Winding mechanism and winding device

Abstract

The present application relates to the technical field of winding devices, and in particular to a winding mechanism and a winding device. The winding mechanism comprises: a winding needle, comprising a first half needle and a second half needle, the first half needle and the second half needle being oppositely arranged at an interval to form a gap; a cutting assembly, comprising a cutting driving part, a pushing part and a cutter, the pushing part and the cutter being both arranged on the cutting driving part, the cutting driving part being used for driving the pushing part and the cutter to move towards the winding needle so as to cut a material belt by the cutter, and the pushing part being used for pushing a free end of the cut material belt into the gap; and a fixing part, used for fixing the free end pushed into the gap in the gap. The winding mechanism provided by the present application can make the winding device have high winding core processing efficiency.

Description

Winding mechanism and winding equipment

[0001] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on June 15, 2023, with application number 202321536661.7 and application name “Winding Mechanism and Winding Equipment,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of winding equipment, and in particular to a winding mechanism and winding equipment. Background Art

[0003] Winding equipment is a device used to process battery cores. It typically includes a winding needle with an open slit. When processing a core using the winding equipment, the needle must first be inserted (the positive and negative electrodes, separator, etc., are inserted through the opening into the slit of the needle), and then the core is wound.

[0004] In the related art, in order to complete the pin insertion action, the winding needle must first be ensured to be retracted in the winding needle seat before the pin insertion action. During the pin insertion action, the winding needle needs to be extended from the winding needle seat so that the positive and negative electrode sheets and the separator can just pass through the opening and enter the gap of the winding needle. Only then can the winding core be wound. However, this pin insertion method has many auxiliary actions (such as the winding needle retracting in the winding needle seat and extending from the winding needle seat), which makes the winding equipment less efficient in processing the core.

[0005] Summary of the Invention

[0006] The present application discloses a winding mechanism and a winding device, which can make the winding device more efficient in processing winding cores.

[0007] In order to achieve the above objectives, in a first aspect, the present application discloses a winding mechanism, comprising:

[0008] A winding needle, the winding needle comprising a first half needle and a second half needle, the first half needle and the second half needle being arranged opposite to each other to form a gap;

[0009] a cutting assembly comprising a cutting drive, a pusher, and a cutter, wherein the pusher and the cutter are both disposed on the cutting drive, the cutting drive being configured to drive the pusher and the cutter toward the winding needle so as to cut the material strip by the cutter, and the pusher being configured to push the free end of the cut material strip into the slit;

[0010] A fixing member is used to fix the free end pushed into the gap in the gap.

[0011] When performing the pin insertion action, since the pusher and the cutter are both arranged on the cutting drive member, the cutting drive member can simultaneously drive the pusher to move in the direction close to the winding needle when driving the cutter to move in the positive direction of the axis in the direction diagram close to the winding needle to cut the material strip, so that the pusher can just push the free end of the cut material strip into the gap, thereby realizing the pin insertion action.

[0012] Based on this, when the winding mechanism is used in the scenario of processing the battery core, the above-mentioned material strip can be understood as the positive and negative electrode sheets and diaphragms of the core. Obviously, in the process of the cutting drive driving the cutter to cut the positive and negative electrode sheets and diaphragms, etc., the pushing member can be synchronously driven to push the free ends of the cut positive and negative electrode sheets and diaphragms into the gap, thereby realizing the action of inserting the core needle. Compared with the related technology, before the needle insertion action is performed, it is necessary to first ensure that the winding needle is retracted in the winding needle seat, and when the needle insertion action is performed, the winding needle needs to be extended from the winding needle seat to complete the needle insertion action. The winding mechanism does not need to perform auxiliary actions (actions such as the winding needle retracting in the winding needle seat and extending from the winding needle seat). Therefore, when the winding mechanism is used in the winding equipment, it can improve the efficiency of the winding equipment in processing the core to a certain extent, thereby making the winding equipment more efficient in processing the core.

[0013] Optionally, the cutting assembly further comprises:

[0014] A pushing drive member, the pushing drive member is arranged on the cutting drive member, the pushing member is arranged on the pushing drive member, the cutting drive member is used to drive the pushing drive member to move in the direction close to the winding needle, so as to drive the pushing member to move in the direction close to the winding needle, and the pushing drive member is used to drive the pushing member to push the free end of the cut material strip into the gap.

[0015] Optionally, the pushing member is a pushing plate, the pushing plate has a pushing end for abutting against the material strip to push the free end into the gap, and the pushing end has a chamfer.

[0016] By providing a chamfer on the pushing end of the pushing member for contacting the material strip, the pushing end can be made more rounded, thereby avoiding scratching the material strip.

[0017] Optionally, the fixing member is a clamping member having a clamping end, and the clamping end is used to move toward or away from the first half needle to clamp or loosen the free end between the clamping end and the first half needle.

[0018] By moving the clamping end toward the first half needle, the free end can be clamped between the clamping end and the first half needle after being pushed into the gap. In this way, the free end of the material strip pushed into the gap can be prevented from sliding out of the gap again.

