A variable diameter needle winding mechanism and a winding machine

Abstract

This utility model relates to the field of battery cell manufacturing technology, and discloses a variable diameter needle winding mechanism and a winding machine. The variable diameter needle winding mechanism includes: a needle holder; two inner needles disposed within the needle holder, which clamp or release a diaphragm; two outer shells disposed outside the needle holder, which move closer to or further away from the needle holder to change the diameter; and an adjustment component disposed between the inner needles and the outer shells. The adjustment component includes a drive rod slidably disposed on the needle holder, a linkage structure between the drive rod and the inner needles for driving the movement of the inner needles, and a diameter-changing structure between the drive rod and the outer shells for driving the movement of the outer shells. The winding machine of this utility model includes the above-mentioned variable diameter winding mechanism. This utility model improves the accuracy of diameter adjustment to adapt to the technical effect of small-circumference power batteries.

Description

Technical Field

[0001] This utility model belongs to the field of battery cell production technology, specifically relating to a variable diameter winding needle mechanism and a winding machine. Background Technology

[0002] The winding machine is the core equipment in the lithium battery winding production process. Its function is to wind the positive and negative electrode sheets and the separator into a battery cell. The winding machine includes a winding needle for winding the electrode sheets and the separator. The winding needle includes a shell. Among them, the circular winding needle is the mainstream design. The winding needle is driven to rotate by a servo motor, and the electrode sheets and the separator are wound alternately according to a preset number of layers.

[0003] However, due to fluctuations in the thickness of the incoming electrode material, the current common practice is to adjust the circumference of the winding needle by applying Teflon tape to the outer shell or using precision shims on the mounting surface of the outer shell to correct electrode misalignment. This method is inefficient and lacks precision. Especially in the production of power batteries with a circumference of less than 200mm, adjusting the outer shell using precision shims makes it difficult to achieve precise and continuous adjustment of the winding needle. Furthermore, the adjustment is time-consuming; operators need to disassemble the winding needle for thorough calibration before reinstalling it, and this process may be repeated multiple times, making the operation cumbersome. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a variable diameter needle winding mechanism and a winding machine. By adjusting the components, a single inner needle and a single outer shell can be adjusted separately, which is beneficial for fine adjustments of the inner needle and the outer shell, improves adjustment accuracy and ease of operation, and can be adapted to the production of power batteries with a circumference of less than 200mm.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects: In a first aspect, this utility model provides a variable diameter needle winding mechanism, including a needle holder; two inner needles disposed within the needle holder, the two inner needles clamping or releasing a diaphragm; two outer shells disposed outside the needle holder, the outer shells moving closer to or further away from the needle holder to change diameter; and an adjustment assembly disposed between the inner needles and the outer shells, the adjustment assembly including a drive rod slidably disposed on the needle holder, a linkage structure for driving the movement of the inner needles being disposed between the drive rod and the inner needles, and a variable diameter structure for driving the movement of the outer shells being disposed between the drive rod and the outer shells.

[0006] In some implementations, the drive rod is provided with an abutment structure, and an elastic element is provided between the abutment structure and the needle holder.

[0007] In some implementations, the needle holder has an inner needle groove, and the linkage structure includes an inner needle slider slidably disposed in the inner needle groove and connected to the inner needle; and a linkage member disposed on the drive rod, the drive rod driving the inner needle slider to slide in the inner needle groove via the linkage member.

[0008] In some implementations, the inner needle slider has an inner needle cam groove, the linkage includes an inner needle cam, and the drive rod drives the inner needle cam to move along the inner needle cam groove to push the inner needle slider to move.

[0009] In some implementations, the inner needle cam groove includes a first inclined section and a straight section that are interconnected. The inner needle cam moves along the first inclined section and drives the inner needle to clamp the diaphragm via the inner needle slider. The inner needle cam moves along the straight section and drives the inner needle to maintain the state of clamping the diaphragm via the inner needle slider.

