Yarn turning mechanism, yarn turning method and reeling machine

Abstract

The invention belongs to the technical field of reeling machines, and discloses a yarn turning mechanism, a yarn turning method and a reeling machine. The yarn turning mechanism comprises a rack, a yarn turning assembly, a driving piece and a transmission assembly. According to the yarn turning mechanism, power is provided through the single driving piece, the two yarn turning pieces in the same set are synchronously driven through the transmission assembly, the power transmission path is unified, the time and angle deviation of the action of the yarn turning pieces can be thoroughly eliminated, and therefore the situation that yarn stacking or incomplete strand splitting occurs in a skein strand splitting area is avoided, and the yarn turning efficiency is improved. Therefore, the overall operation efficiency of the hank reeling machine is improved. According to the hank reeling machine, the yarn turning mechanism is arranged between the yarn forming mechanism and the threading and knotting mechanism, the problems that when heavy hank yarn is processed, insertion is not thorough, yarn splitting is not thorough, and the yarn is prone to breakage and sliding off can be solved, accurate yarn turning and splitting are achieved, the threading and knotting action can be smoothly completed for the threading and knotting mechanism, and the working efficiency is improved. And yarn shaping is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of a hank winding machine, and particularly relates to a yarn turning mechanism, a yarn turning method and a hank winding machine. BACKGROUND

[0002] Hank winding is a key link between dyeing and subsequent processing in yarn production, and is generally completed by a hank winding machine to form a hank, separate hanks and thread setting. The hank winding machine separates hanks by a yarn turning mechanism, which provides a basis for subsequent threading and directly affects the continuity of hank winding and the quality of yarn processing.

[0003] A conventional yarn turning mechanism is generally equipped with two cylinders, and the piston rod of each cylinder is fixedly connected with a spur gear. The spur gears are respectively engaged with two connecting shafts, and the two connecting shafts are parallel and each fixedly connected with a yarn turning piece at the end. When the yarn is wound to form a hank, the first cylinder is started to drive the corresponding spur gear to rotate, the spur gear drives the connecting shaft to rotate, the first yarn turning piece is turned into the hank to complete the hank separation, and then the second cylinder is started to repeat the same driving process to drive the second yarn turning piece to turn into the hank to complete the hank separation.

[0004] However, the actions of the two yarn turning pieces are realized by starting the two cylinders respectively, and are affected by factors such as cylinder pressure fluctuation and gear meshing gap difference. The time and angle of the two yarn turning pieces turning into the hank are prone to deviation, which causes the hank separation area to have yarn stacking or incomplete separation, and further causes the subsequent threading process to be blocked, thereby reducing the overall operation efficiency of the hank winding machine.

[0005] Therefore, the above problems need to be solved. SUMMARY

[0006] The present application aims to provide a yarn turning mechanism, a yarn turning method and a hank winding machine to avoid the problems of yarn stacking or incomplete separation in the hank separation area, thereby improving the overall operation efficiency of the hank winding machine.

[0007] To achieve this purpose, the present application adopts the following technical solutions:

[0008] A yarn turning mechanism, comprising a rack, a yarn turning assembly, a driving member and a transmission assembly, wherein:

[0009] The yarn turning assembly is at least provided in one group, and the yarn turning assembly is configured to perform a yarn turning action on a hank formed by winding;

[0010] Each group of the yarn turning assembly comprises two yarn turning pieces, the two yarn turning pieces are arranged on the rack around a preset axis, and the two yarn turning pieces can cooperate with each other to realize the yarn turning action;

[0011] The driving member is arranged on the frame and configured to provide a driving force;

[0012] Each of the two turning-in pieces in each group of the turning-in assembly is connected with the driving member through the transmission assembly, so that the two turning-in pieces in the same group of the turning-in assembly are synchronously driven to rotate reversely by the driving force output by the driving member.

[0013] As preferred, each group of the turning-in assembly further comprises two inserting-in pieces, and each of the two inserting-in pieces corresponds to one of the two turning-in pieces;

[0014] The length of each of the inserting-in pieces is greater than that of the corresponding turning-in piece, and the extending direction of each of the inserting-in pieces is consistent with the initial extending direction of the corresponding turning-in piece.

[0015] As preferred, the turning-in mechanism further comprises a power member configured to drive the turning-in assembly to approach or move away from the hank, so that each of the inserting-in pieces is inserted into the hank prior to the corresponding turning-in piece before the turning-in action starts.

