Winding needle mechanism and winding apparatus

Abstract

The present disclosure relates to a winding needle mechanism and a winding apparatus. The winding needle mechanism comprises a controllably rotatable winding needle; the winding needle has an outer peripheral surface and an avoidance part located on the outer peripheral surface, the avoidance part being used for an upstream cut end of a material strip to enter; the winding needle further has a first side wall and a second side wall, the first side wall being provided with an air blowing part which is used for blowing air to the second side wall. In this way, when a cutter cuts off a passerby material strip, under the action of an air flow blown by an air blowing member, the upstream cut end of the material strip is blown into the avoidance part of the winding needle located at a first position. At this time, the upstream cut end of the material strip entering the avoidance part is tightly attached to the second side wall under the action of the air flow blown by the air blowing part on the first side wall. On one hand, when the material strip is continuously conveyed downstream and the winding needle remains rotating, the material strip is cut off and fixed to the winding needle, thereby greatly improving production efficiency. On the other hand, needle threading and strip combining actions are eliminated, thereby greatly simplifying the structure of the winding apparatus.

Description

A winding needle mechanism and a winding device

[0001] The present disclosure claims priority to the Chinese patent application No. 202411066374.3, filed on August 5, 2024, and entitled "A winding needle mechanism and a winding device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of battery manufacturing equipment, in particular to a winding needle mechanism and a winding device. BACKGROUND

[0003] The electrode core is an important component of the battery, which can be made by winding each layer of the material belt (such as four layers of material belt of the separator, the anode pole piece, the separator and the cathode pole piece) by the winding needle.

[0004] In the prior art, after the material belts of each layer are converged by the film converging mechanism, they enter the winding needle located at the first station for winding. After the winding needle located at the first station completes winding of one electrode core, it switches to the second station, and another winding needle switches to the first station. At this time, the material belts of each layer pass through the first station after being converged by the film converging mechanism, and the winding needle located at the first station extends from the turret to complete the threading (i.e., the material belt is threaded into the slit of the winding needle). Then, the inner clamping needle in the winding needle clamps the material belt, and then the cutting knife located between the first station and the second station cuts the material belt. Then, the winding needle located at the first station starts to wind the next electrode core. In summary, the action process of the winding operation in the prior art is complex, which leads to a complex structure of the winding device and low production efficiency. SUMMARY

[0005] Therefore, it is necessary to provide a winding needle mechanism and a winding device to improve the above-mentioned defects, in view of the problem that the action process of the winding operation in the prior art is complex, which leads to a complex structure of the winding device and low production efficiency.

[0006] A winding needle mechanism, comprising a winding needle capable of being controlled to rotate, the winding needle having an outer circumferential surface for winding a material belt and an empty space located on the outer circumferential surface, the empty space being used for an upstream cut end of the material belt to enter after the material belt is cut, the winding needle further having a first side wall and a second side wall as opposite two side walls of the empty space, a gas blowing part being provided on the first side wall, the gas blowing part being used for blowing gas to the second side wall to blow and press the upstream cut end of the material belt entering the empty space to the second side wall.

[0007] In one of the embodiments, the needle roller is provided with a blowing channel in the needle roller, the blowing channel is used for communicating with an external air source, the hollow part is provided with a first cover plate, the first cover plate is used as the first side wall towards one side surface of the second side wall, and a plurality of blowing holes as the blowing part are formed in the first cover plate, each of the blowing holes is communicated with the blowing channel.

[0008] In one of the embodiments, the second side wall is provided with a suction part for suction, the suction part is used for adsorbing the upstream cut end of the material belt on the second side wall by using the negative pressure generated by suction.

[0009] In one of the embodiments, the needle roller is provided with a suction channel in the needle roller, the suction channel is used for communicating with an external negative pressure source, the hollow part is provided with a second cover plate, the second cover plate is used as the second side wall towards one side surface of the first side wall, and a plurality of suction holes as the suction part are formed in the second cover plate, each of the suction holes is communicated with the suction channel.

[0010] In one of the embodiments, the needle roller is provided with a blowing channel communicated with the blowing part and a suction channel communicated with the suction part in the needle roller.

[0011] The needle roller mechanism further comprises a connecting shaft and an air slip ring, the needle roller is mounted on the connecting shaft so that the connecting shaft can drive the needle roller to rotate, the air slip ring is mounted on the connecting shaft, the blowing channel is communicated with the external air source through the air slip ring, and the suction channel is communicated with the external negative pressure source through the air slip ring.

[0012] In one of the embodiments, the hollow part comprises at least two, each of the hollow parts is arranged at intervals along the circumference of the needle roller.

[0013] In one of the embodiments, the needle roller comprises a first outer needle and a second outer needle arranged opposite to each other, the first outer needle and the second outer needle form the hollow part, the outer side walls of the first outer needle and the second outer needle which are away from each other jointly form the outer circumferential surface, one of the inner side walls of the first outer needle and the second outer needle which are towards each other is the first side wall, and the other is the second side wall.

[0014] In one of the embodiments, the needle roller further comprises a needle roller seat, a first fixed needle and a second fixed needle, one end of each of the first fixed needle and the second fixed needle is mounted on the needle roller seat, the first outer needle is arranged on the first fixed needle, and the second outer needle is arranged on the second fixed needle.

[0015] The first outer needle and the second outer needle form a gap between them, and the gap on the same side of the first fixed needle and the second fixed needle is one of the avoidance portions, and the gap on the other side of the first fixed needle and the second fixed needle is another of the avoidance portions.

[0016] In one of the embodiments, the winding needle comprises a first outer needle and a second outer needle arranged opposite to each other, and the outer side walls of the first outer needle and the second outer needle, which are away from each other, jointly form the outer circumferential surface.

[0017] The outer side wall of the first outer needle, which is away from the second outer needle, is provided with a groove as the avoidance portion, and / or the outer side wall of the second outer needle, which is away from the first outer needle, is provided with a groove as the avoidance portion.

[0018] In one of the embodiments, when the winding needle rotates to a position where the avoidance portion cuts off the material belt, the first side wall is located downstream of the second side wall.

[0019] A winding device comprising the winding needle mechanism as described in any one of the above embodiments.

[0020] The winding needle mechanism and the winding device described above, when the cutting knife cuts off the material belt passing through, the upstream cut-off end of the material belt is blown into the avoidance portion of the winding needle located at the first station under the action of the airflow blown by the blowing member. At this time, the upstream cut-off end of the material belt entering the avoidance portion is tightly attached to the second side wall under the action of the airflow blown by the blowing portion on the first side wall, i.e., the upstream cut-off end of the material belt is fixed on the second side wall. On the one hand, the cutting off and fixing of the material belt on the winding needle are completed under the condition that the material belt does not stop conveying downstream and the winding needle keeps rotating, which greatly improves the production efficiency. On the other hand, the actions of threading the needle and film combining are cancelled, which greatly simplifies the structure of the winding device. BRIEF DESCRIPTION OF DRAWINGS

[0021] FIGS. 1 to 3 are structural schematic diagrams of the running process of the winding device in one embodiment of the present disclosure;

[0022] FIG. 4 is a structural schematic diagram of a rolling cutting and feeding assembly of a rolling cutting and feeding mechanism of the winding device shown in FIG. 1;

[0023] FIG. 5 is a structural schematic diagram of the rolling cutting and feeding mechanism and the winding needle mechanism of the winding device shown in FIG. 1;

[0024] FIG. 6 is a structural schematic diagram of the rolling cutting and feeding mechanism shown in FIG. 5;

[0025] FIG. 7 is a structural schematic diagram of the rolling cutting and feeding mechanism shown in FIG. 6 from another perspective;

[0026] FIG. 8 is a structural schematic diagram of the rolling cutting and feeding mechanism and the winding needle mechanism in another embodiment of the present disclosure;

[0027] FIG. 9 is a structural schematic diagram of the roll cutting feeding mechanism shown in FIG. 8;

[0028] FIG. 10 is a structural schematic diagram of the roll cutting feeding mechanism shown in FIG. 9 from another perspective;

[0029] FIG. 11 is a structural schematic diagram of a first roller pressing assembly of the roll cutting feeding mechanism shown in FIG. 9;

[0030] FIG. 12 is a structural schematic diagram of a winding needle mechanism of the winding device shown in FIG. 1;

[0031] FIG. 13 is a structural schematic diagram of the winding needle mechanism and the roll cutting feeding mechanism of the winding device shown in FIG. 1;

[0032] FIG. 14 is a sectional structural diagram of a winding needle of the winding needle mechanism shown in FIG. 13;

[0033] FIG. 15 is a structural schematic diagram of the winding needle mechanism and the roll cutting feeding mechanism in another embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] In order to make the above objectives, features and advantages of the present disclosure more obvious and easy to understand, the specific embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present disclosure, so the present disclosure is not limited by the specific embodiments disclosed below.

