Winding mechanism

Abstract

This application is applicable to the technical field of core winding processes, and provides a winding mechanism, including: a frame; a commutation assembly rotatably mounted on the frame; a winding needle assembly rotatably arranged on the commutation assembly and used for clamping a diaphragm; a transmission assembly including a transmission shaft coaxially arranged with the commutation assembly, a first gear arranged on the transmission shaft, a second gear meshing with the first gear, a third gear connected to the second gear and coaxially arranged with the second gear, and a fourth gear meshing with the third gear; the fourth gear is arranged on the winding needle assembly and coaxially arranged with the winding needle assembly. With such a setting, it is possible to shorten the length of the pole piece that the winding needle assembly pulls out at one time when the winding needle assembly rotates to another station driven by the commutation assembly, so that the length of the pole piece pulled out by the winding needle assembly can be suitable for the pole piece lengths at both ends of a short core. Thus, the winding mechanism of this embodiment can be applied to the winding work of short cores.

Description

Technical Field

[0001] The present application belongs to the technical field of battery cell winding technology, and more specifically, relates to a winding mechanism. Background Art

[0002] In the field of battery cell winding, the winding mechanism usually includes a winding needle assembly and a winding needle drive assembly. When working, the winding needle drive assembly drives the winding needle assembly to rotate, so that the winding needle assembly can realize the battery cell winding work; and generally, in order to improve the winding efficiency, the number of winding needle assemblies is set to at least two, and the winding mechanism is also provided with a disc-shaped rotating frame, which is used to rotate the winding needle assembly to different workstations.

[0003] In the traditional solution, in order to enable the winding needle drive assembly to realize the rotation of at least two winding needle assemblies at the same time, the winding needle drive assembly needs to be connected to the at least two winding needle assemblies at the same time, which makes the winding needle assembly farther away from the central axis of the bogie; in this way, when the winding needle assembly rotates driven by the steering wheel to rotate to another workstation, the winding needle assembly will pull out a longer pole piece at one time, and the pulled pole piece will not be able to adapt to the pole piece length at the head and tail ends of the short battery cell. Therefore, the winding mechanism in the traditional solution is difficult to apply to the winding work of the short battery cell. Summary of the invention

[0004] One of the purposes of the embodiments of the present application is to provide a winding mechanism, aiming to solve the technical problem in the prior art that the winding mechanism is difficult to apply to the winding work of short and small battery cells.

[0005] In order to solve the above technical problems, the technical solution adopted in the embodiment of the present application is:

[0006] A winding mechanism is provided, comprising:

[0007] frame;

[0008] A reversing assembly, rotatably mounted on the frame;

[0009] A winding needle assembly is rotatably disposed on the reversing assembly and is used to clamp the diaphragm;

[0010] The transmission assembly includes a transmission shaft coaxially arranged with the reversing assembly, a first gear arranged on the transmission shaft, a second gear meshing with the first gear, a third gear connected to the second gear and coaxially arranged with the second gear, and a fourth gear meshing with the third gear; the fourth gear is arranged on the winding needle assembly and coaxially arranged with the winding needle assembly.

[0011] In one embodiment, the winding needle assemblies, the first gears, the second gears, the third gears, and the fourth gears are all provided in three; the three first gears are axially spaced apart and distributed on the transmission shaft, each first gear meshes with each second gear, each third gear is coaxially connected to each second gear, each fourth gear is provided on each winding needle assembly and meshes with each third gear; the three winding needle assemblies are circumferentially and uniformly distributed on the outer periphery of the central axis of the commutation assembly and are all located within the space formed by enclosing the three third gears.

[0012] In one embodiment, the commutation assembly includes a first rotating frame and a second rotating frame that are axially spaced apart and relatively fixed; the winding needle assembly is rotatably provided on the first rotating frame, the transmission shaft is rotatably provided on the second rotating frame and is coaxially arranged with the second rotating frame; the second rotating frame is axially penetrated with a rotatable connecting shaft, and the second gear and the third gear are respectively arranged at opposite ends of the connecting shaft.

[0013] In one embodiment, the winding needle assembly includes a winding needle for clamping the diaphragm and a transmission sleeve sleeved on the winding needle, the transmission sleeve is rotatably provided on the commutation assembly, and the fourth gear is provided on the transmission sleeve; the transmission sleeve can drive the winding needle to rotate, and the winding needle can move axially relative to the transmission sleeve to advance the needle or retract the needle backward.

[0014] In one embodiment, the winding needle includes a first winding needle lobe and a second winding needle lobe, and the transmission sleeve is sleeved outside the first winding needle lobe and the second winding needle lobe; the inner peripheral wall of the transmission sleeve is provided with spaced-apart first grooves and second grooves, and both the first grooves and the second grooves extend along the axial direction of the transmission sleeve; the first winding needle lobe is provided with a first rib, the second winding needle lobe is provided with a second rib, and the first rib and the second rib correspondingly slide and extend into the first groove and the second groove.

[0015] In one embodiment, the winding mechanism further includes a needle receiving bracket relatively fixed to the commutation assembly and a needle receiving nozzle rotatably provided on the needle receiving bracket, the needle receiving nozzle is axially provided with a positioning groove at one end facing the winding needle assembly, and the positioning groove is used for positioning the winding needle assembly therein.

[0016] In one embodiment, the positioning groove includes a first groove section and a second groove section, and the first groove section and the second groove section are sequentially distributed along the axial direction of the needle receiving nozzle towards the winding needle assembly; a cone is provided in the first groove section, the cone is integrally formed at one end of the needle receiving nozzle axially facing the winding needle assembly and is tapered towards the winding needle assembly.

[0017] In one embodiment, the inner peripheral wall of the second slot section is arranged to gradually expand towards the coiling needle assembly along the axial direction of the needle receiving nozzle.

