High-frequency yarn adjusting and feeding mechanism and method and circular machine

Abstract

The invention relates to the technical field of knitting equipment, in particular to a high-frequency yarn adjusting and feeding mechanism and method and a circular knitting machine. The high-frequency yarn adjusting and feeding mechanism comprises a yarn selecting assembly, a centrifugal stirring assembly and a needle selecting control assembly. The yarn selecting assembly comprises a plurality of yarn selecting pieces capable of swinging, and yarn guide holes in the yarn selecting pieces can be switched between the yarn feeding position and the non-yarn-feeding position. The centrifugal shifting assembly comprises a rotating sleeve and a shifting piece in a guide groove of the rotating sleeve; and the shifting piece automatically keeps a reset state of overturning outwards by utilizing a rotating centrifugal force. The needle selection control assembly is provided with a fixed needle selector and a needle selection pin. In the working process, if the needle selection pin executes the selection action, the passing poking piece is pushed into the action state of overturning inwards; the shifting pieces rotate along with the rotating sleeve and abut against the corresponding yarn selecting pieces to drive the yarn selecting pieces to swing to complete yarn changing; and then the shifting piece automatically resets under the action of centrifugal force. According to the invention, the mechanical response delay during high-frequency wire changing is overcome, high-speed accurate switching in an extremely short period is realized, and the high-quality production requirement of multicolor complex patterns is met.

Description

Technical Field

[0001] This invention relates to the field of knitting equipment technology, and in particular to a high-frequency yarn feeding mechanism and method, and a circular knitting machine. Background Technology

[0002] When circular knitting machines weave multi-colored fabrics, they rely on a yarn feeding mechanism to switch between different yarns. Existing yarn feeding mechanisms have multiple feeding fingers mounted parallel to each other on the same rotating shaft. Each finger is controlled by an independent drive device at the rear end to swing up and down around the shaft, moving the front yarn feeder to the feeding position to guide a specific yarn to participate in the weaving. However, this structure has significant mechanical limitations. Due to the mechanical characteristics of coaxial rotation, the feeding fingers are slow to start and stop during high-speed yarn changes due to their large rotational inertia. It is difficult to complete rapid and accurate reciprocating switching within a very short weaving cycle. Its inherent physical response bottleneck severely restricts the increase in yarn changing frequency and cannot meet the high-speed, high-quality production requirements of modern textile industry for multi-colored and complex patterns. Therefore, it is urgent to develop a yarn feeding mechanism with high dynamic response. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a high-frequency yarn feeding mechanism and method and a circular knitting machine that can adapt to high-speed and precise switching within extremely short knitting cycles.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a high-frequency yarn feeding mechanism, comprising:

[0005] The yarn selection assembly includes several yarn selection plates that are oscillatingly mounted around the same central axis. Each yarn selection plate has a guide hole for the corresponding yarn to pass through. The yarn selection plates are configured to switch their respective guide holes between a yarn feeding position and a non-yarn feeding position by oscillating around the central axis.

[0006] The centrifugal actuation assembly includes a rotating sleeve fitted around the yarn selection assembly and multiple paddles movably disposed on the side wall of the rotating sleeve. Each paddle has a guide groove penetrating its inner and outer walls on the side wall of the rotating sleeve, and each paddle is rotatably connected within its corresponding guide groove. Each paddle has a reset state where it flips outward and protrudes from the outer wall of the rotating sleeve under the centrifugal force generated by the rotation of the rotating sleeve, and an action state where it flips inward and protrudes towards the interior of the rotating sleeve under external force. Each yarn selection paddle has an avoidance notch at the pushing path of the paddle.