[0019] Optionally, the clamping member is a cylinder, the clamping end is the free end of the piston rod of the cylinder, there are multiple cylinders, and the multiple cylinders are arranged at intervals on the second half needle along the axial direction of the winding needle.

[0020] By increasing the number of cylinders and arranging the multiple cylinders at intervals along the axial direction of the winding needle on the second half needle, when the clamping ends of the multiple cylinders simultaneously move toward the first half needle, the free ends of the piston rods of the multiple cylinders can simultaneously clamp the free ends between the free ends of the multiple piston rods and the first half needle, thereby making the free end of the material strip more stably fixed in the gap, thereby better preventing the free end of the material strip pushed into the gap from sliding out of the gap again.

[0021] Optionally, a clearance opening is provided on the pushing member, and the clearance opening passes through the pushing member along the movement direction of the clamping end, so that the clamping end passes through the clearance opening to clamp the free end between the clamping end and the first half needle.

[0022] When the clamping end moves toward the first half needle to clamp the free end between the clamping end and the first half needle, the avoidance opening allows the clamping end to pass through the pushing member, thereby avoiding interference between the pushing member and the clamping member.

[0023] Optionally, an adsorption hole is provided on the first half needle, and the adsorption hole is used to adsorb the material tape pushed into the gap onto the first half needle.

[0024] By setting an adsorption hole on the first half needle and making the pressure in the adsorption hole negative, the purpose of adsorbing the material strip pushed into the gap to the first half needle can be achieved. The implementation method is very simple, and therefore, the structure of the entire winding mechanism can be simplified to a certain extent.

[0025] Optionally, the winding mechanism further includes:

[0026] A tightening assembly is used to tighten the material strip before the cutter cuts the material strip.

[0027] By setting up a tensioning component, since the tensioning component can tighten the material tape before the cutter cuts the material tape, the cutter can cut the material tape more conveniently, avoiding the situation where the material tape becomes loose when cutting and the cutter cannot cut the material tape.

[0028] Optionally, the tensioning assembly includes:

[0029] Multiple rollers are located on both sides of the cutter along the circumference of the winding needle, and at least one of the multiple rollers is used to move toward the winding needle to press the material strip against the outer periphery of the winding needle to tighten the material strip, wherein at least one of the rollers that presses against the outer periphery of the winding needle is located upstream of the cutter.

[0030] By moving the multiple rollers toward the winding needle and bringing the web into contact with the outer circumference of the needle, the needle and the multiple rollers can form a structure similar to a clamp, thereby securing the web. In other words, simply by moving the multiple rollers toward the winding needle, the web can be secured by the multiple rollers, eliminating the need for specialized clamps. This results in a simple and ingenious structural design. Furthermore, because the multiple rollers act together on the same winding needle, the entire winding mechanism can be made relatively compact.

[0031] Optionally, each of the rollers is connected to the cutting drive, and the cutting drive is used to drive the cutter and each of the rollers to move synchronously in a direction close to the winding needle, so as to tighten the material strip through the roller before the cutter cuts the material strip.

[0032] By connecting each of the rollers to the cutting drive, the tensioning assembly and the cutter can share the same cutting drive, which can save costs and make the entire winding mechanism more compact.

[0033] Optionally, the roller is a unidirectional rotating roller, the rollers located on both sides of the cutter rotate in opposite directions, and the rotation tangent direction of each roller at the contact point with the winding needle is away from the cutter.

[0034] Optionally, each of the rollers is elastically connected to the cutting drive member.

[0035] By elastically connecting the roller to the cutting drive, when each roller moves toward the winding needle and the material strip is clamped between the roller and the winding needle, the contact between the roller and the outer periphery of the winding needle is elastic contact, thereby avoiding the occurrence of violent collisions between the roller and the outer periphery of the winding needle.

[0036] Optionally, at least one of the first half needle and the second half needle is slidably arranged in a direction close to or away from the other to adjust the width of the gap.

[0037] By arranging at least one of the first and second half needles to slide toward or away from the other, the width of the gap can be flexibly adjusted. This allows for flexible adjustment of the gap width based on the thickness of the web, allowing the gap to accommodate webs of varying thicknesses. Furthermore, when the winding mechanism is used in a winding device to process a battery core, after the core is wound, at least one of the first and second half needles can slide toward the other, narrowing the gap. This loosens the contact between the inner periphery of the core and the outer periphery of the winding needle, facilitating removal of the core from the winding needle.

[0038] In a second aspect, the present application discloses a winding device, the winding device having a winding station and a blanking station, the winding device comprising:

[0039] Unwinding mechanism;

[0040] a turret, the turret being rotatably arranged;

[0041] The winding mechanism according to any one of the above-mentioned first aspects, wherein the number of the winding needles is at least two, and the plurality of winding needles are rotatably disposed on the turret;

[0042] The cutting assembly is arranged corresponding to the winding station, the unwinding mechanism is used to convey the material tape to the winding needle located at the winding station, the cutting drive is used to drive the pushing member and the cutter to move synchronously in the direction close to the winding needle located at the winding station, so as to cut the material tape by the cutter, the pushing member is used to push the free end of the cut material tape into the gap, the winding needle of the winding station is used to wind the material tape around the outer periphery of the winding needle when rotating, and the turret is used to rotate the winding needle located at the winding station to the unloading station and the winding needle located at the unloading station to the winding station when rotating.

