Winding device

Abstract

The present disclosure relates to a winding device. The winding device comprises: winding needle mechanisms, wherein each winding needle mechanism comprises a winding needle and a cutter, the winding needle is provided with an outer peripheral surface and an accommodating recess provided on the outer peripheral surface, the winding needle is controllably rotated to wind a material strip onto the outer peripheral surface, the cutter is disposed in the accommodating recess, the outer peripheral surface is provided with a suction region located on the upstream side of the accommodating recess, and the suction region is configured to controllably suction a passing material strip; and a material pressing mechanism, comprising a rolling assembly and a material pushing assembly, wherein the rolling assembly is used for pressing the material strip onto the corresponding outer peripheral surface, the material pushing assembly comprises a rotating portion and material pushing portions provided on the rotating portion, the rotating portion is controllably rotated so as to drive the material pushing portions to rotate to be opposite to the accommodating recess on the corresponding outer peripheral surface, the material pushing portions are used for feeding the material strip into the accommodating recess, and the cutter is used for cutting the material strip entering the accommodating recess.

Description

A winding device

[0001] This disclosure claims priority to Chinese Patent Application No. 202411518895.8, filed on October 29, 2024, entitled "A Winding Device", and to Chinese Patent Application No. 202422617592.3, also filed on October 29, 2024, entitled "A Winding Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of battery manufacturing equipment technology, specifically a winding device. Background Technology

[0003] The battery cell is an important component of a battery and can be manufactured by winding various layers of material strips (such as separator, anode plate, separator and cathode plate).

[0004] In related technologies, the layers of material strips are brought together by a film-coating mechanism before entering a winding needle at the first station for winding. After winding one cell, the winding needle at the first station switches to the second station, while another winding needle switches to the first station. At this time, the layers of material strips, brought together by the film-coating mechanism, pass through the first station, where the winding needle at the first station extends from the turret to complete the threading (i.e., the material strip enters the slit of the winding needle). Then, the inner clamping needle in the winding needle clamps the material strip, and then the cutter located between the first and second stations cuts the material strip. Then, the winding needle at the first station begins winding the next cell. In summary, the winding process in related technologies is complex, resulting in a complex structure for the winding equipment and low production efficiency. Summary of the Invention

[0005] Therefore, it is necessary to provide a winding device that can simplify the structure and improve production efficiency to address the above problems.

[0006] A winding apparatus, comprising:

[0007] A needle winding mechanism includes a needle winding and a cutter. The needle winding has an outer peripheral surface and a receiving recess formed on the outer peripheral surface. The needle winding is controllably rotatable to wind a strip onto the outer peripheral surface. The cutter is disposed within the receiving recess. The outer peripheral surface has an adsorption region located upstream of the receiving recess. The adsorption region is configured to controllably adsorb passing strip.

[0008] The pressing mechanism includes a roller pressing assembly and a pushing assembly. The roller pressing assembly is used to press the material strip against the outer peripheral surface. The pushing assembly includes a rotating part and a pushing part disposed on the rotating part. The rotating part can be rotated in a controlled manner to drive the pushing part to rotate to be opposite to the receiving recess on the outer peripheral surface. The pushing part is used to feed the material strip into the receiving recess. The cutter is used to cut the material strip that enters the receiving recess.

[0009] In some embodiments, the inside of the needle has a vacuum chamber for communication with an external negative pressure source, and the adsorption area has a plurality of adsorption holes communicating with the vacuum chamber.

[0010] In some embodiments, the inside of the winding needle is provided with multiple cavities, and each cavity and the vacuum cavity are arranged at intervals along the circumference of the winding needle. A heating element is provided on the inner wall of each cavity and the vacuum cavity near the outer peripheral surface.

[0011] In some embodiments, the heating element located in the vacuum chamber has multiple through holes, each of which is connected to a corresponding adsorption hole.

[0012] In some embodiments, the needle winding mechanism further includes an electrically integrated slip ring, the rotor of which is fixedly connected to the needle winding, and the stator of which has a first vacuum connector and a first conductive connector. The first vacuum connector is used to connect to an external negative pressure source through a gas supply line, and the first conductive connector is used to connect to an external power source through a conductive line.

[0013] The rotor of the electro-integrated slip ring has a second vacuum connector that communicates with the first vacuum connector and a second conductive connector that is electrically connected to the first conductive connector. The second vacuum connector communicates with the vacuum chamber through a vacuum tube, and the second conductive connector is electrically connected to each of the heating elements through a wire.

[0014] In some embodiments, the cutter is a hot cutter.

[0015] In some embodiments, the cutter has a mounting hole, and a heating element is inserted into the mounting hole.

[0016] In some embodiments, the rotating part is provided with two pushing parts, and the two pushing parts are arranged at intervals along the rotation direction of the rotating part so that a gap is formed between the two pushing parts;

[0017] When the two pusher sections feed the passing material strip into the receiving recess, the gap is used to receive the cutter.

[0018] In some embodiments, the pusher assembly further includes a fixed seat, a mounting seat, and a first elastic member. The mounting seat is disposed on the fixed seat and is controllably positioned relative to the fixed seat to move closer to or further away from the winding needle. The first elastic member abuts between the fixed seat and the mounting seat to provide a preload force that causes the mounting seat to tend to move closer to the winding needle. The rotating part is disposed on the mounting seat and is controllably rotatable relative to the mounting seat.

[0019] In some embodiments, the rolling assembly includes a first rolling assembly having a first pressure roller rotatable about its own axis, the first rolling assembly controllably driving the first pressure roller to press a portion of the strip upstream of the cutter against the adsorption area.

[0020] In some embodiments, the roll forming assembly further includes a second roll forming assembly having a second pressure roller rotatable about its own axis, the second roll forming assembly controllably driving the second pressure roller to press a portion of the strip downstream of the cutter against the outer peripheral surface.

