Winding needle mechanism and winding equipment

Abstract

The utility model provides a winding needle mechanism and winding equipment. The winding needle mechanism comprises a mounting base, an inner needle body, an outer needle body, a moving part and a connecting part, the inner needle body and the outer needle body are arranged on the mounting base, and the outer needle body is located on the periphery of the inner needle body and can move in the radial direction of the inner needle body; the moving part is arranged on the mounting base, and the minimum included angle between the moving direction of the moving part and the axial direction of the outer needle body is an acute angle; the connecting piece is connected between the outer needle body and the moving piece and drives the outer needle body to move in the radial direction under driving of the moving piece. Through the arrangement, the outer needle body can be driven to radially displace relative to the inner needle body by controlling the moving part to move, so that the outer perimeter of the winding needle is adjusted, the structure is simple, the control is convenient, the linear action of the outer needle body relative to the inner needle body is controlled through the rotating action of the rotating part, and the power consumption is favorably reduced.

Description

Technical Field

[0001] The present application relates to the field of battery processing technology, and in particular to a winding needle mechanism and a winding device. Background Art

[0002] In the production process of lithium batteries, the winding core is formed by winding the separator and the positive and negative electrodes through the winding needle mechanism of the winding machine. The outer circumference of the winding needle is related to the alignment of the electrode tabs and the size of the battery cell, so the outer circumference of the winding needle directly affects the quality of the battery cell. The existing winding needle generally changes the outer circumference by sticking Teflon on the outer surface, which is inconvenient to adjust.

[0003] The existing winding needles with automatically adjustable outer circumference adjust the inner and outer needles at the same time through an inclined wedge or a slide groove. Generally, the linear motion mechanism inside or outside the winding needle provides the driving force to complete the adjustment of the outer circumference of the winding needle. Among them, when the drive motor is installed inside the winding needle, the drive motor rotates with the winding needle, and a conductive slip ring needs to be installed for power supply and signal transmission, which has a complex structure. When the external thrust is provided to adjust the outer circumference of the winding needle, the structure is complex, the parts precision requirements are very high, and there needs to be an external thrust to maintain the outer circumference of the winding needle. Utility Model Content

[0004] In view of this, the present application provides a winding needle mechanism and a winding device, which have a simple structure, are easy to operate, and do not require external power to maintain the outer circumference of the winding needle.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A needle winding mechanism, comprising:

[0007] Install the base;

[0008] The inner needle body and the outer needle body are arranged on the mounting base, and the outer needle body is located at the outer periphery of the inner needle body and can move along the radial direction of the inner needle body;

[0009] A moving member is arranged on the mounting base, and the minimum angle between the moving direction of the moving member and the axial direction of the outer needle body is an acute angle;

[0010] The connecting member is connected between the outer needle body and the moving member, and drives the outer needle body to move radially under the driving of the moving member.

[0011] Optionally, one end of the connecting member is connected to one of the outer needle body and the moving member, and the other end moves in the other member along the axial direction of the outer needle body.

[0012] Optionally, it includes a rotating member threadedly connected to the moving member, and the rotating member rotates to move the moving member along the moving direction.

[0013] Optionally, the moving member is a threaded rod, and the threaded rod includes an inclined portion that moves relative to the rotating member and an axial portion that moves relative to the connecting member.

[0014] Optional,

[0015] The outer needle body, the connecting member and the moving member are all arranged in a plurality in the circumferential direction of the needle winding mechanism, and each of the outer needle body and each of the connecting members are arranged in a aligned manner in the axial direction, and each of the connecting members and each of the moving members are arranged in a aligned manner in the axial direction;

[0016] The rotating member is threadedly connected to all the moving members to drive all the moving members to move.

[0017] Optionally, it also includes a driving member transmission-connected to the rotating member, so that the rotating member rotates under the drive of the driving member.

[0018] Optionally, a side of the driving member close to the rotating member is provided with an avoidance groove for avoiding the moving member, so that the moving member can move a greater distance along the moving direction.

