Rotary clamp type winding needle and winding apparatus

Abstract

The application relates to a rotary clamping type winding needle and a winding device, the rotary clamping type winding needle comprising a first winding needle, a second winding needle which is arranged to slide close to or away from the first winding needle, a clamping structure which comprises a driving structure, the driving structure being movably connected to the first winding needle, the driving structure being used for abutting and pushing the second winding needle away from the first winding needle, and a transmission mechanism which is in transmission connection with the driving structure. The application sets the clamping structure, uses the driving structure arranged on the first winding needle to push the second winding needle away from the first winding needle and clamp the material belt, so that a gap is generated between the first winding needle and the second winding needle, the first winding needle and the second winding needle can be closed when the needle is pulled out, a needle pulling gap can be left, the needle pulling process is not easy to cause the core of the battery to be pulled out, the powder to be dropped and other adverse phenomena.

Description

Technical Field

[0001] This application relates to the field of needle winding technology, and in particular to a rotary clamping needle winding device and winding equipment. Background Technology

[0002] Currently, winding is a crucial step in battery production and processing. It involves placing the material strip on a winding needle, which then winds the strip as the needle rotates to form a battery cell.

[0003] In related technologies, the split-type winding needle design uses two separate winding needles to clamp the material strip, so as to fix the ends of the diaphragm and electrode. During the subsequent winding process, the material strip is less likely to move relative to the winding needle, thus the winding is tighter and the winding effect is better.

[0004] After winding, the material strip is tightly wrapped around the winding needle and clamped between two separate winding needles, making it difficult to pull the winding needle out of the formed battery cell. Furthermore, pulling the needle can easily cause defects such as battery cell pull-out and powder shedding. Summary of the Invention

[0005] This application provides a rotary clamping needle winding device to solve the technical problems in the related art that easily cause problems such as battery cell pull-out and powder shedding when pulling out needles.

[0006] In a first aspect, a rotary clamping needle winding device is provided, comprising:

[0007] First roll of needles;

[0008] The second coil of needles is slidably positioned close to or away from the first coil of needles;

[0009] A clamping structure includes an active structure movably connected to the first coil needle, the active structure being used to press against and push the second coil needle away from the first coil needle;

[0010] A transmission mechanism that is connected to the active structure in a transmission manner.

[0011] In some embodiments, the rotary clamping needle further includes multiple elastic elements, the two ends of which are connected to the first needle and the second needle, respectively.

[0012] In some embodiments, the active structure is rotatably disposed on the first coil needle.

[0013] In some embodiments, the clamping structure further includes a mating structure disposed on the second coil needle, the mating structure including a clamping surface for the active structure to overlap.

[0014] In some embodiments, the mating structure includes a mating groove, the bottom of which is abutted by the active structure, and one wall of the mating groove is the clamping surface.

[0015] In some embodiments, the active structure includes an active plate and a rolling element, the active plate being rotatably connected to the first winding needle, and the rolling element being rotatably connected to the active plate and used to abut against the clamping surface.

[0016] In some embodiments, the transmission mechanism includes a rotating assembly, the rotating assembly comprising:

[0017] Mounting rack;

[0018] A rotating shaft is rotatably connected to the mounting bracket, and the rotating shaft is also connected to the active structure via a transmission.

[0019] A rotary transmission component is connected to the rotating shaft to drive the rotating shaft to rotate.

[0020] In some embodiments, the rotary transmission component includes: a force-applying component that is slidably disposed along the axis of the rotating shaft, the rotating shaft having a force-applying groove on its circumferential side, the force-applying groove being coiled around the rotating shaft, and the force-applying component being inserted into and slidably disposed in the force-applying groove.

[0021] In some embodiments, the rotary transmission component further includes a return frame and a return elastic element, the return frame being connected to the first winding needle, and the two ends of the return elastic element being connected to the force-applying component and the return frame, respectively.

[0022] In some embodiments, the transmission mechanism further includes a pusher for connecting to an external linear module and for pushing the force-applying element to slide.

[0023] In some embodiments, the transmission mechanism includes a pusher for connecting to an external linear module and for insertion between the active structure and the first winding needle.

[0024] In some embodiments, the rotary clamping needle further includes a mating member connected to the second needle, and the front end of the pusher is wedge-shaped, the pusher being used to abut against and push the mating member and the second needle away from the first needle.

[0025] In some embodiments, the active structure is slidably disposed on the first winding needle.

[0026] In some embodiments, the rotary clamping needle coil also includes a needle seat, which includes a first needle seat and a second needle seat. The first needle coil is fixed to the first needle seat, the second needle coil is fixed to the second needle seat, and the second needle seat is slidably disposed near or away from the first needle seat.