[0007] An electric spindle, with a rotating sleeve connected to the electric spindle drive;

[0008] The needle selection control component includes a fixedly installed needle selector, which is provided with needle selection feet corresponding to the movement trajector of each of the aforementioned paddles;

[0009] When the rotating sleeve drives any of the paddles in the reset state to pass the needle selector, if the needle selector performs a selection action, the paddle is pushed into the action state. In the action state, the paddle, while rotating with the rotating sleeve, pushes against the corresponding yarn selector in the yarn selector assembly, driving the yarn selector to swing and switch the position of the corresponding yarn guide hole. Subsequently, the paddle disengages from pushing against the yarn selector and automatically returns to the reset state under the action of centrifugal force.

[0010] Furthermore, the needle selection control component includes a first needle selector and a second needle selector respectively fixedly disposed on both sides of the axial direction of the rotating sleeve. Each of the first and second needle selectors has multiple needle selection feet, and each needle selection foot corresponds to the movement trajectory of a lever. When the lever moves past the first needle selector, if it is selected by the needle selection foot of the first needle selector corresponding to the movement trajectory of the lever, the lever drives the corresponding yarn selection piece to swing to the yarn feeding position. When the lever moves past the second needle selector, if it is selected by the needle selection foot of the second needle selector corresponding to the movement trajectory of the lever, the lever drives the corresponding yarn selection piece to swing to the non-yarn feeding position.

[0011] Furthermore, a limiting hole is formed on the paddle, and a limiting shaft is fixedly provided in the guide groove. The limiting shaft passes through the limiting hole. The cooperation between the limiting shaft and the limiting hole restricts the swing angle of the paddle, so as to define the extreme positions of the reset state and the action state.

[0012] Furthermore, the yarn selection assembly also includes a damping positioning structure, which is configured to provide a damping force to the yarn selection plate. The magnitude of the damping force is set such that when the paddle does not push against the yarn selection plate, it is sufficient to keep the position of the yarn selection plate stable; and when the paddle pushes against the yarn selection plate, it is less than the force required for the paddle to drive the yarn selection plate to swing.

[0013] Furthermore, it also includes a magnetic coupler, the electric spindle is used to output power, and the rotating sleeve is connected to the electric spindle via the magnetic coupler; the magnetic coupler includes an active magnetic rotor and a driven magnetic rotor respectively disposed at the output end of the electric spindle and the input end of the rotating sleeve, the active magnetic rotor and the driven magnetic rotor have no physical contact, and torque is transmitted through magnetic field coupling.

[0014] Furthermore, the yarn guide holes on each of the yarn selector plates are staggered along the height direction to prevent the yarns from tangling together during the oscillation of the yarn selector plates.

[0015] Furthermore, the yarn selection assembly includes a first yarn selection plate and a second yarn selection plate; the paddles on the rotating sleeve are arranged in three axial positions along its axial direction, and at each axial position, two paddles are symmetrically distributed along the circumferential direction, so that a total of six paddles are provided on the rotating sleeve; the first needle selector and the second needle selector are respectively provided with three needle selection feet corresponding to the three axial positions, and the needle selection feet selectively push the corresponding paddles inward.

[0016] A high-frequency yarn feeding method, based on the aforementioned high-frequency yarn feeding mechanism, includes:

[0017] S1, the rotating sleeve rotates around the central axis, causing multiple paddles disposed on the side wall of the rotating sleeve to rotate synchronously with it; under the action of the centrifugal force generated by the rotation, each paddle remains in the reset state of being flipped outward and protruding from the outer side wall of the rotating sleeve;

[0018] S2, The control system determines whether the yarn needs to be switched based on the current yarn selection command;

[0019] If switching is required, the needle selection pin on the needle selector corresponding to the movement trajectory of the lever is selected; if switching is not required, the needle selection pin remains stationary.

[0020] S3, If the selection pin performs the selection action, the selection pin pushes the passing paddle inward to overcome the centrifugal force and pushes the paddle from the reset state into an action state in which it flips inward and protrudes towards the inside of the rotating sleeve.