[0010] In some implementations, the needle holder has a housing groove, and the variable diameter structure includes a housing slider slidably disposed in the housing groove and connected to the housing; and a variable diameter component disposed on the drive rod, the drive rod driving the housing slider to slide in the housing groove via the variable diameter component.

[0011] In some implementations, the outer casing slider has an outer casing cam groove, the variable diameter component includes an outer casing cam, and the drive rod drives the outer casing cam to move along the outer casing cam groove to push the outer casing slider to move.

[0012] In some implementations, the housing cam groove includes a second inclined section and a third inclined section. The housing cam moves along the second inclined section, and the housing cam drives the housing to change diameter via the housing slider. The housing cam moves along the third inclined section, and the housing cam drives the housing to eccentrically displace via the housing slider.

[0013] In some implementations, multiple linkage structures and multiple variable diameter structures are provided, and the multiple linkage structures and multiple variable diameter structures are arranged alternately.

[0014] Secondly, this utility model provides a winding machine, including the aforementioned variable diameter winding needle mechanism.

[0015] In summary, this utility model has at least the following advantages: 1. The variable diameter needle winding mechanism provided by this utility model allows the drive rod to slide on the needle holder to clamp or loosen the diaphragm of the inner needle, thereby bringing the outer shell closer to or away from the needle holder and adjusting the circumference of the variable diameter needle winding mechanism.

[0016] During the adjustment process, the drive rod drives the corresponding inner needle to move via the linkage structure. Through the movement of a single inner needle relative to another inner needle, or the simultaneous movement of two inner needles, the two inner needles can clamp or loosen the diaphragm. When the variable diameter winding needle mechanism clamps the diaphragm with two inner needles, it alternately winds the electrode and the diaphragm. The drive rod drives the corresponding outer shell to move via the variable diameter structure. Through a single outer shell moving closer to or away from the needle holder, or two outer shells moving closer to or away from the needle holder respectively, the variable diameter winding needle mechanism changes the circumference to achieve the effect of correcting the misalignment of the electrode tab.

[0017] The inner needle and outer shell can be adjusted by moving the drive rod. Compared with traditional needle winding, this eliminates the need for operators to repeatedly disassemble and adjust the needle winding, thus improving operational convenience. The two outer shells can be individually adjusted in position via corresponding drive rods and a variable diameter structure, enabling fine adjustments to the circumference. The variable diameter needle winding mechanism is compatible with the production of power batteries with a circumference of less than 200mm, improving the accuracy and efficiency of correcting the tabs of small-circumference power batteries.

[0018] 2. The winding machine provided by this utility model has a compact structure and a high adjustment accuracy of the variable diameter winding needle mechanism, which ensures stable diaphragm clamping and helps to ensure the winding quality of the diaphragm and electrode sheets. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the variable diameter needle winding mechanism according to a specific embodiment of the present invention.

[0020] Figure 2 This is a side view of the variable diameter needle winding mechanism according to a specific embodiment of the present utility model.

[0021] Figure 3 This is a front view of the variable diameter needle winding mechanism according to a specific embodiment of the present utility model.

[0022] Figure 4 for Figure 3 Schematic diagram of the EE plane section.

[0023] Figure 5 This is a schematic diagram of the linkage structure and the variable diameter structure in a specific embodiment of this utility model.

[0024] Figure 6 This is a schematic diagram of the inner needle slider and the outer shell slider in a specific embodiment of this utility model.

[0025] Figure 7 This is a schematic diagram of the outer shell and the outer shell slider in a specific embodiment of the present utility model.

[0026] Marked in the image: 1. Needle holder; 11. Limiting groove; 12. Inner needle slide groove; 13. Outer shell slide groove; 14. Elastic element; 15. Guide groove; 2. Inner needle; 3. Outer shell; 4. Adjustment assembly; 41. Drive rod; 411. Abutting structure; 4111. Abutting ring; 412. Guide wheel; 42. Linkage structure; 421. Inner needle slider; 422. Inner needle cam groove; 4221. First inclined section; 4222. Straight section; 423. Inner needle cam; 424. Inner needle camshaft; 43. Variable diameter structure; 431. Outer shell slider; 432. Outer shell cam groove; 4321. Second inclined section; 4322. Third inclined section; 433. Outer shell cam; 434. Outer shell camshaft; 5. Base. 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. The described embodiments are some, but not all, of the embodiments of this utility model.

