Needle winding device and winding device

Abstract

The present application discloses a needle winding device and a winding device. The needle winding device includes an outer needle winding unit, an inner needle and a clamping drive assembly. The outer needle winding unit includes a first outer needle winding and a second outer needle winding. The inner needle is adjustably positioned between the first outer needle winding and the second outer needle winding. The clamping drive assembly drives the inner needle to move so that the inner needle abuts against the second outer needle winding. The needle winding device and the winding device provided by the present application have a simple structure and low production cost, and can meet the production of battery cells with small inner circumferences.

Description

Technical Field

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

[0002] The existing winding needle is divided into two inner needles and two outer needles. The two inner needles are arranged in the two outer needles facing each other. The push needles are pushed and retracted in the outer needles to make them open and close to clamp the film material.

[0003] The existing inner needle has a complex structure and needs to be set on the two outer needles respectively, which makes the processing of the two outer needles complicated, the production cost is high, and it cannot meet the production of battery cells with small inner circumferences, limiting the compatible range of battery cell sizes. Summary of the invention

[0004] The present application provides a needle winding device and a winding device, which have a simple structure and low production cost, and can meet the production requirements of battery cells with small inner circumferences.

[0005] In a first aspect, an embodiment of the present invention provides a needle winding device, comprising:

[0006] An outer curling needle unit, comprising a first outer curling needle and a second outer curling needle;

[0007] an inner needle, positionally adjustable between the first outer curling needle and the second outer curling needle; and

[0008] The clamping driving assembly drives the inner needle to move so that the inner needle abuts against the second outer winding needle.

[0009] In the above implementation process, the needle winding device has a simple structure and low manufacturing cost. When winding the film material, one end of the film material is passed between the first outer winding needle and the second outer winding needle, and the clamping drive assembly is started. The film material is abutted against the second outer winding needle through the inner needle to complete the clamping of the film material for subsequent processes; at the same time, compared with the prior art, the needle winding device clamps the film material with fewer structures, which can reduce the volume of the needle winding device, thereby improving the compatibility of the needle winding device, for example, it can adapt to battery cells with smaller inner circumferences.

[0010] In an optional embodiment, a groove is formed on the inner wall of the second outer curling needle;

[0011] The inner needle is engaged with the groove by the drive of the clamping drive assembly.

[0012] During the above-mentioned implementation process, when the film material is clamped, the inner needle will push the film material into the groove under the drive of the clamping drive assembly. The fit between the inner needle and the groove will stably fix the film material between the inner needle and the second outer winding needle, thereby ensuring the connection stability between the film material and the winding needle device. At the same time, since the film material is pushed into the groove, it is beneficial to the positioning of the film material, avoiding the deviation between the film material and the inner needle and the second outer winding needle, thereby ensuring the normal progress of subsequent processes.

[0013] In an optional embodiment, the inner needle is rotatably disposed between the first outer curling needle and the second outer curling needle.

[0014] In the above-mentioned implementation process, different from the prior art in which the position of the inner needle relative to the second outer winding needle is adjusted by linear motion, in the present solution, the inner needle is driven by the clamping drive assembly to rotate, thereby abutting against the second outer winding needle to achieve clamping of the membrane material. The position of the inner needle relative to the second outer winding needle is adjusted by rotational motion, which is conducive to the inner needle to smoothly and stably complete the clamping of the membrane material. At the same time, the inner needle will generate a hysteresis time in contact with the membrane material due to the rotational motion. During the hysteresis time, the inner needle can gradually complete the positioning of the membrane material to avoid the displacement of the membrane material and reduce the clamping effect.

