Winding needle device

Abstract

The utility model provides a winding needle device and relates to the technical field of battery manufacturing equipment. The winding needle device comprises an adjusting mechanism, a buffering mechanism, a driving mechanism, a fixing mechanism and a winding needle. The adjusting mechanism, the buffering mechanism and the driving mechanism are sequentially connected, the fixing mechanism is arranged on the buffering mechanism, the winding needles are arranged on the adjusting mechanism, and the driving mechanism is used for driving the buffering mechanism to linearly move, so that the buffering mechanism drives the adjusting mechanism to radially expand or contract, and the at least two winding needles are driven to move oppositely or oppositely. The fixing mechanism is used for locking the buffering mechanism. The winding needle device improves the winding quality and speed of the battery cell so as to achieve high-quality and high-efficiency winding of the battery cell; the outer diameter of the winding needle is intelligently adjusted, adjustment can be completed without shutdown, high precision and high speed of adjustment are guaranteed, and meanwhile production efficiency and the overall quality of a battery cell are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing equipment technology, and more specifically, to a needle winding device. Background Technology

[0002] In the evolution of the lithium battery industry, improving cell quality and increasing production efficiency have become the core dual objectives driving the industry. Among these, the cell winding process is considered a critical link affecting both cell quality and production efficiency. In this process, the circumference of the winding needles has a direct and significant impact on cell quality. By adjusting the circumference of the winding needles, problems such as misaligned tabs and deviations in cell dimensions can be effectively solved, thereby promoting the optimization of the overall production process.

[0003] However, traditional methods for manually adjusting the outer circumference of the coil needle have significant limitations. This process requires stopping the equipment and applying Teflon material to the outer surface of the needle. While this method partially alleviates the aforementioned problems, it significantly reduces production efficiency and limits the potential for improving adjustment accuracy. Therefore, seeking a more efficient and precise coil needle adjustment technology has become a crucial issue that urgently needs to be addressed in the lithium battery manufacturing industry. Utility Model Content

[0004] The purpose of this invention is to provide a winding needle device that can improve the quality and speed of battery cell winding, thereby achieving high quality and high efficiency in battery cell winding. By intelligently adjusting the outer diameter of the winding needle, adjustments can be completed without stopping the machine, which not only ensures high precision and high speed of adjustment, but also significantly enhances production efficiency and the overall quality of the battery cell.

[0005] The embodiments of this utility model are implemented as follows:

[0006] In a first aspect, this utility model provides a needle winding device, including an adjustment mechanism, a buffer mechanism, a driving mechanism, a fixing mechanism, and a needle winding device;

[0007] The adjusting mechanism, the buffering mechanism, and the driving mechanism are connected in sequence. The fixing mechanism is disposed on the buffering mechanism. The number of winding needles is at least two and both are disposed on the adjusting mechanism. The driving mechanism is used to drive the buffering mechanism to move linearly so that the buffering mechanism drives the adjusting mechanism to open or close radially, thereby driving at least two winding needles to move in opposite directions or towards each other. The fixing mechanism is used to lock the buffering mechanism.

[0008] In an optional embodiment, the adjustment mechanism includes two mounting shafts and two adjustment components. The two adjustment components are respectively disposed on the two mounting shafts, and the two adjustment components are used to drive at least two winding needles to move in opposite directions or towards each other under the drive of the buffer mechanism.

[0009] In an optional embodiment, the adjusting assembly includes a sliding rod and a first sliding member. The sliding rod is movably disposed on the mounting shaft, and one end of the sliding rod away from the mounting shaft is connected to the buffer mechanism. The sliding rod slides in cooperation with the first sliding member, and the first sliding member is connected to the winding needle. The sliding rod is used to drive the first sliding member to move radially when the sliding rod moves axially, so as to drive the winding needle to move radially.

[0010] In an optional embodiment, the adjustment assembly further includes a first elastic element disposed on the mounting shaft and abutting against the sliding rod.

[0011] In an optional embodiment, the adjusting mechanism further includes two pressure plate assemblies, which are respectively disposed on the two adjusting assemblies;

[0012] The pressure plate assembly includes a pressure plate, a second sliding member, and a second elastic member connected together. The sliding rod is slidably engaged with the second sliding member. The second sliding member is used to move radially when the sliding rod moves axially, so that the pressure plates of the two pressure plate assemblies move towards or away from each other to jointly press or release the diaphragm. The second elastic member is disposed between the pressure plate and the second sliding member.