[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] Example 1: Please see Figures 1-3 The variable diameter winding needle mechanism of this utility model can be compatible with the production of power batteries with different circumferences, especially power batteries with a circumference of 150~200mm, which is beneficial to improving the accuracy and efficiency of tab correction for small circumference power batteries.

[0030] Please see Figure 1 and Figure 2 The variable diameter needle winding mechanism of this utility model includes a base 5, on which a needle holder 1 is provided. In some specific embodiments, two needle holders 1 are provided, and a clamping area for diaphragm insertion is formed between the two needle holders 1. The needle holder 1 is detachably connected to the base 5. Preferably, the needle holder 1 can be assembled with the base 5 by bolts.

[0031] Two inner needles 2 are arranged between the two needle holders 1. Specifically, the two inner needles 2 are symmetrically arranged on the inner side of the needle holder 1 and clamp or release the diaphragm within the clamping area. The inner needles 2 can be rigid clamping needles, which helps to improve the clamping stability of the diaphragm. Two outer shells 3 are arranged on the outer side of the needle holder 1. The two outer shells 3 are mirror-symmetrically arranged on the outer side of the needle holder 1 and correspond to the inner needles 2. By adjusting the outer shells 3 to be closer to or farther away from the needle holder 1, the diameter-changing needle winding mechanism realizes the diameter adjustment.

[0032] An adjustment assembly 4 is provided between the inner needle 2 and the outer shell 3. The adjustment assembly 4 can drive the inner needle 2 to clamp or release the diaphragm and drive the outer shell 3 to perform diameter adjustment. The adjustment assembly 4 includes a drive rod 41, a linkage structure 42, and a diameter adjustment structure 43. The drive rod 41 is slidably disposed on the needle holder 1. Specifically, the drive rod 41 is movably disposed between the inner needle 2 and the needle holder 1. The linkage structure 42 is disposed between the drive rod 41 and the inner needle 2 to drive the inner needle 2 to move. The diameter adjustment structure 43 is disposed between the drive rod 41 and the outer shell 3 to drive the outer shell 3 to move.

[0033] Please see Figure 3 In a preferred embodiment, the needle holder 1 is provided with a guide groove 15, which is specifically a horizontally arranged waist-shaped slot. The drive rod 41 is provided with a guide wheel 412, which is slidably disposed in the guide groove 15. When the drive rod 41 moves, the guide wheel 412 slides along the guide groove 15 to guide the movement of the drive rod 41 and improve the stability of the movement and adjustment of the drive rod 41.

[0034] Please see Figures 1-3 As the drive rod 41 gradually retracts from the inner side of the needle holder 1, it drives the corresponding inner needle 2 to move via the linkage structure 42. This inner needle 2 moves closer to another inner needle 2, or the two drive rods 41 move synchronously, allowing the two inner needles 2 to approach each other and clamp the diaphragm. The clamping force of the two inner needles 2 on the diaphragm can be adjusted by the distance the drive rod 41 moves into or out of the needle holder 1, making operation convenient. The diameter change of the outer shell 3 and the clamping of the inner needle 2 are linked by the drive rod 41. While driving the inner needle 2, the drive rod 41 simultaneously drives the outer shell 3 away from the needle holder 1 via the diameter change structure 43. The outer shell 3 is in an open state, increasing the circumference of the diameter-changing needle winding mechanism, which can correct electrode misalignment. Similarly, the diameter change of the outer shell 3 can be adjusted by controlling the distance the drive rod 41 moves into or out of the needle holder 1.