[0021] If the needle selection pin is not selected, the lever remains in the reset state and passes directly past the needle selector;

[0022] S4, the paddle in the aforementioned action state continues to rotate with the rotating sleeve. When it moves to contact the corresponding yarn selecting piece in the yarn selecting assembly, the paddle pushes against the yarn selecting piece, driving the yarn selecting piece to swing around the central axis. Through the swing, the yarn guide hole on the yarn selecting piece is switched from its current position to a yarn feeding position or a non-yarn feeding position. During this process, other yarn selecting pieces that are not pushed remain in their original positions.

[0023] S5, after the pushing of the yarn selection plate is completed, the paddle disengages from the contact with the yarn selection plate; subsequently, under the action of the centrifugal force generated by the continued rotation of the rotating sleeve, the paddle automatically flips from the action state to the reset state, waiting for the next yarn selection cycle.

[0024] A circular knitting machine includes the aforementioned high-frequency yarn feeding mechanism.

[0025] As can be seen from the above description of the present invention, compared with the prior art, the high-frequency yarn feeding mechanism and method and circular knitting machine provided by the present invention have the following advantages:

[0026] 1. This application employs a driving method that separates the "centrifugal actuation component" and the "yarn selection component." The yarn selection plate is only momentarily actuated when switching is required, remaining stationary at other times. The driving action is accomplished by the kinetic energy of a continuously high-speed rotating sleeve and its actuating plate, eliminating the need for frequent acceleration and deceleration. This design solves the start-stop problem caused by slow mechanical response during high-frequency yarn changes in existing technologies. It can adapt to high-speed and precise switching within extremely short weaving cycles, meeting the high-quality production needs of modern textile industries for multi-color and complex patterns.

[0027] 2. The paddle in this application utilizes the centrifugal force generated by the high-speed rotation of the rotating sleeve as the reset power, enabling the paddle to automatically maintain its outward-flipped reset state without external force. It only enters the active state when acted upon by the selected pin and automatically springs back after disengagement. This design eliminates the need for traditional spring reset mechanisms or additional reverse drive units, simplifying the mechanical structure, reducing the number of parts, effectively avoiding fatigue failure and other malfunctions, and significantly improving the stability and service life of the mechanism under high-speed operating conditions.

[0028] 3. By setting avoidance notches on the yarn selection plates, the pawl in action can smoothly pass through the empty areas of non-target yarn selection plates during the rotation of the rotating sleeve, only pushing against the solid part of the currently selected yarn selection plate. This spatial reuse mechanism effectively solves the problem of spatial interference between multiple yarn selection plates on the same rotation path, realizing independent and precise control of each yarn selection plate and ensuring the accuracy of the yarn changing action.

[0029] 4. By setting a first needle selector and a second needle selector on both sides of the rotating sleeve axis respectively, the yarn selection plate is driven to swing to the "yarn feeding position" and the "non-yarn feeding position" respectively. This physically separated bidirectional control method allows the "taking in" and "taking out" actions of the yarn to be triggered independently by the needle selectors at different positions. The control logic is clear and unambiguous, avoiding signal confusion that may occur with single-point control, and further improving the accuracy of the yarn changing process. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a high-frequency yarn feeding mechanism according to the present invention.

[0031] Figure 2 This is a schematic diagram of the operating state of the centrifugal agitator component of the present invention.

[0032] Figure 3 This is a schematic diagram of the operation state of the centrifugal agitator component of the present invention.

[0033] Figure 4This is a schematic diagram of the operating state of the centrifugal agitator component of the present invention.

[0034] Figure 5 This is a schematic diagram of the first yarn sheet structure of the present invention.

[0035] Figure 6 This is a schematic diagram of the second yarn sheet structure of the present invention.

[0036] Figure 7 This is a schematic diagram of the rotating sleeve structure of the present invention.

[0037] Figure 8 This is a schematic diagram of the selected yarn sheet state for the present invention.

[0038] Figure 9 The second illustration shows the state of the selected yarn sheet in this invention.

[0039] Figure 10 The third illustration shows the state of the selected yarn sheet in this invention.

[0040] Figure 11 The fourth diagram illustrates the state of the selected yarn sheet in this invention.