[0043] Since the winding mechanism does not need to perform auxiliary actions such as retracting the winding needle into the winding needle seat and extending it from the winding needle seat when performing the needle insertion action, when the winding mechanism is used in the winding equipment, it can improve the efficiency of the winding equipment in processing the winding core to a certain extent, thereby making the efficiency of the winding equipment in processing the winding core higher.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] In the present application, when the pin insertion action is performed, since the pushing member and the cutter are both arranged on the cutting drive member, the cutting drive member can drive the pushing member to move in the direction close to the winding needle when driving the cutter to move in the positive direction of the axis in the direction diagram close to the winding needle to cut the material strip, so that the pushing member can push the free end of the cut material strip into the gap. Finally, the free end pushed into the gap can be fixed in the gap by the fixing member, which can prevent the free end of the material strip pushed into the gap from sliding out of the gap again. At this point, the pin insertion action is realized.

[0046] Based on this, when the winding mechanism is used in the scenario of processing the battery core, the above-mentioned material strip can be understood as the positive and negative electrode sheets and diaphragms of the core. Obviously, in the process of the cutting drive driving the cutter to cut the positive and negative electrode sheets and diaphragms, the pushing member can be driven to push the free ends of the cut positive and negative electrode sheets and diaphragms into the gap, thereby realizing the action of inserting the core needle. Compared with the related technology, before the needle insertion action is performed, it is necessary to first ensure that the winding needle is retracted in the winding needle seat, and when the needle insertion action is performed, the winding needle needs to be extended from the winding needle seat to complete the needle insertion action. The winding mechanism does not need to perform auxiliary actions (actions such as the winding needle retracting in the winding needle seat and extending from the winding needle seat). Therefore, when the winding mechanism is used in the winding equipment, it can improve the efficiency of the winding equipment in processing the core to a certain extent, thereby making the efficiency of the winding equipment in processing the core higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0048] FIG1 is a schematic diagram of the structure of a winding mechanism provided in an embodiment of the present application (the free end is not pushed into the gap);

[0049] Figure 2 is a schematic diagram of the structure of the winding mechanism in Figure 1 in another state (the free end is pushed into the gap);

[0050] FIG3 is a diagram showing the positional relationship between the second half needle and the pusher provided in an embodiment of the present application;

[0051] FIG4 is a schematic diagram of the structure of another winding mechanism provided in an embodiment of the present application (the free end is not pushed into the gap);

[0052] FIG5 is a schematic structural diagram of the winding mechanism in FIG4 in another state (the roller abuts against the winding needle);

[0053] FIG6 is a schematic diagram of the structure of a winding device provided in an embodiment of the present application.

[0054] Explanation of the main reference numerals: 1-winding needle; 11-first half needle; 12-second half needle; 121-adsorption hole; 13-gap; 2-cutting assembly; 21-cutting drive member; 22-pushing member; 221-pushing end; 222-avoidance; 2211-chamfer; 23-cutter; 24-pushing drive member; 3-fixing member; 31-clamping end; 4-tensioning assembly; 41-roller; 42-spring; 10-unwinding mechanism; 20-turret; 30-winding mechanism; A-material strip; B-free end; W1-winding station; W2-unloading station; F-rotation tangential direction. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0056] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0057] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0058] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0059] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0060] The technical solution of the present application will be further described below with reference to specific embodiments and drawings.

[0061] Example 1

[0062] Figure 1 is a schematic diagram of the structure of a winding mechanism shown in an embodiment of the present application (the free end is not pushed into the gap), and Figure 2 is a schematic diagram of the structure of the winding mechanism in Figure 1 in another state (the free end is pushed into the gap).

[0063] Referring to Figures 1 and 2 , the winding mechanism includes a winding needle 1, a cutting assembly 2, and a fixing member 3. The winding needle 1 comprises a first half needle 11 and a second half needle 12, which are spaced apart and arranged relative to each other to form a slit 13. The cutting assembly 2 comprises a cutting drive 21, a pusher 22, and a cutter 23. Both the pusher 22 and the cutter 23 are mounted on the cutting drive 21. The cutting drive 21 is used to drive the pusher 22 and the cutter 23 toward the winding needle 1 (in the positive direction of the X-axis in Figure 1 ) so that the cutter 23 can cut the material strip A. The pusher 22 is used to push the free end B of the cut material strip A into the slit 13. The fixing member 3 is used to secure the free end B pushed into the slit 13.

[0064] In the embodiment of the present application, when the pin insertion action is performed, since the pushing member 22 and the cutter 23 are both arranged on the cutting drive member 21, the cutting drive member 21 can drive the cutting member 23 to move in the direction close to the winding needle 1 (the positive direction of the X-axis in Figure 1) to cut the material strip A. In the process, the pushing member 22 can be driven to move in the direction close to the winding needle 1, so that the pushing member 22 can push the free end B of the cut material strip A into the gap 13. Finally, the free end B pushed into the gap 13 can be fixed in the gap 13 by the fixing member 3, which can prevent the free end B of the material strip A pushed into the gap 13 from sliding out of the gap 13 again. At this point, the pin insertion action is realized.