[0013] In an optional embodiment, the sliding rod is provided with a plurality of pulleys, the first sliding member is provided with a first sliding groove, the second sliding member is provided with a second sliding groove, the mounting shaft is provided with a third sliding groove, and the plurality of pulleys are respectively provided in the first sliding groove, the second sliding groove and the third sliding groove. The first sliding groove is inclined and the inclination directions are opposite, and the third sliding groove extends axially.

[0014] In an optional embodiment, the buffer mechanism includes a mounting base, a connecting rod, and a third elastic element. The connecting rod is movably disposed on the mounting base, one end of the connecting rod is provided with a first end cap, and the third elastic element is disposed between the first end cap and the mounting base.

[0015] In an optional embodiment, the buffer mechanism further includes a fourth elastic element. The other end of the connecting rod away from the first end cover is sequentially provided with a second end cover, a connecting head, and an abutment. The abutment is movably disposed on the connecting head. One end of the fourth elastic element is connected to the abutment, and the other end is connected to the connecting head. The abutment is connected to the adjusting mechanism.

[0016] In an optional embodiment, the fixing mechanism includes a mounting component, a clamping component, and a fixing component connected in sequence. The fixing component is connected to the buffer mechanism, and the clamping component is used to lock the fixing component.

[0017] In an optional embodiment, the driving mechanism includes a driving mounting component, a driving component, and a top block. The driving component is disposed on the driving mounting component, the top block is disposed at the output end of the driving component, and the top block is connected to the buffer mechanism.

[0018] The beneficial effects of the winding needle device provided in this embodiment include: the driving mechanism drives the buffer mechanism to move linearly in the horizontal direction, which in turn drives the adjustment mechanism to move. Ultimately, the adjustment mechanism drives the two winding needles to move in opposite directions or towards each other, thereby adjusting the outer circumference of the two winding needles to meet the relevant dimensional requirements of the battery cell, resulting in high adjustment efficiency. The buffer mechanism buffers the driving force of the driving mechanism, thus protecting the adjustment mechanism. When the adjustment mechanism adjusts the outer circumference of the winding needles to the ideal state, the fixing mechanism locks the buffer mechanism to prevent further axial movement, thereby fixing the outer circumference of the winding needles and ensuring adjustment accuracy. Therefore, the winding needle device provided by this invention improves the quality and speed of battery cell winding, achieving high-quality and high-efficiency winding. Through intelligent adjustment of the outer diameter of the winding needles, adjustment can be completed without stopping the machine, ensuring not only high precision and high speed but also significantly enhancing production efficiency and the overall quality of the battery cell. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the first state structure of the needle winding device provided in an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the second state structure of the needle winding device provided in an embodiment of the present utility model;

[0022] Figure 3 A schematic diagram of the adjustment mechanism structure provided in this embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the coiling needle structure provided for an embodiment of this utility model;

[0024] Figure 5 Schematic diagrams of the buffer mechanism and fixing mechanism provided in the embodiments of this utility model;

[0025] Figure 6A schematic diagram of the drive mechanism structure provided for an embodiment of this utility model.

[0026] Icons: 10-Needle winding device; 100-Adjusting mechanism; 110-Mounting shaft; 111-Connecting plate; 112-Third slide groove; 120-Adjusting assembly; 121-Sliding rod; 122-First sliding member; 1221-First slide groove; 123-First elastic member; 124-Pulley; 130-Pressure plate assembly; 131-Pressure plate; 132-Second sliding member; 1321-Second slide groove; 133-Second elastic member; 200- Buffer mechanism; 210-mounting base; 220-connecting rod; 221-first end cap; 222-second end cap; 223-connector; 224-abutment; 230-third elastic element; 240-fourth elastic element; 300-drive mechanism; 310-drive element; 320-drive mounting element; 330-top block; 400-fixing mechanism; 410-mounting element; 420-clamping element; 430-fixing element; 500-coil needle. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Based on the above problems, this utility model provides a needle winding device that can be applied to winding machines and battery cell production lines.