[0035] When the drive rod 41 moves in the opposite direction, the two inner needles 2 are driven away from the diaphragm that can be loosened by the linkage structure 42, and the wound battery cell is unloaded. The outer shell 3 moves closer to the needle holder 1 through the variable diameter structure 43 as the drive rod 41 moves. The outer shell 3 is in a closed state, and the circumference of the variable diameter winding needle mechanism decreases.

[0036] Two drive rods 41 control the inner needle 2 and outer shell 3 on the corresponding sides for flexible adjustment. The variable diameter winding needle mechanism can adapt to the production of power batteries with smaller circumferences, which is conducive to improving the accuracy of variable diameter fine adjustment. It is also highly efficient and does not require operators to frequently disassemble the winding needle for adjustment, making it easy to operate.

[0037] Example 2: The difference between this embodiment and Embodiment 1 is that this embodiment has made further structural optimizations to the adjustment component 4. Please refer to [link / reference]. Figures 3-7 .

[0038] Please see Figure 3 and Figure 4 In this embodiment, the drive rod 41 is provided with an abutment structure 411. In some specific embodiments, a limiting groove 11 is formed on the needle holder 1. The abutment structure 411 includes an abutment ring 4111, which is sleeved on the drive rod 41. An elastic element 14 is provided between the abutment ring 4111 and the needle holder 1. The elastic element 14 is preferably, but not limited to, a spring. In the initial state, the drive rod 41 compresses the elastic element 14 through the abutment ring 4111. When the drive rod 41 retracts from the needle holder 1 until the abutment ring 4111 abuts against the inner wall of the limiting groove 11, the drive rod 41 is limited. Specifically, the drive rod 41 is provided with a lead screw, which is connected to an external structure, and the drive rod 41 can be locked.

[0039] Please see Figure 5 In some preferred embodiments, the needle holder 1 is provided with an inner needle groove 12. Specifically, the inner needle groove 12 is a vertically formed groove. The linkage structure 42 includes an inner needle slider 421, which is slidably disposed within the inner needle groove 12. The inner needle slider 421 is connected to the inner needle 2. Specifically, the inner needle 2 can be assembled to the inner needle slider 421 by bolts. Furthermore, the inner needle slider 421 is provided with ball bearings, which roll along the inner wall of the inner needle groove 12, thereby improving the smoothness of the movement of the inner needle slider 421.

[0040] Please see Figure 6 A linkage is provided on the drive rod 41. The drive rod 41 drives the inner needle slider 421 to slide up and down within the inner needle groove 12 via the linkage, thereby driving the inner needle 2 to move and clamp or loosen the diaphragm. In some specific embodiments, an inner needle cam groove 422 is provided on the inner needle slider 421. Specifically, the inner needle cam groove 422 includes a first inclined section 4221 and a straight section 4222 that are connected to each other. The first inclined section 4221 can be inclined relative to the moving direction of the drive rod 41, and the straight section 4222 can be parallel to the moving direction of the drive rod 41.

[0041] The linkage includes an inner needle camshaft 424, which is connected to a drive rod 41. Specifically, the inner needle camshaft 424 can be assembled with the drive rod 41 by bolts. An inner needle cam 423 is provided on the inner needle camshaft 424. The inner needle cam 423 moves within the inner needle cam groove 422. When the drive rod 41 retracts or enters the inner side of the needle holder 1, the drive rod 41 drives the inner needle camshaft 424 and the inner needle cam 423 to move. The inner needle cam 423 presses down or lifts the inner needle slider 421. The inner needle slider 421 moves radially along the inner needle groove 12, thereby driving the corresponding inner needle 2 to move closer to or away from another inner needle 2. When the inner needle cam 423 moves from the first inclined section 4221 to the straight section 4222, the inner needle slider 421 drives the corresponding inner needle 2 to approach the other inner needle 2, and the two inner needles 2 close to clamp the diaphragm. When the inner needle cam 423 moves within the straight section 4222, the inner needle slider 421 drives the inner needle 2 to maintain the state of clamping the diaphragm.