[0041] Figure 12 The fifth diagram illustrates the state of the selected yarn sheet in this invention.

[0042] Figure 13 This is a schematic diagram of a high-frequency yarn feeding mechanism of the present invention applied to a circular knitting machine.

[0043] Figure 14 This is a schematic diagram of an embodiment of the damping positioning structure of the present invention.

[0044] Figure 15 This is a schematic diagram of the damping positioning structure in Embodiment 2 of the present invention.

[0045] The markings in the diagram correspond as follows: 1. Yarn selection component; 11. Yarn selection plate; 11a. First yarn selection plate; 11b. Second yarn selection plate; 12. Yarn guide hole; 13. Clearance notch; 14. Rotating hole; 15. Rotating shaft; 16. Fixed friction plate; 2. Centrifugal actuation component; 21. Rotating sleeve; 211. Guide groove; 212. Limiting shaft; 22. Paddle; 221. Upper paddle; 222. Middle paddle; 2 23. Lower layer paddle; 23. Limiting elongated hole; 3. Needle selection control assembly; 3a. First needle selector; 3b. Second needle selector; 31. Needle selection pin; 311a. Pin 1; 312a. Pin 2; 313a. Pin 3; 311b. Pin 4; 312b. Pin 5; 313b. Pin 6; 4. Electric spindle; 5. Magnetic coupler; 51. Active magnetic rotor; 52. Driven magnetic rotor. Detailed Implementation

[0046] The present invention will be further described below through specific embodiments.

[0047] Reference Figures 1 to 15 As shown, this application provides a high-frequency yarn feeding mechanism, mainly used in circular knitting machines and other knitting equipment, aiming to solve the problem of slow response caused by large rotational inertia during high-speed yarn changing in existing technologies. It includes a yarn selection component 1, a centrifugal actuation component 2, and a needle selection control component 3.

[0048] The yarn selection assembly 1 includes a plurality of yarn selection plates 11, which are oscillatingly mounted around the same central axis. The number of yarn selection plates 11 is set according to the number of yarn colors to be switched. Each yarn selection plate 11 has a guide hole 12 for the corresponding yarn to pass through. The yarn selection plates 11 are configured to oscillate around the central axis, causing their respective guide holes 12 to switch between a yarn feeding position and a non-yarn feeding position. When the guide hole 12 is in the yarn feeding position, the corresponding yarn is guided into the weaving area to participate in weaving; when it is in the non-yarn feeding position, the yarn leaves the weaving area.

[0049] To prevent the yarns on different yarn selector plates 11 from tangling during the swinging process, the yarn guide holes 12 on each yarn selector plate 11 are staggered along the height direction. Each yarn selector plate 11 has a clearance notch 13 at the pushing path of the lever 22. When the lever 22 is in the active state and rotates with the rotating sleeve 21, the lever 22 pushes against the solid part of the currently selected yarn selector plate 11 to drive it to swing, and passes through the clearance notch 13 on other unselected yarn selector plates 11, thereby avoiding interference with other yarn selector plates 11.

[0050] The yarn selection assembly 1 also includes a damping positioning structure configured to provide damping force to the yarn selection plate 11. The magnitude of this damping force is set such that when the lever 22 is not pushing the yarn selection plate 11, the damping force is sufficient to maintain the stable position of the yarn selection plate 11, preventing it from accidentally shifting due to vibration; when the lever 22 pushes the yarn selection plate 11, the damping force is less than the force required for the lever 22 to drive the yarn selection plate 11 to swing, ensuring that the lever 22 can smoothly push the yarn selection plate 11 to complete the switching action. The damping positioning structure of this application has the following embodiments:

[0051] Example 1 of damping positioning structure (reference) Figure 14 As shown), the yarn selector 11 has a rotating hole 14, and its central axis is correspondingly formed on a rotating shaft 15. The rotating hole 14 of the yarn selector 11 is fitted onto the rotating shaft 15. The rotating hole 14 of the yarn selector 11 and the rotating shaft 15 are connected by friction rotation. The static friction provided by the friction rotation connection is used to maintain the yarn selector 11 at the current rotation angle position. The maximum static friction is less than the force required for the lever 22 to drive the yarn selector 11 to swing.