[0034] Taking the application of the needle winding device in a winding machine as an example, the winding machine forms a battery cell by winding the positive and negative electrode sheets and the separator through the needle winding device. The winding machine also includes a winding drive component, which is used to drive the needle winding device to rotate, thereby performing the winding action of the battery cell. Since the winding machine adopts the needle winding device provided in this embodiment of the utility model, the winding machine also has the feature of being able to continuously adjust the outer circumference.

[0035] For details, please refer to Figures 1 to 6 The needle winding device 10 includes an adjustment mechanism 100, a buffer mechanism 200, a drive mechanism 300, a fixing mechanism 400, and a needle winding device 500.

[0036] The adjusting mechanism 100, the buffering mechanism 200, and the driving mechanism 300 are connected in sequence. The fixing mechanism 400 is disposed on the buffering mechanism 200. There are at least two winding needles 500, and both are disposed on the adjusting mechanism 100. The driving mechanism 300 is used to drive the buffering mechanism 200 to move linearly, so that the buffering mechanism 200 drives the adjusting mechanism 100 to open or close radially, so as to drive at least two winding needles 500 to move in opposite directions or towards each other. The fixing mechanism 400 is used to lock the buffering mechanism 200.

[0037] In this embodiment, the driving mechanism 300 drives the buffer mechanism 200 to move linearly in the horizontal direction, thereby driving the adjustment structure to move. Finally, the adjustment mechanism 100 drives the two winding needles 500 to move in opposite directions or towards each other, so as to adjust the outer perimeter of the two winding needles 500, thereby meeting the relevant size requirements of the battery cell and achieving high adjustment efficiency. The buffer mechanism 200 can buffer the driving force of the driving mechanism 300, thereby protecting the adjustment mechanism 100. When the adjustment mechanism 100 adjusts the outer perimeter of the winding needles 500 to the ideal state, the fixing mechanism 400 locks the buffer mechanism 200 to prevent the buffer mechanism 200 from continuing to move axially, thereby fixing the outer perimeter of the winding needles 500 and ensuring adjustment accuracy.

[0038] Therefore, the winding needle device 10 provided by this utility model improves the quality and speed of battery cell winding, so as to achieve high quality and high efficiency in battery cell winding; by intelligently adjusting the outer diameter of the winding needle 500, the adjustment can be completed without stopping the machine, which not only ensures high precision and high speed of adjustment, but also significantly enhances production efficiency and the overall quality of the battery cell.

[0039] Furthermore, the adjustment mechanism 100 includes two mounting shafts 110 and two adjustment components 120. The two adjustment components 120 are respectively disposed on the two mounting shafts 110. The two adjustment components 120 are used to radially open or close under the drive of the buffer mechanism 200, so as to drive at least two coiling needles 500 to move in opposite directions or towards each other.

[0040] Optionally, in this embodiment, there are two winding needles 500, each disposed on a different adjusting component 120 of the chain. Of course, in other embodiments, the number of winding needles 500 can be configured differently, and this is not specifically limited here. Furthermore, the outer peripheral walls of the two winding needles 500 are approximately cylindrical to ensure minimal tension fluctuations in the electrode and separator when the two winding needles 500 rotate to wind the battery cell, thus ensuring battery cell quality.

[0041] In this embodiment, one end of the two mounting shafts 110 is connected by a connecting plate 111. The two adjusting components 120 can drive the two winding needles 500 to move in opposite directions or towards each other under the drive of the driving mechanism 300 and the buffer mechanism 200, thereby increasing or decreasing the outer perimeter of the two winding needles 500 to adapt to the perimeter requirements of the diaphragm wound by the winding needles 500.

[0042] Furthermore, the adjustment assembly 120 includes a sliding rod 121 and a first sliding member 122. The sliding rod 121 is movably disposed on the mounting shaft 110. One end of the sliding rod 121 away from the mounting shaft 110 is connected to the buffer mechanism 200. The sliding rod 121 and the first sliding member 122 are slidably engaged. The first sliding member 122 is connected to the winding needle 500. The sliding rod 121 is used to drive the first sliding member 122 to move radially when the sliding rod 121 moves axially, so as to drive the winding needle 500 to move radially.