[0016] As preferred, the end of each of the turning-in pieces for insertion into the hank is in a square structure.

[0017] As preferred, the end of each of the inserting-in pieces for insertion into the hank is provided with a pointed structure, and the pointed structures of the two inserting-in pieces in the same group of the turning-in assembly are close to each other.

[0018] As preferred, the driving member comprises two telescopic cylinders arranged on the frame, and the piston rods of the two telescopic cylinders are connected with the transmission assembly, and the piston rods of the two telescopic cylinders are alternatively telescoped to output the driving force.

[0019] As preferred, the transmission assembly comprises a rack, a first gear, a second gear and a third gear, wherein:

[0020] The rack is arranged along a direction perpendicular to the preset axis and is in transmission connection with the driving member;

[0021] The first gear is in mesh with the rack, the second gear is in mesh with the first gear, the third gear is in mesh with the second gear, and the second gear and the third gear are respectively in one-to-one connection with the two turning-in pieces in the same group of the turning-in assembly.

[0022] A turning-in method applied to the above turning-in mechanism, characterized by comprising the following steps:

[0023] The turning-in assembly is in a standby turning-in position, and the two turning-in pieces in each group of the turning-in assembly keep an initial posture around the preset axis;

[0024] The driving force output by the driving member is transmitted to the two yarn turning pieces through the transmission assembly to drive the two yarn turning pieces to rotate reversely synchronously around the preset axis to complete the first yarn turning;

[0025] The driving member outputs reverse driving force to drive the two yarn turning pieces to rotate reversely synchronously through the transmission assembly to complete the second reverse yarn turning.

[0026] The two yarn turning pieces of each group of yarn turning assemblies return to the initial posture to complete a complete yarn turning cycle.

[0027] As preferred, after the yarn turning assembly is in the position ready for yarn turning and before the driving member outputs the driving force, the yarn turning method further comprises the following steps:

[0028] The power member drives the yarn turning assembly to move towards the hank direction to drive the two yarn inserting pieces in each group of yarn turning assemblies to first insert into the hank, and then the corresponding yarn turning pieces enter the hank along the insertion path of the yarn inserting pieces.

[0029] A hank winding machine comprises a yarn forming mechanism, a threading and knotting mechanism, and the above-described yarn turning mechanism, wherein:

[0030] The yarn forming mechanism is configured to form a hank by winding yarn and can deliver the hank to the working area of the yarn turning mechanism;

[0031] The yarn turning mechanism is arranged between the yarn forming mechanism and the threading and knotting mechanism, and the yarn turning assembly is configured to turn and separate the hank;

[0032] The threading and knotting mechanism is configured to receive the hank separated by the yarn turning mechanism and to shape the hank.

[0033] The present application has the following advantages:

[0034] The yarn turning mechanism provided by the present application provides power through a single driving member, and then synchronously drives the two yarn turning pieces of the same group through a transmission assembly. The power transmission path is unified, which can completely eliminate the time and angle deviation of the yarn turning piece action, thereby avoiding the situation that the hank separation area has yarn stacking or incomplete separation, and further improving the overall operation efficiency of the hank winding machine.

[0035] The hank winding machine provided by the present application arranges the above-described yarn turning mechanism between the yarn forming mechanism and the threading and knotting mechanism, which can avoid the problems of insertion failure, incomplete separation, and easy yarn breakage and sliding when processing heavy hanks, and realizes accurate yarn turning and separation, thereby providing protection for the threading and knotting mechanism to smoothly complete the threading and knotting action and shape the yarn. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1is a structural schematic view of the yarn turning mechanism provided by the present application;

[0037] Fig. 2 is a partial structural schematic view of the yarn turning mechanism provided by the present application;

[0038] Fig. 3 is a structural schematic view of the yarn turning assembly provided by the present application;

[0039] Fig. 4 is a schematic view of the yarn turning of two yarn turning pieces in the same group of yarn turning assemblies provided by the present application.

[0040] in the figure:

[0041] 100, skein;

[0042] 1, frame;

[0043] 2, yarn turning assembly; 21, yarn turning piece; 22, yarn inserting piece; 23, connecting shaft;

[0044] 3, driving member; 31, telescopic cylinder;

[0045] 4, transmission assembly; 41, rack; 42, first gear; 43, second gear; 44, third gear. DETAILED DESCRIPTION

[0046] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described drawings.