[0021] In actual use, the aforementioned winding equipment conveys the strip downstream at a certain speed, passing through the first station. At the first station, the winding needle rotates around its own axis, and the roller pressing assembly presses the strip against the outer circumferential surface of the winding needle, causing the adsorption area of ​​the winding needle to adsorb and fix the strip. Simultaneously, the rotating part drives the pushing part to rotate. When the rotating part drives the pushing part to face the receiving recess, the pushing part pushes the passing strip into the receiving recess, causing the strip inside the receiving recess to be cut by the cutter. At this point, the upstream cut end of the strip, formed after being cut, is adsorbed and fixed on the outer circumferential surface of the winding needle by the adsorption area. The winding needle continues to rotate around its own axis, thereby winding the strip onto the outer circumferential surface of the winding needle to form a core. In other words, during the process of the roller pressing assembly pressing the strip against the outer circumferential surface of the needle and the pusher pushing the strip into the receiving recess of the needle, the needle always rotates around its own axis, the strip continues to be conveyed downstream, the rotating part keeps rotating to drive the pusher to rotate, and the pusher and the cutter work together to cut the strip.

[0022] Thus, while the material strip continues to be conveyed downstream, the rotation of the winding needle and the rotating part drives the pushing part and the receiving recess on the winding needle to face each other. At this time, the pushing part pushes the material strip that is passing by into the receiving recess on the winding needle, so that the cutter in the receiving recess cuts the material strip, thereby realizing the flying cut of the material strip. The upstream cut end of the material strip after being cut is attracted and fixed by the adsorption area on the winding needle, so that material strip A is wound onto the outer circumference of the winding needle to form a core. During this process, the material strip continues to be conveyed downstream, and the winding needle continues to rotate. There is no need to stop the material strip conveying or the winding needle rotation. On the one hand, it saves the waiting time for starting and stopping the equipment, which greatly improves the production efficiency; on the other hand, it eliminates the need for needle threading and film winding, which greatly simplifies the structure of the winding equipment. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the structure of a winding device according to an embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of the pressing mechanism and the winding mechanism of the winding equipment shown in Figure 1;

[0025] Figure 3 is a cross-sectional view of the needle winding mechanism of the winding device shown in Figure 1;

[0026] Figure 4 is a side view of the needle winding mechanism of the winding device shown in Figure 1;

[0027] Figure 5 is a schematic diagram of the rotating part and the pushing part of the pressing mechanism shown in Figure 2;

[0028] Figure 6 is a schematic diagram of the pressing mechanism of the winding equipment shown in Figure 1. Detailed Implementation

[0029] To make the above-described objects, features, and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this disclosure. However, this disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this disclosure. Therefore, this disclosure is not limited to the specific embodiments disclosed below.

[0030] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Referring to Figures 1 to 3, this disclosure provides a winding apparatus, including a needle winding mechanism 10 and a pressing mechanism 20. The needle winding mechanism 10 includes a needle 11 and a cutter 12. The needle 11 has an outer peripheral surface 110 (see Figure 3) and a receiving recess 111 (see Figure 3) formed on the outer peripheral surface 110. The needle 11 can be controlled to rotate to wind a strip A onto the outer peripheral surface 110 of the needle 11. The cutter 12 is disposed within the receiving recess 111 of the needle 11, such that the cutter 12 rotates synchronously with the needle 11. The outer peripheral surface 110 of the needle 11 has an adsorption region 1101 located upstream of the receiving recess 111 and configured to controllably adsorb and fix the passing strip A. The pressing mechanism 20 includes a roller pressing assembly 21 and a pusher assembly 22. The roller pressing assembly 21 is used to press the strip A against the outer peripheral surface 110 of the winding needle 11. The pushing assembly 22 includes a rotating part 221 and a pushing part 222 disposed on the rotating part 221. The rotating part 221 can be rotated in a controlled manner to drive the pushing part 222 to rotate so as to be opposite to the receiving recess 111 on the outer peripheral surface 110 of the winding needle 11 located at the first station a1. The pushing part 222 is used to feed the strip A into the receiving recess 111, so that the cutter 12 cuts the strip A that has entered the receiving recess 111.

[0036] In actual use, the winding equipment described above conveys the strip A downstream at a certain speed and passes through the first station a1. At the first station a1, the winding needle 11 rotates around its own axis, and the roller pressing assembly 21 presses the strip A against the outer peripheral surface 110 of the winding needle 11, so that the adsorption area 1101 of the winding needle 11 adsorbs and fixes the strip A. At the same time, the rotating part 221 drives the pushing part 222 to rotate. When the rotating part 221 drives the pushing part 222 to face the receiving recess 111, the pushing part 222 pushes the passing strip A into the receiving recess 111, so that the strip A entering the receiving recess 111 is cut by the cutter 12. At this time, the upstream cut end formed after the strip A is cut is adsorbed and fixed on the outer peripheral surface 110 of the winding needle 11 by the adsorption area 1101. The winding needle 11 continues to rotate around its own axis, thereby winding the strip A onto the outer peripheral surface 110 of the winding needle 11 to form the core 100. In other words, during the process of the roller pressing assembly 21 pressing the strip A against the outer peripheral surface 110 of the winding needle 11 and the pushing part 222 pushing the passing strip A into the receiving recess 111 of the winding needle 11, the winding needle 11 always rotates around its own axis, the strip A is also conveyed downstream, the rotating part 221 keeps rotating to drive the pushing part 222 to rotate, and the passing strip A is cut by the cooperation of the pushing part 222 and the cutter 12.