[0019] Optionally, an expansion component is provided on the inner side of the inner needle body, and the expansion component can controllably expand and contract along the radial direction of the inner needle body so that the inner needle body can clamp the diaphragm.

[0020] Optionally, the expansion assembly includes:

[0021] An airbag seat connected to the inner side of the inner needle body;

[0022] The air bag body is arranged on a side of the air bag seat away from the inner needle body.

[0023] A needle winding device comprises a needle winding mechanism as described in any one of the above items.

[0024] The needle winding mechanism and winding device provided by the present application, in the working process, by controlling the moving member to move in different directions, and the minimum angle between the moving direction of the moving member and the axial direction of the needle winding mechanism is an acute angle, when the moving member moves, the other end of the connecting member moves axially inside the outer needle body and the other of the moving members, thereby driving the outer needle body to move radially close to or away from the inner needle body, thereby realizing the increase or decrease of the outer diameter and outer circumference of the needle winding. When the rotating member drives the moving member to move in the first direction, it drives the outer needle body to move radially away from the inner needle body along the inner needle body, so that the overall outer diameter and outer circumference of the needle winding are increased; when the rotating member drives the moving member to move in the second direction, it drives the outer needle body to move radially close to the inner needle body along the inner needle body, so that the overall outer diameter and outer circumference of the needle winding are reduced. In this way, by controlling the movement of the moving member, the outer needle body can be driven to move radially relative to the inner needle body to realize the adjustment of the outer circumference of the needle winding, the structure is simple and easy to operate, and the linear movement of the outer needle body relative to the inner needle body is controlled by the rotation action of the rotating member, which is conducive to reducing power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0026] Figure 1 A cross-sectional view of a needle winding mechanism shown in some embodiments;

[0027] Figure 2 A side view of a needle winding mechanism is shown for some embodiments.

[0028] In the figure: 1-inner needle body, 2-outer needle body, 3-expansion assembly, 4-reset member, 5-moving member, 6-connecting member, 7-rotating member, 8-driving member, 9-support tip, 10-mounting base;

[0029] 501 - inclined portion, 502 - axial portion, 801 - avoidance groove. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] like Figure 1-Figure 2As shown, an embodiment of the present application provides a needle winding mechanism, which mainly includes a mounting base 10, an inner needle body 1, an outer needle body 2, a moving part 5 and a connecting part 6.

[0032] The inner needle body 1 constitutes the main part of the winding needle. A mounting base 10 is provided at one end of the inner needle body 1, and a supporting tip 9 is provided at the other end. During the winding process, the supporting tip 9 is inserted into an independently arranged needle mouth on the outside, and the inner needle body 1 is driven to rotate through the mounting base 10 to complete the winding of the electrode and the diaphragm.

[0033] The outer needle body 2 is connected to the inner needle body 1, and the outer needle body 2 is located at the outer periphery of the inner needle body 1, and the outer needle body 2 can move relative to the inner needle body 1 along the radial direction of the inner needle body 1, that is, the outer needle body 2 can approach and move away from the inner needle body 1 along the radial direction of the inner needle body 1, thereby changing the outer diameter and outer circumference of the winding needle. For example, a guide rod is provided on the inner needle body 1, and a guide hole is provided on the outer needle body 2. The extension direction of the guide rod and the guide hole is the radial direction of the inner needle body 1. The guide rod is inserted into the guide hole, and a ball guide sleeve is provided between the guide rod and the guide hole so that the guide rod and the guide hole can slide and cooperate. In this way, the form in which the guide rod cooperates with the guide hole through the ball guide sleeve is stable and reliable, and the resistance is small, which is conducive to improving the reliability of the structure. Moreover, a reset member 4 is provided between the outer needle body 2 and the inner needle body 1, and the reset member 4 can be set as a reset tension spring, which can drive the outer needle body 2 to approach the inner needle body 1 in the radial direction through the reset tension spring, thereby assisting in completing the reset of the outer needle body 2.