[0047] In this application, the terms "comprise", "contain", "have" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or device that includes a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of another identical element in the process, method, article or device that includes the element.

[0048] In this application, the term "and / or", is a description of the association relationship between the associated objects, which means that there can be three kinds of relationships. For example, a centrifugal vortex magnetic force pump and / or a centrifugal vortex magnetic force pump can mean that there is only one centrifugal vortex magnetic force pump, there is a centrifugal vortex magnetic force pump and a centrifugal vortex magnetic force pump, and there is only a centrifugal vortex magnetic force pump. In addition, the character " / " in the present application generally indicates that the front and rear associated objects are in a "and / or" relationship.

[0049] In this application, the terms "connect," "couple," "coupled," "mount," and "mounting" can be direct or indirect, and can include mechanical, electrical, and / or logical connections, among others.

[0050] In this application, those of ordinary skill in the art will appreciate that the use of relative terms (e.g., "about," "approximately," "substantially," etc.) in connection with a quantity or condition will be understood to include the stated value and possess the meaning indicated by the context. For example, the relative terms will at least include the degree of error associated with measurement of the particular quantity based upon the equipment used and the manner in which the measurement is made. Such terms should also be considered as disclosing a range that is the absolute value of the two endpoints. The relative terms can refer to a percentage (e.g., 1%, 5%, 10% or more) of the indicated value plus or minus. Values that are not preceded by relative terms should also be disclosed as being of a particular value with a tolerance. In addition, "substantially" when used in expressing a relative angular positional relationship (e.g., substantially parallel, substantially perpendicular) can refer to plus or minus a certain number of degrees (e.g., 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0051] In this application, those of ordinary skill in the art will appreciate that a function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, a function performed by a part can be performed by one part, one component, or multiple parts in combination.

[0052] In this application, the terms "upper," "lower," "left," "right," "front," "back," and the like describe the orientation and position as shown in the drawings and are not limiting on the embodiments of the application. In addition, it will be understood that when a component is referred to as being "on" or "under" another component, it can be directly on or under the other component, or it can be indirectly on or under the other component by way of one or more intermediate components. It will also be understood that the terms "upper," "lower," "left," "right," "front," "back," and the like refer to the orientation and position of the components as shown in the drawings, and can be used interchangeably with "superior," "inferior," "lateral," "medial," "anterior," "posterior," and the like.

[0053] See Figs. 1 to 4The embodiment provides a yarn turning mechanism, which comprises a rack 1, yarn turning assemblies 2, a driving member 3 and a transmission assembly 4. The yarn turning assemblies 2 are arranged in at least one group, and the yarn turning assemblies 2 are configured to perform a yarn turning action on the hank 100 formed by plying. Each group of the yarn turning assemblies 2 comprises two yarn turning pieces 21, the two yarn turning pieces 21 are arranged on the rack 1 around a preset axis, and the two yarn turning pieces 21 can cooperate with each other to realize the yarn turning action. The driving member 3 is arranged on the rack 1 and is configured to provide a driving force. The two yarn turning pieces 21 in each group of the yarn turning assemblies 2 are in transmission connection with the driving member 3 through the transmission assembly 4, so that the two yarn turning pieces 21 in the same group of the yarn turning assemblies 2 are synchronously driven to rotate reversely by the driving force output by the driving member 3.

[0054] It can be understood that the power is provided by the single driving member 3, and then the two yarn turning pieces 21 in the same group are synchronously driven by the transmission assembly 4, the power transmission path is unified, the time and angle deviation of the yarn turning piece 21 action can be completely eliminated, the situation that the hank 100 is not completely separated in the hank separation area or the yarn is stacked can be avoided, and then the overall operation efficiency of the plying machine is improved.

[0055] Correspondingly, the embodiment also provides a yarn turning method applied to the yarn turning mechanism, which comprises the following steps.

[0056] The yarn turning assemblies 2 are in a standby yarn turning position, and the two yarn turning pieces 21 in each group of the yarn turning assemblies 2 keep an initial posture around a preset axis;

[0057] The driving force output by the driving member 3 is transmitted to the two yarn turning pieces 21 through the transmission assembly 4, so that the two yarn turning pieces 21 are synchronously driven to rotate reversely around the preset axis, and the first yarn turning is completed;

[0058] The driving member 3 outputs a reverse driving force, the two yarn turning pieces 21 are synchronously driven to rotate reversely to reset through the transmission assembly 4, and the second reverse yarn turning is completed;

[0059] The two yarn turning pieces 21 in each group of the yarn turning assemblies 2 return to the initial posture, and a complete yarn turning cycle is completed.