[0037] Thus, while the material strip A continues to be conveyed downstream, the rotation of the winding needle 11 and the rotating part 221 drives the pushing part 222 and the receiving recess 111 on the winding needle 11 to face each other. At this time, the pushing part 222 pushes the passing material strip A into the receiving recess 111 on the winding needle 11, so that the cutter 12 in the receiving recess 111 cuts the material strip A, thereby realizing the flying cut of the material strip A. The upstream cut end formed after the material strip A is cut is attracted and fixed by the adsorption area 1101 on the winding needle 11, so that the material strip A is wound onto the outer peripheral surface 110 of the winding needle 11 to form the core 100. During this process, the material strip A continues to be conveyed downstream, and the winding needle 11 continues to rotate. There is no need to stop the conveying of the material strip A or the rotation of the winding needle 11. On the one hand, it saves the waiting time for starting and stopping the equipment, which greatly improves the production efficiency; on the other hand, it eliminates the actions of needle threading and film wrapping, which greatly simplifies the structure of the winding equipment.

[0038] It should be noted that in the relevant technology, the cutter is set outside the winding needle. In order to achieve the flying cut of the material strip A, the rotating shaft is needed to drive the cutter to rotate. On the one hand, this will make the winding equipment structure more complex. On the other hand, if the speed of the cutter and the winding needle are not matched, the cutter may directly contact the winding needle and damage it. Therefore, the speed of the cutter and the winding needle needs to be precisely controlled, which requires high precision and is difficult to control.

[0039] In this disclosure, by placing the cutter 12 within the receiving recess 111 on the winding needle 11, it is ensured that the cutter 12 rotates together with the winding needle 11. On the one hand, the installation structure of the cutter 12 is simple, and the drive mechanism for driving the cutter 12 to rotate and move is omitted, which is beneficial to further simplify the structure of the winding equipment. On the other hand, the cutter 12 always rotates together with the winding needle 11, avoiding the phenomenon that the cutter 12 damages the winding needle 11 due to the mismatch between the rotation speeds of the cutter 12 and the winding needle 11.

[0040] Understandably, after the cutter 12 cuts the passing material strip A, the cut surface of material strip A forms an upstream cut end and a downstream cut end. The downstream cut end separates from the upstream cut end as the downstream material strip A is conveyed downstream. Under the adsorption effect of the adsorption area 1101 on the winding needle 11, the upstream cut end is adsorbed and fixed on the outer peripheral surface 110 of the winding needle 11, allowing the winding needle 11 to wind the material strip A. In this text, upstream and downstream are relative to the conveying direction of material strip A; that is, during the downstream conveying process of material strip A, the position that material strip A reaches first is upstream, and the position that it reaches later is downstream.

[0041] In a specific embodiment, the outer peripheral surface 110 of the coiling needle 11 is recessed inward to form a groove, which serves as the aforementioned receiving recess 111. The depth dimension of the receiving recess 111 is greater than the dimension of the cutter 12 in the depth direction of the receiving recess 111, thereby preventing the cutter 12 from extending out of the receiving recess 111 and coming into contact with other components, causing damage.

[0042] In the embodiments of this disclosure, the winding needle 11 has a vacuum chamber B inside, which is used to communicate with an external negative pressure source. The adsorption area 1101 on the outer peripheral surface 110 of the winding needle 11 has multiple adsorption holes 1102 communicating with the vacuum chamber B. Thus, the external negative pressure source evacuates the vacuum chamber B, thereby generating negative pressure at each adsorption hole 1102, and using this negative pressure to adsorb and fix the passing material strip A onto the adsorption area 1101 on the outer peripheral surface 110. When it is necessary to release the adsorption of the material strip A, the external negative pressure source stops evacuating the vacuum chamber B, causing the vacuum in the vacuum chamber B to break, and the negative pressure at each adsorption hole 1102 to disappear, thereby releasing the adsorption and fixation of the material strip A.

[0043] It should be noted that, compared with the related technology which uses a clamping mechanism inside the coil needle 11 to clamp and fix the upstream cut end of the strip A onto the coil needle 11, this disclosure uses vacuum adsorption to adsorb and fix the upstream cut end of the strip A onto the outer peripheral surface 110 of the coil needle 11, which greatly simplifies the structure of the coil needle 11 and provides a rapid, accurate and reliable adsorption response to the upstream cut end of the strip A.

[0044] In a specific embodiment, the winding needle 11 is further provided with multiple cavities C, which are spaced apart from the aforementioned vacuum chamber B along the circumference of the winding needle 11. Each cavity C and vacuum chamber B is provided with a heating element 115 on the inner wall near the outer peripheral surface 110, thereby heating the outer peripheral surface 110 of the winding needle 11 and the core 100 wound on the outer peripheral surface 110 of the winding needle 11. This softens the layers A of the core 100 and increases its adhesion, thereby improving the adhesion between the layers A of the core 100. This helps to reduce the risk of voids appearing inside the core 100 when the core 100 is subsequently hot-pressed or cold-pressed.

[0045] Furthermore, the heating element 115 located in the vacuum chamber B has multiple through holes 1151, each of which is connected to a corresponding adsorption hole 1102. This allows each adsorption hole 1102 to be connected to the vacuum chamber B through its corresponding through hole 1151, thus preventing the heating element 115 from blocking each adsorption hole 1102 and thus preventing the material belt A from being adsorbed.

