will extend through the yarn reel bearing 2 and the bottom end of the pulley 1 7, and the clamping ring 2 19 on the encoder connecting rod shaft 3 will pass through the cylinder groove 1 11 and the cylinder groove 2 12 in turn and be clamped in the cylinder groove 3 13, and the clamping ring 1 17 on the encoder connecting rod shaft 3 is clamped in the cylinder groove 1 11, and when the encoder connecting rod shaft 3 is inserted, the clamping ring 17 and the clamping ring 2 19 are clamped. The multiple groups of semi-cylindrical card slots 18 and semi-cylindrical card slots 20 are aligned and snap-fitted with the multiple groups of semi-cylindrical protrusions 15 in the cylindrical slot 11 and the multiple groups of semi-cylindrical protrusions 2 16 in the cylindrical slot 3 13. Moreover, since the encoder connecting rod shaft 3 is connected by the snap-fitting ring 17 and the snap-fitting ring 2 19 through the bearing rotation sleeve, after the encoder connecting rod shaft 3 is inserted into the yarn reel bearing 2, the yarn reel bearing 2 and the encoder connecting rod shaft 3 can rotate independently without affecting each other. Then, the encoder 4 is connected to the encoder connecting rod shaft 3, that is, the encoder 4 is plugged into the connecting rod member 6 extending from the bottom end of the encoder connecting rod shaft 3 through the top coupling end 10. The protruding engaging balls 22 on both sides of the rod 6 will be squeezed by the inner wall of the coupling end 10 after contacting the coupling end 10, and the two groups of engaging balls 22 will retract into the cylindrical transverse groove 21, that is, the two groups of limiting discs 24 approach each other along the inner wall of the cylindrical transverse groove 21 and compress the reset spring 25 to deform, and when the engaging balls 22 on both sides of the connecting rod 6 coincide with the hemispherical engaging grooves 30 opened on the inner walls of the two sides of the coupling end 10, the two groups of engaging balls 22 and the limiting discs 24 are subjected to the reaction force of the reset spring 25, thereby restoring the original state, that is, the two groups of engaging balls 22 are engaged in the hemispherical engaging grooves 30, so that the encoder connecting rod shaft 3 is fixedly connected to the encoder 4. When unwinding, the yarn is passed around the two sets of connecting hooks 32 on the two sets of balance bends 31 at the bottom of the encoder connecting rod shaft 3. When the yarn is unwinding, the encoder connecting rod shaft 3 will be pulled and the encoder connecting rod shaft 3 will be driven to rotate. At this time, the encoder 4 receives the position, speed and rotation direction of the encoder connecting rod shaft 3 during rotation, and controls the driving servo motor 5 to drive the yarn disc bearing 2 and the encoder connecting rod shaft 3 to rotate synchronously through the fart belt transmission structure, so that the yarn tube rotates synchronously with the encoder connecting rod shaft 3, thereby achieving the effect of yarn untwisting and reducing yarn friction, thereby avoiding yarn wear.After the discharge is completed, when the encoder 4 is removed, it is only necessary to press the two sets of switch rods 27 into the coupling end 10, and until the end faces of the switch rods 27 are flush with the outer wall of the coupling end 10, the encoder 4 can be removed from the connecting rod member 6, because at this time the two sets of switch rods 27 are close to each other, which will squeeze the two sets of engaging balls 22 through the two sets of ball members 28, and the length of the switch rods 27 protruding from the coupling end 10 is the radius of the engaging ball 22, so that the engaging ball 22 can be completely retracted into the cylindrical transverse groove 21 and separated from the hemispherical engaging groove 30, and the end face of the ball member 28 is flush with the inner wall of the coupling end 10, thereby releasing the fixed connection between the connecting rod member 6 and the coupling end 10.