[0060] It can be understood that the synchronous action of the yarn turning piece 21 is realized by the same driving member 3 and the transmission assembly 4, the action deviation easily caused by the traditional two cylinders driving respectively is eliminated, and then the problems that the hank 100 is not completely separated and the subsequent threading is stuck are avoided, and the continuity and efficiency of the plying operation are ensured.

[0061] When the traditional yarn turning mechanism processes the thick hank 100, because of the yarn equalization requirement, the yarn width limitation and the spacing limitation between the connecting shaft 23 and the hank rod, the length of the yarn turning piece 21 cannot be increased, so that the yarn turning piece 21 cannot completely penetrate the hank 100, part of the yarn is hung on the yarn turning piece 21, and the subsequent yarn turning is not complete or the yarn is broken. The hank rod is a component for supporting the hank 100 in a yarn forming mechanism, and will not be described in detail.

[0062] To solve the above problems, each group of yarn turning assembly 2 further comprises two yarn inserting pieces 22, which correspond to the two yarn turning pieces 21 one by one. The length of the yarn inserting piece 22 is greater than that of the corresponding yarn turning piece 21, and the extension direction of the yarn inserting piece 22 is consistent with the initial extension direction of the corresponding yarn turning piece 21.

[0063] In this way, the yarn is first inserted in advance by the yarn inserting piece to separate the heavy hank 100, laying a foundation for the subsequent action of the yarn turning piece 21. When the yarn turning piece 21 performs the yarn turning action again, because the yarn has been pre-separated by the yarn inserting piece 22, the problem of incomplete yarn turning and yarn breakage is avoided, and the subsequent threading is smooth.

[0064] Correspondingly, after the yarn turning assembly 2 is in the yarn turning position and before the driving member 3 outputs the driving force, the yarn turning method further comprises the following steps:

[0065] The power member drives the yarn turning assembly 2 to move towards the hank 100, driving the two yarn inserting pieces 22 in each group of yarn turning assembly 2 to first insert into the hank 100, and then the corresponding yarn turning piece 21 enters the hank 100 along the insertion path of the yarn inserting piece 22.

[0066] In this way, by accurately controlling the action timing of the power member, the yarn inserting piece 22 is first inserted into the hank 100 to complete the pre-separation, avoiding the yarn turning piece 21 directly facing the heavy hank 100 which is not separated. At the same time, the yarn turning piece 21 enters the yarn along the insertion path of the yarn inserting piece 22, which can reduce the resistance of the yarn entering the yarn by means of the channel opened by the yarn inserting piece 22, avoiding the yarn hanging or breaking, further ensuring the thoroughness of the yarn turning and separation, and laying a more reliable foundation for the subsequent smooth threading.

[0067] In particular, the yarn turning mechanism further comprises a power member (not shown in the figure), which is configured to drive the yarn turning assembly 2 to approach or move away from the hank 100, so that the yarn inserting piece 22 is inserted into the hank 100 before the yarn turning piece 21 before the yarn turning action starts. The power member synchronously drives the yarn turning assembly 2 to approach or move away from the yarn, so as to ensure that the yarn inserting piece 22 contacts and inserts into the heavy hank 100 before the yarn turning piece 21, and completes the pre-separation of the hank 100 in advance. The pre-separation action of the yarn inserting piece 22 under synchronous driving is stable and will not be affected by the lag of local components, which can completely solve the problem of the original yarn turning piece 21 not being able to insert into the hank 100, lay a foundation for the subsequent yarn turning of the yarn turning piece 21, and reduce the risk of yarn breakage.

[0068] In this embodiment, the power member is a linear cylinder arranged on the frame of the hank machine, and the piston rod is fixedly connected with the frame 1. Since the yarn turning mechanism is arranged on the frame 1, the frame 1 can be driven to move by the extension and retraction of the piston rod of the linear cylinder, thereby driving the yarn turning mechanism to approach or move away from the yarn, and realizing the timing control of the yarn inserting piece 22 being inserted into the hank 100 before the yarn turning piece 21.