[0018] In one embodiment, the needle receiving bracket includes a first bracket, a needle receiving triangular head, and a connecting member connected between the first bracket and the needle receiving triangular head; the first bracket and the needle receiving triangular head are sequentially distributed along the axial direction of the coiling needle assembly, the needle receiving nozzle is rotatably arranged on the needle receiving triangular head, and the coiling needle assembly movably passes through the first bracket to be positioned in the positioning slot.

[0019] In one embodiment, the needle receiving bracket further includes an intermediate triangular head arranged between the first bracket and the needle receiving triangular head, the connecting member includes a first connecting section and a second connecting section, the first connecting section is connected between the first bracket and the intermediate triangular head, and the second connecting section is connected between the intermediate triangular head and the needle receiving triangular head; the coiling needle assembly sequentially passes through the first bracket and the intermediate triangular head to be positioned in the positioning slot.

[0020] The beneficial effect of the winding mechanism provided by the embodiment of the present application lies in that: compared with the prior art, in the present application, the transmission shaft of the transmission component and the commutation component are coaxially arranged, that is, the central axis of the transmission shaft coincides with the central axis of the commutation component, and the second gear is engaged with the first gear on the transmission shaft, the third gear is connected to the second gear and is coaxially arranged with the second gear, and the fourth gear on the coiling needle assembly is engaged with the third gear. In this way, when setting the coiling needle assembly, the coiling needle assembly can be made as close as possible to the central axis of the commutation component, so that when the coiling needle assembly rotates to another working position driven by the commutation component, the length of the pole piece pulled out by the coiling needle assembly at one time can be shortened, and then the length of the pole piece pulled out by the coiling needle assembly can be well adapted to the pole piece lengths at both ends of the short battery cell. Thus, the winding mechanism provided by this embodiment can be applied to the winding work of short battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0022] Figure 1 Is a three-dimensional schematic diagram of the winding mechanism provided by the embodiment of the present application;

[0023] Figure 2 Is Figure 1 Partial enlargement of Figure 1;

[0024] Figure 3 For Figure 1 The three-dimensional schematic diagram of the winding needle assembly of the provided winding mechanism;

[0025] Figure 4 For Figure 3 Exploded view of;

[0026] Figure 5 For Figure 1 Partial enlargement of Figure 2 ;

[0027] Figure 6 For Figure 1 The three-dimensional schematic diagram of the needle receiving nozzle of the provided winding mechanism;

[0028] Figure 7 For Figure 3 Partial enlarged view at position A in;

[0029] Figure 8 For Figure 1 The three-dimensional schematic diagram of the needle receiving bracket of the provided winding mechanism.

[0030] Among them, each reference numeral in the figure:

[0031] 1 - Frame; 2 - Commutation assembly; 21 - First rotating frame; 22 - Second rotating frame; 23 - Connecting column; 3 - Winding needle assembly; 31 - Winding needle; 311 - First winding needle lobe; 3111 - First guiding head; 312 - Second winding needle lobe; 3121 - Second guiding head; 313 - First rib; 314 - Second rib; 32 - Transmission sleeve; 3201 - First groove; 3202 - Second groove; 33 - First limiting member; 34 - Second limiting member; 4 - Transmission assembly; 41 - Transmission shaft; 42 - First gear; 43 - Second gear; 44 - Third gear; 45 - Fourth gear; 46 - Connecting shaft; 5 - Needle receiving bracket; 51 - First bracket; 5101 - First avoiding hole; 52 - Needle receiving triangular head; 53 - Connecting member; 5301 - Second avoiding hole; 5302 - Knife groove; 531 - First connecting section; 532 - Second connecting section; 54 - Intermediate triangular head; 6 - Needle receiving nozzle; 601 - Positioning groove; 6011 - First groove section; 6012 - Second groove section; 61 - Cone; 7 - First bearing; 8 - Second bearing. Detailed implementation manners

[0032] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0033] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means more than two, unless otherwise specifically defined, and more than two includes two.

[0035] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0036] The following will be described in detail with reference to specific drawings and embodiments:

[0037] Please refer to Figure 1 and Figure 2 , the winding mechanism provided by the embodiment of the present application includes a frame 1, a commutation assembly 2, a winding needle assembly 3, and a transmission assembly 4.

[0038] The commutation component 2 is rotatably mounted on the frame 1; the needle winding component 3 is rotatably arranged on the commutation component 2 and is used for clamping the diaphragm. Wherein, the central axis of the commutation component 2 is parallel to the central axis of the needle winding component 3. It should be noted here that the winding mechanism has a needle outlet station, a winding station and a needle receiving station. The commutation component 2 can rotate on the frame 1 along its central axis, so that the needle winding component 3 on the commutation component 2 rotates to the needle outlet station, the winding station and the needle receiving station in sequence; the needle winding component 3 is used for clamping the diaphragm and can wind the diaphragm and the pole piece when rotating on the commutation component 2 along its central axis, which is beneficial to the winding and forming of the battery cell. Based on this, during operation, the needle winding component 3 first rotates to the needle outlet station under the rotation of the commutation component 2, the needle winding component 3 advances to eject the needle and clamps the diaphragm; then, the needle winding component 3 rotates to the winding station under the rotation of the commutation component 2, and the transmission component 4 drives the needle winding component 3 to rotate under the drive of an external driver, so that the needle winding component 3 rotates relative to the commutation component 2 around its central axis, thereby winding the diaphragm and the pole piece to realize the forming of the battery cell; then, the needle winding component 3 rotates to the needle receiving station under the rotation of the commutation component 2, and the needle winding component 3 retracts to receive the needle to realize the blanking of the battery cell; continuously, the needle winding component 3 rotates to the needle outlet station under the rotation of the commutation component 2... and so on, so that the needle winding component 3 continuously performs the battery cell winding work.