[0043] Furthermore, the adjustment assembly 120 also includes a first elastic element 123, which is disposed on the mounting shaft 110 and abuts against the sliding rod 121.

[0044] In this embodiment, one end of the sliding rod 121 is connected to the first elastic member 123, and the other end is connected to the buffer mechanism 200. When the buffer mechanism 200 drives the sliding rod 121 to move horizontally (to the left in the figure), it also drives the sliding rod 121 to compress the first elastic member 123. At this time, the sliding rod 121 drives the first sliding member 122 to move radially, so that the first sliding members 122 of the two adjustment components 120 move in opposite directions, thereby driving the two winding needles 500 to move in opposite directions to increase the outer circumference of the two winding needles 500.

[0045] After the driving mechanism 300 and the buffer mechanism 200 remove the force of the sliding rod 121, the elastic restoring force generated by the first elastic element 123 in the compressed state drives the sliding rod 121 to move in the opposite horizontal axis (the horizontal direction in the figure), thereby driving the sliding element and the winding needle 500 to return to the initial state.

[0046] Furthermore, the adjustment mechanism 100 also includes two pressure plate assemblies 130, which are respectively disposed on the two adjustment assemblies 120. When the drive mechanism 300 and the buffer mechanism 200 drive the sliding rod 121 to move, the sliding rod 121 also drives the two pressure plate assemblies 130 to move towards or away from each other, thereby realizing that the two pressure plate assemblies 130 press or release the diaphragm.

[0047] In detail, the pressure plate assembly 130 includes a pressure plate 131, a second sliding member 132, and a second elastic member 133 connected to each other. The sliding rod 121 is slidably engaged with the second sliding member 132. The second sliding member 132 is used to move radially when the sliding rod 121 moves axially, so that the two pressure plates 131 move towards or away from each other to jointly press or release the diaphragm.

[0048] In this embodiment, the sliding rod 121 moves axially to drive the second sliding member 132 to move radially, so that the second sliding member 132 drives the two pressure plates 131 to move towards or away from each other, so as to jointly press or release the diaphragm.

[0049] In this embodiment, the pressure plate 131 and the second sliding member 132 are connected by the second elastic member 133. In this way, when the pressure plate 131 presses the diaphragm, the second elastic member 133 is gradually compressed between the pressure plate 131 and the second sliding member 132 under the drive of the sliding rod 121, thereby gradually increasing the pressure of pressing the diaphragm. The pressure of pressing the diaphragm can be adjusted by adjusting the moving position of the second sliding member 132, thereby improving the adaptability of the needle winding device 10.

[0050] Furthermore, the sliding rod 121 is provided with a plurality of pulleys 124, the first sliding member 122 is provided with a first sliding groove 1221, the second sliding member 132 is provided with a second sliding groove 1321, and the mounting shaft 110 is provided with a third sliding groove 112. The plurality of pulleys 124 are respectively provided in the first sliding groove 1221, the second sliding groove 1321 and the third sliding groove 112. The first sliding groove 1221 is inclined and the inclination directions are opposite, and the third sliding groove 112 extends axially.

[0051] In this embodiment, by providing multiple pulleys 124 on the sliding rod 121 and an inclined first groove 1221 on the first sliding member 122, when the sliding rod 121 drives the pulleys 124 to move horizontally, the first sliding member 122 is driven to rise or fall radially, thereby driving the two winding needles 500 to move in opposite directions or towards each other, thereby adjusting the outer circumference of the two winding needles 500. Similarly, by moving the sliding rod 121 horizontally, the second sliding member 132 can be driven to rise or fall radially, thereby driving the pressure plates 131 of the two pressure plate assemblies 130 to move in opposite directions or towards each other, that is, the two pressure plates 131 jointly press or release the diaphragm.

[0052] When the sliding rod 121 moves forward (to the left in the figure) or backward (to the left in the figure) on the mounting shaft 110, it drives the first sliding members 122 on the two mounting shafts 110 to move in opposite directions or towards each other, so that the circumference of the approximately cylindrical winding needle 500 increases or decreases; and drives the second sliding members 132 on the two mounting shafts 110 to move closer to each other or move away from each other.