[0069] Generally, the front end of the conventional yarn turning piece 21 is arc-shaped to reduce the insertion resistance, but the arc structure is easy to cause the yarn to slide off and collide with the threading tube, affecting the subsequent threading. Therefore, in the present embodiment, the end of the yarn turning piece 21 for inserting the skein 100 is square-shaped. The edges of the square-shaped structure form right-angle supports, which can enhance the holding force on the yarn, avoid the yarn from sliding off the end during the turning process, and solve the yarn slippage problem of the original arc-shaped structure. At the same time, since the yarn pre-stranding has been completed by the insertion piece 22 in advance, the insertion resistance of the yarn turning piece 21 is significantly reduced, and it is not necessary to rely on the arc-shaped design to reduce the insertion resistance. The square-shaped structure can ensure the stable posture of the yarn during the turning process without increasing the resistance, provide regular yarn conditions for the subsequent threading process, and avoid the threading jam caused by the sliding yarn.

[0070] In order to reduce the resistance of the insertion piece 22 when inserting the heavy skein 100, the end of the insertion piece 22 for inserting the skein 100 is provided with a pointed structure, and the pointed structures of the two insertion pieces 22 in the same group of yarn turning assemblies 2 are close to each other.

[0071] It can be understood that the pointed structures of the two insertion pieces 22 in the same group of yarn turning assemblies 2 are close to each other, so that they gather from both sides to the middle after being inserted into the skein 100, realize the central pre-stranding of the yarn, ensure that the yarn is evenly divided into three parts, avoid the pre-stranded yarn from deviating or being partially unstranded, improve the penetration efficiency of the insertion piece 22 to the heavy skein 100, ensure the uniformity of the pre-stranded yarn, provide regular yarn basis for the subsequent turning of the yarn turning piece 21, reduce the risk of yarn hanging and breaking, and ensure smooth subsequent threading.

[0072] In the present embodiment, the driving member 3 includes two telescopic cylinders 31 arranged on the rack 1, the piston rods of the two telescopic cylinders 31 are connected with the transmission assembly 4, and the piston rods of the two telescopic cylinders 31 are alternately telescoped to output driving force.

[0073] The two telescopic cylinders 31 cooperate to realize the action of turning in and turning out. If a single cylinder is used, it can only be turned once and then reset. However, the two telescopic cylinders 31 can realize the action of first turning in, then resetting, and then turning out. This cooperation mode can ensure the continuity of the action of the transmission assembly 4, avoid the action pause of the single cylinder during telescoping, and improve the operation efficiency of the yarn turning mechanism.

[0074] Preferably, the transmission assembly 4 includes a rack 41, a first gear 42, a second gear 43, and a third gear 44. The rack 41 is arranged in a direction perpendicular to the preset axis and is in transmission connection with the driving member 3. The first gear 42 is in meshing connection with the rack 41, the second gear 43 is in meshing connection with the first gear 42, the third gear 44 is in meshing connection with the second gear 43, and the second gear 43 and the third gear 44 are respectively in one-to-one corresponding connection with the two yarn turning pieces 21 in the same group of yarn turning assemblies 2.

[0075] Specifically, two connecting shafts 23 are arranged in the same group of yarn turning assembly 2, and two yarn turning pieces 21 are respectively installed on one connecting shaft 23. The corresponding connection relationship between the second gear 43 and the third gear 44 is realized through the connecting shaft 23. Specifically, the two connecting shafts 23 are provided with teeth, the second gear 43 is engaged with the teeth on one of the connecting shafts 23, and the third gear 44 is engaged with the teeth on the other connecting shaft 23. In this way, the second gear 43 and the third gear 44 can drive the corresponding yarn turning piece 21 to move synchronously through the connecting shaft 23. It should be pointed out that the preset axis mentioned in the foregoing is the axis of the connecting shaft 23.

[0076] As can be seen from the above, the rack 41 is arranged in a direction perpendicular to the preset axis and is in transmission connection with the driving member 3, so that the driving force output by the driving member 3 can be stably converted into the rotary motion of the first gear 42, realizing accurate conversion of the power direction and adapting to the action requirement of the yarn turning piece 21 rotating around the preset axis.