[0039] Wherein, optionally, the number of the needle winding components 3 can be set to at least two; after the commutation component 2 drives the needle winding component 3 to rotate, at least two needle winding components 3 can be respectively located at two different stations. In this way, at least two needle winding components 3 can perform corresponding work simultaneously, which is beneficial to improving the winding efficiency of the battery cell.

[0040] The transmission assembly 4 includes a transmission shaft 41, a first gear 42, a second gear 43, a third gear 44, and a fourth gear 45. The transmission shaft 41 is coaxially arranged with the commutation assembly 2, that is, the central axis of the transmission shaft 41 coincides with the central axis of the commutation assembly 2. The first gear 42 is arranged on the transmission shaft 41 and is coaxially arranged with the transmission shaft 41, so that the first gear 42 can rotate synchronously with the transmission shaft 41. The second gear 43 meshes with the first gear 42. The third gear 44 is connected to the second gear 43 and is coaxially arranged with the second gear 43; it can be understood that the third gear 44 and the second gear 43 are relatively fixed, and the central axis of the third gear 44 coincides with the central axis of the second gear 43, so that the third gear 44 can be driven by the second gear 43 to rotate coaxially and synchronously with the second gear 43. The fourth gear 45 meshes with the third gear 44. The fourth gear 45 is arranged on the needle winding assembly 3 and is coaxially arranged with the needle winding assembly 3; it can be understood that the fourth gear 45 and the needle winding assembly 3 are relatively fixed, and the central axis of the fourth gear 45 coincides with the neutral axis of the needle winding assembly 3, so that the needle winding assembly 3 can be driven by the fourth gear 45 to rotate coaxially and synchronously with the fourth gear 45. Based on this, the transmission assembly 4 can be connected to an external driver through the transmission shaft 41, and the power output by the external driver is sequentially transmitted to the needle winding assembly 3 through the transmission shaft 41, the first gear 42, the second gear 43, the third gear 44, and the fourth gear 45, so that the needle winding assembly 3 rotates along its central axis on the commutation assembly 2 under the transmission action of the transmission assembly 4.

[0041] Here, it should be noted that when there are at least two needle winding assemblies 3, for the convenience of the winding work of the pole piece, the pole piece is generally wound around the outer periphery of all the needle winding assemblies 3 before being wound into an electric core. In this way, when the needle winding assembly 3 rotates to another station under the rotation of the commutation assembly 2, the needle winding assembly 3 will pull the pole piece to this station, that is, at this time, the length of the pole piece pulled out is at least the length of the arc segment between two adjacent needle winding assemblies 3 with the point where the central axis of the commutation assembly 2 is located as the center of the circle.

[0042] In a traditional winding machine, the winding needle assembly 3 is far from the central axis of the bogie. When at least two winding needle assemblies 3 are provided, the at least two winding needle assemblies 3 are relatively spread out. In this way, the length of the arc segment between two adjacent winding needle assemblies 3 of the circle formed with the point on the central axis of the commutation frame as the center also increases, resulting in an increase in the length of the pole piece pulled out when the winding needle assembly 3 rotates to the next working position. Thus, on the one hand, after the pole piece is cut off, the length of the pole piece hanging outside the winding needle assembly 3 is relatively large, making it difficult to position the pole piece. Especially when the winding mechanism is applied to wind short electric cores, the width dimension of the pole piece needs to correspond to that for winding short electric cores. Based on the requirements of short electric cores, the width dimension of the pole piece needs to be set relatively small. In this way, the problem of difficult pole piece positioning is greatly aggravated, and there is an inevitable risk of degree difference and insufficient tension of the pole piece, thus affecting the quality of the wound electric core. On the other hand, short electric cores do not have a large demand for the length of the pole piece, so part of the pole piece is easily wasted after the pole is cut off. Herein, the short electric core referred to in this embodiment refers to an electric core with a relatively short axial length and a relatively small diameter. Correspondingly, the first and last lengths of the pole piece used for this electric core are relatively short, and the width dimension is also relatively small.

[0043] Therefore, in the embodiment of the present application, the transmission shaft 41 of the transmission component 4 is coaxially arranged with the commutation component 2, so that the central axis of the transmission shaft 41 coincides with the central axis of the commutation component 2. The second gear 43 is engaged with the first gear 42 on the transmission shaft 41, the third gear 44 is connected to the second gear 43 and is coaxially arranged with the second gear 43, and the fourth gear 45 on the winding needle assembly 3 is engaged with the third gear 44. In this way, based on the coincidence of the central axis of the transmission shaft 41 and the central axis of the commutation component 2, the second gear 43 engaged with the first gear 42 on the transmission shaft 41 will be far from the central axis of the commutation component 2. Correspondingly, the third gear 44 coaxially connected to the second gear 43 is also far from the central axis of the commutation component 2. Since the winding needle assembly 3 is engaged with the third gear 44 through the fourth gear 45, through the engagement of the first gear 42 and the second gear 43, the coaxial arrangement of the second gear 43 and the third gear 44, and the engagement relationship between the third gear 44 and the fourth gear 45, when arranging the winding needle assembly 3, the winding needle assembly 3 can be made to be as close as possible to the central axis of the commutation component 2. Then, when at least two winding needle assemblies 3 are provided, the at least two winding needle assemblies 3 can be made to be closer to the central axis of the commutation component 2. In this way, when the winding needle assembly 3 rotates to another working position driven by the commutation component 2, the length of the pole piece pulled out by the winding needle assembly 3 at one time can be shortened, and further, the length of the pole piece pulled out by the winding needle assembly 3 can be well adapted to the lengths of the pole pieces at both ends of the short electric core. Thus, the winding mechanism provided in this embodiment can be applied to the winding work of short electric cores.