[0046] Referring to Figures 3 and 4, in a specific embodiment, the needle winding mechanism 10 further includes an electrically integrated slip ring 13. The rotor 132 of the electrically integrated slip ring 13 is fixedly connected to the needle winding 11, enabling the rotor 132 of the electrically integrated slip ring 13 to rotate synchronously with the needle winding 11. The stator 131 of the electrically integrated slip ring 13 has a first vacuum connector b1 and a first conductive connector c1. The first vacuum connector b1 is used to connect to an external negative pressure source through a gas supply line, and the first conductive connector c1 is used to connect to an external power source through a conductive line. The rotor 132 of the electrically integrated slip ring 13 has a second vacuum connector b2 connected to the first vacuum connector b1 and a second conductive connector c2 electrically connected to the first conductive connector c1. The second vacuum connector b2 is connected to the vacuum chamber B through a vacuum tube, and the second conductive connector c2 is electrically connected to each heating element 115 through a wire. Thus, the external negative pressure source is connected to the vacuum chamber B in sequence through the first vacuum connector b1, the stator 131 of the integrated electro-slip ring 13, the rotor 132 of the integrated electro-slip ring 13, and the second vacuum connector b2, enabling the external negative pressure source to evacuate the vacuum chamber B. The external power supply is electrically connected to each heating element 115 in sequence through the first conductive connector c1, the stator 131 of the integrated electro-slip ring 13, the rotor 132 of the integrated electro-slip ring 13, and the second conductive connector c2, enabling the external power supply to provide electrical energy to each heating element 115.

[0047] In the embodiments of this disclosure, the needle coil 11 includes a needle coil shaft 112 and a first outer needle 113 and a second outer needle 114 disposed on the needle coil shaft 112. The first outer needle 113 and the second outer needle 114 are arranged opposite to each other, and their outer sidewalls facing away from each other are joined together to form the aforementioned outer peripheral surface 110. A groove is formed on the outer sidewall of the first outer needle 113 facing away from the second outer needle 114, and this groove serves as the aforementioned receiving recess 111. Thus, by forming a receiving recess 111 for receiving the cutter 12 by creating a groove on the outer sidewall of the first outer needle 113 facing away from the second outer needle 114, the structure of the needle coil 11 is greatly simplified.

[0048] Furthermore, each adsorption hole 1102 is formed on the outer wall of the first outer needle 113 opposite to the second outer needle 114, and each adsorption hole 1102 is located upstream of the receiving recess 111. The aforementioned vacuum cavity B is located inside the first outer needle 113 to facilitate communication with each adsorption hole 1102. One or more cavities C are formed inside both the first outer needle 113 and the second outer needle 114 to facilitate the placement of heating elements 115 in each cavity C, thereby using each heating element 115 to collectively heat the outer walls (i.e., the aforementioned outer peripheral surface 110) of the first outer needle 113 and the second outer needle 114 that are opposite to each other.

[0049] Optionally, the first outer needle 113 and the second outer needle 114 are configured to move closer to or further away from each other relative to the coiling shaft 112 in a controllable manner, thereby adjusting the radial dimension of the outer peripheral surface 110 of the coiling needle 11. Further, a gap D is formed between the first outer needle 113 and the second outer needle 114, which is used for inserting a clamping needle to grip the coiling core 100 wound on the outer peripheral surface 110. Thus, when winding is required, the first outer needle 113 and the second outer needle 114 are controlled to move away from each other, thereby increasing the radial dimension of the outer peripheral surface 110; when the core 100 is wound and needs to be unloaded, the clamping needle is inserted into the gap D between the first outer needle 113 and the second outer needle 114 and clamps the core 100; then the first outer needle 113 and the second outer needle 114 are controlled to move closer to each other, thereby reducing the radial dimension of the outer peripheral surface 110, so that the first outer needle 113 and the second outer needle 114 are in a relaxed state with the core 100; then the winding needle 11 is controlled to move axially to be pulled out from the core 100, thereby realizing the unloading of the core 100.

[0050] It should be noted that the assembly structure between the first outer needle 113 and the second outer needle 114 and the winding shaft 112 can adopt relatively mature related technologies, as long as the first outer needle 113 and the second outer needle 114 can be brought closer to or further away from each other relative to the winding shaft 112, and no special limitations are made here.

[0051] It should also be noted that the aforementioned receiving recess 111 is not limited to being formed on the first outer needle 113. In other embodiments, the receiving recess 111 may also be formed on the second outer needle 114. Of course, in some other embodiments, the receiving recess 111 may be formed on both the first outer needle 113 and the second outer needle 114. No special limitation is made here.

[0052] Specifically, in the embodiment, the cutter 12 can be a hot cutter 12. On the one hand, it can ensure that the passing material strip A can be cut off. On the other hand, in actual use, the material strip A passing through the hot cutter 12 is two layers. After the two layers of material strip A are cut by the hot cutter 12, the upstream cut ends of the two layers of material strip A are bonded together due to heat. This allows the upstream cut ends of the two layers of material strip A to be better adsorbed and fixed by the adsorption area 1101, avoiding the phenomenon that only one layer of material strip A is adsorbed and fixed while the other layer of material strip A is not adsorbed and fixed.

[0053] Optionally, the cutter 12 has a mounting hole (not shown in the figure), through which a heating element 121 is inserted, so that the cutting element 12 is heated by the heating element 121, thereby causing the cutting element 12 to perform hot cutting on the passing material strip A.

[0054] Furthermore, the cutter 12 extends longitudinally along the axial direction of the coil needle 11, and the length of the cutter 12 is greater than the width of the strip A, thereby ensuring that the cutter 12 can cut the strip A along its width direction. The mounting hole on the cutter 12 extends longitudinally, and the heating element 121 is a long strip-shaped heating rod inserted into the mounting hole, so that the heating rod can heat the cutter 12 more evenly at various positions along its length, avoiding the phenomenon of excessively high or low local temperature of the cutter 12.