[0034] The moving member 5 is arranged on the mounting base 10, and the minimum angle between the moving direction of the moving member 5 and the axial direction of the outer needle body 2 is an acute angle. For example, the moving member 5 can be moved by a rotatable threaded disk and a threaded rod; the moving member 5 can also be moved by a gear rack; the moving member 5 can also be moved by a hydraulic telescopic rod; the moving member 5 can also be moved by a slide slot slider, etc. The minimum angle between the moving direction of the moving member 5 and the axial direction of the outer needle body 2, that is, Figure 1 The minimum angle between the direction indicated by the arrow A or arrow B and the direction indicated by the double-headed arrow X is an acute angle, so as to exclude the situation where the above angle is a right angle or a flat angle, so that the movement of the moving member 5 can exert an oblique force on the connecting member 6 and the outer needle body 2, and the oblique force can be decomposed into the axial direction ( Figure 1 The axial force (in the direction indicated by the double-headed arrow X) and the radial force ( Figure 1 The radial force (in the direction indicated by the double-headed arrow Y) causes the connecting member 5 to move relative to the outer needle body 2 or the moving member 5, and the radial force causes the outer needle body 2 to move radially along the inner needle body 1.

[0035] Furthermore, the connecting member 6 is connected between the outer needle body 2 and the moving member 5, and drives the outer needle body 2 to move radially under the drive of the moving member 5. Since the minimum angle between the moving direction of the moving member 5 and the axial direction of the outer needle body 2 is an acute angle, the movement of the moving member 5 will exert a force on the connecting member 6 along the moving direction ( Figure 1 The force along the axial direction will cause a relative displacement between the connecting member 6 and the movable member 5 or the outer needle body 2, while the radial force will act on the outer needle body 2 through the connecting member 6, causing the outer needle body 2 to move radially relative to the inner needle body 1.

[0036] During the working process, the rotating member 7 drives the moving member 5 along Figure 1 When the outer needle body 2 moves in the direction indicated by the middle arrow A, it will drive the outer needle body 2 away from the inner needle body 1 along the radial direction of the inner needle body 1, so that the overall outer diameter and outer circumference of the winding needle are increased; the rotating member 7 drives the moving member 5 along Figure 1 When moving in the direction indicated by the middle arrow B, the outer needle body 2 is driven to approach the inner needle body 1 along the radial direction of the inner needle body 1, so that the overall outer diameter and outer circumference of the winding needle are reduced.

[0037] It should be noted that the radial direction is Figure 1 The longitudinal direction is the direction indicated by the double-headed arrow Y, and the axial direction is the direction indicated by the double-headed arrow X.

[0038] It should also be noted that the moving form of the moving member 5 is not limited here, and the moving member 5 can move along a straight line, such as along Figure 1 The movable member 5 can also move along a curve, and ensure that the minimum angle between the tangent direction of the movable member 5 at any position of the curved track and the axial direction of the outer needle body 2 is an acute angle.

[0039] With such an arrangement, the outer needle body 2 can be driven to move radially relative to the inner needle body 1 by controlling the movement of the movable member 5, so as to achieve adjustment of the outer circumference of the winding needle. The structure is simple and easy to operate. Moreover, the linear movement of the outer needle body 2 relative to the inner needle body 1 is controlled by the rotational action of the rotating member 7, which is beneficial to reducing power consumption.

[0040] In some embodiments, one end of the connecting member 6 is connected to one of the outer needle body 2 and the moving member 5, and the other end moves in the other along the axial direction of the outer needle body 2. Specifically, a slide groove is provided in the other to enable relative axial movement with the other end of the connecting member 6. During operation, the rotating member 7 drives the moving member 5 to move in the axial direction. Figure 1 When moving in the direction indicated by the middle arrow A, the distance that the connecting member 6 extends into the other becomes longer, driving the outer needle body 2 away from the inner needle body 1 along the radial direction of the inner needle body 1, so that the overall outer diameter and outer circumference of the winding needle are increased; the rotating member 7 drives the moving member 5 along Figure 1 When moving in the direction indicated by the middle arrow B, the distance that the connecting member 6 extends into the other becomes shorter, driving the outer needle body 2 to approach the inner needle body 1 along the radial direction of the inner needle body 1, so that the overall outer diameter and outer circumference of the winding needle are reduced.