[0053] Furthermore, in order to ensure that the sliding rod 121 moves horizontally, a third mounting groove extending horizontally is provided on the mounting shaft 110 to ensure that the pulley 124 moves horizontally along the third sliding groove 112 under the drive of the sliding rod 121.

[0054] It should be noted that the slides on the two adjustment components 120 are symmetrically arranged.

[0055] Furthermore, the buffer mechanism 200 includes a mounting base 210, a connecting rod 220, and a third elastic element 230. The connecting rod 220 is movably disposed on the mounting base 210, and a first end cap 221 is provided at one end of the connecting rod 220. The third elastic element 230 is disposed between the first end cap 221 and the mounting base 210.

[0056] In this embodiment, the drive mechanism 300 abuts against the first end cap 221 to drive the connecting rod 220 to move horizontally axially relative to the mounting base 210, thereby compressing the third elastic member 230 to provide a buffering effect.

[0057] Furthermore, the buffer mechanism 200 also includes a fourth elastic element 240. The other end of the connecting rod 220 away from the first end cover 221 is sequentially provided with a second end cover 222, a connector 223 and an abutment 224. The abutment 224 is movably disposed on the connector 223. One end of the fourth elastic element 240 is connected to the abutment 224 and the other end is connected to the connector 223. The abutment 224 is connected to the adjustment mechanism 100.

[0058] In this embodiment, the connector 223 abuts against the sliding rod 121 of the adjustment mechanism 100, the abutment 224 is axially slidably disposed on the connector 223, and a fourth elastic member 240 is disposed between the connector 223 and the abutment 224. The abutment 224 abuts against the mounting shaft 110, compresses the fourth elastic member 240, and buffers the impact of the abutment 224 on the mounting shaft 110.

[0059] It should be noted that connector 223 rotates around connector 220.

[0060] Furthermore, the fixing mechanism 400 includes a mounting member 410, a clamping member 420, and a fixing member 430 connected in sequence. The fixing member 430 is connected to the buffer mechanism 200, and the clamping member 420 is used to lock the fixing member 430.

[0061] In this embodiment, the clamping member 420 locks the fixing member 430 and the connecting rod 220 to stabilize the circumference of the coil needle 500.

[0062] Furthermore, the drive mechanism 300 includes a drive mounting component 320, a drive component 310, and a top block 330. The drive component 310 is disposed on the drive mounting component 320, and the top block 330 is disposed on the output end of the drive component 310. The top block 330 is connected to the buffer mechanism 200.

[0063] In this embodiment, the driving member 310 is used to drive the top block 330 to extend or retract, so that the connecting rod 220 of the buffer mechanism 200 can move horizontally along the axis through the top block 330, thereby driving the adjustment mechanism 100 to move.

[0064] Optionally, the drive component 310 can be an electric cylinder, or of course, a lead screw and slide rail mechanism, etc., without specific limitations.

[0065] In practical applications, when a cell winding cycle is completed, the output end of the drive unit 310 retracts, causing the top block 330 to disengage from the first end cap 221 of the buffer mechanism 200 (as shown). Figure 2 (As shown); at this time, the clamping part 420 continues to lock the fixing part 430 and the connecting rod 220 to stabilize the circumference of the coil needle 500.

[0066] Once the battery cell tail adhesive is applied, at the unloading station, clamp 420 releases fixing member 430 and connecting rod 220; first elastic member 123 pushes sliding rod 121 forward, sliding rod 121 drives first sliding member 122 to move, and first sliding member 122 drives winding needle 500 back to the initial position, that is, pressure plate 131 releases diaphragm, winding needle 500 diameter retracts to the initial state; thus the battery cell unloading is completed.