[0044] In one embodiment, please refer toFigure 1 and Figure 2 The winding needle assemblies 3, the first gear 42, the second gear 43, the third gear 44 and the fourth gear 45 are all provided in three. The three first gears 42 are axially spaced along the driving shaft on the transmission shaft 41. Each first gear 42 meshes with each second gear 43. Each third gear 44 is coaxially connected to each second gear 43. Each fourth gear 45 is provided on each winding needle assembly 3 and meshes with each third gear 44. The three winding needle assemblies 3 are evenly distributed along the circumferential direction on the outer periphery of the central axis of the commutation assembly 2. It can be understood that the three winding needle assemblies 3 are evenly distributed with the central axis of the commutation assembly 2 as the central axis. The three winding needle assemblies 3 are all located in the space formed by enclosing the three third gears 44. With such a setting, when the transmission shaft 41 rotates under the drive of an external driver, the three first gears 42 on the transmission shaft 41 all rotate synchronously with the transmission shaft 41, so that the rotation of the three winding needle assemblies 3 can be realized simultaneously, which is beneficial to improving the winding efficiency of the battery cell.

[0045] By adopting the above technical solution, the three winding needle assemblies 3 can be respectively located at three different stations, and further the three winding needle assemblies 3 can all perform corresponding operations simultaneously, realizing the repeated continuous operation of the three winding needle assemblies 3 among the three stations of the needle-out station, the winding station and the needle-in station, which is beneficial to improving the winding efficiency of the battery cell; moreover, the three winding needle assemblies 3 are located in the space formed by enclosing the three third gears 44, so that the three winding needle assemblies 3 are arranged close to the central axis of the commutation assembly 2, which is beneficial to reducing the length of the pole piece pulled out when the winding needle assembly 3 rotates to the next station, enabling the winding mechanism to be applied to the winding work of short battery cells, and helping to improve the positioning of the pole piece to improve the quality of the battery cell after winding and forming.

[0046] In one embodiment, please refer to Figure 1 and Figure 2 The commutation assembly 2 includes a first rotating frame 21 and a second rotating frame 22. The first rotating frame 21 and the second rotating frame 22 are axially spaced along the commutation assembly 2 and are relatively fixed, so that the first rotating frame 21 and the second rotating frame 22 can rotate synchronously; wherein, the central axis of the first rotating frame 21 and the central axis of the second rotating frame 22 are coincidentally arranged and are parallel to the central axis of the uniform winding needle assembly 3.

[0047] The winding needle assembly 3 is rotatably arranged on the first rotating frame 21; the transmission shaft 41 is rotatably arranged on the second rotating frame 22 and is coaxially arranged with the second rotating frame 22, that is, the central axis of the transmission shaft 41 coincides with the central axis of the second rotating frame 22. The second rotating frame 22 is axially penetrated with a rotatable connecting shaft 46, and the second gear 43 and the third gear 44 are respectively arranged at opposite ends of the connecting shaft 46; it can be understood that the connecting shaft 46 is rotatably arranged on the second rotating frame 22, and the connecting shaft 46 axially penetrates the second rotating frame 22 along the axial direction of the second rotating frame 22, then the central axis of the connecting shaft 46 is parallel to the central axis of the second rotating frame 22, and the second gear 43 and the third gear 44 are respectively arranged at the axial two ends of the connecting shaft 46, so the second gear 43 and the third gear 44 are respectively arranged on the opposite sides of the second rotating frame 22 along the axial direction, and the third gear 44 is located between the first rotating frame 21 and the second rotating frame 22.

[0048] Based on such an arrangement, the transmission shaft 41 is rotatably arranged on the second rotating frame 22, enabling the second rotating frame 22 to support the transmission shaft 41, which is beneficial to the stable transmission of power of the transmission shaft 41; moreover, the connecting shaft 46 axially penetrates the second rotating frame 22, enabling the second rotating frame 22 to also support the connecting shaft 46. Based on the fact that the second gear 43 and the third gear 44 are respectively arranged at the axial two ends of the connecting shaft 46, the second rotating frame 22 can thus support the second gear 43 and the third gear 44, which is beneficial to improving the stability of the first gear 42 transmitting power to the second gear 43, and also beneficial to improving the stability of the second gear 43 transmitting power to the third gear 44, and at the same time is also beneficial to the stability of the third gear 44 transmitting power to the fourth gear 45. And the fourth gear 45 is arranged on the winding needle assembly 3. In this way, the stability of the power being transmitted successively through the transmission shaft 41, the first gear 42, the second gear 43, the third gear 44, the fourth gear 45 and the winding needle assembly 3 is improved, thereby being beneficial to improving the cell winding effect of the winding needle assembly 3.

[0049] It should be noted here that the second gear 43 and the third gear 44 are respectively arranged on the opposite sides of the second rotating frame 22 along the axial direction, and the third gear 44 is located between the first rotating frame 21 and the second rotating frame 22, then the second gear 43 is located on the side of the second rotating frame 22 along the axial direction away from the first rotating frame 21; based on the setting that the second gear 43 meshes with the first gear 42 on the transmission shaft 41, the transmission shaft 41 is also arranged on the side of the second rotating frame 22 along the axial direction away from the first rotating frame 21, which is beneficial to the layout of the transmission shaft 41.