[0015] In an optional embodiment, the clamping drive assembly includes a rotating shaft, a transmission assembly and a push-pin drive mechanism;

[0016] The outer needle winding unit is provided with a needle winding mounting seat, in which a rotating shaft is rotatably arranged and connected with the inner needle;

[0017] The push-pin driving mechanism drives the rotating shaft to rotate through the transmission assembly;

[0018] The transmission assembly includes a first transmission block, a second transmission block and a return spring;

[0019] The first transmission block is connected to the push pin of the push pin driving mechanism, and the first transmission block is formed with a push arc surface;

[0020] The second transmission block is connected to the rotating shaft, and the return spring is arranged between the second transmission block and the rotating shaft. The second transmission block is formed with a rotating arc surface to cooperate with the pushing arc surface;

[0021] When the first transmission block pushes the second transmission block, the pushing arc surface acts on the rotating arc surface, which drives the second transmission block to drive the rotating shaft to rotate.

[0022] During the above-mentioned implementation process, the clamping drive component has a simple structure and is easy to manufacture and assemble. At the same time, the push-pin drive mechanism is a common drive device in the needle winding device, which has low cost, is easy to obtain materials, and is conducive to the manufacture of the needle winding device. At the same time, the telescopic stroke of the push pin of the push-pin drive mechanism determines the movement stroke of the inner needle, which can ensure that the inner needle can make precise clamping actions and ensure that the inner needle can stably clamp the film material on the second outer winding needle. At the same time, it also ensures that the inner needle exerts appropriate force on the film material, thereby avoiding the situation where the inner needle causes damage to the film material due to excessive movement and excessive force.

[0023] In an optional embodiment, the inner needle is detachably connected to the rotating shaft.

[0024] In the above implementation process, the inner needle can be easily removed from the rotating shaft, which is convenient for replacement and maintenance of the inner needle; the inner needle can be replaced at any time to adapt to different membrane materials.

[0025] In an optional embodiment, the rotation axis extends between the first outer curling needle and the second outer curling needle;

[0026] A positioning structure is formed between the rotating shaft and the first outer curling needle and / or the second outer curling needle to lock the position of the rotating shaft relative to the first outer curling needle and the second outer curling needle.

[0027] During the above-mentioned implementation process, under the action of the positioning structure, the rotating shaft can maintain a certain relative position with the outer winding needle unit, whether it is in a stationary state or in a state where it is pushed by a push needle to rotate, to avoid the deviation of the rotating shaft, thereby ensuring that the inner needle moves along the correct motion trajectory and ensuring that the inner needle and the second outer winding needle can stably clamp the film material.

[0028] In an optional embodiment, the needle winding device further comprises a floating block, and the floating block is arranged on the inner needle and / or the groove.

[0029] During the above-mentioned implementation process, the floating block has three arrangement schemes, one is that the floating block is arranged on the inner needle; the second is that the floating block is arranged on the groove; the third is that both the inner needle and the groove are provided with floating blocks; the floating block plays a role in compensating the gap, when the inner needle pushes the film material into the groove, the floating block between the inner needle and the groove will be compressed as the inner needle and the groove fit together to fill the gap between the inner needle and the groove, ensuring good contact between the film material and the inner needle and the concave surface, which is conducive to the film material being firmly clamped by the inner needle and the second outer winding needle.

[0030] In an optional embodiment, the floating block includes a floating member, a compression spring and a screw;

[0031] The floating member is elastically fixed to the inner needle and / or the groove by means of a compression spring and a screw.

[0032] In the above-mentioned implementation process, a specific component structure of a floating block is provided, which has a simple structure, is easy to install, and has a low manufacturing cost; when the inner needle pushes the film material into the groove, the film material will contact the floating part, and with the further movement of the inner needle, the compression spring will be compressed, and the floating part will fill the gap between the inner needle and the groove to ensure that the film material has good contact with the inner needle and the concave surface; after the thrust of the inner needle on the film material is cancelled, the floating part will be reset under the action of the compression spring, and at the same time, the elastic force will be transmitted to the film material, which is conducive to the removal of the film material from the winding needle device.

[0033] In an optional embodiment, the first outer curling needle is formed with a receiving groove;

[0034] The inner needle has a specific first position and a second position;

[0035] The first position is that the inner needle is accommodated in the accommodation groove;

[0036] The second position is when the inner needle abuts against the second outer needle;

[0037] The clamping drive assembly drives the inner needle to switch between a first position and a second position.