[0051] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A twist-free CNC active unloading device, comprising a support seat (1), on which a yarn drum support (2) is rotatably mounted via a bearing seat, and the yarn drum support (2) is used to mount a yarn raw material drum, characterized in that: Also includes: An encoder connecting rod shaft (3) is movably inserted into a yarn drum bearing (2), wherein the yarn drum bearing (2) is hollow and penetrates from top to bottom, and an integrated connecting rod member (6) is fixedly arranged at the bottom end of the encoder connecting rod shaft (3), and the connecting rod member (6) penetrates and extends out of the bottom end of the yarn drum bearing (2); A movable plug-in structure is arranged between the yarn disc bearing (2) and the encoder connecting rod shaft (3), and the movable plug-in structure is used to make the yarn disc bearing (2) and the encoder connecting rod shaft (3) coaxial and separately rotate independently; An encoder (4) having a coupling end (10) rotatably disposed at its top end for being plugged into a connecting rod (6) at the bottom end of the encoder connecting rod shaft (3) and for detecting the position, rotation speed and rotation direction of the yarn drum bearing (2) as the encoder connecting rod shaft (3) rotates; A docking structure is provided between the coupling end (10) and the connecting rod (6), the docking structure being used to quickly and stably connect the bottom end of the encoder connecting rod shaft (3) and to quickly detach the encoder (4) from the encoder connecting rod shaft (3); A servo motor (5) is fixedly mounted on a side of the support seat (1) corresponding to the yarn drum bearing (2); the bottom end of the yarn drum bearing (2) extends through the top of the support seat (1), and a belt transmission structure is arranged between the yarn drum bearing (2) and the servo motor (5); the encoder (4) is electrically connected to the servo motor (5) and is used for real-time adjustment of the yarn drum bearing (2) through the rotation feedback of the encoder connecting rod shaft (3).

2. The twist-free CNC active unwinding device according to claim 1, characterized in that: Symmetrical balancing bent rods (31) are fixedly mounted on both sides of the top end of the encoder connecting rod shaft (3), and integrated connecting hooks (32) are fixedly mounted on the ends of the two groups of balancing bent rods (31) that are away from each other.

3. The twist-free CNC active unwinding device according to claim 1, characterized in that: The belt transmission structure comprises a pulley 1 (7), a pulley 2 (8) and a belt (9); the pulley 1 (7) is fixedly mounted on the bottom end of the yarn disc support (2) which extends downward through the top of the bracket seat (1), and the center of the pulley 1 (7) is in a through shape aligned with and communicated with the yarn disc support (2); the output shaft of the servo motor (5) extends downward through the top of the bracket seat (1) and is fixedly connected to the pulley 2 (8); a belt (9) is sleeved between the pulley 1 (7) and the pulley 2 (8).

4. The twist-free CNC active unwinding device according to claim 3 is characterized in that: The bottom end of the connecting rod (6) passes through the center of the pulley one (7) and extends out of the bottom end of the pulley one (7).

5. The twist-free CNC active unloading device according to claim 1 is characterized in that: The movable plug-in structure comprises a cylindrical groove 1 (11), a cylindrical groove 3 (13), a clamping ring 1 (17) and a clamping ring 2 (19); the center of the yarn drum support (2) is provided with a cylindrical groove 1 (11), a cylindrical groove 2 (12), a cylindrical groove 3 (13) and a cylindrical groove 4 (14) which are connected from top to bottom, and the inner diameter of the cylindrical groove 1 (11) is larger than the inner diameter of the cylindrical groove 2 (12), the inner diameter of the cylindrical groove 2 (12) is larger than the inner diameter of the cylindrical groove 3 (13), and the inner diameter of the cylindrical groove 3 (13) is larger than the inner diameter of the cylindrical groove 4 (14). The inner diameter of the cylindrical groove four (14) is larger than the end face diameter of the connecting rod (6); the encoder connecting rod shaft (3) is rotatably connected to a clamping ring one (17) and a clamping ring two (19) spaced apart from each other at upper and lower positions through a bearing near the bottom end; the clamping ring one (17) is adapted to the cylindrical groove one (11), and the clamping ring two (19) is adapted to the cylindrical groove three (13), that is, the clamping ring one (17) and the clamping ring two (19) are respectively fitted and filled in the cylindrical groove one (11) and the cylindrical groove three (13).