[0055] Optionally, the cutter 12 includes a cutter holder 123 and a cutting edge 125 fixedly connected to the cutter holder 123. The cutter holder 123 is fixedly connected to the aforementioned receiving recess 111, and the cutting edge 125 is located on the side of the cutter holder 123 facing the opening of the receiving recess 111. The aforementioned mounting hole is formed on the cutter holder 123, and the heating element 121 passes through the mounting hole on the cutter holder 123. The heat generated by the heating element 121 is transferred to the cutting edge 125 through the cutter holder 123, causing the cutting edge 125 to thermally cut the material strip A that has entered the receiving recess 111. It should be noted that the heating element 121 can also be electrically connected to an external power source through the aforementioned electrically integrated slip ring 13. Specifically, the second conductive connector c2 is electrically connected to the heating element 121 via a wire, thereby enabling an external power source to be electrically connected to the heating element 121 via the first conductive connector c1, the stator 131 of the electro-integrated slip ring 13, the rotor 132 of the electro-integrated slip ring 13, and the second conductive connector c2, thereby enabling the external power source to provide electrical energy to the heating element 121.

[0056] Please refer to Figure 5. In this embodiment of the present disclosure, the rotating part 221 is provided with two pushing parts 222. The two pushing parts 222 are arranged at intervals along the rotation direction of the rotating part 221 so that a gap B is formed between the two pushing parts 222. When the two pushing parts 222 feed the passing material strip A into the receiving recess 111, the gap B between the two pushing parts 222 is used to receive the cutter 12, so as to avoid collision between the cutter 12 and the pushing parts 222.

[0057] Referring to Figures 1 and 6, in a specific embodiment, the feeding assembly 22 further includes a fixed base 223, a mounting base 224, and a first elastic member 225. The mounting base 224 is disposed on the fixed base 223 and can be controllably moved closer to or further away from the coiling needle 11 located at the first work station a1 relative to the fixed base 223. The first elastic member 225 abuts between the fixed base 223 and the mounting base 224 to provide a preload force that causes the mounting base 224 to have a tendency to move closer to the coiling needle 11 located at the first work station a1. A rotating part 221 is disposed on the mounting base 224 and can be controllably rotated relative to the mounting base 224.

[0058] Thus, in actual use, the control unit 221 rotates relative to the mounting base 224, thereby driving the pusher unit 222 to rotate. Simultaneously, the control unit 224 moves relative to the fixed base 223 closer to the winding needle 11 located at the first work station a1, thereby driving the rotating unit 221 and the pusher unit 222 on the rotating unit 221 to move closer to the winding needle 11 located at the first work station a1. Under the combined action of the rotating unit 221 driving the pusher unit 222 to rotate and the winding needle 11 located at the first work station a1 rotating around its own axis, the pusher unit 222 and the receiving recess 111 on the winding needle 11 face each other. Then, driven by the mounting base 224, the pusher unit 222 pushes the passing material strip A into the receiving recess 111, so that the cutter 12 in the receiving recess 111 cuts the material strip A, thus achieving a flying cut of the material strip A. After the material strip A is cut, the control mounting base 224 moves relative to the fixed base 223 in a direction away from the winding needle 11 located at the first station a1, thereby driving the rotating part 221 and the pushing part 222 on the rotating part 221 to gradually move away from the winding needle 11 located at the first station a1.

[0059] It should be noted that when the equipment malfunctions, causing a mismatch between the rotation speed of the rotating part 221 and the winding needle 11 located at the first station a1, the pushing part 222 will directly abut against the outer peripheral surface 110 of the winding needle 11. Due to the presence of the first elastic element 225, the first elastic element 225 can buffer the impact force between the pushing part 222 and the outer peripheral surface 110 of the winding needle 11 through its own deformation, preventing the pushing part 222 from causing a hard impact on the winding needle 11 and damaging it. Optionally, the first elastic element 225 can be a spring.

[0060] It should be noted that the mounting base 224 can be mounted on the fixed base 223 via a guide structure such as a guide rail or guide rod. This guide structure guides the movement of the mounting base 224 relative to the fixed base 223, ensuring more stable and reliable movement of the rotating part 221 and the pusher part 222 on the rotating part 221 towards or away from the winding needle 11 located at the first station a1. This guide structure can employ relatively mature related technologies, as long as it serves a guiding function; no special limitations are imposed here.

[0061] Furthermore, the feeding assembly 22 also includes a first driving member 227, which is drivenly connected to the mounting base 224, enabling the first driving member 227 to drive the mounting base 224 to move closer to or further away from the coiling needle 11 located at the first work station a1 relative to the fixed base 223. It should be noted that the first driving member 227 can be a linear drive module, as long as it can provide power for the movement of the mounting base 224 relative to the fixed base 223, and is not limited here.

[0062] Furthermore, the feeding assembly 22 also includes a second driving member 226, which is mounted on the mounting base 224 and drivenly connected to the rotating part 221, so that the second driving member 226 can drive the rotating part 221 to rotate relative to the mounting base 224. It should be noted that the second driving member 226 can be a rotary driving member such as a motor, as long as it can provide power for the rotation of the rotating part 221 relative to the mounting base 224, and is not limited here.

[0063] It should be noted that in some embodiments, the rotating part 221 may be a rotating roller, which is mounted on the mounting base 224 by bearings, so that the rotating roller can rotate relative to the mounting base 224 about its own axis. The pushing part 222 may be a protrusion on the roller surface of the rotating roller. Since the pushing part 222 protrudes from the roller surface of the rotating roller, when the rotating roller approaches the winding needle 11, the pushing part 222 can push the passing material strip A into the receiving recess 111 on the winding needle 11.