[0038] During the above-mentioned implementation process, when the film material has not passed through the first outer winding needle and the second outer winding needle, the inner needle is in the first position and can be regarded as integrated with the first outer winding needle. At this time, when one end of the film material passes through the first outer winding needle and the second outer winding needle, it can be accurately located between the second outer winding needle and the inner needle without spending extra effort or using additional equipment to calibrate the position of the film material relative to the winding needle device. Subsequently, the clamping drive assembly is started, and the inner needle switches from the first position to the second position, thereby accurately completing the clamping of the film material. At the same time, when the film material needs to be removed, the clamping drive assembly is started, and the inner needle will not contact the film material again during the process of returning from the second position to the first position, thereby ensuring the quality of the film material and avoiding damage to the film material by the inner needle. Furthermore, since the inner needle can be in the first position, the structure of the winding needle device can be made more compact, the volume of the winding needle device can be further reduced, and the compatibility of the winding needle device can be further improved.

[0039] In a second aspect, an embodiment of the present invention provides a winding device, comprising:

[0040] a winding needle drive assembly; and

[0041] The needle winding device of any of the preceding embodiments;

[0042] The needle winding drive assembly drives the outer needle winding unit to rotate.

[0043] During the above-mentioned implementation process, through the direct fit between the inner winding needle and the outer winding needle unit, the clamping part of the film material is lower than the plane of the outer needle, that is, it is in the groove, which is different from the existing two inner needles that clamp the film material, which is located on the plane of the outer winding needle or higher than the plane of the outer winding needle. It can achieve a more stable clamping of the film material; at the same time, compared with the existing technology, the winding needle device achieves the clamping of the film material with fewer structures, simplifies unnecessary functional parts, reduces manufacturing costs, and because the winding needle device is small in size, it can improve the compatibility of the winding device, and can wind a winding piece with a small inner circumference. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 is a three-dimensional diagram of the needle winding device in this embodiment at a viewing angle;

[0046] Figure 2 is a three-dimensional diagram of the needle winding device in this embodiment from another viewing angle;

[0047] Figure 3 is a three-dimensional schematic diagram of the inner needle and outer winding needle unit in this embodiment;

[0048] Figure 4 is a three-dimensional schematic diagram of the inner needle and the second outer curling needle in this embodiment;

[0049] Figure 5 is a three-dimensional schematic diagram of the second outer curling needle in this embodiment;

[0050] Figure 6 Schematic diagram of the internal structure of the floating member in this embodiment;

[0051] Figure 7 is a schematic diagram of the inner needle in the first position in this embodiment;

[0052] Figure 8 is a schematic diagram of the inner needle in the second position in this embodiment;

[0053] Fig. 9 Schematic diagram of the inner needle and outer winding needle unit in other embodiments.

[0054] Icons: 10-external winding needle unit; 11-inner needle; 12-clamping drive assembly; 13-first external winding needle; 14-second external winding needle; 15-groove; 16-floating block; 17-floating piece; 18-mounting hole; 19-rotating shaft; 20-transmission assembly; 30-push needle drive mechanism; 30a-push needle; 31-first transmission block; 32-second transmission block; 33-reset spring; 34-push arc surface; 35-rotating arc surface; 36-winding needle mounting seat; 37-screw hole; 38-accommodating groove; 39-winding needle drive assembly. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0057] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0058] In the description of the embodiments of the present application, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0059] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0061] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0062] The present embodiment provides a needle winding device, which has a simple structure and low production cost, and can meet the production requirements of battery cells with small inner circumferences.

[0063] See also Figure 1-Figure 5 , Figure 1 is a three-dimensional diagram of the needle winding device in this embodiment at a certain viewing angle. Figure 2 is a three-dimensional diagram of the needle winding device in this embodiment from another viewing angle. Figure 3 is a three-dimensional schematic diagram of the inner needle 11 and the outer winding needle unit 10 in this embodiment, Figure 4 is a three-dimensional schematic diagram of the inner needle 11 and the second outer curling needle 14 in this embodiment, Figure 5 Schematic diagram of the second outer curling needle 14 in this embodiment.