[0041] In this embodiment, an optional implementation is provided, such as Figure 1 As shown, one end of the connecting member 6 is fixedly connected to the outer needle body 2 , and the other end can move in a groove provided in the moving member 5 .

[0042] In this embodiment, another optional implementation is also provided, which is not shown in the figure. One end of the connecting member 6 is fixedly connected to the moving member 5, and the other end can move in a groove set in the outer needle body 2.

[0043] It should be noted that the movement mode of the other end of the connecting member 6 in the circumferential direction in the other of the outer needle body 2 and the moving member 5 is not limited here. For example, the movement can be achieved by relative sliding or relative threaded rotation.

[0044] In some embodiments, the needle winding mechanism includes a rotating member 7 threadedly connected to the moving member 5, and the rotating member 7 rotates to move the moving member 5 along the moving direction. Specifically, the movement of the moving member 5 is achieved by threading the rotating member 7 with the moving member 5, which has a simple structure, high transmission efficiency, good device stability, and the threaded connection can be self-locking, which can limit the position of the outer needle body 2, thereby preventing the outer needle body 2 from being displaced relative to the inner needle body 1, and thereby maintaining the outer circumference of the winding needle within a preset range to improve the winding quality.

[0045] In some embodiments, the moving member 5 is a threaded rod, which includes an inclined portion 501 that moves relative to the rotating member 7 and an axial portion 502 that moves relative to the connecting member 6. Specifically, an external thread is provided on the inclined portion 501 of the threaded rod, and an internal thread is provided on the rotating member 7. The rotating member 7 rotates to drive the inclined portion 501 and the axial portion 502 to move along the rotating member 7. Figure 1 The outer needle body 2 moves in the direction indicated by the arrow A or arrow B. Exemplarily, a telescopic hole is provided in the axial direction on the axial portion 502, so that the other end of the connecting member 6 can telescopically move in the telescopic hole, so that the movement of the moving member 5 can drive the outer needle body 2 to move radially relative to the inner needle body 1. In this way, the axial portion 502 can provide a longer telescopic distance for the connecting member 6, thereby providing a larger radial displacement range for the outer needle body 2.

[0046] In addition, the threaded rod can also be provided with only an inclined portion 501, and a telescopic hole is provided at the end of the inclined portion 501 close to the outer needle body 2, so that the other end of the connecting member 6 can be telescopically moved in the telescopic hole, so that the radial movement of the outer needle body 2 can also be achieved through the movement of the moving member 5.

[0047] In some embodiments, the outer needle body 2, the connecting member 6 and the moving member 5 are all arranged in a plurality on the circumference of the needle winding mechanism, and each outer needle body 2 is aligned with each connecting member 6 in the axial direction, and each connecting member 6 is aligned with each moving member 5 in the axial direction; the rotating member 7 is threadedly connected with all the moving members 5 to drive all the moving members 5 to move. Specifically, the outer needle body 2, the connecting member 6 and the moving member 5 are all arranged in a plurality on the circumference of the needle winding mechanism, and the outer needle body 2, the connecting member 6 and the moving member 5 are ensured to be arranged correspondingly, so that when the moving member 5 is driven to move by the rotating member 7 and then the outer needle body 2 is driven to move radially relative to the inner needle body 1, the stability of the above transmission is ensured, and the stability of the radial movement of the outer needle body 2 is ensured. And it is ensured that the rotating member 7 is threadedly connected with all the moving members 5 and drives all the moving members 5 to move, so that multiple moving members 5 can be ensured to move synchronously, and the amplitude of movement is the same, further ensuring that the amplitude of radial movement of at least two outer needle bodies 2 is the same, and the movement of the outer needle body 2 is made more stable.

[0048] It should be noted that the rotating member 7 is a hollow annular rotating disk, and the hollow portion of the transmission member allows the transmission shaft that drives the inner needle body 1 to rotate to pass through the mounting base 10, thereby facilitating the winding of the winding needle.