[0052] Example 2 of damping positioning structure (reference) Figure 15As shown), a fixed friction plate 16 is provided on one side of the yarn selector 11. The fixed friction plate 16 is fixedly set and perpendicular to the central axis. The yarn selector 11 and the fixed friction plate 16 are in frictional contact. The static friction provided by the frictional contact is used to maintain the yarn selector 11 at the current rotation angle position. The maximum static friction is less than the force required for the lever 22 to drive the yarn selector 11 to swing.

[0053] The centrifugal actuation assembly 2 includes a rotating sleeve 21 sleeved around the yarn selection assembly 1, and multiple paddles 22 movably disposed on the side wall of the rotating sleeve 21. Each paddle 22 has a guide groove 211 extending through its inner and outer walls on the side wall of the rotating sleeve 21. Each paddle 22 is rotatably connected within its corresponding guide groove 211. The paddles 22 have two states: In the reset state, under the centrifugal force generated by the rotation of the rotating sleeve 21, the paddles 22 flip outwards and protrude from the outer wall of the rotating sleeve 21. In the operating state, under external force, the paddles 22 flip inwards and protrude towards the interior of the rotating sleeve 21. To limit the swing angle of the paddles 22 and clearly define the limit positions of the reset and operating states, a limiting elongated hole 23 is provided on the paddles 22, and a limiting shaft 212 is fixedly disposed within the guide groove 211. The limiting shaft 212 passes through the limiting elongated hole 23. Through the cooperation between the limiting shaft 212 and the limiting elongated hole 23, the swing range of the lever 22 is limited.

[0054] The needle selection control assembly 3 includes a fixedly installed needle selector. The needle selector is provided with needle selection feet 31 corresponding to the movement trajectory of each lever 22.

[0055] In a preferred embodiment of the present invention, the yarn selection component 1 includes a first yarn selection plate 11a and a second yarn selection plate 11b. The paddles 22 on the rotating sleeve 21 are arranged in three axial positions along its axial direction, and at each axial position, two paddles 22 are symmetrically distributed along the circumferential direction, so that a total of six paddles 22 are provided on the rotating sleeve 21. This layout improves space utilization and yarn selection efficiency.

[0056] The needle selection control assembly 3 includes a first needle selector 3a and a second needle selector 3b, which are respectively fixedly disposed on both sides of the axial direction of the rotating sleeve 21. Each of the first needle selector 3a and the second needle selector 3b is provided with a plurality of needle selection feet 31, and the needle selection feet 31 correspond to the movement trajectory of a lever 22. When the lever 22 moves past the first needle selector 3a, if it is selected by the needle selection foot 31 of the first needle selector 3a corresponding to the movement trajectory of the lever 22, the lever 22 drives the corresponding yarn selection piece 11 to swing to the yarn feeding position. When the lever 22 moves past the second needle selector 3b, if it is selected by the needle selection foot 31 of the second needle selector 3b corresponding to the movement trajectory of the lever 22, the lever 22 drives the corresponding yarn selection piece 11 to swing to the non-yarn feeding position.

[0057] To achieve high-speed and stable operation, this mechanism also includes an electric spindle 4 and a magnetic coupler 5. The electric spindle 4 is used to output power, and the rotating sleeve 21 is connected to the electric spindle 4 via the magnetic coupler 5. The magnetic coupler 5 includes an active magnetic rotor 51 and a driven magnetic rotor 52, respectively located at the output end of the electric spindle 4 and the input end of the rotating sleeve 21. There is no physical contact between the active magnetic rotor 51 and the driven magnetic rotor 52; torque is transmitted entirely through magnetic field coupling. This non-contact transmission eliminates mechanical wear, reduces vibration, and is particularly suitable for high-speed operation scenarios.