[0027] The beneficial effects of the technical solution provided in this application include:

[0028] This application provides a rotary clamping winding needle. Due to the active structure, after the material strip passes between the first and second winding needles, the transmission mechanism drives the active structure to move. The active structure moves towards the second winding needle, pressing the material strip against the second winding needle while simultaneously pushing the second winding needle away from the first winding needle. This clamps the material strip while separating the first and second winding needles. After winding is complete, the active structure returns to its original position to release the clamped material strip. The active structure no longer separates the first and second winding needles, allowing the second winding needle to approach the first winding needle. This releases the battery cell from the tight grip of the first and second winding needles, reducing friction between the battery cell and the first and second winding needles. This facilitates the removal of the first and second winding needles, and the removal process is less likely to cause defects such as battery cell pull-out or powder shedding.

[0029] Secondly, a winding device is provided, including a rotary clamping needle as described above.

[0030] Another embodiment of this application provides a winding device that includes the aforementioned rotary clamping needle. Therefore, the beneficial effects of this winding device are the same as those of the aforementioned rotary clamping needle, and will not be repeated here. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall rotary clamping needle provided in the embodiments of this application;

[0033] Figure 2 Exploded view of the first and second coils of needles provided for embodiments of this application;

[0034] Figure 3 Exploded view of the first and second spools of needles provided in the embodiments of this application.

[0035] Figure 4A schematic diagram illustrating the removal of the first and second coils of needles as provided in the embodiments of this application;

[0036] Figure 5 A schematic diagram illustrating the winding of the first and second coils of needles as provided in an embodiment of this application;

[0037] Figure 6 This is an internal schematic diagram of the first needle holder provided in an embodiment of this application;

[0038] Figure 7 This is a schematic diagram of a rotary transmission component provided in an embodiment of this application.

[0039] In the diagram: 1. First coil of needles; 11. Mounting groove; 2. Second coil of needles; 3. Clamping structure; 31. Active structure; 32. Mating structure; 32a. Clamping surface; 4. Transmission mechanism; 41. Rotating assembly; 411. Mounting bracket; 412. Rotating shaft; 412a. Force application groove; 413. Rotary transmission component; 4131. Force application component; 4131a. Force application block; 4131b. Force application bearing; 4132. Return frame; 4133. Return elastic component; 414. Gear set; 42. Pushing component; 5. Needle holder; 51. First needle holder; 52. Second needle holder; 6. Elastic component; 7. Mating component. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] This application provides a rotary clamping needle winding device. The rotary clamping needle winding device uses a clamping structure and an active structure on the first needle winding to push the second needle away from the first needle winding and clamp the material strip, creating a gap between the first and second needle windings. Therefore, when the needle is pulled out, the first and second needle windings close together, leaving a gap for easy needle removal. This application solves the technical problem in related technologies where needle removal easily causes problems such as cell pull-out and powder shedding.

[0042] Reference Figures 1-5A rotary clamping needle coil includes a needle holder 5, a first needle coil 1, a second needle coil 2, a clamping structure 3, and a transmission mechanism 4. The needle holder 5 includes a first needle holder 51 and a second needle holder 52. The first needle coil 1 is fixed to the first needle holder 51, and the second needle coil 2 is fixed to the second needle holder 52. The second needle holder 52 is slidably disposed near or away from the first needle holder 51, allowing the second needle coil 2 to slide near or away from the first needle coil 1. During winding, the end of the strip is inserted between the first needle coil 1 and the second needle coil 2, and then clamped by the clamping structure 3.

[0043] Reference Figure 3 Specifically, the first needle holder 51 has multiple guide rods fixed inside, and the second needle holder 52 is sleeved on the guide rods and slides on the guide rods to ensure the stability and consistency of the movement of the second coil needle 2.

[0044] Reference Figure 3 and Figure 6 The rotary clamping needle coil also includes multiple elastic elements 6. The two ends of each elastic element 6 are connected to the first needle coil 1 and the second needle coil 2, respectively. In this embodiment, one end of the elastic element 6 is fixed to the second needle coil 2, and the other end is fixed to the first needle holder 51. The elastic force of the elastic element 6 keeps the first needle coil 1 and the second needle coil 2 in a close proximity state. Preferably, referring to… Figure 4 When the second needle coil 2 is not subjected to external force, a material threading gap is left between the second needle coil 2 and the first needle coil 1. In this embodiment, the elastic element 6 includes a spring.