[0065] Based on this, when the winding mechanism is used in the scenario of processing the battery core, the above-mentioned material strip can be understood as the positive and negative electrode sheets and diaphragms of the core. Obviously, in the process of the cutting drive 21 driving the cutter 23 to cut the positive and negative electrode sheets and diaphragms, etc., the pushing member 22 can be driven to push the free ends B of the cut positive and negative electrode sheets and diaphragms into the gap 13, thereby realizing the action of inserting the core needle. Compared with the related art, before the needle insertion action is performed, it is necessary to first ensure that the winding needle is retracted in the winding needle seat, and when the needle insertion action is performed, the winding needle needs to be extended from the winding needle seat to complete the needle insertion action. The winding mechanism does not need to perform auxiliary actions (such as the winding needle retracting in the winding needle seat and extending from the winding needle seat). Therefore, when the winding mechanism is used in the winding equipment, it can improve the efficiency of the winding equipment in processing the core to a certain extent, thereby making the winding equipment more efficient in processing the core.

[0066] It is noteworthy that the aforementioned severing of the web A by the cutter 23 and the pushing member 22 by the free end B into the slit 13 can be achieved by the same cutting drive 21. In layman's terms, as the cutting drive 21 drives the pushing member 22 and the cutter 23 toward the winding needle 1, the cutter 23 first cuts the web A. As the cutting drive 21 continues to drive the pushing member 22 and the cutter 23 toward the winding needle 1, the pushing member 22 pushes the free end B of the severed web A into the slit 13. When the aforementioned severing of the web A by the cutter 23 and the pushing member 22 by the free end B into the slit 13 are achieved by the same cutting drive 21, the simultaneous movement of the cutter 23 and the pushing member 22 by the same cutting drive 21 can, on the one hand, further improve the efficiency of the winding apparatus in processing the core. On the other hand, since separate driving members are not required for the cutter 23 and the pushing member 22, the winding needle mechanism can be made more compact while also reducing its cost to a certain extent.

[0067] Of course, the cutter 23 cutting off the material strip A and the pusher 22 pushing the free end B into the gap 13 can be achieved by driving different drive members. When driven by different drive members, refer to Figures 1 and 2. In some embodiments, the cutting assembly 2 also includes: a pushing drive member 24, the pushing drive member 24 is arranged on the cutting drive member 21, and the pushing member 22 is arranged on the pushing drive member 24. The cutting drive member 21 is used to drive the pushing drive member 24 to move toward the direction close to the winding needle 1, so as to drive the pushing member 22 to move toward the direction close to the winding needle 1, and the pushing drive member 24 is used to drive the pushing member 22 to push the free end B of the cut material strip A into the gap 13.

[0068] With this arrangement, the function of cutting the material strip A can be realized by the cutting drive 21, and the function of pushing the free end B into the gap 13 can be realized by the pushing drive 24. Each function corresponds to its own drive, does not affect each other, and is more flexible.

[0069] It should be noted that the above-mentioned material strips are understood as the positive and negative electrode sheets and diaphragms of the core, which is only a possible understanding of the material strips when the winding mechanism is used in the scenario of processing the battery core, as shown in the embodiment of the present application. Of course, when the winding mechanism is used in the scenario of processing the battery core, the above-mentioned material strips can also be understood as one or more of the positive and negative electrode sheets and diaphragms, etc., and the embodiment of the present application does not limit this.

[0070] In addition, when the application scenario changes, the above-mentioned material tape can also be understood in other ways. For example, when the winding mechanism is used in the scenario of winding a plastic tape, the above-mentioned material tape can be understood as a plastic tape, etc. The embodiments of this application will no longer list the material tapes one by one.

[0071] The cutting drive 21 may be a cylinder or any other component capable of driving the pusher 22 and the cutter 23 to move synchronously toward the winding needle 1. For example, the cutting drive 21 may be an electric cylinder or a lead screw mechanism. The present embodiment does not limit the cutting drive 21. The pusher drive 24 may be similar to the cutting drive 21 and will not be described in detail in this embodiment.

[0072] In order to prevent the pushing member 22 from scratching the material strip A during the process of pushing the free end B of the material strip A into the gap 13, in some embodiments, referring to FIG. 2 , the pushing member 22 is a pushing plate having a pushing end 221 for abutting against the material strip A to push the free end B into the gap 13, and the pushing end 221 has a chamfer 2211.

[0073] By providing the pushing end 221 of the pushing member 22 for contacting the material strip A with a chamfer 2211 , the pushing end 221 can be made relatively rounded, thereby preventing the material strip A from being scratched.

[0074] The chamfer 2211 may be a rounded corner or a right angle, etc., which is not limited in this embodiment of the present application.

[0075] In some embodiments, referring to FIG2 , the fixing member 3 is a clamping member having a clamping end 31 , which is used to move toward or away from the first half needle 11 (the Y-axis direction in FIG2 ) to clamp or release the free end B between the clamping end 31 and the first half needle 11 .