[0058] Based on the above mechanism, the present invention also provides a high-frequency yarn feeding method, the specific steps of which are as follows:

[0059] S1: The electric spindle 4 drives the rotating sleeve 21 to rotate at high speed around the central axis, causing multiple paddles 22 disposed on the side wall of the rotating sleeve 21 to rotate synchronously with it. Under the action of centrifugal force generated by the rotation, each paddle 22 remains in the reset state of being flipped outward and protruding from the outer side wall of the rotating sleeve 21.

[0060] S2: The control system determines whether yarn switching is required based on the current yarn selection command. If switching is required, the control system performs a selection action on the needle selector corresponding to the movement trajectory of the pick 22; if switching is not required, the needle selector 31 remains stationary.

[0061] S3: If the needle selection pin 31 performs the selection action, the needle selection pin 31 pushes the passing lever 22 inward, overcoming centrifugal force to push the lever 22 from the reset state into an action state in which it flips inward and protrudes towards the inside of the rotating sleeve 21. If the needle selection pin 31 does not perform the selection action, the lever 22 remains in the reset state and passes directly past the needle selector.

[0062] S4: The lever 22, in the active state, continues to rotate with the rotating sleeve 21. When it moves to contact the corresponding yarn selector 11 in the yarn selector assembly 1, the lever 22 pushes against the solid part of the yarn selector 11, driving the yarn selector 11 to swing around the central axis. Through this swing, the yarn guide hole 12 on the yarn selector 11 is switched from its current position to the yarn feeding position or the non-yarn feeding position. During this process, other yarn selectors 11 that are not pushed remain in their original positions.

[0063] S5: After pushing the yarn selector 11 is completed, the paddle 22 disengages from the yarn selector 11. Subsequently, under the centrifugal force generated by the continued rotation of the rotating sleeve 21, the paddle 22 automatically flips from the active state to the reset state, waiting for the next yarn selection cycle.

[0064] In a preferred embodiment of the present invention, the paddles 22 on the rotating sleeve 21 are arranged in three axial positions along its axial direction, and at each axial position, two paddles 22 are symmetrically distributed along the circumferential direction, so that a total of six paddles 22 are provided on the rotating sleeve 21. The rotating sleeve is divided into three height positions from top to bottom. The two paddles at the top are defined as upper paddles 221, the two paddles in the middle are defined as middle paddles 222, and the two paddles at the bottom are defined as lower paddles 223. The first needle selector 3a has three needle pins, defined from top to bottom as needle pin one 311a, needle pin two 312a, and needle pin three 313a; the second needle selector 3b has three needle pins, defined from top to bottom as needle pin four 311b, needle pin five 312b, and needle pin six 313b.

[0065] This preferred embodiment has the following operating states.

[0066] ①.Reference Figure 8 The action state shown:

[0067] The first needle selector 3a has only needle pin 312a selected, and the second needle selector 3b has only needle pin 311b selected. At this time, the middle layer selector 222, located in the middle layer, is selected by needle pin 312a, driving the second yarn selector 11b to the yarn feeding position; the upper layer selector 221, located in the top layer, is selected by needle pin 311b, driving the first yarn selector 11a to the non-yarn feeding position. That is, the circular knitting machine feeds yarn from the second yarn selector 11b.

[0068] ②.Reference Figure 9 The action state shown:

[0069] The first needle selector 3a has only needle three 313a selected, and the second needle selector 3b has only needle five 312b selected. At this time, the bottom layer selector 223 is selected by needle three 313a, driving the first yarn selector 11a to the yarn feeding position; the middle layer selector 222 is selected by needle five 312b, driving the second yarn selector 11b to the non-yarn feeding position. That is, the circular knitting machine feeds the yarn on the first yarn selector 11a.