[0035] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0036] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0037] In the present disclosure, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and like terms should be construed in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through intermediate medium, can be internal communication of two elements or interaction relationship between two elements, unless specifically defined otherwise. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0038] In the present disclosure, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and like terms should be construed in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through intermediate medium, can be internal communication of two elements or interaction relationship between two elements, unless specifically defined otherwise. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0039] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0040] Please refer to FIG. 1 to FIG. 4 and FIG. 13, an embodiment of the present disclosure provides a winding device, which comprises a winding needle mechanism 10 and a roll cutting feeding mechanism 20. The winding needle mechanism 10 comprises a winding needle 11 located at a first station a1 and controllable to rotate, the winding needle 11 has an outer circumferential surface for winding a material belt A and an empty portion 110 located on the outer circumferential surface. The empty portion 110 is used for the upstream cut end A11 of the material belt A after being cut to enter, and the upstream cut end A11 of the material belt A entering is fixed. The roll cutting feeding mechanism 20 is used for pressing the material belt A to the outer circumferential surface of the winding needle 11 located at the first station a1, and cutting the material belt A passing through at the empty portion 110 on the winding needle 11 in a roll cutting manner, and blowing the upstream cut end A11 of the material belt A into the empty portion 110 of the winding needle 11. The upstream cut end A11 of the material belt A entering the empty portion 110 is fixed in the empty portion 110.

[0041] In the embodiment of the present application, the roll cutting feeding mechanism 20 comprises a roller pressing assembly (not labeled in the figure) and a roll cutting feeding assembly 23. The roller pressing assembly is used to press the passing tape A against the winding needle 11 located at the first station a1. The roll cutting feeding assembly 23 comprises a rotating shaft 231, a cutter 232 and a blowing member 233. The cutter 232 and the blowing member 233 are both arranged on the rotating shaft 231. The rotating shaft 231 can be controlled to rotate around its own axis to drive the cutter 232 and the blowing member 233 to rotate to be opposite to the empty space 110 on the winding needle 11 located at the first station a1. When the rotating shaft 231 drives the cutter 232 and the blowing member 233 to rotate to be opposite to the empty space 110 on the winding needle 11 located at the first station a1, the cutter 232 cuts the passing tape A, and the blowing member 233 blows air flow to the winding needle 11 located at the first station a1 to blow the upstream cut end A11 of the tape A into the empty space 110 on the winding needle 11, and the upstream cut end A11 of the tape A entering the empty space 110 is fixed in the empty space 110.

[0042] In actual use, the winding device described above, the tape A is transported downstream at a certain speed and passes through the first station a1. The winding needle 11 reaches the first station a1 and rotates around its own axis. At the same time, the roller pressing assembly presses the tape A against the winding needle 11 located at the first station a1, and the rotating shaft 231 drives the cutter 232 and the blowing member 233 to rotate. When the cutter 232 and the blowing member 233 rotate with the rotating shaft 231 to be opposite to the winding needle 11 located at the first station a1, the winding needle 11 located at the first station a1 also rotates so that the empty space 110 on the winding needle 11 faces the cutter 232 and the blowing member 233. At this time, the cutter 232 contacts the tape A passing through the empty space 110 on the winding needle 11 and cuts it, and the blowing member 233 blows air towards the empty space 110 on the winding needle 11 to blow the upstream cut end A11 of the tape A formed after being cut into the empty space 110 on the winding needle 11. The upstream cut end A11 of the tape A entering the empty space 110 is fixed in the empty space 110. As the winding needle 11 located at the first station a1 continues to rotate, the tape A is wound on the outer circumferential surface of the winding needle 11, that is, the winding of the tape A is realized.

[0043] In this way, under the condition that the tape A does not stop transporting downstream, the tape A is cut (i.e. roll cutting) by rotating the cutter 232 with the rotating shaft 231, and the upstream cut end A11 of the tape A is blown into the empty space 110 on the winding needle 11 by the air flow blown by the blowing member 233, and the upstream cut end A11 of the tape A entering the empty space 110 is fixed in the empty space 110. In this process, the winding needle 11 remains rotating, which greatly improves the production efficiency and cancels the needle threading and film combining actions, greatly simplifying the structure of the winding device.

[0044] It can be understood that after the cutting knife 232 cuts the material belt A, the material belt A is cut into an upstream cut end A11 located upstream and a downstream cut end located downstream, which is separated from the upstream cut end A11 with the downstream material belt A conveying downstream. Under the pressing action of the roller pressing assembly on the material belt A, the upstream cut end A11 of the material belt A is blown into the empty portion 110 of the roller 11 at the first station a1 by the air flow blown by the air blowing member 233. The upstream cut end A11 of the material belt A in the empty portion 110 is fixed in the empty portion 110, so that the roller 11 at the first station a1 can wind the material belt A.

[0045] Specifically, the rotary cutting and feeding assembly 23 further comprises a heating member 234 arranged on the cutting knife 232. The heating member 234 is used to heat the cutting knife 232, so that the cutting knife 232 can heat-cut the material belt A, and ensure that the cutting knife 232 can accurately and quickly cut the material belt A. Specifically, the cutting knife 232 is internally provided with a mounting hole (not shown in the figure), and the heating member 234 is arranged in the mounting hole, so that the heat generated by the heating member 234 can be quickly transmitted to the blade of the cutting knife 232, so that the temperature of the blade of the cutting knife 232 meets the process requirements. Optionally, the heating member 234 can be a heating rod.

[0046] Further, the rotary cutting and feeding assembly 23 further comprises an electric slip ring 236 mounted on the rotating shaft 231. The heating member 234 is electrically connected to the external power supply through the electric slip ring 236, so as to avoid the connection line between the heating member 234 and the external power supply from being wound when the rotating shaft 231 rotates. It should be noted that the electric slip ring 236 has a stator and a rotor. The rotor rotates synchronously with the rotating shaft 231, and the stator is fixed. The stator has a first electrical connector electrically connected to the external power supply through a line, and the rotor has a second electrical connector electrically connected to the heating member 234 through a line. The first electrical connector and the second electrical connector can maintain electrical connection when the rotor rotates relative to the stator, so that the heating member 234 and the external power supply are electrically connected. It should be noted that the specific structure of the stator and the rotor of the electric slip ring 236 can adopt a relatively mature prior art, which is not limited here.

[0047] Specifically, the air blowing member 233 has a first air knife opening 2331 for blowing air flow. The first air knife opening 2331 can be a strip-shaped air outlet groove extending longitudinally in a direction parallel to the axial direction of the rotating shaft 231, or a plurality of air outlet holes arranged in a direction parallel to the axial direction of the rotating shaft 231. As long as the upstream cut end A11 of the material belt A can be accurately and quickly blown into the empty portion 110 of the roller 11 at the first station a1 when the material belt A is cut, it is not limited here.

[0048] In the embodiments of the present application, the roller pressing assembly includes a first roller pressing assembly 21 and a second roller pressing assembly 22. The first roller pressing assembly 21 has a first pressing roller 211 rotatable about its own axis (see FIG. 13), and the first roller pressing assembly 21 can drive the first pressing roller 211 to press the portion of the material strip A upstream of the cutter 232 against the outer circumferential surface of the winding needle 11 located at the first station a1 in a controllable manner. The second roller pressing assembly 22 has a second pressing roller 221 rotatable about its own axis (see FIG. 13), and the second roller pressing assembly 22 can drive the second pressing roller 221 to press the portion of the material strip A downstream of the cutter 232 against the outer circumferential surface of the winding needle 11 located at the first station a1, so that the material strip A passing through upstream and downstream of the cutter 232 is pressed against the winding needle 11 located at the first station a1 before the cutter 232 rolls and cuts the material strip A, thereby ensuring that the cutter 232 can accurately cut the passing material strip A, which is beneficial to improve the rolling and cutting quality.

[0049] It can be understood that, since the first pressing roller 211 of the first roller pressing assembly 21 and the second pressing roller 221 of the second roller pressing assembly 22 are both rotatable about their own axes, when the first pressing roller 211 and the second pressing roller 221 press the passing material strip A against the outer circumferential surface of the winding needle 11 located at the first station a1, the material strip A can pass through between the first pressing roller 211 and the winding needle 11 located at the first station a1 and between the second pressing roller 221 and the winding needle 11 located at the first station a1 and be conveyed downstream under the downstream traction. That is, during the process in which the shaft 231 drives the cutter 232 to roll and cut, the cutter 232 rotates with the shaft 231, the winding needle 11 located at the first station a1 also rotates, and the material strip A between the cutter 232 and the winding needle 11 is conveyed downstream, and the rotation speed of the shaft 231, the rotation speed of the winding needle 11, and the conveying speed of the material strip A downstream are matched, ensuring that the speed of the cutter 232 is consistent with the speeds of the winding needle 11 and the material strip A at the moment when the cutter 232 cuts the material strip A, so that the cutter 232 can accurately and quickly cut the material strip A, and the air blowing member 233 can also accurately blow the upstream cut end A11 of the material strip A into the avoidance portion 110 of the winding needle 11 located at the first station a1.