[0076] By moving the clamping end 31 toward the first half needle 11, the free end B can be clamped between the clamping end 31 and the first half needle 11 after being pushed into the gap 13. In this way, the free end B of the material strip A pushed into the gap 13 can be prevented from sliding out of the gap 13 again.

[0077] When the fixing part 3 is a clamping part, since the free end B can be clamped or loosened between the clamping end 31 and the first half needle 11 through the clamping end 31 of the clamping part, the first half needle 11 is fully utilized as a partial structure for clamping the free end B. The implementation method is clever and can make the volume of the fixing part 3 smaller to a certain extent.

[0078] The clamping member can be understood as a cylinder, and when the clamping member is understood as a cylinder, the clamping end 31 can be understood as the free end of the piston rod of the cylinder. Of course, the clamping member can also be an electric cylinder, etc., which is not limited in this embodiment of the present application.

[0079] In some embodiments, referring to FIG. 2 , the clamping member may be provided on the second half needle 12 . Of course, the clamping member may also be provided at other positions, which is not limited in the embodiments of the present application.

[0080] In some embodiments, referring to FIG. 3 , there are multiple clamping members, which are spaced apart on the second half needle 12 along the axial direction of the winding needle 1 (the Z-axis direction in FIG. 3 ).

[0081] By making the number of clamping parts multiple and making the multiple clamping parts arranged at intervals on the second half needle 12 along the axial direction of the winding needle 1, when the clamping ends 31 of the multiple clamping parts simultaneously move toward the direction close to the first half needle 11, the clamping ends 31 of the multiple clamping parts can simultaneously clamp the free end B between the multiple clamping ends 31 and the first half needle 11, thereby making the free end B more stably fixed in the gap 13, thereby better preventing the free end B of the material strip A pushed into the gap 13 from sliding out of the gap 13 again.

[0082] The number of the clamping members can be four or five, etc., and the embodiment of the present application does not limit the number of the clamping members. Of course, the number of the clamping member can also be one, and the embodiment of the present application does not limit this.

[0083] In order to avoid interference between the pushing member 22 and the clamping member, in some embodiments, see Figure 3, an avoidance opening 222 is provided on the pushing member 22, and the avoidance opening 222 passes through the pushing member 22 along the movement direction of the clamping end 31 (Y-axis direction in Figure 3) so that the clamping end 31 can pass through the avoidance opening 222 to clamp the free end B between the clamping end 31 and the first half needle 11.

[0084] In this manner, when the clamping end 31 moves toward the first half needle 11 to clamp the free end B between the clamping end 31 and the first half needle 11, the avoidance opening 222 allows the clamping end 31 to pass through the pushing member 22, thereby avoiding interference between the pushing member 22 and the clamping member.

[0085] 2 and 3 , the avoidance opening 222 may be U-shaped. When the avoidance opening 222 is U-shaped, the avoidance opening 222 may pass through the pushing end 221 of the pushing member 22 along the movement direction of the pushing member 22 (the X-axis direction in FIG. 2 ), thereby allowing the avoidance opening 222 to have an opening along the movement direction of the pushing member 22, thereby better avoiding interference between the pushing member 22 and the clamping member during movement.

[0086] Of course, the avoidance opening 222 may also be in other possible shapes, for example, the avoidance opening 222 may also be circular or triangular, etc., and this embodiment of the present application does not limit this.

[0087] In order to better prevent the free end B of the material strip A pushed into the gap 13 from sliding out of the gap 13 again, in some embodiments, referring to FIG. 2 , an adsorption hole 121 (not shown in the figure) is provided on the first half needle 11, and the adsorption hole 121 is used to adsorb the material strip A pushed into the gap 13 to the first half needle 11.

[0088] By providing an adsorption hole 121 on the first half needle 11 and making the pressure in the adsorption hole 121 negative, the purpose of adsorbing the material strip A pushed into the gap 13 to the first half needle 11 can be achieved. The implementation method is very simple, and therefore, the structure of the entire winding mechanism can be simplified to a certain extent.

[0089] The number of the adsorption holes 121 can be multiple, and the shape can be circular or any other possible shape. The embodiment of the present application does not limit the number and shape of the adsorption holes 121.

[0090] In some embodiments, referring to FIG. 4 , the winding mechanism further includes: a tightening assembly 4 , which is used to tighten the material strip A before the cutter 23 cuts the material strip A.

[0091] By setting up the tensioning component 4, since the tensioning component 4 can tighten the material strip A before the cutter 23 cuts the material strip A, the cutter 23 can cut the material strip A more conveniently, avoiding the situation where the material strip A becomes loose when cutting the material strip A, resulting in the cutter 23 being unable to cut the material strip A.

[0092] Among them, there are many ways for the above-mentioned tensioning component 4 to tighten the material strip A. In one possible implementation method, referring to Figures 4 and 5, the tensioning component 4 includes: multiple rollers 41, multiple rollers 41 are located on both sides of the cutter 23 along the circumference of the winding needle 1, at least one of the multiple rollers 41 is used to move in the direction close to the winding needle 1 (the positive direction of the X-axis in Figure 5) to make the material strip A abut against the outer periphery of the winding needle 1 to tighten the material strip A, and at least one roller 41 abutting against the outer periphery of the winding needle 1 is located upstream of the cutter 23.