[0070] ③.Reference Figure 10 The action state shown:

[0071] The first needle selector 3a has only needle 1 (311a) selected, and the second needle selector 3b has only needle 6 (313b) selected. At this time, the uppermost selector 221 is selected by needle 1 (311a), driving the second yarn selector 11b to the yarn feeding position; the lowermost selector 223 is selected by needle 6 (313b), driving the first yarn selector 11a to the non-feeding position. That is, the circular knitting machine feeds yarn from the second yarn selector 11b.

[0072] ④.Reference Figure 11 The action state shown:

[0073] All needle selection pins 31 on the first needle selector 3a are selected, while all needle selection pins 31 on the second needle selector 3b are deselected. At this time, all the paddles 22 passing through the first needle selector are selected, so that both the first yarn selection plate 11a and the second yarn selection plate 11b are in the yarn feeding position. That is, the circular knitting machine simultaneously feeds yarn into the first yarn selection plate 11a and the second yarn selection plate 11b.

[0074] ⑤.Reference Figure 12 The action state shown:

[0075] All needle selection pins 31 on the first needle selector 3a are in an unselected state, while all needle selection pins 31 on the second needle selector 3b are in a selected state. At this time, all the paddles 22 passing through the second needle selector will be selected, so that both the first yarn selection plate 11a and the second yarn selection plate 11b are in a non-feeding position. That is, neither the yarn from the first yarn selection plate 11a nor the yarn from the second yarn selection plate 11b is fed in.

[0076] refer to Figure 13 As shown, the present invention also provides a circular knitting machine that includes the aforementioned high-frequency yarn feeding mechanism. By employing this mechanism, the circular knitting machine can achieve rapid switching of multi-color yarns with low inertia and high dynamic response under high-speed operation, significantly improving the production quality and efficiency of complex patterned fabrics.

[0077] The above is only one specific embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing the protection scope of the present invention.

Claims

1. A high-frequency yarn feeding mechanism, characterized in that, include: The yarn selection assembly includes several yarn selection plates that are oscillatingly mounted around the same central axis. Each yarn selection plate has a guide hole for the corresponding yarn to pass through. The yarn selection plates are configured to switch their respective guide holes between a yarn feeding position and a non-yarn feeding position by oscillating around the central axis. The centrifugal actuation assembly includes a rotating sleeve fitted around the yarn selection assembly and multiple paddles movably disposed on the side wall of the rotating sleeve. Each paddle has a guide groove penetrating its inner and outer walls on the side wall of the rotating sleeve, and each paddle is rotatably connected within its corresponding guide groove. Each paddle has a reset state where it flips outward and protrudes from the outer wall of the rotating sleeve under the centrifugal force generated by the rotation of the rotating sleeve, and an action state where it flips inward and protrudes towards the interior of the rotating sleeve under external force. Each yarn selection paddle has an avoidance notch at the pushing path of the paddle. An electric spindle, with a rotating sleeve connected to the electric spindle drive; The needle selection control component includes a fixedly installed needle selector, which is provided with needle selection feet corresponding to the movement trajector of each of the aforementioned paddles; When the rotating sleeve drives any of the paddles in the reset state to pass the needle selector, if the needle selector performs a selection action, the paddle is pushed into the action state. In the action state, the paddle, while rotating with the rotating sleeve, pushes against the corresponding yarn selector in the yarn selector assembly, driving the yarn selector to swing and switch the position of the corresponding yarn guide hole. Subsequently, the paddle disengages from pushing against the yarn selector and automatically returns to the reset state under the action of centrifugal force.

2. The high-frequency yarn feeding mechanism according to claim 1, characterized in that: The needle selection control component includes a first needle selector and a second needle selector, which are respectively fixedly disposed on both sides of the axial direction of the rotating sleeve. Each of the first and second needle selectors has multiple needle selection feet, and each needle selection foot corresponds to the movement trajectory of a lever. When the lever moves past the first needle selector, if it is selected by the needle selection foot of the first needle selector corresponding to the movement trajectory of the lever, the lever drives the corresponding yarn selection piece to swing to the yarn feeding position. When the lever moves past the second needle selector, if it is selected by the needle selection foot of the second needle selector corresponding to the movement trajectory of the lever, the lever drives the corresponding yarn selection piece to swing to the non-yarn feeding position.