[0067] In summary, this utility model provides a needle winding device 10. A driving mechanism 300 drives a buffer mechanism 200 to move linearly in the horizontal direction. The buffer mechanism 200 then drives an adjusting structure to move, ultimately causing the adjusting mechanism 100 to move the two needles 500 in opposite directions or towards each other. This achieves the purpose of adjusting the outer circumference of the two needles 500, thereby meeting the relevant dimensional requirements of the battery cell and resulting in high adjustment efficiency. The buffer mechanism 200 buffers the driving force of the driving mechanism 300, thus protecting the adjusting mechanism 100. When the adjusting mechanism 100 adjusts the outer circumference of the needles 500 to the ideal state, a fixing mechanism 400 locks the buffer mechanism 200 to prevent further axial movement, thereby fixing the outer circumference of the needles 500 and ensuring adjustment accuracy. Therefore, the winding needle device 10 provided by this utility model improves the quality and speed of battery cell winding, so as to achieve high quality and high efficiency in battery cell winding; by intelligently adjusting the outer diameter of the winding needle 500, the adjustment can be completed without stopping the machine, which not only ensures high precision and high speed of adjustment, but also significantly enhances production efficiency and the overall quality of the battery cell.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A needle winding device, characterized in that, It includes an adjustment mechanism, a buffer mechanism, a drive mechanism, a fixing mechanism, and a winding needle; The adjusting mechanism, the buffering mechanism, and the driving mechanism are connected in sequence. The fixing mechanism is disposed on the buffering mechanism. The number of winding needles is at least two and both are disposed on the adjusting mechanism. The driving mechanism is used to drive the buffering mechanism to move linearly so that the buffering mechanism drives the adjusting mechanism to open or close radially, thereby driving at least two winding needles to move in opposite directions or towards each other. The fixing mechanism is used to lock the buffering mechanism.

2. The needle winding device according to claim 1, characterized in that, The adjustment mechanism includes two mounting shafts and two adjustment components. The two adjustment components are respectively disposed on the two mounting shafts. The two adjustment components are used to drive at least two winding needles to move in opposite directions or towards each other under the drive of the buffer mechanism.

3. The needle winding device according to claim 2, characterized in that, The adjustment assembly includes a sliding rod and a first sliding member. The sliding rod is movably disposed on the mounting shaft. One end of the sliding rod away from the mounting shaft is connected to the buffer mechanism. The sliding rod slides in cooperation with the first sliding member. The first sliding member is connected to the winding needle. The sliding rod is used to drive the first sliding member to move radially when the sliding rod moves axially, so as to drive the winding needle to move radially.

4. The needle winding device according to claim 3, characterized in that, The adjustment assembly further includes a first elastic element, which is disposed on the mounting shaft and abuts against the sliding rod.

5. The needle winding device according to claim 3, characterized in that, The adjustment mechanism further includes two pressure plate assemblies, which are respectively disposed on the two adjustment assemblies; The pressure plate assembly includes a pressure plate, a second sliding member, and a second elastic member connected together. The sliding rod is slidably engaged with the second sliding member. The second sliding member is used to move radially when the sliding rod moves axially, so that the pressure plates of the two pressure plate assemblies move towards or away from each other to jointly press or release the diaphragm. The second elastic member is disposed between the pressure plate and the second sliding member.

6. The needle winding device according to claim 5, characterized in that, The sliding rod is provided with multiple pulleys, the first sliding member is provided with a first sliding groove, the second sliding member is provided with a second sliding groove, the mounting shaft is provided with a third sliding groove, and the multiple pulleys are respectively provided in the first sliding groove, the second sliding groove and the third sliding groove. The first sliding groove is inclined and the inclination directions are opposite, and the third sliding groove extends axially.

7. The needle winding device according to claim 1, characterized in that, The buffer mechanism includes a mounting base, a connecting rod, and a third elastic element. The connecting rod is movably disposed on the mounting base, and a first end cap is provided at one end of the connecting rod. The third elastic element is disposed between the first end cap and the mounting base.

8. The needle winding device according to claim 7, characterized in that, The buffer mechanism further includes a fourth elastic element. The other end of the connecting rod away from the first end cover is sequentially provided with a second end cover, a connecting head, and an abutment. The abutment is movably disposed on the connecting head. One end of the fourth elastic element is connected to the abutment, and the other end is connected to the connecting head. The abutment is connected to the adjustment mechanism.

9. The needle winding device according to claim 1, characterized in that, The fixing mechanism includes an installation component, a clamping component, and a fixing component connected in sequence. The fixing component is connected to the buffer mechanism, and the clamping component is used to lock the fixing component.

10. The needle winding device according to claim 1, characterized in that, The driving mechanism includes a driving mounting component, a driving component, and a top block. The driving component is disposed on the driving mounting component, the top block is disposed on the output end of the driving component, and the top block is connected to the buffer mechanism.

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