[0064] In embodiments of this disclosure, the roller pressing assembly 21 includes a first roller pressing assembly 21a and a second roller pressing assembly 21b. The first roller pressing assembly 21a has a first pressure roller 211a rotatable about its own axis, and the first roller pressing assembly 21a can controllably drive the first pressure roller 211a to press the portion of the material strip A located upstream of the cutter 12 against the adsorption area 1101 of the winding needle 11 located at the first station a1. The second roller pressing assembly 21b has a second pressure roller 211b rotatable about its own axis, and the second roller pressing assembly 21b can controllably drive the second pressure roller 211b to press the portion of the material strip A located downstream of the cutter 12 against the outer peripheral surface 110 of the winding needle 11 located at the first station a1. Thus, before the cutter 12 cuts the strip A, the strip A passing upstream and downstream of the cutter 12 is pressed against the outer peripheral surface 110 of the coiling needle 11 located at the first station a1, thereby ensuring that the cutter 12 can accurately cut the passing strip A, which is beneficial to improving the cutting quality.

[0065] It should be noted that, since the first roller pressing assembly 21a drives the first pressure roller 211a to press the portion of the material strip A located upstream of the cutter 12 against the adsorption area 1101 of the winding needle 11, after the material strip A is cut by the cutter 12, the upstream cut end of the material strip A is adsorbed and fixed on the adsorption area 1101 of the winding needle 11, ensuring that the winding needle 11 can wind the material strip A onto the outer peripheral surface 110 to form the core 100.

[0066] It is understandable that, since the first pressure roller 211a of the first roller pressing assembly 21a and the second pressure roller 211b of the second roller pressing assembly 21b are both rotatable around their own axes, when the first pressure roller 211a and the second pressure roller 211b press the material strip A against the winding needle 11 located at the first station a1, the material strip A can pass through the space between the first pressure roller 211a and the winding needle 11 located at the first station a1 and the space between the second pressure roller 211b and the winding needle 11 located at the first station a1 under the traction action of the downstream, and be conveyed downstream. In other words, during the process of cutting the passing material strip A using the cutter 12, the coil needle 11 rotates around its own axis and drives the cutter 12 to rotate together. The rotating part 221 drives the pushing part 222 to rotate, and the material strip A between the pushing part 222 and the coil needle 11 is also conveyed downstream. The rotation speed of the rotating part 221, the rotation speed of the coil needle 11, and the conveying speed of the material strip A downstream are matched to ensure that the pushing part 222 feeds the material strip A into the receiving recess 111 and the speed of the three is consistent at the moment when the cutting part 12 cuts it. This allows the pushing part 222 to accurately feed the material strip A into the receiving recess 111, and the cutting part 12 to accurately and quickly cut the material strip A.

[0067] It should be noted that in some embodiments, the first roller pressing assembly 21a is mounted on the mounting base 224, such that when the first driving member 227 drives the mounting base 224 to move closer to or away from the winding needle 11 located at the first station a1, the mounting base 224 can drive the pushing assembly 22 and the first roller pressing assembly 21a to move closer to or away from the winding needle 11 located at the first station a1 together. That is to say, the first roller pressing assembly 21a and the pushing assembly 22 share the same driving member, eliminating the need for an additional driving member for the first roller pressing assembly 21a, greatly simplifying the equipment structure, reducing the space required, and reducing the spatial layout difficulty of the components of the pressing mechanism 20.

[0068] Specifically, in this embodiment, the first roller pressing assembly 21a includes a first mounting frame 212a and a second elastic member 213a. The first mounting frame 212a is movably connected to the mounting base 224 via a first guide rod, and the first pressure roller 211a is rotatably connected to the first mounting frame 212a. The second elastic member 213a abuts between the mounting base 224 and the first mounting frame 212a to provide a spring force that causes the first mounting frame 212a to have a tendency to move relative to the mounting base 224 toward the winding needle 11 located at the first work station a1. Thus, as the first driving member 227 drives the mounting base 224 toward the winding needle 11 located at the first work station a1, the first pressure roller 211a first presses the passing material strip A against the adsorption area 1101 of the winding needle 11 located at the first work station a1. As the mounting base 224 continues to move toward the winding needle 11, the mounting base 224 then drives the pushing part 222 to push the passing material strip A into the receiving recess 111. Alternatively, the second elastic element 213a may be a compression spring.

[0069] In actual use, when the first driving component 227 drives the mounting base 224 to approach the winding needle 11 located at the first work station a1, the first roller pressing assembly 21a and the rotating part 221 approach the winding needle 11 located at the first work station a1 together. The first pressure roller 211a of the first roller pressing assembly 21a first presses the passing material strip A against the winding needle 11 located at the first work station a1, and the pushing part 222 on the rotating part 221 then pushes the passing material strip A into the receiving recess 111 of the winding needle 11 and cuts it by the cutter 12. Then, the first driving member 227 drives the mounting base 224 away from the winding needle 11 located at the first station a1. Driven by the mounting base 224, the pushing part 222 first exits the receiving recess 111 of the winding needle 11. Then, the first pressure roller 211a of the first roller pressing assembly 21a separates from the winding needle 11 located at the first station a1, that is, the first pressure roller 211a releases its pressure on the passing material strip A (at this time, the upstream cut end of the material strip A is adsorbed and fixed on the adsorption area 1101 of the winding needle 11). At the same time, as the winding needle 11 located at the first station a1 continues to rotate, the material strip A is wound onto the outer peripheral surface 110 of the winding needle 11.

[0070] Of course, in other embodiments, the first roller pressing assembly 21a may not be mounted on the mounting base 224. Instead, a driving member may be provided to drive the first roller pressing assembly 21a to move closer to or away from the winding needle 11 located at the first station a1. This is not limited here.