[0042] In a preferred embodiment, the needle holder 1 has a housing groove 13. Specifically, the housing groove 13 is arranged parallel to the inner needle groove 12. The variable diameter structure 43 includes a housing slider 431, which is slidably disposed within the housing groove 13. Please refer to [link to previous text]. Figure 7 The outer casing slider 431 is connected to the outer casing 3. Specifically, the outer casing 3 can be assembled with the outer casing slider 431 by bolts.

[0043] Please see Figure 6 A diameter-changing component is provided on the drive rod 41. The drive rod 41 drives the outer shell slider 431 to slide up and down within the outer shell groove 13 via the diameter-changing component, thereby driving the outer shell 3 to move. The outer shell 3 opens or closes to change the circumference of the diameter-changing needle winding mechanism. In some specific embodiments, an outer shell cam groove 432 is provided on the outer shell slider 431. Specifically, the outer shell cam groove 432 includes a second inclined section 4321 and a third inclined section 4322 that are connected to each other. The second inclined section 4321 and the first inclined section 4221 have opposite inclination directions, and the third inclined section 4322 and the first inclined section 4221 have opposite inclination directions. The inclination angle of the third inclined section 4322 is greater than the inclination angle of the second inclined section 4321.

[0044] The diameter-changing component includes a housing camshaft 434, which is connected to a drive rod 41. Specifically, the housing camshaft 434 can be bolted to the drive rod 41. A housing cam 433 is provided on the housing camshaft 434. The housing cam 433 moves within the housing cam groove 432. When the drive rod 41 retracts or enters the inner side of the needle holder 1, the drive rod 41 drives the housing camshaft 434 and the housing cam 433 to move. The housing cam 433 presses down or lifts the housing slider 431, which moves radially along the housing groove 13, thereby driving the housing 3 to change diameter. When the housing cam 433 moves from the second inclined section 4321 to the third inclined section 4322, the housing slider 431 drives the corresponding housing 3 away from the needle holder 1 to open it up. When the housing cam 433 moves within the third inclined section 4322, the housing slider 431 drives the housing 3 to achieve eccentric displacement, thereby achieving the purpose of changing the circumference. The radial displacements of the two outer shells 3 are mirror-symmetrical. The radial displacement changes the circumference of the variable diameter winding needle mechanism, thereby achieving the effect of correcting the misalignment of the electrode tabs.

[0045] In a preferred embodiment, multiple linkage structures 42 and multiple diameter-changing structures 43 are provided, and the multiple linkage structures 42 and multiple diameter-changing structures 43 are arranged alternately, that is, the inner needle slider 421 and the outer shell slider 431 are arranged alternately, resulting in a compact structure. The linkage between the inner needle 2, the outer shell 3 and the drive rod 41 is achieved, which is beneficial to compressing the size of the inner needle 2, thereby adapting to power batteries with smaller circumferences.

[0046] During the process of pulling the drive rod 41 to retract the needle holder 1, the drive rod 41 drives the inner needle cam 423 and the outer shell cam 433 to move. The inner needle cam 423 moves along the inner needle cam groove 422, causing the inner needle slider 421 to move radially within the inner needle groove 12. In turn, the inner needle slider 421 drives the inner needles 2 to move closer to each other to clamp the diaphragm. Meanwhile, the outer shell cam 433 moves along the outer shell cam groove 432, causing the outer shell slider 431 to move radially within the outer shell groove 13. The outer shell slider 431 drives the outer shell 3 to open, increasing the circumference of the variable diameter winding needle mechanism.

[0047] Example 3: This embodiment provides a winding machine based on the above embodiments.

[0048] A winding machine includes an unwinding mechanism, a traction roller, and the aforementioned variable-diameter winding mechanism. The unwinding mechanism unwinds positive electrode sheets, negative electrode sheets, and diaphragm rolls, respectively. A traction roller is provided on one side of the unwinding mechanism, and the traction roller conveys the unwound positive electrode sheets, negative electrode sheets, and diaphragm to the variable-diameter winding mechanism. A motor is driven to the base, and the motor drives the base to rotate. The variable-diameter winding mechanism winds the positive electrode sheets, negative electrode sheets, and diaphragm. It is understood that the unwinding mechanism and the traction roller are known to those skilled in the art and are feasible; therefore, they are not described in detail in this embodiment.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] 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.