6. The twist-free CNC active unwinding device according to claim 5, characterized in that: The movable plug-in structure also includes a semi-cylindrical protrusion (15), a semi-cylindrical protrusion (16), a semi-cylindrical groove (18) and a semi-cylindrical groove (20). The outer ring side wall of the snap-in ring (17) is provided with a plurality of groups of semi-cylindrical grooves (18) distributed in an annular shape and at equal intervals. The inner wall of the corresponding cylindrical groove (11) of the yarn drum support (2) is fixed with a plurality of groups of integrated semi-cylindrical protrusions (15) adapted to be snap-fitted into the plurality of groups of semi-cylindrical grooves (18). The outer ring side wall of the second circular ring (19) is provided with a plurality of groups of semi-cylindrical grooves (20) which are equidistantly distributed in an annular shape. The inner wall of the corresponding cylindrical groove (13) of the yarn drum support (2) is provided with a plurality of groups of integrated semi-cylindrical protrusions (16) which are adapted to be snapped into the plurality of groups of semi-cylindrical grooves (20). The number and position of the semi-cylindrical grooves (18) provided on the snap-fitting circular ring (17) are the same as the number and position of the semi-cylindrical grooves (20) provided on the snap-fitting circular ring (19).

7. The twist-free CNC active unwinding device according to claim 1, characterized in that: The docking structure comprises a cylindrical transverse groove (21), a clamping ball (22), a limiting circular disc piece (24) and a return spring (25); the middle of the connecting rod (6) corresponding to the connecting shaft end (10) is provided with a cylindrical transverse groove (21) penetrating on both sides, and the connecting rod (6) is slidably clamped with clamping balls (22) at both ends of the cylindrical transverse groove (21), and half of the area of ​​the two groups of clamping balls (22) protrudes from the side wall of the connecting rod (6); the side walls of the two groups of clamping balls (22) close to each other are fixedly connected with connecting pieces (23), and the two groups of connecting pieces (23) close to each other are fixedly connected with the limiting circular disc piece (24); the two groups of the limiting circular disc pieces (24) are slidably clamped in the cylindrical transverse groove (21), and the two groups of the limiting circular disc pieces (24) are spaced from each other and fixedly connected with a return spring (25).

8. The twist-free CNC active unwinding device according to claim 7, characterized in that: The docking structure further comprises a switch rod (27), a ball-resisting member (28), a second return spring (29) and a hemispherical slot (30). The inner walls on both sides of the coupling end (10) are provided with hemispherical slots (30) at both ends of the cylindrical transverse groove (21) in the connecting rod (6), and the half area of ​​the engaging ball (22) protruding from the connecting rod (6) is fitted and engaged with the bracket seat (1) in the hemispherical slot (30). The coupling end (10) is provided with a plurality of springs on both sides that communicate with the hemispherical slot (30). A barrel groove cavity (26) is provided, wherein a switch rod (27) protruding from the side wall of the coupling end (10) is slidably inserted in the barrel groove cavity (26), and a ball-resisting member (28) is fixedly installed at one end of the switch rod (27) close to the clamping ball (22), and the side of the ball-resisting member (28) facing away from the closing rod (27) is in contact with the side end of the clamping ball (22), and a return spring (29) sleeved on the switch rod (27) is fixedly connected between the ball-resisting member (28) and the inner wall of the end surface of the barrel groove cavity (26).

9. The twist-free CNC active unwinding device according to claim 8, characterized in that: The central ends of the cylindrical transverse groove (21), the engaging ball (22), the connecting piece (23), the limiting circular disc piece (24), the barrel groove cavity (26), the switch rod (27), the ball-resisting piece (28) and the hemispherical engaging groove (30) are all on the same horizontal line, and the length of the switch rod (27) protruding from the side wall of the coupling end (10) is the same as the radius of the engaging ball (22).

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