[0093] When at least one of the multiple rollers 41 moves toward the winding needle 1, it can bring the material strip A into contact with the outer circumference of the winding needle 1. Therefore, the material strip A is clamped between the roller 41 and the winding needle 1, thereby securing the material strip A. Furthermore, because the multiple rollers 41 are located on both sides of the cutter 23 along the circumference of the winding needle 1, the multiple rollers 41 can secure the material strip A on both sides of the cutter 23 along the circumference of the winding needle 1, thereby achieving the purpose of tightening the material strip A.

[0094] By moving the multiple rollers 41 toward the winding needle 1 and bringing the web A into contact with the outer periphery of the winding needle 1, the winding needle 1 and the multiple rollers 41 can form a plurality of claw-like structures, thereby securing the web A. In other words, simply by moving the multiple rollers 41 toward the winding needle 1, the web A can be secured by the multiple rollers 41, eliminating the need for specialized claws. This results in a simple and ingenious structural design. Furthermore, because the multiple rollers 41 act together on the same winding needle 1, the entire winding mechanism can be made relatively compact.

[0095] The upstream of the cutter 23 mentioned above means that when the winding mechanism is used in a winding device, and the winding device includes an unwinding mechanism 10 for conveying the material tape to the winding needle 1, the side of the cutter 23 close to the unwinding mechanism 10 is the upstream of the cutter 23.

[0096] The number of the rollers 41 can be two or three, etc., as long as the rollers 41 are located on both sides of the cutter 23 along the circumference of the winding needle 1. The embodiment of the present application does not limit the number of the rollers 41.

[0097] It should be noted that the above-mentioned roller 41 abuts the material strip A against the outer periphery of the winding needle 1 to tighten the material strip A. This is only one possible way of tightening the material strip A shown in the embodiment of the present application. When the winding needle 1 is small, the winding needle 1 may not provide a sufficient outer periphery for the roller 41 to abut. Therefore, an abutment plate can also be specially provided on the movement trajectory of the roller 41, and when the roller 41 moves toward the direction close to the winding needle 1, the material strip A can be abutted against the abutment plate. In this way, the purpose of tightening the material strip A can also be achieved. The embodiment of the present application does not limit the abutment position of the roller 41.

[0098] There are many ways to implement the above-mentioned tensioning component 4. In another possible implementation, the tensioning component 4 includes: multiple jaws, and the multiple jaws are located on both sides of the cutter 23 along the circumference of the winding needle 1. Each jaw is used to clamp the material strip A. In this way, when the jaws clamp the material strip A on both sides of the cutter 23 along the circumference of the winding needle 1, the purpose of tightening the material strip A can also be achieved. It is sufficient to be able to achieve the purpose of tightening the material strip A. The embodiment of the present application does not limit the specific implementation method of the tensioning component 4.

[0099] In some embodiments, referring to FIG5 , each roller 41 is connected to a cutting drive 21 , which is used to drive the cutter 23 and the roller 41 to move synchronously toward the winding needle 1 , so as to tighten the material strip A through the roller 41 before the cutter 23 cuts the material strip A.

[0100] By connecting each roller 41 to the cutting drive 21 , the tensioning assembly 4 and the cutter 23 can share the same cutting drive 21 , which can save costs and make the entire winding mechanism more compact.

[0101] Furthermore, when the cutting drive 21 drives the cutter 23 and the roller 41 to move synchronously toward the winding needle 1, the cutter 23 can simultaneously cut the material strip A while the roller 41 can tighten the material strip A. This allows the tightening and cutting of the material strip A to occur simultaneously, thereby further improving the processing efficiency of the winding mechanism. Consequently, when the winding mechanism is used in a winding device, the efficiency of the winding device in processing the core can be further improved.

[0102] In order to avoid the roller 41 rolling during the process of cutting the material strip A by the cutter 23, causing the material strip A to become loose and affecting the cutter 23 from cutting the material strip A well, in some embodiments, the roller 41 is a one-way rotating roller, and the rotation directions of the rollers 41 on both sides of the cutter 23 are opposite, and the rotation tangent direction F of each roller 41 at the contact point with the winding needle 1 is away from the cutter 23.

[0103] By making the rotational tangent direction F of each roller 41 at the contact point with the winding needle 1 face away from the cutter 23, the roller 41 can prevent the material strip A from sliding toward the cutter 23 during the process of the cutter 23 cutting the material strip A, so that the material strip A is always in a taut state, which makes it easier for the cutter 23 to cut the material strip A.

[0104] In some embodiments, referring to FIG4 , each roller 41 is elastically connected to the cutting drive 21. By elastically connecting the roller 41 to the cutting drive 21, when each roller 41 moves toward the winding needle 1 and the material strip A is clamped between the roller 41 and the winding needle 1, the contact between the roller 41 and the periphery of the winding needle 1 is elastic contact, thereby avoiding the occurrence of violent collisions between the roller 41 and the periphery of the winding needle 1.

[0105] Specifically, referring to FIG. 4 , the roller 41 may be elastically connected to the cutting drive 21 via a spring 42 , or may be elastically connected to the cutting drive 21 via other possible elastic elements, which is not limited in the embodiment of the present application.