[0064] The needle winding device comprises an outer needle winding unit 10 , an inner needle 11 and a clamping drive assembly 12 .

[0065] The outer needle unit 10 includes a first outer needle 13 and a second outer needle 14. The inner needle 11 is adjustably disposed between the first outer needle 13 and the second outer needle 14. The clamping drive assembly 12 drives the inner needle 11 to move so that the inner needle 11 abuts against the second outer needle 14.

[0066] In the above implementation process, the winding needle device has a simple structure and low manufacturing cost. When winding the film material, one end of the film material is passed between the first outer winding needle 13 and the second outer winding needle 14, and the clamping drive assembly 12 is started. The film material is abutted against the second outer winding needle 14 through the inner needle 11 to complete the clamping of the film material for subsequent processes; at the same time, compared with the prior art, the winding needle device clamps the film material with fewer structures, which can reduce the volume of the winding needle device, thereby improving the compatibility of the winding needle device, for example, it can adapt to battery cells with smaller inner circumferences.

[0067] In the present disclosure, a groove 15 is formed on the inner wall of the second outer curling needle 14 .

[0068] The inner needle 11 is driven by the clamping drive assembly 12 to fit into the groove 15 .

[0069] During the above-mentioned implementation process, when the film material is clamped, the inner needle 11, driven by the clamping drive assembly 12, will push the film material into the groove 15. The fit between the inner needle 11 and the groove 15 will stably fix the film material between the inner needle 11 and the second outer winding needle 14, thereby ensuring the connection stability between the film material and the winding needle device. At the same time, since the film material is pushed into the groove 15, it is beneficial to the positioning of the film material, avoiding the deviation between the film material and the inner needle 11 and the second outer winding needle 14, thereby ensuring the normal progress of subsequent processes.

[0070] It should be noted that, optionally, the needle winding device further includes a floating block 16 , and the floating block 16 is disposed on the inner needle 11 and / or the groove 15 .

[0071] During the above-mentioned implementation process, the floating block 16 has three arrangement schemes, one is that the floating block 16 is arranged on the inner needle 11; the second is that the floating block 16 is arranged on the groove 15; the third is that both the inner needle 11 and the groove 15 are provided with floating blocks 16; the floating block 16 plays a role in compensating the gap. When the inner needle 11 pushes the film material into the groove 15, the floating block 16 between the inner needle 11 and the groove 15 will be compressed as the inner needle 11 and the groove 15 fit together to fill the gap between the inner needle 11 and the groove 15, ensuring that the film material has good contact with the inner needle 11 and the concave surface, which is conducive to the film material being firmly clamped by the inner needle 11 and the second outer winding needle 14.

[0072] Optionally, the floating block 16 includes a floating member 17, a compression spring and a screw. Figure 6 , Figure 6 Schematic diagram of the internal structure of the floating member 17 in this embodiment.

[0073] The floating member 17 is elastically fixed to the inner needle 11 and / or the groove 15 by means of a compression spring and a screw.

[0074] exist Figure 6 It can be seen that the floating member 17 is formed with two mounting holes 18, and the compression spring can be arranged in the mounting hole 18 and stably fixed to the inner needle 11 and / or the groove 15 by screws.

[0075] In the above-mentioned implementation process, a specific component structure of a floating block 16 is provided, which has a simple structure, is easy to install, and has a low manufacturing cost; when the inner needle 11 pushes the film material into the groove 15, the film material will contact the floating member 17. As the inner needle 11 moves further, the compression spring will be compressed, and the floating member 17 will fill the gap between the inner needle 11 and the groove 15 to ensure that the film material has good contact with the inner needle 11 and the concave surface; after the thrust of the inner needle 11 on the film material is cancelled, the floating member 17 will be reset under the action of the compression spring, and at the same time, the elastic force will be transmitted to the film material, which is conducive to the removal of the film material from the winding needle device.