[0050] It should also be noted here that when the first rotating frame 21 needs to rotate to rotate the needle winding assembly 3 to the next working station, the second rotating frame 22 rotates synchronously with the first rotating frame 21 under the drive of the first rotating frame 21, so that the second gear 43, the third gear 44, the fourth gear 45 and the connecting shaft 46 of the transmission assembly 4 all rotate under the drive of the first rotating frame 21 and the second rotating frame 22. Therefore, when the needle winding assembly 3 rotates to the next working station, the transmission assembly 4 can still transmit power to the needle winding assembly 3 to realize the winding work of the needle winding assembly 3.

[0051] Optionally, the commutation assembly 2 further includes a connecting column 23, and the connecting column 23 is connected between the second rotating frame 22 and the third rotating frame to realize the relative fixation of the second rotating frame 22 and the third rotating frame.

[0052] In one embodiment, please refer to Figure 2 and Figure 3 , the needle winding assembly 3 includes a needle 31 for clamping the diaphragm and a transmission sleeve 32 sleeved on the needle 31. The transmission sleeve 32 is rotatably arranged on the commutation assembly 2, and the fourth gear 45 is arranged on the transmission sleeve 32; the transmission sleeve 32 can drive the needle 31 to rotate, and the needle 31 can move axially relative to the transmission sleeve 32 to advance the needle or retract the needle backward. With such a setting, the needle 31 and the transmission sleeve 32 are coaxially arranged, relatively fixed in the circumferential direction, and relatively movable in the axial direction; during operation, when the needle winding assembly 3 rotates to the needle-out working station, the needle 31 advances axially relative to the transmission sleeve 32 to eject the needle and clamp the diaphragm; when the needle winding assembly 3 rotates to the winding working station, the transmission shaft 41 transmits power to the fourth gear 45 in sequence, and the transmission sleeve 32 drives the needle 31 to rotate under the drive of the fourth gear 45 to wind the pole piece and the diaphragm to realize the winding and forming of the battery cell; when the needle winding assembly 3 rotates to the needle-retracting working station, the needle winding assembly 3 retracts the needle axially relative to the transmission sleeve 32 to discharge the battery cell.

[0053] Optionally, a first bearing 7 is sleeved on the transmission sleeve 32, and the first bearing 7 is fixed on the commutation assembly 2.

[0054] In one embodiment, please refer to Figures 2 to 4, the winding needle 31 includes a first winding needle lobe 311 and a second winding needle lobe 312, and the transmission sleeve 32 is sleeved outside the first winding needle lobe 311 and the second winding needle lobe 312; wherein, the first winding needle lobe 311 and the second winding needle lobe 312 are used to jointly clamp the diaphragm. The inner peripheral wall of the transmission sleeve 32 is provided with a first groove 3201 and a second groove 3202 that are circumferentially spaced apart, and both the first groove 3201 and the second groove 3202 extend along the axial direction of the transmission sleeve 32; the first winding needle lobe 311 is provided with a first rib 313, and the second winding needle lobe 312 is provided with a second rib 314, and the first rib 313 and the second rib 314 correspondingly slide into the first groove 3201 and the second groove 3202. With such a setting, when the transmission sleeve 32 rotates driven by the fourth gear 45, the transmission sleeve 32 drives the first winding needle lobe 311 to rotate through the first rib 313, and drives the second winding needle lobe 312 to rotate through the second rib 314, so that the transmission sleeve 32 drives the first winding needle lobe 311 and the second winding needle lobe 312 to rotate simultaneously to realize the winding work; wherein, through the positioning and guiding of the first rib 313 and the first groove 3201, and the positioning and guiding of the second rib 314 and the second groove 3202, the reliability of the axial movement of the winding needle 31 can be improved. Moreover, the first rib 313 can slide axially along the transmission sleeve 32 in the first groove 3201, so that the first winding needle lobe 311 can move axially relative to the transmission sleeve 32 along the transmission sleeve 32 to advance the needle or retract the needle backward. Correspondingly, the second rib 314 can slide axially along the transmission sleeve 32 in the second groove 3202, so that the second winding needle lobe 312 can move axially relative to the transmission sleeve 32 along the transmission sleeve 32 to advance the needle or retract the needle backward. Therefore, by adopting the above technical solution, the rotation, forward needle insertion and backward needle withdrawal of the winding needle 31 can be realized.

[0055] Wherein, when the winding needle 31 advances and withdraws the needle, the first winding needle lobe 311 and the second winding needle lobe 312 can advance and withdraw the needle in sequence, so that the first winding needle lobe 311 and the second winding needle lobe 312 can directly realize the clamping work of the diaphragm after advancing and withdrawing the needle.

[0056] Optionally, the winding needle 31 further includes a first limiting member 33 and a second limiting member 34. The first limiting member 33 is arranged at one end of the first winding needle lobe 311 along the axial direction, and the second limiting member 34 is arranged at one end of the second winding needle lobe 312 along the axial direction. Both the first winding needle lobe 311 and the second winding needle lobe 312 axially penetrate through the commutation assembly 2 along the axial direction of the winding needle 31; wherein, both the first limiting member 33 and the second limiting member 34 are arranged between the first rotating frame 21 and the second rotating frame 22.

[0057] Correspondingly, the needle retracting and feeding mechanism of the winding mechanism includes two needle retracting claws and a needle feeding follower wheel. Among them, the two needle retracting claws can be separately controlled, and the needle feeding follower wheel is also separately controlled from the needle retracting claws. During operation, when the needle winding assembly 3 rotates to the needle retracting station, the two needle retracting claws respectively move to one side of the first limiting member 33 and the second limiting member 34 along the axis. The two needle retracting claws respectively pull the first limiting member 33 and the second limiting member 34 backward, so that the first needle winding lobe 311 and the second needle winding lobe 312 are retracted to retract the needle, realizing the blanking of the battery cell. Subsequently, one of the needle retracting claws pushes against the first limiting member 33 to realize the forward needle feeding of the first needle winding lobe 311. At this time, the diaphragm can be placed on one side of the first needle winding lobe 311 facing the second needle winding lobe 312. Then, when the needle winding assembly 3 rotates to the needle feeding station, the needle feeding follower wheel pushes against the second limiting member 34 to realize the forward needle feeding of the second needle winding lobe 312, so that the second needle winding lobe 312 and the first needle winding lobe 311 clamp the diaphragm placed on one side of the first needle winding lobe 311.