[0071] It should be noted that in some embodiments, the second roller pressing assembly 21b is also mounted on the mounting base 224, so that when the first driving member 227 drives the mounting base 224 to approach or move away from the winding needle 11 located at the first station a1, the mounting base 224 can drive the pushing assembly 22 and the second roller pressing assembly 21b to approach or move away from the winding needle 11 located at the first station a1 together. That is to say, the second roller pressing assembly 21b and the pushing assembly 22 share the same driving member, eliminating the need to configure an additional driving member for the second roller pressing assembly 21b, which greatly simplifies the equipment structure, reduces the space required, and reduces the spatial layout difficulty of the components of the pressing mechanism 20.

[0072] Specifically, in this embodiment, the second roller pressing assembly 21b includes a second mounting bracket 212b and a third elastic member 213b. The second mounting bracket 212b is movably connected to the mounting base 224 via a second guide rod, and the second pressure roller 211b is rotatably connected to the second mounting bracket 212b. The third elastic member 213b abuts between the mounting base 224 and the second mounting bracket 212b to provide a spring force that causes the second mounting bracket 212b to have a tendency to move relative to the mounting base 224 toward the winding needle 11 located at the first station a1. Thus, as the first driving member 227 drives the mounting base 224 to approach the winding needle 11 located at the first work station a1, the second pressure roller 211b first presses the passing material strip A against the outer peripheral surface 110 of the winding needle 11 located at the first work station a1. As the mounting base 224 continues to approach the winding needle 11, the mounting base 224 then drives the pushing part 222 to push the passing material strip A into the receiving recess 111 of the winding needle 11, so that the material strip A is cut by the cutter 12 in the receiving recess 111. Optionally, the third elastic member 213b can be a compression spring.

[0073] In actual use, when the first driving component 227 drives the mounting base 224 to approach the winding needle 11 located at the first station a1, the second roller pressing component 21b and the pushing part 222 approach the winding needle 11 located at the first station a1 together. The second pressure roller 211b of the second roller pressing component 21b first presses the passing material strip A against the outer peripheral surface 110 of the winding needle 11 located at the first station a1. The mounting base 224 then drives the pushing part 222 to push the passing material strip A into the receiving recess 111 of the winding needle 11, so that the material strip A is cut by the cutter 12 in the receiving recess 111. After the material strip A is cut, the first drive member 227 drives the mounting base 224 away from the winding needle 11 located at the first station a1. Under the drive of the mounting base 224, the push part 222 first exits the receiving recess 111, and then the second pressure roller 211b of the second roller pressing assembly 21b separates from the winding needle 11 located at the first station a1, that is, the second pressure roller 211b releases its pressure on the passing material strip A.

[0074] Of course, in other embodiments, the second roller pressing assembly 21b may not be mounted on the mounting base 224. Instead, a driving member may be provided to drive the second roller pressing assembly 21b to move closer to or away from the winding needle 11 located at the first station a1. This is not limited here.

[0075] Referring to Figure 1, in this embodiment of the present disclosure, the winding device further includes a turret 30, and the number of needle winding mechanisms 10 is at least two. The turret 30 is rotatably configured, and the needles 11 of each needle winding mechanism 10 are rotatably connected to the turret 30 via needle winding shafts 112. As the turret 30 rotates, the needles 11 of each needle winding mechanism 10 sequentially pass through a first station a1 and a second station a2. When the needle 11 located at the first station a1 rotates with the turret 30 to the second station a2, the other needle 11 rotates with the turret 30 back to the first station a1.

[0076] Thus, when the core 100 on the winding needle 11 at the first station a1 is wound, the material strip A continues to be conveyed downstream. The turret 30 drives the winding needle 11 at the first station a1 to rotate to the second station a2, and another winding needle 11 rotates with the turret 30 to the first station a1. At this time, the winding needle 11 at the first station a1 rotates around its own axis, and at the same time, the first roller pressing assembly 21a drives the first pressure roller 211a to press the part of the material strip A upstream of the cutter 12 onto the adsorption area 1101 of the winding needle 11 at the first station a1. The second roller pressing assembly 21b drives the second pressure roller 211b to press the part of the material strip A downstream of the cutter 12 onto the outer peripheral surface 110 of the winding needle 11 at the first station a1. The rotating part 221 moves closer to the winding needle 11 located at the first station a1. At the same time, the rotating part 221 drives the pushing part 222 on it to rotate. The winding needle 11 located at the first station a1 rotates, so that when the pushing part 222 on the rotating part 221 and the receiving recess 111 on the winding needle 11 are opposite to each other, the pushing part 222 pushes the passing material strip A into the receiving recess 111, thereby causing the cutter 12 in the receiving recess 111 to cut the material strip A. At this time, the upstream cut end of the material strip A is attracted and fixed on the attraction area 1101 of the winding needle 11 located at the first station a1.

[0077] After the strip A is cut by the cutter 12, under the driving action of the first drive member 227, the rotating part 221 gradually moves away from the winding needle 11 located at the first station a1, causing the pushing part 222 on the rotating part 221 to exit the receiving recess 111 on the winding needle 11. Then, the first roller pressing assembly 21a drives the first pressure roller 211a to leave the winding needle 11 located at the first station a1. Then, after the winding needle 11 located at the first station a1 has wound the strip A onto its outer peripheral surface 110 at least one turn, the second roller pressing assembly 21b drives its second pressure roller 211b to leave the winding needle 11 located at the first station a1. During this process, the winding needle 11 located at the first station a1 continues to rotate to wind the strip A onto its outer peripheral surface 110 to form the core 100.

[0078] After the material strip A is cut by the cutter 12, the winding needle 11 located at the second station a2 continues to wind until the cut material strip A is completely wound onto its outer peripheral surface 110. Then, the core 100 on the winding needle 11 located at the second station a2 is subjected to finishing adhesive and / or unloading.