[0045] Reference Figures 2-5 The clamping structure 3 includes an active structure 31, which is movably connected to the first needle roll 1 and located between the first needle roll 1 and the second needle roll 2. The transmission mechanism 4 is driven by the active structure 31, causing it to press against and push the second needle roll 2 away from the first needle roll 1, thus overcoming the elastic force of the elastic element 6. Before pushing the second needle roll 2, the active structure 31 first presses the material strip onto the second needle roll 2, and then pushes the second needle roll 2 to move.

[0046] Understandably, referring to Figure 5 Before winding, the active structure 31, on the one hand, cooperates with the second winding needle 2 to clamp the material strip, and on the other hand, pushes the second winding needle 2 away from the first winding needle 1. (Refer to...) Figure 4When the needle is pulled out, the active structure 31 returns to its original position and no longer presses against the material strip. The second coil needle 2, under the action of the elastic element 6, moves closer to the first coil needle 1. In some embodiments, if the elastic element 6 is not provided, the second coil needle 2 can also be manually moved closer to the first coil needle 1. After the second coil needle 2 moves closer to the first coil needle 1, on the one hand, the material strip is not clamped, and on the other hand, the battery cell is released from the tight wrapping state of the first coil needle 1 and the second coil needle 2, reducing the friction between the battery cell and the first coil needle 1 and the second coil needle 2, making it easier to pull out the first coil needle 1 and the second coil needle 2. The pulling out process is less likely to cause defects such as battery cell pulling out or powder shedding.

[0047] Reference Figures 2-5 Furthermore, the clamping structure 3 also includes a mating structure 32, which is disposed on the second needle coil 2 and located on the side of the second needle coil 2 facing the first needle coil 1. The mating structure 32 includes a clamping surface 32a, which is used for the active structure 31 to overlap. On the one hand, the strip is clamped between the active structure 31 and the second needle coil 2; on the other hand, the strip is also clamped between the clamping surface 32a of the mating structure 32 and the active structure 31, so that the strip is clamped more stably.

[0048] Reference Figures 2-5 Specifically, in this embodiment, the mating structure 32 includes a mating groove, which is formed on the side of the second coil needle 2 facing the first coil needle 1, and the length direction of the mating groove is consistent with the length direction of the second coil needle 2. One wall of the mating groove is a clamping surface 32a. The active structure 31 pushes the bottom of the mating groove to move the second coil needle 2 away from the first coil needle 1. After the second coil needle 2 moves away from the first coil needle 1, the active structure 31 overlaps on the clamping surface 32a. Therefore, the active structure 31 and the bottom and wall of the mating groove clamp the material strip, resulting in a better clamping effect.

[0049] In other embodiments, the mating structure 32 may further include a mating plate, which is fixed to the side of the second winding needle 2 facing the first winding needle 1, and the active structure 31 overlaps the mating plate. The active structure 31, the second winding needle 2, and the mating plate all clamp the material strip, resulting in a better clamping effect on the material strip.

[0050] Reference Figures 2-5 In this embodiment, the active structure 31 is rotatably connected to the first winding needle 1. Preferably, the first winding needle 1 has a mounting groove 11 on its side facing the second winding needle 2. The active structure 31 is rotatably connected to the bottom of the mounting groove 11. The rotation axis of the active structure 31 is parallel to the axis of the first winding needle 1. When the active structure 31 rotates, a part of the active structure 31 extends out of the mounting groove 11 and abuts against the second winding needle 2 to clamp the material strip and push the second winding needle 2 away from the first winding needle 1.

[0051] Reference Figures 2-5In this embodiment, the active structure 31 includes an active plate, which is rotatably mounted on the first winding needle 1. The length direction of the active plate is consistent with the length direction of the first winding needle 1. As the active plate rotates, it presses the material strip against the second winding needle 2.

[0052] Furthermore, the active structure 31 also includes rolling elements, and multiple rolling elements can be provided. The rolling elements are rotatably mounted on the active plate, and the rolling elements replace the active plate in contacting the second winding needle 2. When pushing the second winding needle 2, the rolling elements roll on the second winding needle 2 and push the second winding needle 2, reducing the friction between the second winding needle 2 and the active plate.

[0053] Reference Figure 6 and Figure 7 The transmission mechanism 4 includes a rotating assembly 41, which comprises a mounting bracket 411, a rotating shaft 412, and a rotating transmission component 413. The mounting bracket 411 is bolted to the first pin seat 51. The rotating shaft 412 is rotatably connected to the mounting bracket 411 and is also drive-connected to the active structure 31. In this embodiment, the rotating assembly 41 further includes a gear set 414, through which the rotating shaft 412 is drive-connected to the active structure 31, thus allowing for a reasonable positioning of the rotating shaft 412. The rotating transmission component 413 is drive-connected to the rotating shaft 412, enabling the rotating shaft 412 and the active structure 31 to rotate.

