CN-122013428-A - High-frequency yarn-adjusting yarn-feeding mechanism and method and circular knitting machine

CN122013428ACN 122013428 ACN122013428 ACN 122013428ACN-122013428-A

Abstract

The application relates to the technical field of knitting equipment, in particular to a high-frequency yarn-adjusting yarn-feeding mechanism and method and a circular knitting machine. The high-frequency yarn-adjusting yarn-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 swingable yarn selecting sheets, and yarn guiding holes on the yarn selecting sheets can be switched between yarn feeding and non-yarn feeding positions. The centrifugal poking assembly comprises a poking piece in the rotary sleeve and a guide groove, and the poking piece automatically maintains an outwards turned reset state by utilizing the rotary centrifugal force. The needle selecting control component is provided with a fixed needle selecting device and a needle selecting pin. When the yarn selecting device works, if the stitch selecting device performs the selecting action, the passing poking piece is pushed into an inward turning action state, the poking piece rotates along with the rotating sleeve and pushes the corresponding yarn selecting piece to drive the yarn selecting piece to swing to finish yarn changing, and then the poking piece automatically resets under the action of centrifugal force. The application overcomes the mechanical response hysteresis during high-frequency line changing, realizes high-speed accurate switching in an extremely short period, and meets the high-quality production requirement of multicolor complex patterns.

Inventors

WANG LAICHENG
LI RIDONG
HUANG LINHUO
DONG YANGYANG
WANG JIECONG

Assignees

福建泉州凹凸纺织科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (9)

1. A high frequency thread regulating yarn feeding mechanism, comprising: The yarn selecting assembly comprises a plurality of yarn selecting pieces which are arranged around the same central axis in a swinging way, yarn guiding holes for corresponding yarns to pass through are respectively formed in each yarn selecting piece, and the yarn selecting pieces are configured to swing around the central axis to drive the yarn guiding holes to switch between a yarn feeding position and a non-yarn feeding position; The centrifugal poking assembly comprises a rotating sleeve sleeved on the periphery of the yarn selecting assembly and a plurality of poking sheets movably arranged on the side wall of the rotating sleeve, wherein guide grooves penetrating through the inner wall and the outer wall of the rotating sleeve are respectively formed in the side wall of the rotating sleeve corresponding to the poking sheets, and the poking sheets are rotationally connected in the corresponding guide grooves; the rotating sleeve is in transmission connection with the electric spindle; the needle selection control assembly comprises a needle selector which is fixedly arranged, and a needle selection pin corresponding to each shifting piece movement track is arranged on the needle selector; When the rotating sleeve drives any shifting piece in a reset state to pass through the needle selector, if the needle selecting pin executes a selecting action, the shifting piece is pushed into the action state, the shifting piece in the action state pushes the yarn selecting piece corresponding to the yarn selecting piece in the yarn selecting assembly to swing so as to switch the position of the corresponding yarn guiding hole in the process of rotating along with the rotating sleeve, and then the shifting piece is separated from the pushing of the yarn selecting piece and automatically returns to the reset state under the action of centrifugal force.
2. The high-frequency thread regulating yarn feeding mechanism of claim 1, wherein the needle selecting control assembly comprises a first needle selector and a second needle selector which are respectively and fixedly arranged at two axial sides of the rotating sleeve, a plurality of needle selecting pins are respectively arranged on the first needle selector and the second needle selector, the needle selecting pins correspond to a movement track of a plectrum, when the plectrum moves through the first needle selector, if the needle selecting pin of the first needle selector corresponding to the movement track of the plectrum is selected, the plectrum drives the corresponding yarn selecting plate to swing to a yarn feeding position, and when the plectrum moves through the second needle selector, if the needle selecting pin of the second needle selector corresponding to the movement track of the plectrum is selected, the plectrum drives the corresponding yarn selecting plate to swing to a non-yarn feeding position.
3. The high-frequency thread regulating yarn feeding mechanism as set forth in claim 1, wherein said pulling plate is provided with a limiting slot, a limiting shaft is fixedly arranged in said guiding slot, said limiting shaft is inserted into said limiting slot, said limiting shaft and said limiting slot are cooperatively structured to limit the swing angle of said pulling plate to define the limit positions of said reset state and said action state.
4. The high-frequency thread-adjusting yarn feeding mechanism as claimed in claim 1, wherein the yarn selecting assembly further comprises a damping positioning structure, wherein the damping positioning structure is configured to provide damping force for the yarn selecting piece, the damping force is set to be enough to keep the position of the yarn selecting piece stable when the poking piece does not push the yarn selecting piece, and is smaller than the acting force required by the poking piece to drive the yarn selecting piece to swing when the poking piece pushes the yarn selecting piece.
5. The high-frequency yarn-adjusting yarn feeding mechanism according to claim 1, further comprising a magnetic coupler, wherein the electric spindle is used for outputting power, the rotating sleeve is in transmission connection with the electric spindle through the magnetic coupler, the magnetic coupler comprises a driving magnetic rotor and a driven magnetic rotor which are respectively arranged at the output end of the electric spindle and the input end of the rotating sleeve, no physical contact exists between the driving magnetic rotor and the driven magnetic rotor, and torque is transmitted through magnetic field coupling.
6. The high-frequency yarn-adjusting yarn-feeding mechanism of claim 1, wherein the yarn-guiding holes on each yarn-selecting piece are distributed in a staggered manner along the height direction so as to avoid yarn intertwining during the swinging process of the yarn-selecting piece.
7. The high-frequency thread-adjusting yarn feeding mechanism according to claim 2, wherein the yarn selecting assembly comprises a first yarn selecting piece and a second yarn selecting piece, the shifting pieces on the rotary sleeve are sequentially arranged at three axial positions along the axial direction of the yarn selecting assembly, the shifting pieces are symmetrically distributed at two axial positions along the circumferential direction, six shifting pieces are arranged on the rotary sleeve in total, three selecting pins corresponding to the three axial positions are respectively arranged on the first needle selector and the second needle selector, and the corresponding shifting pieces are selectively pushed inwards.
8. A high frequency thread feeding method based on the high frequency thread feeding mechanism of any one of claims 1-7, comprising: S1, rotating a rotary sleeve around a central axis to enable a plurality of poking sheets arranged on the side wall of the rotary sleeve to synchronously rotate along with the rotary sleeve, wherein under the action of centrifugal force generated by rotation, each poking sheet keeps a reset state of outwards overturning and protruding out of the outer side wall of the rotary sleeve; S2, the control system judges whether yarn switching is needed according to the current yarn selecting instruction; If the switching is needed, the needle selecting device is controlled to execute the selecting action corresponding to the shifting piece movement track; S3, if the selecting pin performs the selecting action, the selecting pin inwards pushes the passing poking piece to overcome the centrifugal force to push the poking piece from the reset state into the action state of inwards overturning and protruding towards the inside of the rotary sleeve; If the needle selecting pin does not execute the selecting action, the poking piece keeps the reset state and directly passes through the needle selecting device; S4, continuously rotating the poking plate in the action state along with the rotating sleeve, and pushing the yarn selecting plate by the poking plate to drive the yarn selecting plate to swing around the central axis when the poking plate moves to be in contact with the corresponding yarn selecting plate in the yarn selecting assembly; And S5, after the yarn selecting piece is pushed, the poking piece is separated from contact with the yarn selecting piece, and then the poking piece automatically overturns from the action state to return to the reset state under the action of centrifugal force generated by continuous rotation of the rotating sleeve, and waits for the next yarn selecting cycle.
9. A circular knitting machine characterized by comprising the high-frequency thread-regulating yarn-feeding mechanism as claimed in any one of claims 1 to 7.