[0051] Furthermore, terms such as "horizontal," "vertical," and "sag" 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 relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0052] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A variable diameter spooling mechanism, characterized by, include Needle holder (1); There are two inner needles (2), which are located inside the needle holder (1). The two inner needles (2) clamp or loosen the diaphragm. There are two outer shells (3), which are located on the outside of the needle holder (1). The outer shells (3) are close to or far from the needle holder (1) with varying diameters. as well as An adjustment component (4) is disposed between the inner needle (2) and the outer shell (3). The adjustment component (4) includes a drive rod (41) slidably disposed on the needle holder (1). A linkage structure (42) for driving the inner needle (2) to move is provided between the drive rod (41) and the inner needle (2). A variable diameter structure (43) for driving the outer shell (3) to move is provided between the drive rod (41) and the outer shell (3).

2. The variable diameter quill mechanism of claim 1, wherein, The drive rod (41) is provided with an abutment structure (411), and an elastic element (14) is provided between the abutment structure (411) and the needle holder (1).

3. The variable diameter quill mechanism of claim 2, wherein, The needle holder (1) is provided with an inner needle groove (12), and the linkage structure (42) includes An inner needle slider (421) is slidably disposed within the inner needle groove (12), and the inner needle slider (421) is connected to the inner needle (2); and A linkage component is provided on the drive rod (41), and the drive rod (41) drives the inner needle slider (421) to slide within the inner needle groove (12) via the linkage component.

4. The variable diameter quill mechanism of claim 3, wherein, The inner needle slider (421) has an inner needle cam groove (422), and the linkage includes an inner needle cam (423). The drive rod (41) drives the inner needle cam (423) to move along the inner needle cam groove (422) to push the inner needle slider (421) to move.

5. The variable diameter quill mechanism of claim 4, wherein, The inner needle cam groove (422) includes a first inclined section (4221) and a straight section (4222) that are connected to each other. The inner needle cam (423) moves along the first inclined section (4221). The inner needle cam (423) drives the inner needle (2) to clamp the diaphragm via the inner needle slider (421). The inner needle cam (423) moves along the straight section (4222), and the inner needle cam (423) drives the inner needle (2) to keep clamping the diaphragm via the inner needle slider (421).

6. The variable diameter quill mechanism of claim 2, wherein, The needle holder (1) is provided with a housing groove (13), and the variable diameter structure (43) includes The outer casing slider (431) is slidably disposed in the outer casing groove (13), and the outer casing slider (431) is connected to the outer casing (3); as well as A variable diameter component is provided on the drive rod (41), and the drive rod (41) drives the outer shell slider (431) to slide in the outer shell groove (13) via the variable diameter component.

7. The variable diameter quill mechanism of claim 6, wherein, The outer casing slider (431) has an outer casing cam groove (432), and the variable diameter component includes an outer casing cam (433). The drive rod (41) drives the outer casing cam (433) to move along the outer casing cam groove (432) to push the outer casing slider (431) to move.

8. The variable diameter quill mechanism of claim 7, wherein, The outer casing cam groove (432) includes a second inclined section (4321) and a third inclined section (4322). The outer casing cam (433) moves along the second inclined section (4321). The outer casing cam (433) drives the outer casing (3) to change diameter via the outer casing slider (431). The outer casing cam (433) moves along the third inclined section (4322), and the outer casing cam (433) drives the outer casing (3) to eccentrically displace via the outer casing slider (431).

9. The variable diameter needle winding mechanism according to claim 1, characterized in that, Multiple linkage structures (42) and multiple variable diameter structures (43) are provided, and multiple linkage structures (42) and multiple variable diameter structures (43) are alternately arranged.

10. A winding machine, characterized by Includes the variable diameter needle winding mechanism as described in any one of claims 1-9.

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