[0054] Reference Figure 6 and Figure 7 In this embodiment, the rotary transmission component 413 includes a force-applying component 4131, which is slidably mounted on the first needle seat 51 via a guide rail assembly. The sliding direction of the force-applying component 4131 is consistent with the length direction of the rotating shaft 412. A force-applying groove 412a is provided on the circumferential side of the rotating shaft 412, and the force-applying groove 412a is spirally wound around the rotating shaft 412. In this embodiment, the central angles at both ends of the force-applying groove 412a are 90 degrees. The force-applying component 4131 extends into the force-applying groove 412a and is slidably mounted thereon. Therefore, by driving the force-applying component 4131 to slide, the force-applying component 4131 drives the rotating shaft 412 to rotate by pushing against the groove wall of the force-applying groove 412a, thereby causing the active structure 31 to rotate.

[0055] Reference Figure 6 and Figure 7 Specifically, the force-applying component 4131 includes a force-applying block 4131a and a force-applying bearing 4131b. The force-applying block 4131a is slidably mounted on the first needle seat 51 via a guide rail assembly. The force-applying bearing 4131b is rotatably connected to the force-applying block 4131a and extends into the force-applying groove 412a. The force-applying bearing 4131b rolls within the force-applying groove 412a to more easily drive the rotating shaft 412 to rotate.

[0056] Reference Figure 6 and Figure 7 The rotary transmission component 413 further includes a return frame 4132 and a return spring. The return frame 4132 is fixed to the first needle seat 51 by bolts. The two ends of the return elastic element 4133 are connected to the return frame 4132 and the force-applying component 4131, respectively. In this embodiment, when the force-applying component 4131 slides and drives the active structure 31 to rotate to push the second coil needle 2 away from the first coil needle 1, the return elastic element 4133 deforms. When the active structure 31 needs to return, the return elastic element 4133 drives the force-applying component 4131 to slide and drive the active structure 31 to return. Multiple return elastic elements 4133 are provided, and in this embodiment, the return elastic element 4133 includes a return spring.

[0057] Reference Figure 6 and Figure 7 The transmission mechanism 4 further includes a pusher 42, which passes through the first needle seat 51 and is used to push the force-applying component 4131. The pusher 42 is driven by an external linear module to move, thereby pushing the force-applying component 4131. In this embodiment, the pusher 42 includes a push rod.

[0058] Reference Figure 2 and Figure 6 Furthermore, the rotary clamping needle coil also includes a mating component 7, which is connected to the second needle holder 52. The front end of the pushing component 42 is wedge-shaped, and the side of the front end of the pushing component 42 contacts the mating component 7. As the pushing component 42 is inserted into the first needle holder 51, on the one hand, the pushing component 42 pushes the force-applying component 4131, causing the active structure 31 to rotate; on the other hand, the pushing component 42 can push the mating component 7, causing the second needle coil 2 to move away from the first needle coil 1, thereby assisting the active structure 31 in pushing the second needle coil 2. It should be noted that, preferably, when the pushing component 42 pushes the mating component 7 to move the second needle coil 2 away from the first needle coil 1, the active structure 31 always keeps the strip pressed against the second needle coil 2. In this embodiment, the mating component 7 includes a mating bearing.

[0059] In other embodiments, the transmission mechanism 4 may consist only of a pusher 42, which is wedge-shaped and passes through the first needle holder 51. The pusher 42 extends between the active structure 31 and the first coiled needle 1 to push the active structure 31 to rotate. Further, a torsion spring is provided between the active structure 31 and the first coiled needle 1. The pusher 42 extends between the active structure 31 and the first coiled needle 1 to overcome the spring force of the torsion spring and drive the active structure 31 to rotate, thereby pushing the second coiled needle 2. When the needle is pulled out, the pusher 42 is pulled out from between the active structure 31 and the first coiled needle 1, and the active structure 31 returns to its original position under the action of the torsion spring. In this embodiment, a mating part 7 may also be provided on the second coiled needle 2, and the pusher 42 pushes the mating part 7 to assist the active structure 31 in pushing the second coiled needle 2.

[0060] In some embodiments, the active structure 31 is slidably disposed on the first winding needle 1, and the active structure 31 extends out of the side of the first winding needle 1 toward the second winding needle 2 to push the second winding needle 2 away from the first winding needle 1. The transmission mechanism 4 may include a wedge block, which pushes the active structure 31, causing the active structure 31 to move.