[0050] In the embodiments, the roller assembly has a first state (see FIGS. 1 and 2), a second state (see FIG. 3), and a third state. Referring to FIGS. 1 and 2, when the roller assembly is in the first state, the first roller 211 and the second roller 221 simultaneously press the tape A against the outer circumferential surface of the winding needle 11 located at the first station a1. The rotating shaft 231 can be controlled to move close to the winding needle 11 located at the first station a1 to a rolling cutting position (see FIG. 1), so that the cutting knife 232 and the air blowing member 233 on the rotating shaft 231 are close enough to the winding needle 11 located at the first station a1, ensuring that the cutting knife 232 can cut the tape A passing through the avoidance portion 110 of the winding needle 11 when the rotating shaft 231 rotates, and the air blowing member 233 can accurately blow the upstream cut end A11 of the tape A into the avoidance portion 110 of the winding needle 11. The rotating shaft 231 can also be controlled to move away from the winding needle 11 located at the first station a1 to leave the above-mentioned rolling cutting position (see FIG. 2), so that the cutting knife 232 and the air blowing member 233 on the rotating shaft 231 are away from the winding needle 11 located at the first station a1 by a certain distance, thereby avoiding interference of the cutting knife 232 and the air blowing member 233 with the winding action of the winding needle 11 located at the first station a1.

[0051] Referring to FIG. 3, when the roller assembly is in the second state, the first roller 211 is separated from the winding needle 11 located at the first station a1 (i.e., the first roller 211 stops pressing the tape A passing between the first roller 211 and the winding needle 11 located at the first station a1), and the second roller 221 keeps pressing the passing tape A against the outer circumferential surface of the winding needle 11 located at the first station a1. At this time, since the upstream first roller 211 stops pressing the tape A against the winding needle 11 located at the first station a1, it is easier to insert the starting end of the pole piece tape between the tape A and the outer circumferential surface of the winding needle 11 and / or between the layers of the tape A, thereby winding the pole piece tape together with the tape A on the winding needle 11 located at the first station a1. At the same time, the winding needle 11 located at the first station a1 rotates to wind the tape A on its outer circumferential surface, and during this process, since the second roller 221 keeps pressing the passing tape A against the outer circumferential surface of the winding needle 11 located at the first station a1, it ensures that the tape A can be tightly wound on the winding needle 11, avoiding the phenomenon of loose or even falling off of the tape A.

[0052] When the roller assembly is in the third state, the first roller 211 is separated from the winding needle 11 located at the first station a1 (i.e., the first roller 211 stops pressing the tape A passing between the first roller 211 and the winding needle 11 located at the first station a1), and the second roller 221 is separated from the winding needle 11 located at the first station a1 (i.e., the second roller 221 also stops pressing the tape A passing between the second roller 221 and the winding needle 11 located at the first station a1).

[0053] Please continue to refer to FIG. 1 to FIG. 3, in actual use, first, control the first roller assembly 21 driven by the first roller 211 to resist the passing of the material tape A to the needle 11 located in the first station a1, control the second roller assembly 22 driven by the second roller 221 to resist the passing of the material tape A to the needle 11 located in the first station a1 (at this time, the roller assembly is in the first state described above); At the same time, the needle 11 located in the first station a1 keeps rotating, and the material tape A keeps conveying downstream; Control the rotation shaft 231 to move close to the needle 11 located in the first station a1 to the rolling cutting position, the rotation shaft 231 drives the cutter 232 to rotate so that the cutter 232 cuts the passing material tape A (when the cutter 232 cuts the material tape A, the air avoiding part 110 on the needle 11 located in the first station a1 also rotates to face the cutter 232 and the air blowing piece 233), the air flow blown by the air blowing piece 233 blows the upstream cut end A11 of the material tape A into the air avoiding part 110 of the needle 11 located in the first station a1, the air avoiding part 110 fixes the upstream cut end A11 of the entering material tape A in the air avoiding part 110 of the needle 11; Then, control the rotation shaft 231 to move away from the needle 11 located in the first station a1 to leave the rolling cutting position; Then, control the first roller assembly 21 to move away from the needle 11 located in the first station a1 to separate from the needle 11 (at this time, the roller assembly is in the second state described above); At this time, the pole piece material tape can be inserted into the gap between the material tape A and the needle 11 and / or the gap between the two layers of material tape A, so that the pole piece material tape is wound on the outer circumference of the needle 11 located in the first station a1 with the material tape A; After the material tape A is wound on the outer circumference of the needle 11 located in the first station a1 at least once, control the second roller assembly 22 driven by the second roller 221 to move away from the needle 11 located in the first station a1 to separate from the needle 11 (at this time, the roller assembly is in the third state described above). At this time, the needle 11 continues to wind the material tape A and the pole piece material tape.

[0054] Please refer to FIG. 4 to FIG. 7, in the embodiment of the present application, the roll cutting feeding assembly 23 further comprises a moving base 235, the rotating shaft 231 is rotatably connected to the moving base 235. The roll cutting feeding mechanism 20 further comprises a driving assembly 24, the moving base 235 is installed at the driving end of the driving assembly 24, so that the driving assembly 24 can drive the moving base 235 to move close to or away from the winding needle 11 located at the first station a1. When the driving assembly 24 drives the moving base 235 to move close to the winding needle 11 located at the first station a1, the rotating shaft 231 can be driven to the roll cutting position. When the driving assembly 24 drives the moving base 235 to move away from the winding needle 11 located at the first station a1, the rotating shaft 231 can be driven to move away from the roll cutting position. In this way, when it is needed to cut the material belt A, first, the first roller pressing assembly 21 is controlled to drive its first pressing roller 211 to press the passing material belt A onto the winding needle 11 located at the first station a1, and the second roller pressing assembly 22 is controlled to drive its second pressing roller 221 to press the passing material belt A onto the winding needle 11 located at the first station a1; then, under the driving action of the driving assembly 24, the moving base 235 drives the rotating shaft 231 to move close to the winding needle 11 located at the first station a1 until the rotating shaft 231 reaches the roll cutting position (at this time, the first pressing roller 211 is located at the upstream side of the roll cutting position, and the second pressing roller 221 is located at the downstream side of the roll cutting position. That is, the first pressing roller 211 is located at the upstream of the cutter 232, and the second pressing roller 221 is located at the downstream of the cutter 232), in this process, the cutter 232 and the air blowing member 233 on the rotating shaft 231 are rotated, and the winding needle 11 located at the first station a1 is also rotated. When the rotating shaft 231 reaches the roll cutting position, the cutter 232 and the air blowing member 233 on the rotating shaft 231 are opposite to the empty space 110 on the winding needle 11 located at the first station a1, so that the cutter 232 cuts the material belt A at the empty space 110, and the air flow blown by the air blowing member 233 to the empty space 110 blows the upstream cut end A11 of the material belt A into the empty space 110, and the upstream cut end A11 of the material belt A is fixed in the empty space 110 of the winding needle 11 located at the first station a1. After the upstream cut end A11 of the material belt A is fixed in the empty space 110 of the winding needle 11 located at the first station a1, under the driving action of the driving assembly 24, the moving base 235 drives the rotating shaft 231 to move away from the winding needle 11 located at the first station a1 by a certain distance, so that the air blowing member 233 and the cutter 232 on the rotating shaft 231 move away from the winding needle 11 located at the first station a1, to avoid the interference of the air blowing member 233 and the cutter 232 to the winding action of the winding needle 11 located at the first station a1.

[0055] It should be noted that the blowing member 233 is not limited to being mounted on the rotating shaft 231 to rotate with the rotating shaft 231. In some other embodiments, the blowing member 233 can be mounted on the moving seat 235 or other components, as long as it can blow the upstream cut end A11 of the material belt A into the empty space 110 on the winding needle 11 at the first station a1.

[0056] Further, the rotary feeding assembly 23 further comprises a rotating driving member 237 mounted on the moving seat 235, and the rotating driving member 237 is connected with the rotating shaft 231, so that the rotating driving member 237 can drive the rotating shaft 231 to rotate relative to the moving seat 235. Optionally, the rotating driving member 237 can be a motor. The output shaft of the rotating driving member 237 is connected with the rotating shaft 231 through a belt transmission structure, so that the rotating motion output by the rotating driving member 237 is transmitted to the rotating shaft 231 through the belt transmission structure, so that the rotating shaft 231 also rotates. Of course, the output shaft of the rotating driving member 237 can also be connected with the rotating shaft 231 through other transmission structures, such as a gear transmission structure, as long as it can drive the rotating shaft 231 to rotate, which is not limited here.