[0076] It should be noted that, in the present disclosure, the floating block 16 is arranged on the surface of the groove 15, which is beneficial to reducing the weight of the inner needle 11 and reducing the compliance of the clamping drive assembly 12. In one possible implementation method, a groove-like structure is also recessed in the surface of the groove 15, and the floating block 16 is embedded in the groove-like structure to ensure that the needle winding device has a compact structure; at the same time, the floating member 17 will be slightly convex from the surface of the groove 15 through the elastic force of the compression spring, thereby providing sufficient support for the inner needle 11 and the membrane material, so as to ensure that the membrane material is stably clamped.

[0077] It should be noted that in the present disclosure, the number of floating blocks 16 is three, and the three floating blocks 16 are arranged at intervals along the length direction of the groove; providing multiple floating blocks 16 is beneficial to improving the clamping stability of the inner needle 11 and the second outer winding needle 14 on the film material.

[0078] In this embodiment, the inner needle 11 is rotatably disposed between the first outer winding needle 13 and the second outer winding needle 14 .

[0079] See also Figure 7 and Figure 8 , Figure 7 and Figure 8 Schematic diagram of the trajectory of the inner needle 11 rotating between the first outer winding needle 13 and the second outer winding needle 14 in this embodiment.

[0080] In the above-mentioned implementation process, different from the prior art in which the position of the inner needle 11 relative to the second outer winding needle 14 is adjusted by linear motion, in this solution, the inner needle 11 is driven by the clamping drive assembly 12 to rotate, thereby abutting against the second outer winding needle 14 to achieve clamping of the membrane material. The position of the inner needle 11 relative to the second outer winding needle 14 is adjusted by rotational motion, which is conducive to the inner needle 11 to smoothly and stably complete the clamping of the membrane material. At the same time, the inner needle 11 will generate a hysteresis time in contact with the membrane material due to the rotational motion. During the hysteresis time, the inner needle 11 can gradually complete the positioning of the membrane material to avoid the displacement of the membrane material and reduce the clamping effect.

[0081] Please see again Figure 1Combined with Figure 4 In the present disclosure, the clamping drive assembly 12 includes a rotating shaft 19 , a transmission assembly 20 and a push-pin drive mechanism 30 .

[0082] The outer needle winding unit 10 is provided with a needle winding mounting seat 36, in which the rotating shaft 19 is rotatably disposed and connected to the inner needle 11. The needle pushing driving mechanism 30 drives the rotating shaft 19 to rotate through the transmission assembly 20.

[0083] The transmission assembly 20 includes a first transmission block 31 , a second transmission block 32 and a return spring 33 .

[0084] The first transmission block 31 is connected to the push pin 30a of the push pin driving mechanism 30, and the first transmission block 31 is formed with a push arc surface 34. The second transmission block 32 is connected to the rotating shaft 19, and the return spring 33 is arranged between the second transmission block 32 and the rotating shaft 19, and the second transmission block 32 is formed with a rotating arc surface 35 to cooperate with the push arc surface 34.

[0085] When the first transmission block 31 pushes the second transmission block 32 , the pushing arc surface 34 acts on the rotating arc surface 35 , which drives the second transmission block 32 to drive the rotating shaft 19 to rotate.

[0086] In the above-mentioned implementation process, the clamping drive component 12 has a simple structure and is easy to manufacture and assemble. At the same time, the push-pin drive mechanism 30 is a common drive device in the needle winding device, which has low cost, is easy to obtain materials, and is conducive to the manufacture of the needle winding device; at the same time, the telescopic stroke of the push pin of the push-pin drive mechanism 30 determines the movement stroke of the inner needle 11, which can ensure that the inner needle 11 can make precise clamping actions, and ensure that the inner needle 11 can stably clamp the membrane material on the second outer winding needle 14. At the same time, it also ensures that the inner needle 11 exerts appropriate force on the membrane material, avoiding the situation where the inner needle 11 causes damage to the membrane material due to excessive movement and excessive force.