3. The high-frequency yarn feeding mechanism according to claim 1, characterized in that: The paddle has a limiting hole, and a limiting shaft is fixed in the guide groove. The limiting shaft passes through the limiting hole. The cooperation between the limiting shaft and the limiting hole restricts the swing angle of the paddle, thereby defining the extreme positions of the reset state and the action state.

4. The high-frequency yarn feeding mechanism according to claim 1, characterized in that: The yarn selection assembly further includes a damping positioning structure, which is configured to provide a damping force to the yarn selection plate. The magnitude of the damping force is set such that when the paddle does not push against the yarn selection plate, it is sufficient to maintain the position of the yarn selection plate stably; and when the paddle pushes against the yarn selection plate, it is less than the force required for the paddle to drive the yarn selection plate to swing.

5. The high-frequency yarn feeding mechanism according to claim 1, characterized in that: It also includes a magnetic coupler, the electric spindle is used to output power, and the rotating sleeve is connected to the electric spindle through the magnetic coupler; the magnetic coupler includes an active magnetic rotor and a driven magnetic rotor respectively disposed at the output end of the electric spindle and the input end of the rotating sleeve, the active magnetic rotor and the driven magnetic rotor have no physical contact, and the torque is transmitted through magnetic field coupling.

6. The high-frequency yarn feeding mechanism according to claim 1, characterized in that: The yarn guide holes on each of the yarn selector plates are staggered along the height direction to prevent the yarns from tangling together during the swinging of the yarn selector plates.

7. A high-frequency yarn feeding mechanism according to claim 2, characterized in that: The yarn selection assembly includes a first yarn selection plate and a second yarn selection plate; the paddles on the rotating sleeve are arranged in three axial positions along its axis, and at each axial position, two paddles are symmetrically distributed along the circumferential direction, so that a total of six paddles are provided on the rotating sleeve; the first needle selector and the second needle selector are respectively provided with three needle selection feet corresponding to the three axial positions, and the needle selection feet selectively push the corresponding paddles inward.

8. A high-frequency yarn feeding method, based on the high-frequency yarn feeding mechanism according to any one of claims 1-7, characterized in that, include: S1, the rotating sleeve rotates around the central axis, causing multiple paddles disposed on the side wall of the rotating sleeve to rotate synchronously with it; Under the centrifugal force generated by rotation, each of the paddles remains in a reset state, flipped outward and protruding from the outer wall of the rotating sleeve; S2, The control system determines whether the yarn needs to be switched based on the current yarn selection command; If switching is required, the needle selector on the needle selector that corresponds to the movement trajectory of the lever will perform a selection action; if switching is not required, the needle selector will remain stationary. S3, If the selection pin performs the selection action, the selection pin pushes the passing paddle inward to overcome the centrifugal force and pushes the paddle from the reset state into an action state in which it flips inward and protrudes towards the inside of the rotating sleeve. If the needle selection pin is not selected, the lever remains in the reset state and passes directly past the needle selector; S4, the paddle in the aforementioned action state continues to rotate with the rotating sleeve. When it moves to contact the corresponding yarn selecting piece in the yarn selecting assembly, the paddle pushes against the yarn selecting piece, driving the yarn selecting piece to swing around the central axis. Through the swing, the yarn guide hole on the yarn selecting piece is switched from its current position to a yarn feeding position or a non-yarn feeding position. During this process, other yarn selecting pieces that are not pushed remain in their original positions. S5, after the pushing of the yarn selection plate is completed, the paddle disengages from the contact with the yarn selection plate; subsequently, under the action of the centrifugal force generated by the continued rotation of the rotating sleeve, the paddle automatically flips from the action state to the reset state, waiting for the next yarn selection cycle.

9. A circular knitting machine, characterized in that: Includes a high-frequency yarn feeding mechanism as described in any one of claims 1-7.

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