[0058] In one embodiment, please refer to Figure 5 and Figure 6 simultaneously. The winding mechanism further includes a needle receiving bracket 5 and a needle receiving nozzle 6. The needle receiving bracket 5 is relatively fixed to the commutation assembly 2. The needle receiving nozzle 6 is rotatably arranged on the needle receiving bracket 5. A positioning groove 601 is formed at one end of the needle receiving nozzle 6 along the axis facing the needle winding assembly 3. The positioning groove 601 is used for positioning the needle winding assembly 3 therein. With such a setting, after the needle winding assembly 3 advances and retracts the needle along the axis, the needle winding assembly 3 extends out of the commutation assembly 2 and extends into the positioning groove 601 of the needle receiving nozzle 6 to form a positioning with the needle receiving nozzle 6. Thus, the positioning of the needle winding assembly 3 is realized. Then, when the needle winding assembly 3 rotates around its central axis under the power output of the transmission assembly 4, the needle winding assembly 3 and the needle receiving nozzle 6 rotate synchronously to realize the winding work of the battery cell. This can improve the positioning strength of the needle winding assembly 3 during winding, enable the winding assembly to wind stably, and is beneficial to improving the quality of the battery cell after winding and forming.

[0059] In a specific embodiment, the needle receiving bracket 5 is arranged on the side of the commutation assembly 2 along the axis facing away from the transmission shaft 41, and the needle receiving bracket 5 is connected to the commutation assembly 2, so that the needle receiving bracket 5 can rotate synchronously under the rotation of the commutation assembly 2. The needle receiving nozzle 6 is rotatably arranged on the needle receiving bracket 5 and faces the commutation assembly 2 along the axis. The needle winding assembly 3 is rotatably arranged on the commutation assembly 2 and extends out of the side of the commutation assembly 2 where the needle receiving bracket 5 is arranged along the axis. In this way, the needle receiving nozzle 6 can be arranged along the axis facing the needle winding assembly 3, and further the needle winding assembly 3 can extend out of the commutation assembly 2 along the axis after advancing and retracting the needle and extend into the positioning groove 601 of the needle receiving nozzle 6 to be positioned in the positioning groove 601. Among them, the central axis of the needle receiving nozzle 6 is parallel to the central axis of the commutation assembly 2 and coincides with the central axis of the corresponding needle winding assembly 3.

[0060] Optionally, a second bearing 8 is sleeved outside the needle receiving nozzle 6, and the second bearing 8 is fixed to the needle receiving bracket 5.

[0061] In one embodiment, please refer to Figure 5 and Figure 6 , the positioning groove 601 includes a first groove section 6011 and a second groove section 6012. The first groove section 6011 and the second groove section 6012 are arranged at one end of the needle receiving nozzle 6 along the axial direction facing the winding needle assembly 3, and are sequentially distributed along the axial direction of the needle receiving nozzle 6 facing the winding needle assembly 3. The first groove section 6011 and the second groove section 6012 are communicated; a cone 61 is arranged in the first groove section 6011. The cone 61 is integrally formed at one end of the needle receiving nozzle 6 along the axial direction facing the winding needle assembly 3, and is arranged to be reduced in size toward the winding needle assembly 3. With such an arrangement, after the winding needle assembly 3 advances and retracts the needle along the axial direction, the winding needle assembly 3 extends out of the commutation assembly 2 and sequentially extends into the first groove section 6011 and the second groove section 6012 of the needle receiving nozzle 6 to cooperate with the cone 61, so that the winding needle assembly 3 forms a position through the cone 61 in the second groove section 6012, thereby ensuring the position of the winding needle assembly 3 during winding; moreover, the cone 61 is integrally formed at one end of the needle receiving nozzle 6 along the axial direction facing the winding needle assembly 3. Compared with the separately arranged cone 61, the cone 61 has greater structural strength, which is beneficial to ensuring the positioning effect of the winding needle assembly 3, and thus helps to ensure the winding effect of the winding needle assembly 3.

[0062] In this embodiment, the cone 61 is arranged to be reduced in size along the axial direction of the needle receiving nozzle 6 toward the winding needle assembly 3, so that the outer peripheral wall of the cone 61 can guide the movement of the winding needle assembly 3. Then, the winding needle assembly 3 can slide better relative to the outer peripheral wall of the cone 61, so as to form a positioning fit with the cone 61. In this way, it is beneficial to improve the positioning effect on the winding needle assembly 3. Moreover, the cone 61 and the inner peripheral wall of the first groove section 6011 are spaced apart, so that the head of the winding needle assembly 3 can be positioned between the inner peripheral wall of the first groove section 6011 and the outer peripheral wall of the cone 61, which is beneficial to improving the positioning effect on the winding needle assembly 3.

[0063] In this embodiment, when the first winding needle lobe 311 and the second winding needle lobe 312 of the winding needle assembly 3 are guided into the second groove section 6012, the first winding needle lobe 311 and the second winding needle lobe 312 are respectively located on both sides of the cone 61. Then, the cone 61 can realize the expansion setting of the first winding needle lobe 311 and the second winding needle lobe 312. After the electric core is wound and formed, the central hole of the electric core is the diameter of the winding needle 31 formed after the first winding needle lobe 311 and the second winding needle lobe 312 are expanded; thus, when the winding needle assembly 3 retracts and withdraws the needle, the first winding needle lobe 311 and the second winding needle lobe 312 leave the cone 61, so that the first winding needle lobe 311 and the second winding needle lobe 312 can move toward each other to contract the winding needle 31, which is beneficial to the blanking of the electric core from the winding needle 31.