[0049] In addition, multiple rotating members 7 may also be provided, and each rotating member 7 drives at least one moving member 5 to move. When multiple rotating members 7 drive multiple moving members 5 to move to achieve radial movement of the outer needle body 2 relative to the inner needle body 1, the rotation speed of the rotating members 7 is ensured to be the same to ensure that the movement amplitude of the outer needle body 2 is the same.

[0050] In some embodiments, the needle winding mechanism further includes a driving member 8 that is transmission-connected to the rotating member 7, so that the rotating member 7 rotates under the drive of the driving member 8. Here, by providing the driving member 8 that drives the rotating member 7 to rotate, the rotation of the rotating member 7 can be conveniently and quickly realized, and then the movement of the moving member 5 can be quickly realized, and finally the radial movement of the outer needle body 2 can be realized, which is time-saving, labor-saving and efficient.

[0051] In addition, the driving member 8 may not be provided, and a driving handle for driving the rotating member 7 to rotate may be provided. The operator manually rotates the driving handle to realize the rotation of the rotating member 7, thereby realizing the radial movement of the outer needle body 2.

[0052] In some embodiments, a side of the driving member 8 close to the rotating member 7 is provided with an avoidance groove 801 for avoiding the moving member 5, so that the moving member 5 moves a greater distance along the moving direction. Specifically, taking the driving member 8 being arranged close to the rotating member 7 as an example, a avoidance groove 801 is arranged on the side of the driving member 8 close to the moving member 5, and the avoidance groove 801 allows the moving member 5 to move into the avoidance groove 801, so that when the rotating member 7 drives the moving member 5 to move, the moving member 5 has a greater moving distance, ensuring the stability of the movement of the moving member 5, and ensuring the stability of the radial movement of the outer needle body 2 driven by the moving member 5. Moreover, the setting of the avoidance groove 801 can also play a guiding role in the moving process of the moving member 5.

[0053] Furthermore, an internal thread adapted to the moving member 5 is provided on the inner wall of the avoidance groove 801. Such a configuration can further ensure the stability of the moving member 5 during movement and ensure the stability of the above-mentioned transmission.

[0054] In addition, the avoidance groove 801 may not be provided on the driving member 8. In this case, the axial dimension of the preferred transmission member is sufficient to support the movement of the movable member 5 and to ensure the smooth movement of the driving member 8. Furthermore, the driving member 8 and the rotating member 7 are transmitted through the shaft, and there is a distance between the driving member 8 and the rotating member 7, which can also achieve the effect of avoiding the movable member 5.

[0055] In some embodiments, an expansion component 3 is provided inside the inner needle body 1, and the expansion component 3 can controllably expand and contract along the radial direction of the inner needle body 1. When the expansion component 3 expands along the radial direction of the inner needle body 1, the expansion component 3 inside the inner needle body 1 can clamp the diaphragm, and when the expansion component 3 contracts along the radial direction of the inner needle, the expansion component 3 inside the inner needle body 1 can loosen the diaphragm. In this way, by controlling the expansion and contraction of the expansion component 3, the clamping and loosening of the diaphragm are achieved, which is simple to operate and easy to control.

[0056] It should be noted that the inner needle body 1 has a first needle body and a second needle body, the extension directions of the first needle body, the second needle body and the inner needle body 1 are parallel, the first needle body and the second needle body are arranged at intervals, and a gap for the diaphragm to pass through is formed between the first needle body and the second needle body, and the above-mentioned expansion component 3 is arranged in the gap. For example, two expansion components 3 are provided, and are respectively provided on the first needle body and the second needle body, or one expansion component 3 is provided, and is provided on the first needle body or the second needle body.

[0057] Among them, the expansion component 3 includes an airbag seat and an airbag body, the airbag seat is connected to the inner side of the inner needle body 1, and the airbag body is connected to the side of the airbag seat away from the inner needle body 1. Specifically, two expansion components 3 are provided, one expansion component 3 is provided on the side of the first needle body close to the second needle body, and the other expansion component 3 is provided on the side of the second needle body close to the first needle body. In this way, by inflating the airbag bodies on the two airbag seats, the two airbag bodies can clamp the diaphragm, and by deflating the airbag bodies on the two airbag seats, the two airbag bodies can loosen the diaphragm, which is beneficial to ensure the stability and reliability of the winding process.