[0057] In some embodiments, the driving assembly 24 is used to drive the moving seat 235 to move along the horizontal direction X and the vertical direction Y, so as to drive the rotary feeding assembly 23 to approach or move away from the winding needle 11 at the first station a1. Optionally, the driving assembly 24 comprises a base 241, a first linear driving unit 243, a mounting seat 242, a second linear driving unit 245 and a moving seat 244. The mounting seat 242 is movably connected to the base 241 along the horizontal direction X, and the first linear driving unit 243 is arranged on the base 241 and connected with the mounting seat 242, so that the first linear driving unit 243 can drive the mounting seat 242 to move relative to the base 241 along the horizontal direction X. The moving seat 244 is movably connected to the mounting seat 242 along the vertical direction Y, and the second linear driving unit 245 is arranged on the mounting seat 242 and connected with the moving seat 244, so that the second linear driving unit 245 can drive the moving seat 244 to move relative to the mounting seat 242 along the vertical direction Y. The moving seat 235 of the rotary feeding assembly 23 is mounted on the moving seat 244, so that the moving seat 235 moves with the moving seat 244 (i.e. the rotary feeding assembly 23 moves with the moving seat 244). It should be noted that the first linear driving unit 243 can adopt a linear driving module, as long as it can drive the mounting seat 242 to move along the horizontal direction X, which is not limited here. The second linear driving unit 245 can adopt a linear driving module, as long as it can drive the moving seat 244 to move along the vertical direction Y, which is not limited here.

[0058] It should be noted that, not limited to the way of driving the moving seat 235 to move along the horizontal direction X and the vertical direction Y to realize the driving shaft 231 approaching or moving away from the winding needle 11 located at the first station a1, in other embodiments, please refer to FIGS. 8-10, the moving seat 235 can also be driven to move along a preset direction V to realize the driving shaft 231 approaching or moving away from the winding needle 11 located at the first station a1, the preset direction V is inclined to the horizontal direction X and the vertical direction Y. Specifically, the driving assembly 24 includes a fixed seat 246, a moving seat 244 and a third linear driving unit 247. The moving seat 244 is movably connected to the fixed seat 246 along the preset direction V. The third linear driving unit 247 is arranged on the fixed seat 246 and connected with the moving seat 244, so that the third linear driving unit 247 can drive the moving seat 244 to move along the preset direction V relative to the fixed seat 246. The moving seat 235 of the roll cutting and feeding assembly 23 is installed on the moving seat 244, so that the moving seat 235 moves along the preset direction V together with the moving seat 244. It should be noted that the third linear driving unit 247 can adopt a linear driving module, as long as it can drive the moving seat 244 to move along the preset direction V, which is not limited here.

[0059] It should be noted that the first roller pressing assembly 21 can be installed on the moving seat 244 of the driving assembly 24, so that when the driving assembly 24 drives the roll cutting and feeding assembly 23 to approach or move away from the winding needle 11 located at the first station a1, the first roller pressing assembly 21 can also be driven to approach or move away from the winding needle 11 located at the first station a1. That is, the first roller pressing assembly 21 and the roll cutting and feeding assembly 23 share the same driving assembly 24, and there is no need to additionally configure a driving assembly 24 for the first roller pressing assembly 21, which greatly simplifies the equipment structure, reduces the space required, and reduces the difficulty of spatial layout of the components of the roll cutting and feeding mechanism 20.

[0060] In the embodiment, the first roller pressing assembly 21 comprises a first mounting frame 212 and a first elastic member 214. The first roller 211 is rotatably connected to the first mounting frame 212. The first mounting frame 212 is movably connected to the transfer seat 244, and the first elastic member 214 is connected between the first mounting frame 212 and the transfer seat 244. The first elastic member 214 is configured to provide an elastic force to the first mounting frame 212 to make the first mounting frame 212 have a tendency to drive the first roller 211 to move close to the winding needle 11 at the first station a1. Thus, during the movement of the transfer seat 244 to move close to the winding needle 11 at the first station a1, the first roller 211 first presses the passing tape A against the winding needle 11 at the first station a1. As the transfer seat 244 continues to move close to the winding needle 11 at the first station a1, the first mounting frame 212 is driven to move relative to the transfer seat 244 against the elastic force provided by the first elastic member 214, until the transfer seat 244 drives the shaft 231 to reach the above-mentioned rolling cutting position. That is, before the passing tape A is cut by the cutting knife 232, the first roller 211 first presses the passing tape A against the winding needle 11 at the first station a1.

[0061] During the movement of the transfer seat 244 away from the winding needle 11 at the first station a1, the transfer seat 244 first drives the shaft 231 to move away from the above-mentioned rolling cutting position, so that the cutting knife 232 and the air blowing member 233 on the shaft 231 avoid the winding action of the winding needle 11 at the first station a1. During this process, the first mounting frame 212 is reset relative to the transfer seat 244 under the elastic force provided by the first elastic member 214, so that the first roller 211 continues to press the passing tape A against the winding needle 11. As the transfer seat 244 continues to move away from the winding needle 11 at the first station a1, the first mounting frame 212 is reset relative to the transfer seat 244, and then drives the first roller 211 to move away from the winding needle 11 at the first station a1, so that the first roller 211 releases the tape A between the first roller 211 and the winding needle 11.

[0062] In one embodiment, the first mounting frame 212 is rotatably connected to the transfer seat 244 through a first pivot shaft 215, and the first elastic member 214 is connected between the first mounting frame 212 and the transfer seat 244. The first elastic member 214 is configured to provide an elastic force to the first mounting frame 212 to make the first mounting frame 212 have a tendency to drive the first roller 211 to rotate close to the winding needle 11 at the first station a1. Alternatively, the first elastic member 214 can be a tension spring.

[0063] Thus, during the process that the moving seat 244 moves close to the winding needle 11 at the first station a1, the first pressing roller 211 first presses the material belt A against the winding needle 11 at the first station a1. As the moving seat 244 continues to move close to the winding needle 11 at the first station a1, the first mounting frame 212 rotates upward relative to the moving seat 244 against the elastic force provided by the first elastic member 214 (the stretching amount of the first elastic member 214 gradually increases), thereby providing space for the moving seat 244 to continue to move close to the winding needle 11 at the first station a1, until the moving seat 244 drives the rotating shaft 231 to reach the above-mentioned cutting position (at this time, the cutter 232 and the air blowing member 233 on the rotating shaft 231 are close enough to the winding needle 11 to ensure that the cutter 232 can cut the material belt A passing through, and the air flow blown by the air blowing member 233 can blow the upstream cut end Al l of the material belt A into the air avoiding portion 110 of the winding needle 11).

[0064] During the process that the moving seat 244 moves away from the winding needle 11 at the first station a1, the moving seat 244 first drives the rotating shaft 231 to move away from the above-mentioned cutting position, so that the cutter 232 and the air blowing member 233 on the rotating shaft 231 avoid the winding action of the winding needle 11 at the first station a1. During this process, under the action of the elastic force provided by the first elastic member 214, the first mounting frame 212 rotates downward relative to the moving seat 244 (at this time, the stretching amount of the first elastic member 214 gradually decreases), so that the first pressing roller 211 continues to press the material belt A against the winding needle 11. As the moving seat 244 continues to move away from the winding needle 11 at the first station a1, after the first mounting frame 212 rotates relative to the moving seat 244 to reset, the first mounting frame 212 drives the first pressing roller 211 to move away from the winding needle 11 at the first station a1, so that the first pressing roller 211 releases the material belt A passing through between the first pressing roller 211 and the winding needle 11.

[0065] It should be noted that the elastic floating effect of the first pressing roller 211 is not limited to the mode that the first mounting frame 212 rotates relative to the moving seat 244. In another embodiment, the elastic floating effect of the first pressing roller 211 can also be achieved by the mode that the first mounting frame 212 moves relative to the moving seat 244. Please refer to FIGS. 8 to 10, specifically, the first mounting frame 212 is movably connected to the moving seat 244, and the first elastic member 214 is abutted between the first mounting frame 212 and the moving seat 244. The first elastic member 214 is used to provide an elastic force that makes the first mounting frame 212 have a moving trend to move close to the winding needle 11 at the first station a1. Optionally, the first elastic member 214 can be a compression spring or an air cylinder. When the first elastic member 214 is an air cylinder, the elastic force provided by the first elastic member 214 is constant, so that the pressing force of the first pressing roller 211 against the material belt A is also constant, thereby avoiding that the pressing force against the material belt A is too large or too small.

[0066] It should be noted that the second roller pressing assembly 22 can also be mounted on the moving seat 244 of the driving assembly 24, so that when the driving assembly 24 drives the rotary cutting and feeding assembly 23 to move close to or away from the winding needle 11 located at the first station a1, the driving assembly 24 can also drive the second roller pressing assembly 22 to move close to or away from the winding needle 11 located at the first station a1. That is, the second roller pressing assembly 22 and the rotary cutting and feeding assembly 23 share the same driving assembly 24, and an additional driving assembly 24 does not need to be configured for the second roller pressing assembly 22, which greatly simplifies the structure of the equipment, reduces the space required, and reduces the difficulty of spatial layout of the components of the rotary cutting and feeding mechanism 20.