[0087] It should be noted that see Fig. 9 In other specific embodiments, different from the technical solution described above in which the inner needle 11 is rotatably arranged between the first outer needle 13 and the second outer needle 14, Fig. 9 In the technical solution shown, the inner needle 11 can be raised and lowered (opened and closed) in a linear motion trajectory through the telescopic movement of the push needle as in the prior art, and can also cooperate with the second outer winding needle 14 to clamp the film material.

[0088] In the present disclosure, the inner needle 11 is detachably connected to the rotating shaft 19 .

[0089] It should be noted that the inner needle 11 and the rotating shaft 19 can be connected in a detachable manner by connecting members including but not limited to screws, pins, bolts, etc. Figure 4 and Figure 5 It can be seen that two screw holes 37 are formed on the wall surface of the inner needle 11 to facilitate connection with the rotating shaft 19 via screws.

[0090] In the above implementation process, the inner needle 11 can be easily removed from the rotating shaft 19, which is convenient for replacement and maintenance of the inner needle 11; the inner needle 11 can be replaced at any time to adapt to different membrane materials.

[0091] It should be noted that, in other specific embodiments, the inner needle 11 and the rotating shaft 19 may also be an integral structure.

[0092] In the present disclosure, the rotating shaft 19 extends between the first outer curling needle 13 and the second outer curling needle 14, and a positioning structure is formed between the rotating shaft 19 and the first outer curling needle 13 and / or the second outer curling needle 14 to lock the position of the rotating shaft 19 relative to the first outer curling needle 13 and the second outer curling needle 14.

[0093] Among them, the positioning structure includes but is not limited to positioning bearings, limiting concave-convex structures, etc., which can ensure that the rotating shaft 19 always maintains a relative position with the first outer winding needle 13 and the second outer winding needle 14.

[0094] Among them, when the positioning structure is a limiting concave-convex structure, in one possible implementation method, the limiting concave-convex structure includes a groove 15 formed on the circumferential surface of the rotating shaft 19, and a protrusion formed on the inner wall of the first outer winding needle 13 and / or the second outer winding needle 14. The protrusion will be embedded in the groove 15 to ensure that the rotating shaft 19 will not deviate toward the first outer winding needle 13 or the second outer winding needle 14.

[0095] During the above-mentioned implementation process, under the action of the positioning structure, the rotating shaft 19 can maintain a certain relative position with the outer winding needle unit 10, whether it is in a stationary state or in a state where it is pushed by a push needle to rotate, to avoid the rotation shaft 19 from being offset, thereby ensuring that the inner needle 11 moves along the correct motion trajectory and ensuring that the inner needle 11 and the second outer winding needle 14 can stably clamp the film material.

[0096] In this disclosure, please refer to Figure 7 and Figure 8 .

[0097] The first outer winding needle 13 is formed with a receiving groove 38 .

[0098] The inner needle 11 has a first position and a second position. Figure 7 , the inner needle 11 is in the first position; Figure 8 , the inner needle 11 is in the second position.

[0099] The first position is that the inner needle 11 is accommodated in the accommodating groove 38, and the second position is that the inner needle 11 abuts against the second outer winding needle 14. The clamping drive assembly 12 drives the inner needle 11 to switch between the first position and the second position.

[0100] During the above-mentioned implementation process, when the film material has not passed through the first outer winding needle 13 and the second outer winding needle 14, the inner needle 11 is in the first position and can be regarded as integrated with the first outer winding needle 13. At this time, when one end of the film material passes through the first outer winding needle 13 and the second outer winding needle 14, it can be accurately located between the second outer winding needle 14 and the inner needle 11 without spending extra effort or using additional equipment to calibrate the position of the film material relative to the needle winding device. Subsequently, the clamping drive assembly 12 is started, and the inner needle 11 switches from the first position to the second position, thereby accurately completing the clamping of the film material. At the same time, when the film material needs to be removed, the clamping drive assembly 12 is started, and the inner needle 11 will not contact the film material again during the process of returning from the second position to the first position, thereby ensuring the quality of the film material and preventing the inner needle 11 from causing damage to the film material. Furthermore, since the inner needle 11 can be in the first position, the structure of the needle winding device can be made more compact, the volume of the needle winding device can be further reduced, and the compatibility of the needle winding device can be further improved.