Description

High-frequency yarn-adjusting yarn-feeding mechanism and method and circular knitting machine Technical Field The invention relates to the technical field of knitting equipment, in particular to a high-frequency yarn-adjusting yarn-feeding mechanism and method and a circular knitting machine. Background When a circular knitting machine is used for knitting multi-color fabrics, the yarn-adjusting yarn-feeding mechanism is relied on to realize the switching of different yarns, the traditional yarn-feeding mechanism is used for parallelly arranging a plurality of yarn-feeding finger bodies on the same rotating shaft, and the fingers are controlled to swing up and down around the shaft through the independent driving device at the rear end, so that the front yarn nozzle moves to the yarn-feeding position to guide the specific yarns to participate in knitting. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a high-frequency yarn-adjusting yarn feeding mechanism and method capable of adapting to high-speed accurate switching in an extremely short weaving period and a circular knitting machine. In order to achieve the purpose, the technical scheme adopted by the invention is as follows, the high-frequency thread-adjusting yarn feeding mechanism comprises: The yarn selecting assembly comprises a plurality of yarn selecting pieces which are arranged around the same central axis in a swinging way, yarn guiding holes for corresponding yarns to pass through are respectively formed in each yarn selecting piece, and the yarn selecting pieces are configured to swing around the central axis to drive the yarn guiding holes to switch between a yarn feeding position and a non-yarn feeding position; The centrifugal poking assembly comprises a rotating sleeve sleeved on the periphery of the yarn selecting assembly and a plurality of poking sheets movably arranged on the side wall of the rotating sleeve, wherein guide grooves penetrating through the inner wall and the outer wall of the rotating sleeve are respectively formed in the side wall of the rotating sleeve corresponding to the poking sheets, and the poking sheets are rotationally connected in the corresponding guide grooves; the rotating sleeve is in transmission connection with the electric spindle; the needle selection control assembly comprises a needle selector which is fixedly arranged, and a needle selection pin corresponding to each shifting piece movement track is arranged on the needle selector; When the rotating sleeve drives any shifting piece in a reset state to pass through the needle selector, if the needle selecting pin executes a selecting action, the shifting piece is pushed into the action state, the shifting piece in the action state pushes the yarn selecting piece corresponding to the yarn selecting piece in the yarn selecting assembly to swing so as to switch the position of the corresponding yarn guiding hole in the process of rotating along with the rotating sleeve, and then the shifting piece is separated from the pushing of the yarn selecting piece and automatically returns to the reset state under the action of centrifugal force. Further, the needle selecting control assembly comprises a first needle selector and a second needle selector which are respectively and fixedly arranged at two axial sides of the rotary sleeve, a plurality of needle selecting feet are respectively arranged on the first needle selector and the second needle selector, the needle selecting feet correspond to a movement track of a poking piece, when the poking piece moves through the first needle selector, if the poking piece is selected by the needle selecting feet of the first needle selector corresponding to the movement track of the poking piece, the poking piece drives the corresponding yarn selecting piece to swing to a yarn feeding position, when the poking piece moves through the second needle selector, if the poking piece is selected by the needle selecting feet of the second needle selector corresponding to the movement track of the poking piece, the poking piece drives the corresponding yarn selecting piece to swing to a non-yarn feeding position. Furthermore, a limiting long hole is formed in the poking piece, a limiting shaft is fixedly arranged in the guide groove, the limiting shaft penetrates through the limiting long hole, and the limiting shaft and the limiting long hole are matched to limit the swing angle of the poking piece so as to define the limit positions of the reset state and the action state. Further, the yarn selecting assembly further comprises a damping positioning structure, wherein the damping positioning structure is configured to provide damping force for the yarn selecting piece, the damping force is set to be enough to keep the position of the yarn selecting piece stable when the poking piece does not push the yarn selecting piece, and is smaller than the acting force required by the pok