[0064] Optionally, the cone 61 is formed on the needle receiving nozzle 6 by processes such as engraving and injection molding.

[0065] In a specific embodiment, please refer to Figure 6 and Figure 7 , the first coiling needle lobe 311 has a first guiding head 3111 at one end along the axial direction of the coiling needle 31 facing the needle receiving nozzle 6, the second coiling needle lobe 312 has a second guiding head 3121 at one end along the axial direction of the coiling needle 31 facing the needle receiving nozzle 6, the first guiding head 3111 and the second guiding head 3121 are arranged at intervals, and the inner side walls of the first guiding head 3111 and the second guiding head 3121 facing each other are arranged to gradually expand along the axial direction towards the needle receiving nozzle 6, so that the first guiding head 3111 and the second guiding head 3121 can be better guided between the inner peripheral wall of the first groove section 6011 and the outer peripheral wall of the cone 61, which is beneficial to improving the guiding and positioning effects of the coiling needle assembly 3.

[0066] In one embodiment, please refer to Figure 6 , the inner peripheral wall of the second groove section 6012 is arranged to gradually expand along the axial direction of the needle receiving nozzle 6 towards the coiling needle assembly 3. It can be understood that the inner peripheral wall of the second groove section 6012 is arranged as a conical surface with an inner diameter gradually increasing along the axial direction towards the coiling needle assembly 3. Such a setting helps to guide the coiling needle assembly 3 into the second groove section 6012 to form a positioning fit with the cone 61, which is helpful to improve the positioning effect of the coiling needle assembly 3.

[0067] In one embodiment, please refer to Figure 5 and Figure 8 , the needle receiving bracket 5 includes a first bracket 51, a needle receiving triangular head 52, and a connecting member 53 connecting the first bracket 51 and the needle receiving triangular head 52; wherein, the first bracket 51 is relatively fixed to the commutation assembly 2. The first bracket 51 and the needle receiving triangular head 52 are sequentially distributed along the axial direction of the coiling needle assembly 3, the needle receiving nozzle 6 is rotatably arranged on the needle receiving triangular head 52, and the coiling needle assembly 3 movably passes through the first bracket 51 to be positioned in the positioning groove 601. Such a setting enables the coiling needle assembly 3 to be positioned in the needle receiving nozzle 6 after passing through the commutation assembly 2 and the first bracket 51, ensuring the positioning effect of the coiling needle assembly 3.

[0068] In a specific embodiment, the first bracket 51 and the needle receiving triangular head 52 are sequentially distributed along the direction in which the coiling needle assembly 3 extends out of the commutation assembly 2, so that the coiling needle assembly 3 extending out of the commutation assembly 2 can be positioned in the needle receiving nozzle 6.

[0069] Among them, the first bracket 51 is provided with a first avoiding hole 5101, the first avoiding hole 5101 axially penetrates the first bracket 51 along the axial direction of the coiling needle assembly 3, and the coiling needle assembly 3 passes through the first avoiding hole 5101 to be positioned in the needle receiving nozzle 6.

[0070] Optionally, the connecting member 53 is provided with a knife groove 5302. When the external cutting knife cuts the diaphragm, the cutting knife extends into the knife groove 5302, which is conducive to realizing the cutting work of the cutting knife on the diaphragm.

[0071] Optionally, the outer diameter of the needle-connecting triangular head 52 is smaller than the outer diameter of the first bracket 51. On the one hand, this is conducive to optimizing the layout of the winding mechanism. On the other hand, it can reduce the weight of the needle-connecting bracket 5 and is conducive to the working flexibility of the winding mechanism.

[0072] In one embodiment, please refer to Figure 5 and Figure 8 , the needle-connecting bracket 5 further includes an intermediate triangular head 54 disposed between the first bracket 51 and the needle-connecting triangular head 52. The connecting member 53 includes a first connecting section 531 and a second connecting section 532. The first connecting section 531 is connected between the first bracket 51 and the intermediate triangular head 54, and the second connecting section 532 is connected between the intermediate triangular head 54 and the needle-connecting triangular head 52. The winding needle assembly 3 sequentially passes through the first bracket 51 and the intermediate triangular head 54 to be positioned in the positioning groove 601. With such a setting, after the winding needle assembly 3 sequentially passes through the first bracket 51 and the intermediate triangular head 54 and then extends into the positioning groove 601 of the needle-connecting nozzle 6, the first bracket 51 and the intermediate triangular head 54 can support the winding needle assembly 3, which helps to further ensure the support and positioning effect on the winding needle assembly 3, thus being conducive to improving the positioning effect of the winding needle assembly 3 and the winding effect of the winding needle assembly 3.

[0073] Wherein, the intermediate triangular head 54 is provided with a second avoidance hole 5301. The second avoidance hole 5301 axially penetrates the intermediate triangular head 54 along the winding needle assembly 3. The winding needle assembly 3 sequentially passes through the first avoidance hole 5101 and the second avoidance hole 5301 to be positioned on the needle-connecting nozzle 6.

[0074] Wherein, both the intermediate triangular head 54 and the needle-connecting triangular head 52 are arranged in a triangular head structure, which is conducive to reducing the weight of the needle-connecting bracket 5 and improving the working flexibility of the winding mechanism.