[0106] In some embodiments, at least one of the first half needle 11 and the second half needle 12 is slidably disposed in a direction close to or away from the other to adjust the width of the gap 13 .

[0107] By arranging at least one of the first half needle 11 and the second half needle 12 to slide toward or away from the other, the width of the gap 13 can be flexibly adjusted. This allows for flexible adjustment of the width of the gap 13 based on the thickness of the material strip A, allowing the gap 13 to accommodate material strips of varying thicknesses. Furthermore, when the winding mechanism is used in a winding device to produce a battery core, after the core is wound, at least one of the first half needle 11 and the second half needle 12 can slide toward the other, narrowing the gap 13. This loosens the contact between the inner circumference of the core and the outer circumference of the winding needle, facilitating removal of the core from the winding needle.

[0108] Example 2

[0109] FIG6 is a schematic structural diagram of a winding device shown in an embodiment of the present application.

[0110] 2 and 6 , the winding device has a winding station W1 and a blanking station W2 , and includes an unwinding mechanism 10 , a turret 20 and a winding mechanism 30 . Among them, the turret 20 is rotatably arranged, the number of winding needles 1 is at least two, and multiple winding needles 1 can be rotatably arranged on the turret 20, the cutting assembly 2 is arranged corresponding to the winding station W1, the unwinding mechanism 10 is used to convey the material strip A to the winding needle 1 located at the winding station W1, and the cutting drive member 21 is used to drive the pushing member 22 and the cutter 23 to move toward the direction close to the winding needle 1 located at the winding station W1, so as to cut the material strip A through the cutter 23, and the pushing member 22 is used to push the free end B of the cut material strip A into the gap 13. The winding needle 1 of the winding station W1 is used to wind the material strip A around the outer periphery of the winding needle 1 when rotating, and the turret 20 is used to rotate the winding needle 1 located at the winding station W1 to the unloading station W2, and rotate the winding needle 1 located at the unloading station W2 to the winding station W1 when rotating.

[0111] Among them, the structure of the winding mechanism 30 can be the same as the structure of any winding mechanism 30 in the above-mentioned embodiment 1, and can bring the same or similar beneficial effects. For details, please refer to the description of the winding mechanism 30 in the above-mentioned embodiment 1. The embodiment of this application does not limit this.

[0112] In the embodiment of the present application, when the winding device is processing the battery core, first, the material strip A can be conveyed to the winding needle 1 located at the winding station W1 through the unwinding mechanism 10, and then, the pushing member 22 and the cutter 23 can be driven by the cutting drive member 21 to move toward the direction close to the winding needle 1 located at the winding station W1, so that the material strip A can be cut by the cutter 23 and the free end B of the cut material strip A can be pushed into the gap 13 through the pushing member 22. After the free end B of the material strip A is pushed into the gap 13, the free end B pushed into the gap 13 can be fixed in the gap 13 by the fixing member 3 to prevent the free end B of the material strip A pushed into the gap 13 from sliding out of the gap 13 again. Then, since the winding needle 1 is rotatably arranged on the turret 20, when the winding needle 1 rotates relative to the turret 20, the material strip A can be gradually wound around the outer periphery of the winding needle 1 located at the winding station W1.

[0113] When the winding amount of the material strip A reaches a preset amount, since the turret 20 is rotatably arranged, the turret 20 can be rotated, and then the winding needle 1 located at the winding station W1 can be rotated to the unloading station W2, and the winding needle 1 located at the unloading station W2 can be rotated to the winding station W1. After the winding needle 1 located at the winding station W1 rotates to the unloading station W2, the core on the winding needle 1 can be removed from the winding needle 1 for unloading. After the winding needle 1 located at the unloading station W2 rotates to the winding station W1, the material strip A can be conveyed to the winding needle 1 through the unwinding mechanism 10, and the cutting drive 21 can drive the pusher 22 and the cutter 23 to move synchronously toward the direction of the winding needle 1 located at the winding station W1, so as to cut the material strip A through the cutter 23 and push the free end B of the cut material strip A into the gap 13 through the pusher 22, so that the winding needle 1 can wind the core, and all the above actions are performed in a cycle.

[0114] Since the winding mechanism 30 does not need to perform auxiliary actions (such as the winding needle retracting into the winding needle seat and extending from the winding needle seat) when performing the needle insertion action, when the winding mechanism is used in the winding equipment, it can improve the efficiency of the winding equipment in processing the winding core to a certain extent, thereby making the efficiency of the winding equipment in processing the winding core higher.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A winding mechanism, characterized in that: The winding mechanism comprises: A winding needle (1), the winding needle (1) comprising a first half needle (11) and a second half needle (12), the first half needle (11) and the second half needle (12) being arranged opposite to each other at an interval to form a gap (13); A cutting assembly (2), the cutting assembly (2) comprising a cutting drive member (21), a pushing member (22) and a cutter (23), the pushing member (22) and the cutter (23) being both arranged on the cutting drive member (21), the cutting drive member (21) being used for driving the pushing member (22) and the cutter (23) to move in a direction close to the winding needle (1), so as to cut the material strip (A) by the cutter (23), and the pushing member (22) being used for pushing the free end (B) of the cut material strip (A) into the slit (13); A fixing member (3), wherein the fixing member (3) is used to fix the free end (B) pushed into the slit (13) in the slit (13).