[0067] In the embodiment, the second roller pressing assembly 22 includes a second mounting frame 222 and a second elastic member. The second pressing roller 221 is rotatably connected to the second mounting frame 222. The second mounting frame 222 is movably connected to the moving seat 44, and the second elastic member is connected between the second mounting frame 222 and the moving seat 44. The second elastic member is used to provide an elastic force for the second mounting frame 222 to have a movement trend of driving the second pressing roller 221 to move close to the winding needle 11 located at the first station a1. In this way, during the movement of the moving seat 244 to move close to the winding needle 11 located at the first station a1, the second pressing roller 221 first presses the passing strip A to the winding needle 11 located at the first station a1, and as the moving seat 244 continues to move close to the winding needle 11 located at the first station a1, the second mounting frame 222 moves relative to the moving seat 44 against the elastic force provided by the second elastic member, until the moving seat 244 drives the rotating shaft 231 to reach the above-mentioned rotary cutting position. That is, before the passing strip A is rotary cut by the cutting knife 232, the second pressing roller 221 first presses the passing strip A to the winding needle 11 located at the first station a1.

[0068] During the movement of the moving seat 244 to move away from the winding needle 11 located at the first station a1, the moving seat 244 first drives the rotating shaft 231 to move away from the above-mentioned rotary cutting position, so that the cutting knife 232 and the air blowing member 233 on the rotating shaft 231 avoid the winding action of the winding needle 11 located at the first station a1. During this process, under the action of the elastic force provided by the second elastic member, the second mounting frame 222 moves back relative to the moving seat 44, so that the second pressing roller 221 continues to press the passing strip A to the winding needle 11 located at the first station a1. As the moving seat 244 continues to move away from the winding needle 11 located at the first station a1, after the second mounting frame 222 moves back relative to the moving seat 44, the second mounting frame 222 drives the second pressing roller 221 to move away from the winding needle 11 located at the first station a1, so that the second pressing roller 221 releases the strip A passing between the second pressing roller 221 and the winding needle 11.

[0069] In one embodiment, the second mounting frame 222 is rotatably connected to the transfer seat 244 through a second pivot shaft, and a second elastic member is connected between the second mounting frame 222 and the transfer seat 244. The second elastic member is used to provide a spring force for enabling the second mounting frame 222 to drive the second pressure roller 221 to move close to the winding needle 11 located at the first station a1. Optionally, the second elastic member can be a tension spring.

[0070] Thus, in the process that the transfer seat 244 moves close to the winding needle 11 located at the first station a1, the second pressure roller 221 first presses the material strip A passing therethrough onto the winding needle 11 located at the first station a1. As the transfer seat 244 continues to move close to the winding needle 11 located at the first station a1, the second mounting frame 222 rotates downward relative to the transfer seat 244 against the spring force provided by the second elastic member (the extension amount of the second elastic member gradually increases), thereby providing space for the transfer seat 244 to continue to move close to the winding needle 11 located at the first station a1, until the transfer seat 244 drives the rotating shaft 231 to reach the above-mentioned cutting position (at this time, the cutter 232 and the air blowing member 233 on the rotating shaft 231 are close enough to the winding needle 11 to ensure that the cutter 232 can cut the material strip A passing therethrough, and the air flow blown by the air blowing member 233 can blow the upstream cut end Al l of the material strip A into the air avoiding portion 110 of the winding needle 11).

[0071] In the process that the transfer seat 244 moves away from the winding needle 11 located at the first station a1, the transfer seat 244 first drives the rotating shaft 231 to move away from the above-mentioned cutting position, so that the cutter 232 and the air blowing member 233 on the rotating shaft 231 avoid the winding action of the winding needle 11 located at the first station a1. In this process, under the action of the spring force provided by the second elastic member, the second mounting frame 222 rotates upward relative to the transfer seat 244 (at this time, the extension amount of the second elastic member gradually decreases), so that the second pressure roller 221 continues to press the material strip A onto the winding needle 11. As the transfer seat 244 continues to move away from the winding needle 11 located at the first station a1, the second mounting frame 222 rotates back relative to the transfer seat 244 and then drives the second pressure roller 221 to move away from the winding needle 11 located at the first station a1, so that the second pressure roller 221 releases the material strip A passing between the second pressure roller 221 and the winding needle 11.

[0072] It should be noted that the elastic floating effect of the second compression roller 221 is not limited to the way that the second mounting frame 222 rotates relative to the moving seat 244. In another embodiment, the elastic floating effect of the second compression roller 221 can also be achieved by moving the second mounting frame 222 relative to the moving seat 244. Specifically, the second mounting frame 222 is movably connected to the moving seat 244, and a second elastic member abuts between the second mounting frame 222 and the moving seat 244. The second elastic member is used to provide an elastic force that makes the second mounting frame 222 have a moving trend close to the winding needle 11 located at the first station a1. Optionally, the second elastic member can be a compression spring or an air cylinder. When the second elastic member is an air cylinder, the elastic force provided by the second elastic member is constant, so that the pressing force of the second compression roller 221 on the material belt A is also constant, thereby avoiding that the pressing force on the material belt A is too large or too small.

[0073] It should be noted that in the embodiment in which the first roller pressing assembly 21 and the second roller pressing assembly 22 share the same driving assembly 24 with the roll-cut feeding assembly 23, the movement stroke of the first mounting frame 212 relative to the moving seat 244 and the movement stroke of the second mounting frame 222 relative to the moving seat 244 can be designed according to the actual working condition. On the one hand, during the process that the moving seat 244 approaches the winding needle 11 located at the first station a1, the first compression roller 211 and the second compression roller 221 first press the passing material belt A on the winding needle 11 located at the first station a1, respectively, and then the rotating shaft 231 reaches the roll-cut position, and then the cutting knife 232 and the air blowing member 233 on the rotating shaft 231 cut and blow the upstream cut end A11 of the material belt A into the air avoiding portion 110 of the winding needle 11. On the other hand, during the process that the moving seat 244 moves away from the winding needle 11 located at the first station a1, the rotating shaft 231 first moves away from the roll-cut position (i.e., the cutting knife 232 and the air blowing member 233 on the rotating shaft 231 avoid the winding action of the winding needle 11 located at the first station a1), then the first compression roller 211 moves away from the winding needle 11 located at the first station a1 (i.e., the first compression roller 211 releases the pressing on the passing material belt A, so that the material belt A can be smoothly inserted into the gap between the material belt A and the winding needle 11 located at the first station a1 and / or between two layers of material belts A), and then the second compression roller 221 moves away from the winding needle 11 located at the first station a1 (i.e., the second compression roller 221 releases the pressing on the passing material belt A) after the winding needle 11 located at the first station a1 winds the material belt A at least once, thereby avoiding that the material belt A on the winding needle 11 is loose or even falls off when winding the first layer of material belt A.

[0074] Please refer to FIGS. 8-11, in the embodiment of the present application, the first roller pressing assembly 21 further comprises a rotary driving member 216 installed on the first mounting frame 212. The rotary driving member 216 is connected with the first pressing roller 211, so that the rotary driving member 216 can drive the first pressing roller 211 to rotate. Thus, after the material strip A is cut off, the material strip A pressed by the first pressing roller 211 on the needle 11 at the first station a1 loses the traction downstream, at this time the rotary driving member 216 drives the first pressing roller 211 to rotate, and the rotating direction of the first pressing roller 211 is opposite to the rotating direction of the needle 11 at the first station a1, so that the first pressing roller 211 and the needle 11 at the first station a1 jointly drive the material strip A between them to move downstream to be wound on the outer circumferential surface of the needle 11, thereby greatly reducing the risk of the upstream cut end A11 of the material strip A escaping from the void portion 110 of the needle 11. Optionally, the rotary driving member 216 can be an electric motor.

[0075] Further, the first roller pressing assembly 21 further comprises a driving wheel, a driven wheel 217 and a transmission belt 218. The driving wheel is installed on the output shaft of the rotary driving member 216, so that the rotary driving member 216 can drive the driving wheel to rotate. The driven wheel 217 is installed on the first pressing roller 211, so that the driven wheel 217 can drive the first pressing roller 211 to rotate. The transmission belt 218 is sleeved between the driving wheel and the driven wheel 217, so that the driving wheel can drive the driven wheel 217 to rotate through the transmission belt 218 when the driving wheel rotates. Thus, when the first pressing roller 211 needs to be driven to rotate, the rotary driving member 216 drives the driving wheel to rotate, the driving wheel drives the driven wheel 217 to rotate through the transmission belt 218, and the driven wheel 217 drives the first pressing roller 211 to rotate.

[0076] It should be noted that the rotary driving member 216 is not limited to being connected with the first pressing roller 211 by a belt transmission structure, in other embodiments, the rotary driving member 216 can also be connected with the first pressing roller 211 by other transmission structures such as gear transmission structure, as long as it can drive the first pressing roller 211 and the needle 11 at the first station a1 to rotate in opposite directions, which is not limited in this regard.