[0079] It should be noted that, in some embodiments, the winding needles 11 of each winding needle mechanism 10 may also pass through a third station a3 during the rotation of the turret 30. That is, the winding needles 11 of each winding needle mechanism 10 pass through the first station a1, the second station a2, and the third station a3 in sequence during the rotation of the turret 30. At the first station a1, the winding needle 11 winds the upstream conveyed material belt A to form a core 100. At the second station a2, the winding needle 11 applies finishing adhesive to the core 100 on the winding needle 11 to prevent the core 100 on the winding needle 11 from becoming loose. At the third station a3, the winding needle 11 unloads the core 100 on the winding needle 11. In the embodiment where the winding needle 11 passes through three stations (i.e., the first station a1, the second station a2, and the third station a3), the winding operation steps of the winding equipment are similar to those in the embodiment where the winding needle 11 passes through two stations (i.e., the first station a1 and the second station a2), so they will not be described in detail here.

[0080] It should be noted that the winding operation steps described above are only one embodiment. Of course, other winding operation steps can also be used in other embodiments, as long as the winding and forming of the core 100 can be achieved, and no limitation is made here.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A winding device, characterized in that, include: A needle winding mechanism (10) includes a needle winding (11) and a cutter (12). The needle winding (11) has an outer peripheral surface (110) and a receiving recess (111) formed on the outer peripheral surface (110). The needle winding (11) is controllably rotatable to wind a strip (A) onto the outer peripheral surface (110). The cutter (12) is disposed within the receiving recess (111). The outer peripheral surface (110) has an adsorption region (1101) located upstream of the receiving recess (111). The adsorption region (1101) is configured to controllably adsorb the passing strip (A). The pressing mechanism (20) includes a roller pressing assembly (21) and a pushing assembly (22). The roller pressing assembly (21) is used to press the strip (A) against the outer peripheral surface (110). The pushing assembly (22) includes a rotating part (221) and a pushing part (222) disposed on the rotating part (221). The rotating part (221) can be rotated in a controlled manner to drive the pushing part (222) to rotate to be opposite to the receiving recess (111) on the outer peripheral surface (110). The pushing part (222) is used to feed the strip (A) into the receiving recess (111). The cutter (12) is used to cut the strip (A) that has entered the receiving recess (111).

2. The winding equipment according to claim 1, characterized in that, The inside of the coiling needle (11) has a vacuum chamber (B) for communicating with an external negative pressure source, and the adsorption area (1101) has a plurality of adsorption holes (1102) communicating with the vacuum chamber (B).

3. The winding equipment according to claim 2, characterized in that, The inside of the winding needle (11) is provided with a plurality of cavities (C), and each cavity (C) and the vacuum cavity (B) are arranged at intervals along the circumference of the winding needle (11). Each cavity (C) and the vacuum cavity (B) is provided with a heating element (115) near the inner wall of the outer peripheral surface (110).

4. The winding equipment according to claim 3, characterized in that, The heating element (115) located in the vacuum chamber (B) has a plurality of through holes (1151), and each of the through holes (1151) is connected to the corresponding adsorption hole (1102).

5. The winding device according to claim 3 or 4, characterized in that, The needle winding mechanism (10) further includes an electrically integrated slip ring (13), the rotor (132) of the electrically integrated slip ring (13) is fixedly connected to the needle winding (11), and the stator (131) of the electrically integrated slip ring (13) has a first vacuum connector (b1) and a first conductive connector (c1). The first vacuum connector (b1) is used to connect with an external negative pressure source through a gas supply pipeline, and the first conductive connector (c1) is used to connect with an external power source through a conductive line. The rotor (132) of the electro-integrated slip ring (13) has a second vacuum connector (b2) that communicates with the first vacuum connector (b1) and a second conductive connector (c2) that is electrically connected to the first conductive connector (c1). The second vacuum connector (b2) is connected to the vacuum chamber (B) through a vacuum tube, and the second conductive connector (c2) is electrically connected to each of the heating elements (115) through a wire.

6. The winding apparatus according to any one of claims 1 to 5, characterized in that, The cutter (12) is a hot cutter.

7. The winding device according to claim 6, characterized in that, The cutter (12) has a mounting hole, and a heating element (121) passes through the mounting hole.

8. The winding apparatus according to any one of claims 1 to 7, characterized in that, The rotating part (221) is provided with two pushing parts (222), and the two pushing parts (222) are arranged at intervals along the rotation direction of the rotating part (221) so that a gap is formed between the two pushing parts (222); When the two pusher sections (222) feed the passing material strip (A) into the receiving recess (111), the gap is used to receive the cutter (12).

9. The winding apparatus according to any one of claims 1 to 8, characterized in that, The feeding assembly (22) further includes a fixed seat (223), a mounting seat (224), and a first elastic element (225). The mounting seat (224) is disposed on the fixed seat (223) and can be controlled to move closer to or further away from the winding needle (11) relative to the fixed seat (223). The first elastic element (225) abuts between the fixed seat (223) and the mounting seat (224) to provide a preload force that causes the mounting seat (224) to have a tendency to move closer to the winding needle (11). The rotating part (221) is disposed on the mounting seat (224) and can be controlled to rotate relative to the mounting seat (224).

10. The winding apparatus according to any one of claims 1 to 9, characterized in that, The roller pressing assembly (21) includes a first roller pressing assembly (21a), which has a first pressure roller (211a) rotatable about its own axis. The first roller pressing assembly (21a) can controllably drive the first pressure roller (211a) to press the portion of the material strip (A) located upstream of the cutter (12) against the adsorption area (1101).

11. The winding apparatus according to any one of claims 1 to 10, characterized in that, The roller pressing assembly (21) further includes a second roller pressing assembly (21b), which has a second pressure roller (211b) rotatable about its own axis. The second roller pressing assembly (21b) can controllably drive the second pressure roller (211b) to press the portion of the material strip (A) downstream of the cutter (12) against the outer peripheral surface (110).

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