[0077] In addition, the first gear 42 is engaged with the rack 41, the second gear 43 is engaged with the first gear 42, and the third gear 44 is engaged with the second gear 43. Since the gears engaged with each other have opposite directions, the first gear 42 will drive the second gear 43 to rotate in the opposite direction when rotating, and the second gear 43 will drive the third gear 44 to rotate in the opposite direction, so that the second gear 43 and the third gear 44 can respectively drive the two yarn turning pieces 21 in the same group of yarn turning assembly 2 to move synchronously in the opposite direction, which meets the action requirement of dividing the hank 100 when turning the yarn, and can ensure that the hank 100 is evenly divided into three parts, avoiding the situation that the yarn is not divided into three parts or partially divided.

[0078] At the same time, the multi-stage engagement structure of the first gear 42, the second gear 43 and the third gear 44 can accurately control the transmission ratio, and can flexibly adjust the torque output according to the thickness of the yarn. When processing heavy hank 100, sufficient power can also be provided to avoid the problem of insufficient power or action lagging that may occur in single-stage transmission, and the stability of the action of the yarn turning piece 21 is improved. Moreover, the clearance of the rigid gear transmission is small and the response is fast, which can accurately control the rotation angle of the second gear 43 and the third gear 44, thereby ensuring that the rotation angles of the two yarn turning pieces 21 are consistent, reducing the processing deviation of the hank 100 caused by transmission error, and further ensuring the quality of yarn turning, laying a good foundation for the subsequent threading process.

[0079] In combination with the present embodiment, the two telescopic cylinders 31 are rigidly connected as a whole to form a cylinder assembly that can slide along the rack 1. The piston rod end of one telescopic cylinder 31 is hinged to the rack 41, and the piston rod end of the other telescopic cylinder 31 is fixedly connected to the rack 1.

[0080] When the rack 41 needs to be driven to move to one side, the piston rod fixedly connected with the frame 1 extends, and because it is fixed with the frame 1, the piston rod pushes the cylinder assembly to move to one side, and the other piston rod synchronously extends, and both of them cooperatively push the rack 41 to move to one side. When the rack 41 needs to be driven to move to the other side, the piston rod fixedly connected with the frame 1 retracts to pull the cylinder assembly to move to the other side, and the other piston rod synchronously retracts to cooperatively pull the rack 41 to move to the other side. Thus, through the alternate extension and retraction (the extension / retraction state is reversely corresponding) of the two telescopic cylinders 31, the bidirectional linear motion of the rack 41 without stop is realized, the continuous power is provided for the transmission assembly 4, and the stability and high efficiency of the yarn reversing action are ensured.

[0081] The embodiment further provides a hank winding machine, which comprises a yarn forming mechanism, a threading and knotting mechanism and the above-described yarn reversing mechanism. The yarn forming mechanism is configured to form a hank 100 by winding and twisting a yarn, and can deliver the hank 100 to a working area of the yarn reversing mechanism. The yarn reversing mechanism is arranged between the yarn forming mechanism and the threading and knotting mechanism, and the yarn reversing assembly 2 is configured to reverse and separate the hank 100. The threading and knotting mechanism is configured to receive the hank 100 separated by the yarn reversing mechanism, and to shape the hank 100.

[0082] It can be understood that, by arranging the yarn reversing mechanism between the yarn forming mechanism and the threading and knotting mechanism, the problems of not being able to insert through, not being able to separate completely and the yarn being easy to break and fall when processing a thick hank 100 can be avoided, the yarn can be accurately reversed and separated, and the threading and knotting mechanism can be ensured to successfully complete the threading and knotting action and shape the yarn. It should be noted that the yarn forming mechanism and the threading and knotting mechanism are both prior art, and the embodiment does not improve the specific structure and working principle of the yarn forming mechanism and the threading and knotting mechanism, and thus will not be described in detail.

[0083] Obviously, the above-described embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A yarn reversing mechanism characterized by, The invention relates to a yarn turning device, comprising a rack (1), a yarn turning assembly (2), a driving member (3) and a transmission assembly (4), wherein: The yarn turning assembly (2) is provided in at least one group, and is configured to perform a yarn turning action on the hank (100) formed by the winding; Each group of the yarn turning assembly (2) comprises two yarn turning pieces (21), which are arranged on the rack (1) around a preset axis, and can cooperate with each other to realize the yarn turning action; The driving member (3) is arranged on the rack (1) and is configured to provide a driving force; The two yarn turning pieces (21) in each group of the yarn turning assembly (2) are in transmission connection with the driving member (3) through the transmission assembly (4), so that the two yarn turning pieces (21) in the same group of the yarn turning assembly (2) are synchronously driven to rotate reversely by the driving force output by the driving member (3).