[0077] In the embodiment of the present application, the roll cutting and feeding assembly 23 further comprises an auxiliary air blowing member (not marked in the figure) located on the upstream side of the cutter 232, which is used to blow air to the void portion 110 of the needle 11 at the first station a1 to blow the upstream cut end A11 of the material strip A formed after the material strip A is cut by the cutter 232 into the void portion 110 of the needle 11 at the first station a1. Thus, by using the air blowing member 233 and the auxiliary air blowing member to blow air to the void portion 110 of the needle 11 at the first station a1 at the same time, it is ensured that the upstream cut end A11 of the material strip A is quickly and accurately blown into the void portion 110 of the needle 11 at the first station a1.

[0078] In the embodiment, the auxiliary air blowing member is controllably moved to the upstream side of the cutter 232 close to the winding needle 11 at the first station a1, so that the auxiliary air blowing member can accurately blow the upstream cut end A11 of the material tape A into the air avoiding portion 110 on the winding needle 11 at the first station a1.

[0079] Optionally, the auxiliary air blowing member is mounted on the moving seat 235. When the driving assembly 24 drives the moving seat 235 to move close to the winding needle 11 at the first station a1, the auxiliary air blowing member on the moving seat 235 and the rotating shaft 231 and the cutter 232 and the air blowing member 233 on the rotating shaft 231 are also moved close to the winding needle 11 at the first station a1. When the driving assembly 24 drives the moving seat 235 to move away from the winding needle 11 at the first station a1, the auxiliary air blowing member on the moving seat 235 and the rotating shaft 231 and the cutter 232 and the air blowing member 233 on the rotating shaft 231 are also moved away from the winding needle 11 at the first station a1. In this way, the auxiliary air blowing member does not need to be additionally provided with a driving assembly 24, which is conducive to simplifying the structure, reducing the space required, and reducing the difficulty of spatial layout of the components.

[0080] Of course, in other embodiments, a driving unit can also be provided for the auxiliary air blowing member to drive the auxiliary air blowing member to move close to or away from the winding needle 11 at the first station a1, as long as the air flow blown by the air blowing member 233 and the auxiliary air blowing member can collectively blow the upstream cut end A11 of the material tape A into the air avoiding portion 110 on the winding needle 11 at the first station a1, which is not limited herein.

[0081] Specifically, the auxiliary air blowing member has a second air knife opening for blowing air flow. The second air knife opening can be a strip-shaped air outlet groove extending longitudinally in a direction parallel to the axial direction of the rotating shaft 231, or can be a plurality of air outlet holes arranged in a spaced manner in a direction parallel to the axial direction of the rotating shaft 231, as long as the upstream cut end A11 of the material tape A can be accurately and quickly blown into the air avoiding portion 110 on the winding needle 11 at the first station a1 when the material tape A is cut, which is not limited herein.

[0082] Referring to FIGS. 12 to 14, in the embodiment of the present application, the winding needle 11 also has a first side wall 111 and a second side wall 112 as opposite side walls of the air avoiding portion 110. The first side wall 111 is provided with a blowing portion B1 for blowing air to the second side wall 112 to blow and press the upstream cut end A11 of the material tape A entering the air avoiding portion 110 onto the second side wall 112, so as to fix the upstream cut end A11 of the material tape A entering the air avoiding portion 110 on the second side wall 112, so that the winding needle 11 can wind the material tape A on the outer peripheral surface of the winding needle 11 when rotating.

[0083] Thus, when the cutting knife 232 cuts the material belt A, the upstream cut end A11 of the material belt A is blown into the empty portion 110 of the winding needle 11 at the first station a1 by the air flow blown by the air blowing member 233. At this time, the upstream cut end A11 of the material belt A entering the empty portion 110 is tightly attached to the second side wall 112 by the air flow blown by the blowing part B1 on the first side wall 111, that is, the upstream cut end A11 of the material belt A is fixed on the second side wall 112, which, on one hand, completes the cutting of the material belt A and fixes the material belt A on the winding needle 11 without stopping the downstream conveying of the material belt A and rotating the winding needle 11, greatly improving the production efficiency; on the other hand, cancels the needle threading and film combining actions, greatly simplifying the structure of the winding equipment.

[0084] It should be noted that the air flow blown by the blowing part B1 is used to fix the upstream cut end A11 of the material belt A on the second side wall 112, which avoids installing a clamping mechanism for clamping the material belt A inside the winding needle 11, greatly simplifies the structure of the winding needle 11, and reduces the design difficulty and manufacturing cost of the winding needle 11.

[0085] Specifically, in the embodiment, during the rotation of the winding needle 11 at the first station a1, when the empty portion 110 on the winding needle 11 rotates to be opposite to the cutting knife 232 (that is, when the empty portion 110 on the winding needle 11 rotates to the position where the cutting knife 232 cuts the material belt A), the first side wall 111 is located downstream of the second side wall 112, so that the upstream cut end A11 of the material belt A can be directly bent towards the second side wall 112 in the empty portion 110 under the action of the air flow blown by the air blowing member 233, and tightly attached to the second side wall 112 under the action of the air flow blown by the blowing part B1, ensuring that the upstream cut end A11 of the material belt A can be accurately and quickly blown and tightly attached to the second side wall 112.

[0086] Specifically, in the embodiment, the blowing passage B3 is provided in the winding needle 11, which is used to communicate with an external air source. The first cover plate 117 is provided in the empty portion 110. The side surface of the first cover plate 117 facing the second side wall 112 serves as the first side wall 111, and a plurality of blowing holes serving as the blowing part B1 are provided in the first cover plate 117, each of which communicates with the blowing passage B3. Thus, the high-pressure gas provided by the external air source enters the blowing passage B3 and is blown out of each blowing hole, so as to blow and press the upstream cut end A11 of the material belt A on the second side wall 112. It should be noted that the external air source is an air supply device capable of providing high-pressure gas, which is not particularly limited here.

[0087] It should be noted that by setting the first cover plate 117 inside the avoidance part 110 and forming a plurality of blowing holes on the first cover plate 117, and then blowing the upstream cut end A11 of the material belt A on the second side wall 112 by the airflow blown out of each blowing hole, only the first cover plate 117 needs to be replaced when the first cover plate 117 is worn out or damaged during long-term use, avoiding the need to replace the entire winding needle 11, greatly reducing the maintenance difficulty and maintenance cost. Alternatively, the first cover plate 117 can be locked and fixed inside the avoidance part 110 by a threaded fastener (such as a screw) to facilitate the installation and removal of the first cover plate 117.

[0088] In the embodiment of the present application, the second side wall 112 is provided with a suction part B2 for suction, which is used to suck the upstream cut end A11 of the material belt A on the second side wall 112 by using the negative pressure generated by suction. In this way, after the upstream cut end A11 of the material belt A enters the avoidance part 110 of the winding needle 11, the airflow blown out of each blowing hole blows the upstream cut end A11 of the material belt A onto the second side wall 112, and at the same time the suction part B2 on the second side wall 112 sucks the upstream cut end A11 of the material belt A on the second side wall 112, thereby making the upstream cut end A11 of the material belt A be fixed on the second side wall 112 more quickly and stably.

[0089] Specifically, the winding needle 11 is provided with a suction passage B4 for communicating with an external negative pressure source. The avoidance part 110 is provided with a second cover plate 118. One side surface of the second cover plate 118 facing the first side wall 111 serves as the second side wall 112, and is provided with a plurality of suction holes as the suction part B2, each of which communicates with the suction passage B4. In this way, the external negative pressure source evacuates the suction passage B4 to make the suction passage B4 in a negative pressure state, and the negative pressure in the suction passage B4 is transmitted to each suction hole, thereby the upstream cut end A11 of the material belt A is adsorbed and fixed by the negative pressure generated at each suction hole. It should be noted that the external negative pressure source can be a vacuum device capable of generating negative pressure, which is not limited here.

[0090] It should be noted that by setting the second cover plate 118 inside the avoidance part 110 and forming a plurality of suction holes on the second cover plate 118, and then adsorbing and fixing the upstream cut end A11 of the material belt A on the second cover plate 118 by the negative pressure generated at each suction hole, only the second cover plate 118 needs to be replaced when the second cover plate 118 is worn out or damaged during long-term use, avoiding the need to replace the entire winding needle 11, greatly reducing the maintenance difficulty and maintenance cost. Alternatively, the second cover plate 118 can be locked and fixed inside the avoidance part 110 by a threaded fastener (such as a screw) to facilitate the installation and removal of the second cover plate 118.

[0091] Further, the winding needle mechanism 10 further comprises a connecting shaft 12 (see Fig. 12) and an air slide ring 13 (see Fig. 12). The winding needle 11 is mounted on the connecting shaft 12 so that the connecting shaft 12 can drive the winding needle 11 to rotate. The air slide ring 13 is mounted on the connecting shaft 12, and the blowing channel B3 is communicated with the external air source through the air slide ring 13, and the suction channel B4 is communicated with the external negative pressure source through the air slide ring 13. In this way, the air slide ring 13 realizes the communication of the blowing channel B3 with the external air source and the communication of the suction channel B4 with the external negative pressure source, avoiding the phenomenon of pipeline winding when the connecting shaft 12 drives the winding needle 11 to rotate.