[0061] This application provides a rotary clamping needle winding system. Due to the active structure 31, after the material strip passes between the first needle winding 1 and the second needle winding 2, the transmission mechanism 4 drives the active structure 31 to move. The active structure 31 moves towards the second needle winding 2, pressing the material strip against the second needle winding 2 on one hand, and pushing the second needle winding 2 away from the first needle winding 1 on the other hand. This clamps the material strip while separating the first needle winding 1 and the second needle winding 2. After winding is completed, the active structure 31 returns to its original position to release the clamped material strip. The active structure 31 no longer separates the first needle winding 1 and the second needle winding 2, allowing the second needle winding 2 to approach the first needle winding 1. After the second needle winding 2 approaches the first needle winding 1, the tightness of the battery cell on the first needle winding 1 and the second needle winding 2 is released, reducing the friction between the battery cell and the first needle winding 1 and the second needle winding 2. This makes it easier to pull out the first needle winding 1 and the second needle winding 2, and the pulling process is less likely to cause defects such as battery cell pull-out or powder shedding.

[0062] Another embodiment of this application provides a winding device including a rotary clamping needle as described above.

[0063] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0064] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A rotary clamping type coiling needle, characterized in that, It includes: First roll of needles; The second coil of needles is slidably positioned close to or away from the first coil of needles; A clamping structure includes an active structure movably connected to the first coil needle, the active structure being used to press against and push the second coil needle away from the first coil needle; A transmission mechanism, which is connected to the active structure in a transmission manner; Multiple elastic elements, the two ends of which are respectively connected to the first winding needle and the second winding needle; When the active structure moves toward the second winding needle, it presses the material strip against the second winding needle and pushes the second winding needle away from the first winding needle; After winding is completed, the active structure returns to its original position, and the second winding needle moves closer to the first winding needle under the action of the elastic element.

2. The rotary clamping type coiling needle according to claim 1, characterized in that, The active structure is rotatably mounted on the first coil of needles.

3. The rotary clamping type coiling needle according to claim 2, characterized in that, The clamping structure further includes a mating structure disposed on the second coil needle, the mating structure including a clamping surface for the active structure to overlap.

4. The rotary clamping type coiling needle according to claim 3, characterized in that, The mating structure includes a mating groove, the bottom of which is abutted by the active structure, and one wall of the mating groove is the clamping surface.

5. The rotary clamping type coiling needle according to claim 3, characterized in that, The active structure includes an active plate and a rolling element. The active plate is rotatably connected to the first winding needle, and the rolling element is rotatably connected to the active plate and is used to press against the clamping surface.

6. The rotary clamping needle coiler according to claim 2, characterized in that, The transmission mechanism includes a rotating component, which includes: Mounting rack; A rotating shaft is rotatably connected to the mounting bracket, and the rotating shaft is also connected to the active structure via a transmission. A rotary transmission component is connected to the rotating shaft to drive the rotating shaft to rotate.

7. The rotary clamping needle coiler according to claim 6, characterized in that, The rotary transmission component includes: a force-applying component, which is slidably disposed along the axis of the rotating shaft, and a force-applying groove is provided on the circumferential side of the rotating shaft, the force-applying groove is coiled around the rotating shaft, and the force-applying component is inserted into and slidably disposed in the force-applying groove.

8. The rotary clamping needle coiler according to claim 7, characterized in that, The rotary transmission component further includes a return frame and a return elastic element. The return frame is connected to the first winding needle, and the two ends of the return elastic element are respectively connected to the force-applying component and the return frame.

9. The rotary clamping needle winding method according to claim 7, characterized in that, The transmission mechanism further includes a pusher, which is used to connect with an external linear module and to push the force-applying component to slide.

10. The rotary clamping needle coiler according to claim 2, characterized in that, The transmission mechanism includes a pusher for connecting to an external linear module and for being inserted between the active structure and the first winding needle.

11. The rotary clamping needle coiler according to claim 9 or 10, characterized in that, It also includes a mating component that is connected to the second winding needle, and the front end of the pusher is wedge-shaped. The pusher is used to abut against and push the mating component and the second winding needle away from the first winding needle.

12. The rotary clamping type coiling needle according to claim 1, characterized in that, The active structure is slidably disposed on the first coil of needles.

13. The rotary clamping needle coiler according to claim 1, characterized in that, It also includes a needle holder, which includes a first needle holder and a second needle holder. The first coiled needle is fixed to the first needle holder, the second coiled needle is fixed to the second needle holder, and the second needle holder is slidably disposed near or away from the first needle holder.

14. A winding device, characterized in that, Including the rotary clamping needle as described in any one of claims 1 to 13.

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