2. A yarn reversing mechanism according to claim 1, wherein Each group of the yarn turning assembly (2) further comprises two yarn inserting pieces (22), which correspond to the two yarn turning pieces (21) one by one; The length of the yarn inserting piece (22) is greater than that of the corresponding yarn turning piece (21), and the extension direction of the yarn inserting piece (22) is consistent with the initial extension direction of the corresponding yarn turning piece (21).

3. A thread reversing mechanism according to claim 2, wherein Further comprising a power member configured to drive the yarn turning assembly (2) to approach or move away from the hank (100), so that the yarn inserting piece (22) is inserted into the hank (100) before the yarn turning piece (21) before the yarn turning action starts.

4. A thread reversing mechanism according to claim 3, wherein The end of the yarn turning piece (21) for inserting into the hank (100) is in a square structure.

5. A thread reversing mechanism according to claim 4, wherein The end of the yarn inserting piece (22) for inserting into the hank (100) is provided with a pointed structure, and the pointed structures of the two yarn inserting pieces (22) in the same group of the yarn turning assembly (2) are close to each other.

6. A yarn turning mechanism according to claim 1, wherein The driving member (3) comprises two telescopic cylinders (31) arranged on the rack (1), the piston rods of the two telescopic cylinders (31) are connected with the transmission assembly (4), and the piston rods of the two telescopic cylinders (31) are alternately telescoped to output the driving force.

7. A yarn turning mechanism according to claim 1, wherein The transmission assembly (4) comprises a rack (41), a first gear (42), a second gear (43) and a third gear (44), wherein: The rack (41) is arranged in a direction perpendicular to the preset axis and is in transmission connection with the driving member (3); The first gear (42) is in meshing connection with the rack (41), the second gear (43) is in meshing connection with the first gear (42), the third gear (44) is in meshing connection with the second gear (43), and the second gear (43) and the third gear (44) are respectively in one-to-one connection with the two yarn turning pieces (21) in the same group of the yarn turning assembly (2).

8. A yarn turning method applied to the yarn turning mechanism according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: The yarn turning assembly (2) is in a yarn turning position, and the two yarn turning pieces (21) of each group of the yarn turning assembly (2) keep an initial posture around the preset axis; The driving force output by the driving member (3) is transmitted to the two turning-over pieces (21) through the transmission assembly (4) to drive the two turning-over pieces (21) to rotate reversely synchronously around the preset axis, thereby completing the first turning-over; The driving member (3) outputs reverse driving force to drive the two turning-over pieces (21) to rotate reversely synchronously through the transmission assembly (4), thereby completing the second reverse turning-over; The two turning-over pieces (21) of each turning-over assembly (2) return to the initial posture, thereby completing a complete turning-over cycle.

9. A method of turning a thread according to claim 8, wherein, Each turning-over assembly (2) further comprises two inserting-over pieces (22), and the two inserting-over pieces (22) correspond to the two turning-over pieces (21) one by one. The length of the inserting-over piece (22) is greater than that of the corresponding turning-over piece (21), and the extending direction of the inserting-over piece (22) is consistent with the initial extending direction of the corresponding turning-over piece (21). Before the driving member (3) outputs driving force after the turning-over assembly (2) is in the position for turning-over, the turning-over method further comprises the following steps: The power member drives the turning-over assembly (2) to move towards the direction of the hank (100), thereby driving the two inserting-over pieces (22) in each turning-over assembly (2) to be inserted into the hank (100) first, and then the corresponding turning-over piece (21) enters the hank (100) along the insertion path of the inserting-over piece (22).

10. A rolling machine characterized by The yarn forming mechanism, the threading and knotting mechanism, and the turning-over mechanism as claimed in any one of claims 1-7, wherein: The yarn forming mechanism is configured to form a hank (100) by winding the yarn around a spindle, and can deliver the hank (100) to the working area of the turning-over mechanism; The turning-over mechanism is arranged between the yarn forming mechanism and the threading and knotting mechanism, and the turning-over assembly (2) is configured to turn over and separate the hank (100); The threading and knotting mechanism is configured to receive the hank (100) separated by the turning-over mechanism, and to shape the hank (100).

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