[0092] Specifically, the air slide ring 13 comprises a stator 131 and a rotor 133. The stator 131 is fixed, and the rotor 133 is mounted on the connecting shaft 12 to rotate synchronously with the connecting shaft 12. The stator 131 has a first air joint D1 and a second air joint D2, and the rotor 133 has a third air joint D3 and a fourth air joint D4, and the first air joint D1 is communicated with the third air joint D3 through the air passage inside the stator 131 and the rotor 133. The winding needle 11 has a fifth air joint D5 communicated with the blowing channel B3 and a sixth air joint D6 communicated with the suction channel B4.

[0093] The first air joint D1 is used to communicate with the external air source through a pipeline, and the third air joint D3 is communicated with the fifth air joint D5 through a pipeline, so that the high-pressure gas provided by the external air source enters the blowing channel B3 through the first air joint D1, the stator 131, the rotor 133, the third air joint D3 and the fifth air joint D5 in turn, and then is blown out by each blowing hole.

[0094] The second air joint D2 and the fourth air joint D4 are communicated through the air passage inside the stator 131 and the rotor 133, the second air joint D2 is communicated with the external negative pressure source through a pipeline, and the fourth air joint D4 is communicated with the sixth air joint D6 through a pipeline, so that the external negative pressure source sequentially passes through the second air joint D2, the stator 131, the rotor 133, the fourth air joint D4 and the sixth air joint D6 to vacuumize the suction channel B4, so that the suction channel B4 is in a negative pressure state, and then the negative pressure in the suction channel B4 is transmitted to each suction hole, so that the upstream cut end A11 of the material belt A is adsorbed by the negative pressure generated at each suction hole. It should be noted that the specific structure of the stator 131 and the rotor 133 of the air slide ring 13 can adopt a relatively mature existing technology, which is not limited here.

[0095] It should be noted that the clearance 110 on the winding needle 11 is not limited to one, and in other embodiments, as shown in FIGS. 14 and 15, the winding needle 11 has at least two clearances 110, and each clearance 110 is arranged along the circumference of the winding needle 11. In this way, when the material belt A needs to be cut off, the winding needle 11 is rotated to any clearance 110 opposite the cutter 232 and the air blowing member 233, which greatly reduces the risk that the clearance 110 on the winding needle 11 has not rotated to the position opposite the cutter 232 when the cutter 232 cuts off the material belt A.

[0096] Please continue to refer to FIGS. 12-14, in some embodiments, the winding needle 11 includes a first outer needle 113 and a second outer needle 114 arranged opposite each other. The first outer needle 113 and the second outer needle 114 form the above-mentioned clearance 110. The outer side walls of the first outer needle 113 and the second outer needle 114, which are away from each other, together form the above-mentioned outer circumferential surface. One of the inner side walls of the first outer needle 113 and the second outer needle 114, which are towards each other, is the above-mentioned first side wall 111, and the other is the above-mentioned second side wall 112.

[0097] Further, the winding needle 11 further includes a winding needle base 119, a first fixed needle 115, and a second fixed needle 116. The winding needle base 119 is mounted on the connecting shaft 12, so that the winding needle base 119 can rotate synchronously with the connecting shaft 12. One end of the first fixed needle 115 and the second fixed needle 116 is mounted on the winding needle base 119, so that the first fixed needle 115 and the second fixed needle 116 rotate synchronously with the winding needle base 119. The first outer needle 113 is arranged on the first fixed needle 115, and the second outer needle 114 is arranged on the second fixed needle 116. The first outer needle 113 and the second outer needle 114 form a gap. The part of the gap on the same side of the first fixed needle 115 and the second fixed needle 116 is one clearance 110, and the part of the gap on the other side of the first fixed needle 115 and the second fixed needle 116 is another clearance 110. In particular to FIG. 14, the part of the gap on the left side of the first fixed needle 115 and the second fixed needle 116 is one clearance 110, and the part of the gap on the right side of the first fixed needle 115 and the second fixed needle 116 is another clearance 110.

[0098] It should be noted that the gap between the first outer needle 113 and the second outer needle 114 is not limited to being used as the clearance 110, and the clearance 110 can also be formed at other parts of the winding needle 11. Please refer to FIG. 15, alternatively, a groove is formed on the outer side wall of the first outer needle 113 away from the second outer needle 114, which is used as one clearance 110; and / or, a groove is formed on the outer side wall of the second outer needle 114 away from the first outer needle 113, which is used as one clearance 110.

[0099] It should be noted that after the winding of the winding core on the winding needle 11 is completed, the winding core needs to be clamped and fixed by the clamping needle, and then the winding needle 11 is controlled to be withdrawn from the winding core so that the winding core is separated from the winding needle 11 (at this time, the air blowing part B1 stops blowing air flow, and the negative pressure generated at the suction part B2 is stopped), that is, the discharging of the winding core is completed. The groove on the first outer needle 113 and / or the second outer needle 114 can also be used for the clamping needle to insert, so as to facilitate the clamping of the clamping needle on the winding core on the winding needle 11.

[0100] Please continue to refer to FIGS. 1-3, in the embodiment of the present application, the winding device further comprises a turret 30, and the number of winding needle mechanisms 10 is at least two. The turret 30 is rotatably arranged, and the winding needle 11 of each winding needle mechanism 10 is rotatably connected to the turret 30 through the connecting shaft 12. The winding needle 11 of each winding needle mechanism 10 sequentially passes through the first station a1 and the second station a2 during the rotation of the turret 30. When the winding needle 11 located at the first station a1 rotates to the second station a2 with the turret 30, the other winding needle 11 rotates to the first station a1 with the turret 30.

[0101] In this way, when the winding of the winding core on the winding needle 11 located at the first station a1 is completed, first, the material belt A continues to be conveyed downstream, the turret 30 drives the winding needle 11 located at the first station a1 to rotate to the second station a2, and the other winding needle 11 rotates to the first station a1 with the turret 30. At this time, the winding needle 11 located at the first station a1 rotates around its own axis, and the first roller pressing assembly 21 drives the first pressure roller 211 to press the part of the material belt A located upstream of the cutter 232 on the winding needle 11 located at the first station a1, and the second roller pressing assembly 22 drives the second pressure roller 221 to press the part of the material belt A located downstream of the cutter 232 on the winding needle 11 located at the first station a1, and the rotating shaft 231 gradually moves to the rolling cutting position close to the winding needle 11 located at the first station a1, and the hollow part 110 on the winding needle 11 located at the first station a1 rotates to the position opposite to the cutter 232 and the air blowing piece 233 on the rotating shaft 231. At this time, the rotating shaft 231 drives the cutter 232 to rotate and contact the material belt A, and then cuts the material belt A (that is, the cutter 232 rolls and cuts the passing material belt A). Then, under the action of the air flow blown by the air blowing piece 233, the upstream cut end A11 of the material belt A is blown into the hollow part 110 on the winding needle 11 located at the first station a1, and then tightly adheres to the second side wall 112 in the hollow part 110 under the combined action of the air blowing of the air blowing part B1 and the negative pressure generated by the suction part B2.

[0102] After the upstream cut end A11 of the material belt A is blown into the empty portion 110 of the winding needle 11 located at the first station a1, the rotating shaft 231 gradually moves away from the winding needle 11 located at the first station a1 under the driving action of the driving assembly 24, so that the cutter 232 and the blowing member 233 on the rotating shaft 231 move away from the winding needle 11 located at the first station a1 to play a role of avoiding the winding needle 11. Then, the first roller pressing assembly 21 drives the first pressing roller 211 to move away from the winding needle 11 located at the first station a1, and inserts the pole piece between the material belt A and the outer circumferential surface of the winding needle 11 located at the first station a1 and / or between the two layers of material belt A, so that the pole piece is wound on the winding needle 11 located at the first station a1 together with the material belt A. Then, after the winding needle 11 located at the first station a1 winds the material belt A on the outer circumferential surface at least one turn, the second roller pressing assembly 22 drives the second pressing roller 221 to move away from the winding needle 11 located at the first station a1. In this process, the winding needle 11 located at the first station a1 continues to rotate to wind the material belt A on the outer circumferential surface to form a winding core.

[0103] After the material belt A is cut by the cutter 232, the winding needle 11 located at the second station a2 continues to wind until the cut material belt A is completely wound on the outer circumferential surface, and then the winding core on the winding needle 11 located at the second station a2 is subjected to end sealing and / or material cutting and the like.

[0104] Specifically, the winding device further comprises a first unwinding mechanism, a second unwinding mechanism, a third unwinding mechanism, a fourth unwinding mechanism, a first sheet inserting mechanism 40 and a second sheet inserting mechanism 50.