2. The winding mechanism according to claim 1, characterized in that: The cutting assembly (2) further comprises: A pushing drive member (24), wherein the pushing drive member (24) is arranged on the cutting drive member (21), and the pushing member (22) is arranged on the pushing drive member (24). The cutting drive member (21) is used to drive the pushing drive member (24) to move in a direction close to the winding needle (1), so as to drive the pushing member (22) to move in a direction close to the winding needle (1). The pushing drive member (24) is used to drive the pushing member (22) to push the free end (B) of the cut material strip (A) into the gap (13).

3. The winding mechanism according to claim 1, characterized in that: The pushing member (22) is a pushing plate, and the pushing plate has a pushing end (221) for abutting against the material strip (A) to push the free end (B) into the gap (13), and the pushing end (221) has a chamfer (2211).

4. The winding mechanism according to claim 1, characterized in that: The fixing member (3) is a clamping member having a clamping end (31). The clamping end (31) is used to move toward or away from the first half needle (11) to clamp or release the free end (B) between the clamping end (31) and the first half needle (11).

5. The winding mechanism according to claim 4, characterized in that: The clamping member is a cylinder, the clamping end (31) is the free end of the piston rod of the cylinder, the number of the cylinders is multiple, and the multiple cylinders are arranged on the second half needle (12) at intervals along the axial direction of the winding needle (1).

6. The winding mechanism according to claim 4, characterized in that: The pushing member (22) is provided with an escape opening (222), and the escape opening (222) penetrates the pushing member (22) along the movement direction of the clamping end (31), so that the clamping end (31) passes through the escape opening (222) to clamp the free end (B) between the clamping end (31) and the first half needle (11).

7. The winding mechanism according to any one of claims 1 to 6, characterized in that: The first half needle (11) is provided with an adsorption hole (121), and the adsorption hole (121) is used to adsorb the material strip (A) pushed into the gap (13) onto the first half needle (11).

8. The winding mechanism according to any one of claims 1 to 6, characterized in that: The winding mechanism also includes: A tensioning assembly (4), wherein the tensioning assembly (4) is used to tension the material strip (A) before the cutter (23) cuts the material strip (A).

9. The winding mechanism according to claim 8, characterized in that: The tensioning assembly (4) comprises: A plurality of rollers (41) are provided, wherein the plurality of rollers (41) are located on both sides of the cutter (23) along the circumference of the winding needle (1), and at least one of the plurality of rollers (41) is used to move in a direction close to the winding needle (1) so as to bring the material strip (A) into contact with the outer periphery of the winding needle (1) to tighten the material strip (A), wherein at least one of the rollers (41) that is in contact with the outer periphery of the winding needle (1) is located upstream of the cutter (23).

10. The winding mechanism according to claim 9, characterized in that: Each of the rollers (41) is connected to the cutting drive (21), and the cutting drive (21) is used to drive the cutter (23) and each of the rollers (41) to move synchronously in a direction close to the winding needle (1), so as to tighten the material strip (A) through the rollers (41) before the cutter (23) cuts the material strip (A).

11. The winding mechanism according to claim 9, characterized in that: The roller (41) is a unidirectional rotating roller. The rollers (41) located on both sides of the cutter (23) rotate in opposite directions, and the rotation tangent direction (F) of each roller (41) at the point where it abuts against the winding needle (1) is away from the cutter (23).

12. The winding mechanism according to claim 9, characterized in that: Each of the rollers (41) is elastically connected to the cutting drive member (21).

13. The winding mechanism according to any one of claims 1 to 6, characterized in that: At least one of the first half needle (11) and the second half needle (12) is slidably arranged in a direction approaching or moving away from the other to adjust the width of the gap (13).

14. A winding device, characterized in that: The winding device has a winding station (W1) and a material unloading station (W2), and the winding device includes: Unwinding mechanism (10); A turret (20), wherein the turret (20) is rotatably arranged; The winding mechanism (30) according to any one of claims 1 to 13, wherein the number of the winding needles (1) is at least two, and at least two of the winding needles (1) are rotatably disposed on the turret (20); The cutting assembly (2) is arranged corresponding to the winding station (W1), the unwinding mechanism (10) is used to convey the material tape (A) to the winding needle (1) located at the winding station (W1), the cutting driving member (21) is used to drive the pushing member (22) and the cutting knife (23) to move in a direction close to the winding needle (1) located at the winding station (W1), so as to cut the material tape (A) by the cutting knife (23), and the pushing member (2 2) is used to push the free end (B) of the cut material strip (A) into the gap (13); the winding needle (1) of the winding station (W1) is used to wind the material strip (A) around the outer periphery of the winding needle (1) when rotating; the turret (20) is used to rotate the winding needle (1) located at the winding station (W1) to the unloading station (W2), and rotate the winding needle (1) located at the unloading station (W2) to the winding station (W1) when rotating.

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