[0101] It should be noted that, see Figure 1 The present disclosure further provides a winding device, including a winding needle driving assembly 39 and the winding needle device described above, wherein the winding needle driving assembly 39 drives the outer winding needle unit 10 to rotate.

[0102] In the above implementation process, the winding needle device works to clamp the film material, and the outer winding needle unit 10 is driven by the winding needle driving assembly 39 to wind the film material. The winding device has a simple structure and low manufacturing cost, which can effectively reduce the production cost. At the same time, since the winding needle device is small in size, the compatibility of the winding device can be improved, and a winding piece with a small inner circumference can be wound.

[0103] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A needle winding device for winding film materials, characterized in that: include: The outer curling needle unit comprises a first outer curling needle and a second outer curling needle, wherein the first outer curling needle is formed with a receiving groove; An inner needle is adjustably disposed between the first outer needle and the second outer needle; the inner needle has a first position and a second position; the first position is that the inner needle is accommodated in the accommodation groove; the second position is that the inner needle abuts against the second outer needle; as well as A clamping drive assembly, wherein the clamping drive assembly drives the inner needle to switch between the first position and the second position; Among them, when the inner needle is in the first position, one end of the film material passes through the first outer winding needle and the second outer winding needle, and by starting the clamping drive component, the inner needle is switched from the first position to the second position to complete the clamping of the film material.

2. The needle winding device according to claim 1, characterized in that: The inner wall of the second outer curling needle is formed with a groove; The inner needle is driven by the clamping drive assembly to fit into the groove.

3. The needle winding device according to claim 1, characterized in that: The inner needle is rotatably disposed between the first outer curling needle and the second outer curling needle.

4. The needle winding device according to claim 3, characterized in that: The clamping drive assembly includes a rotating shaft, a transmission assembly and a push-pin drive mechanism; The outer needle winding unit is provided with a needle winding mounting seat, the rotating shaft is rotatably arranged in the needle winding mounting seat and connected with the inner needle; The push-pin driving mechanism drives the rotating shaft to rotate through the transmission assembly; The transmission assembly comprises a first transmission block, a second transmission block and a return spring; The first transmission block is connected to the push pin of the push pin driving mechanism, and the first transmission block is formed with a push arc surface; The second transmission block is connected to the rotating shaft, and the return spring is arranged between the second transmission block and the rotating shaft. The second transmission block is formed with a rotating arc surface to cooperate with the pushing arc surface; When the first transmission block pushes the second transmission block, the pushing arc surface acts on the rotating arc surface, which drives the second transmission block to drive the rotating shaft to rotate.

5. The needle winding device according to claim 4, characterized in that: The inner needle is detachably connected to the rotating shaft.

6. The needle winding device according to claim 5, characterized in that: The rotating shaft extends between the first outer curling needle and the second outer curling needle; A positioning structure is formed between the rotating shaft and the first outer curling needle and / or the second outer curling needle to lock the position of the rotating shaft relative to the first outer curling needle and the second outer curling needle.

7. The needle winding device according to claim 2, characterized in that: The needle winding device further comprises a floating block, and the floating block is arranged on the inner needle and / or the groove.

8. The needle winding device according to claim 7, characterized in that: The floating block includes a floating member, a compression spring and a screw; The floating member is elastically fixed to the inner needle and / or the groove by means of a compression spring and a screw.

9. A winding device, characterized in that: include: Winding needle drive assembly; as well as The needle winding device according to any one of claims 1 to 8; The winding needle driving assembly drives the outer winding needle unit to rotate.

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