[0105] The first unwinding mechanism is used to output the first diaphragm A1 to the first station a1, the second unwinding mechanism is used to output the first pole piece material belt A3 to the first station a1, the third unwinding mechanism is used to output the second diaphragm A2 to the first station a1, and the fourth unwinding mechanism is used to output the second pole piece material belt A4 to the first station a1. The first sheet inserting mechanism 40 is arranged between the second unwinding mechanism and the first station a1. The first sheet inserting mechanism 40 is used to cut the first pole piece material belt A3 passing through, and send the starting end of the first pole piece material belt A3 to the winding needle 11 located at the first station a1, so that the winding needle 11 located at the first station a1 can wind the first pole piece material belt A3 when rotating. The second sheet inserting mechanism 50 is arranged between the fourth unwinding mechanism and the first station a1. The second sheet inserting mechanism 50 is used to cut the second pole piece material belt A4 passing through, and send the starting end of the second pole piece material belt A4 to the winding needle 11 located at the first station a1, so that the winding needle 11 located at the first station a1 can wind the second pole piece material belt A4 when rotating.

[0106] Thus, in actual use, the first unwinding mechanism, the second unwinding mechanism, the third unwinding mechanism and the fourth unwinding mechanism respectively output the first diaphragm A1, the first pole piece tape A3, the second diaphragm A2 and the second pole piece tape A4 to the winding needle 11 located at the first station a1. The winding needle 11 located at the first station a1 rotates to wind the first diaphragm A1, the first pole piece tape A3, the second diaphragm A2 and the second pole piece tape A4 to form a winding core. It should be noted that the above-mentioned tape A refers to the first diaphragm A1 and the second diaphragm A2.

[0107] When the winding core on the winding needle 11 located at the first station a1 is wound, first, the first insertion piece mechanism 40 cuts off the first pole piece tape A3 passing through, and the second insertion piece mechanism 50 cuts off the second pole piece tape A4 passing through. Then, the turret 30 rotates until the winding needle 11 located at the first station a1 reaches the second station a2, and another winding needle 11 reaches the first station a1 and rotates around its own axis. At the same time, the first roller pressing assembly 21 drives the first pressing roller 211 to press the part of the first diaphragm A1 and the second diaphragm A2 upstream of the cutter 232 tightly on the winding needle 11 located at the first station a1, the second roller pressing assembly 22 drives the second pressing roller 221 to press the part of the first diaphragm A1 and the second diaphragm A2 downstream of the cutter 232 tightly on the winding needle 11 located at the first station a1, the rotating shaft 231 gradually moves to the rolling cutting position by approaching the winding needle 11 located at the first station a1, and the hollow part 110 on the winding needle 11 located at the first station a1 rotates to be opposite to the cutter 232 and the air blowing member 233 on the rotating shaft 231. At this time, the rotating shaft 231 drives the cutter 232 to rotate and contact the first diaphragm A1 and the second diaphragm A2, and then cuts off the first diaphragm A1 and the second diaphragm A2 (i.e. the cutter 232 performs rolling cutting on the first diaphragm A1 and the second diaphragm A2 passing through). Then, under the action of the airflow blown by the air blowing member 233, the upstream cut end A11 of the first diaphragm A1 and the second diaphragm A2 is blown into the hollow part 110 of the winding needle 11 located at the first station a1, and then tightly adheres to the second side wall 112 in the hollow part 110 under the combined action of the blowing of the air blowing part B1 and the negative pressure generated by the suction part B2.

[0108] After the upstream cut ends A11 of the first diaphragm A1 and the second diaphragm A2 are blown into the empty part 110 of the winding needle 11 located at the first station a1, the rotating shaft 231 gradually moves away from the winding needle 11 located at the first station a1 under the driving action of the driving assembly 24, so that the cutter 232 and the blowing member 233 on the rotating shaft 231 move away from the winding needle 11 located at the first station a1 to play a role of avoiding the winding needle 11. Then, the first roller pressing assembly 21 drives the first compression roller 211 to move away from the winding needle 11 located at the first station a1, and then the first tab mechanism 40 is used to insert the starting end of the first pole piece material belt A3 between the first diaphragm A1 and the second diaphragm A2, so that the first pole piece material belt A3 is wound on the winding needle 11 located at the first station a1 together with the first diaphragm A1 and the second diaphragm A2. At the same time, the second tab mechanism 50 also inserts the starting end of the second pole piece material belt A4 between the second diaphragm A2 and the winding needle 11 located at the first station a1, so that the second pole piece material belt A4 is wound on the winding needle 11 located at the first station a1 together with the second diaphragm A2. Then, after the winding needle 11 located at the first station a1 winds the first diaphragm A1 and the second diaphragm A2 on the outer circumferential surface for at least one turn, the second roller pressing assembly 22 drives the second compression roller 221 to move away from the winding needle 11 located at the first station a1. In this process, the winding needle 11 located at the first station a1 keeps rotating to wind the first diaphragm A1, the second diaphragm A2, the first pole piece material belt A3 and the second pole piece material belt A4 on the outer circumferential surface to form a winding core.

[0109] It should be noted that the winding operation steps described above are only an embodiment. Of course, in other embodiments, other winding operation steps can also be used as long as the winding core can be formed, which is not limited here.

[0110] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the disclosure.

[0111] The above-described embodiments only express several embodiments of the disclosure, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the disclosure, a number of modifications and improvements can be made, which are within the scope of the disclosure. Therefore, the protection scope of the patent of the disclosure should be subject to the appended claims.

Claims

1. A reel pin mechanism characterized by, The winding needle comprises a controllable rotating winding needle, an outer circumferential surface for winding a material tape, and a clearance on the outer circumferential surface for the upstream cut end of the material tape after being cut to enter, a first side wall and a second side wall as the opposite two side walls of the clearance, a blowing part provided on the first side wall for blowing air to the second side wall to blow and press the upstream cut end of the material tape entering the clearance to the second side wall.

2. The needle roller mechanism according to claim 1, characterized in that A blowing channel is arranged in the winding needle for communicating with an external air source, and a first cover plate is arranged in the clearance, one side surface of the first cover plate facing the second side wall as the first side wall and being provided with a plurality of blowing holes as the blowing part, each of the blowing holes communicating with the blowing channel.

3. The needle roller mechanism according to claim 1, wherein An adsorption part for air suction is arranged on the second side wall for adsorbing the upstream cut end of the material tape on the second side wall by using the negative pressure generated by air suction.

4. The spool pin mechanism of claim 3, wherein, An air suction channel is arranged in the winding needle for communicating with an external negative pressure source, and a second cover plate is arranged in the clearance, one side surface of the second cover plate facing the first side wall as the second side wall and being provided with a plurality of air suction holes as the adsorption part, each of the air suction holes communicating with the air suction channel.

5. The needle roller mechanism according to claim 3, wherein The winding needle is provided with a blowing channel communicating with the blowing part and an air suction channel communicating with the adsorption part; The winding needle mechanism further comprises a connecting shaft and an air slip ring, the winding needle is mounted on the connecting shaft so that the connecting shaft can drive the winding needle to rotate, and the air slip ring is mounted on the connecting shaft, the blowing channel communicates with the external air source through the air slip ring, and the air suction channel communicates with the external negative pressure source through the air slip ring.

6. The spool pin mechanism of any one of claims 1 to 5, wherein, The clearance comprises at least two clearances, and each of the clearances is arranged at intervals along the circumference of the winding needle.

7. The spooler mechanism according to any one of claims 1 to 5, wherein The winding needle comprises a first outer needle and a second outer needle arranged opposite to each other, the first outer needle and the second outer needle form the clearance therebetween, the outer side walls of the first outer needle and the second outer needle which are away from each other jointly form the outer circumferential surface, one of the inner side walls of the first outer needle and the second outer needle which are towards each other is the first side wall, and the other is the second side wall.

8. The spool pin mechanism of claim 7, wherein, The winding needle further comprises a winding needle base, a first fixed needle and a second fixed needle, one end of each of the first fixed needle and the second fixed needle is mounted on the winding needle base, the first outer needle is arranged on the first fixed needle, and the second outer needle is arranged on the second fixed needle. The first outer needle and the second outer needle form a gap therebetween, the part of the gap on the same side of the first fixed needle and the second fixed needle is one of the clearances, and the part of the gap on the other side of the first fixed needle and the second fixed needle is the other clearance.

9. The spool pin mechanism of any one of claims 1 to 5, wherein, The winding needle comprises a first outer needle and a second outer needle arranged opposite to each other, and the outer side walls of the first outer needle and the second outer needle which are away from each other jointly form the outer circumferential surface. The first outer needle has a groove on the outer side wall thereof, which is used as the avoidance part; and / or the second outer needle has a groove on the outer side wall thereof, which is used as the avoidance part.

10. The needle roller mechanism of claim 1, wherein, When the winding needle rotates to the position where the avoidance part reaches the position of cutting the material belt, the first side wall is located downstream of the second side wall.

11. A winding apparatus characterized by comprising: The winding needle mechanism comprises the winding needle mechanism as claimed in any one of claims 1 to 10.

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