[0058] Specifically, an airbag groove is provided on the airbag seat, and the airbag body is provided in the airbag groove, which is beneficial to protecting the airbag body. Moreover, the airbag body is first inflated in the airbag groove and then expanded to the outside of the airbag groove, which is beneficial to improving the force stability of the airbag seat and reducing the space occupied by the expansion component 3.

[0059] The embodiment of the present application provides a winding device, including a needle winding mechanism, which is the needle winding mechanism in the above embodiment. In this way, by controlling the movement of the moving member 5, the outer needle body 2 can be driven to move radially relative to the inner needle body 1 to achieve the adjustment of the outer circumference of the winding needle. The structure is simple and easy to operate. Moreover, the linear movement of the outer needle body 2 relative to the inner needle body 1 is controlled by the rotation of the rotating member 7, which is conducive to reducing power consumption.

[0060] It should be noted that "parallel" in this application means that one direction is parallel to another direction, but it is not limited to the absolute parallelism of the two. For example, one is close to parallel to the other, and it is defined here that the angle between close to parallel is less than 2 degrees. "Vertical" in this article means that one direction is perpendicular to another direction, but it is not limited to the absolute perpendicularity of the two. For example, one is close to perpendicular to the other, and it is defined here that the angle between close to perpendicular is less than 92 degrees and greater than 88 degrees.

[0061] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0062] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0063] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0064] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0065] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0066] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A needle winding mechanism, characterized in that: include: Install the base; The inner needle body and the outer needle body are arranged on the mounting base, and the outer needle body is located at the outer periphery of the inner needle body and can move along the radial direction of the inner needle body; A moving member is arranged on the mounting base, and the minimum angle between the moving direction of the moving member and the axial direction of the outer needle body is an acute angle; The connecting member is connected between the outer needle body and the moving member, and drives the outer needle body to move radially under the driving of the moving member.

2. The needle winding mechanism according to claim 1, characterized in that: One end of the connecting member is connected to one of the outer needle body and the moving member, and the other end moves in the other member along the axial direction of the outer needle body.

3. The needle winding mechanism according to claim 1, characterized in that: It includes a rotating member threadedly connected to the moving member, and the rotating member rotates to make the moving member move along the moving direction.

4. The needle winding mechanism according to claim 3, characterized in that: The moving member is a threaded rod, and the threaded rod includes an inclined portion that moves relative to the rotating member and an axial portion that moves relative to the connecting member.

5. The needle winding mechanism according to claim 3, characterized in that: The outer needle body, the connecting member and the moving member are all arranged in a plurality in the circumferential direction of the needle winding mechanism, and each of the outer needle body and each of the connecting members are arranged in a aligned manner in the axial direction, and each of the connecting members and each of the moving members are arranged in a aligned manner in the axial direction; The rotating member is threadedly connected to all the moving members to drive all the moving members to move.

6. The needle winding mechanism according to claim 3, characterized in that: It also includes a driving member that is transmission-connected to the rotating member, so that the rotating member rotates under the drive of the driving member.

7. The needle winding mechanism according to claim 6, characterized in that: A side of the driving member close to the rotating member is provided with an avoidance groove for avoiding the moving member, so that the moving member can move a greater distance along the moving direction.

8. The needle winding mechanism according to claim 1, characterized in that: An expansion component is arranged on the inner side of the inner needle body, and the expansion component can controllably expand and contract along the radial direction of the inner needle body so that the inner needle body can clamp the diaphragm.

9. The needle winding mechanism according to claim 8, characterized in that: The expansion assembly comprises: An airbag seat connected to the inner side of the inner needle body; The air bag body is arranged on a side of the air bag seat away from the inner needle body.

10. A winding device, characterized in that: It comprises the needle winding mechanism described in any one of claims 1 to 9.

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