[0075] Optionally, the outer diameter of the intermediate triangular head 54 is smaller than the outer diameter of the first bracket 51. On the one hand, this is conducive to optimizing the layout of the winding mechanism. On the other hand, it can reduce the weight of the needle-connecting bracket 5 and is conducive to improving the working flexibility of the winding mechanism.

[0076] Optionally, the first bracket 51, the needle-connecting triangular head 52, the intermediate triangular head 54, the first connecting section 531 and the second connecting section 532 are integrally formed parts, which is conducive to improving the structural strength of the needle-connecting bracket 5, thus ensuring the support effect on the winding needle assembly 3 and the positioning effect on the winding needle assembly 3.

[0077] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A winding mechanism, characterized in that, Comprising: A frame (1); A commutation component (2), rotatably mounted on the frame (1); A winding needle component (3), rotatably arranged on the commutation component (2) and used for clamping the diaphragm; A transmission component (4), including a transmission shaft (41) coaxially arranged with the commutation component (2), a first gear (42) arranged on the transmission shaft (41), a second gear (43) meshing with the first gear (42), a third gear (44) connected to the second gear (43) and coaxially arranged with the second gear (43), and a fourth gear (45) meshing with the third gear (44); the fourth gear (45) is arranged on the winding needle component (3) and coaxially arranged with the winding needle component (3); The winding mechanism further includes a needle receiving bracket (5) relatively fixed to the commutation component (2) and a needle receiving nozzle (6) rotatably arranged on the needle receiving bracket (5). The needle receiving nozzle (6) is provided with a positioning groove (601) axially facing one end of the winding needle component (3), and the positioning groove (601) is used for positioning the winding needle component (3) therein; a second bearing is sleeved outside the needle receiving nozzle, and the second bearing is fixed on the needle receiving bracket; The needle receiving bracket (5) includes a first bracket (51), a needle receiving triangular head (52), and a connecting member (53) connecting between the first bracket (51) and the needle receiving triangular head (52); the first bracket (51) and the needle receiving triangular head (52) are sequentially distributed along the axial direction of the winding needle component (3), the needle receiving nozzle (6) is rotatably arranged on the needle receiving triangular head (52), and the winding needle component (3) movably passes through the first bracket (51) to be positioned in the positioning groove (601); The needle receiving bracket (5) further includes an intermediate triangular head (54) arranged between the first bracket (51) and the needle receiving triangular head (52). The connecting member (53) includes a first connecting section (531) and a second connecting section (532). The first connecting section (531) is connected between the first bracket (51) and the intermediate triangular head (54), and the second connecting section (532) is connected between the intermediate triangular head (54) and the needle receiving triangular head (52); the winding needle component (3) sequentially passes through the first bracket (51) and the intermediate triangular head (54) to be positioned in the positioning groove (601).

2. The winding mechanism according to claim 1, characterized in that, The needle winding assemblies (3), the first gears (42), the second gears (43), the third gears (44), and the fourth gears (45) are all provided in three; the three first gears (42) are axially spaced apart and distributed on the transmission shaft (41), and each first gear (42) meshes with each second gear (43), each third gear (44) is coaxially connected to each second gear (43), each fourth gear (45) is provided on each needle winding assembly (3) and meshes with each third gear (44); the three needle winding assemblies (3) are circumferentially and evenly distributed on the outer periphery of the central axis of the commutation assembly (2), and are all located within the space formed by enclosing the three third gears (44).

3. The winding mechanism according to claim 1, characterized in that, The commutation assembly (2) includes a first rotating frame (21) and a second rotating frame (22) that are axially spaced apart and relatively fixed; the needle winding assembly (3) is rotatably provided on the first rotating frame (21), the transmission shaft (41) is rotatably provided on the second rotating frame (22) and is coaxially arranged with the second rotating frame (22); the second rotating frame (22) is axially penetrated with a rotatable connecting shaft (46), and the second gear (43) and the third gear (44) are respectively provided at opposite ends of the connecting shaft (46).

4. The winding mechanism according to claim 1, characterized in that, The needle winding assembly (3) includes a needle (31) for clamping the diaphragm and a transmission sleeve (32) sleeved on the needle (31), the transmission sleeve (32) is rotatably provided on the commutation assembly (2), and the fourth gear (45) is provided on the transmission sleeve (32); the transmission sleeve (32) can drive the needle (31) to rotate, and the needle (31) can move axially relative to the transmission sleeve (32) to advance the needle or retract the needle backward.

5. The winding mechanism according to claim 4, characterized in that, The needle (31) includes a first needle lobe (311) and a second needle lobe (312), and the transmission sleeve (32) is sleeved outside the first needle lobe (311) and the second needle lobe (312); the inner peripheral wall of the transmission sleeve (32) is provided with first grooves (3201) and second grooves (3202) that are spaced apart, and both the first grooves (3201) and the second grooves (3202) extend along the axial direction of the transmission sleeve (32); the first needle lobe (311) is provided with a first rib (313), the second needle lobe (312) is provided with a second rib (314), and the first rib (313) and the second rib (314) correspondingly slide into the first grooves (3201) and the second grooves (3202).

6. The winding mechanism according to any one of claims 1-5, characterized in that, The positioning groove (601) includes a first groove section (6011) and a second groove section (6012), and the first groove section (6011) and the second groove section (6012) are sequentially distributed along the axial direction of the needle receiving nozzle (6) towards the direction of the needle winding assembly (3); a cone (61) is arranged in the first groove section (6011), the cone (61) is integrally formed at one end of the needle receiving nozzle (6) along the axial direction towards the needle winding assembly (3), and is arranged to be tapered towards the needle winding assembly (3).

7. The winding mechanism according to claim 6, characterized in that, The inner peripheral wall of the second groove section (6012) is arranged to be gradually expanding along the axial direction of the needle receiving nozzle (6) towards the needle winding assembly (3).

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