Winding equipment

Abstract

The invention relates to winding equipment. The winding equipment comprises a winding needle mechanism which comprises a winding needle and a cutter, the winding needle is provided with a peripheral face and a containing concave part formed in the peripheral face, the winding needle can be controlled to rotate so as to wind a material belt to the peripheral face, the cutter is arranged in the containing concave part, the peripheral face is provided with an adsorption area located on the upstream side of the containing concave part, and the adsorption area is located on the upstream side of the containing concave part; the adsorption area is configured to controllably adsorb a passing material belt; the material pressing mechanism comprises a rolling assembly and a material pushing assembly, the rolling assembly is used for pressing the material belt to the peripheral face in an abutting mode, the material pushing assembly comprises a rotating part and a material pushing part arranged on the rotating part, the rotating part can controllably rotate to drive the material pushing part to rotate to be opposite to the containing concave part on the peripheral face, and the material pushing part is used for feeding the material belt into the containing concave part; the cutter is used for cutting off the material belt entering the containing concave part.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing equipment, and specifically to a winding device. Background Art

[0002] The battery cell is an important component of the battery and can be made by winding each layer of material strip (for example, four layers of material strips including a separator, an anode electrode sheet, a separator and a cathode electrode sheet).

[0003] In the prior art, each layer of material tape is brought together by the film-joining mechanism and then enters the winding needle located in the first station for winding. After the winding needle located in the first station winds one battery cell, it switches to the second station, and the other winding needle switches to the first station. At this time, after each layer of material tape is brought together by the film-joining mechanism and passes through the first station, the winding needle located in the first station extends from the turret to complete the tape threading (that is, the material tape is inserted into the slit of the winding needle). Then, the inner clamping needle in the winding needle clamps the material tape, and then the cutting knife located between the first station and the second station cuts the material tape. Then, the winding needle located in the first station starts to wind the next battery cell. In summary, the action process of the winding operation in the prior art is complicated, which leads to a complex structure of the winding equipment and low production efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a winding device that can simplify the structure and improve production efficiency to address the above problems.

[0005] A winding device, comprising:

[0006] A winding needle mechanism, comprising a winding needle and a cutting knife, wherein the winding needle has an outer peripheral surface and a receiving recessed portion opened on the outer peripheral surface, the winding needle can be controlled to rotate to wind the material strip onto the outer peripheral surface, the cutting knife is arranged in the receiving recessed portion, the outer peripheral surface has an adsorption area located on the upstream side of the receiving recessed portion, and the adsorption area is configured to controllably adsorb the material strip passing by; and

[0007] The material pressing mechanism includes a roller pressing assembly and a pushing assembly, wherein the roller pressing assembly is used to press the material strip against the outer peripheral surface, and the pushing assembly includes a rotating part and a pushing part arranged on the rotating part, and the rotating part can rotate in a controlled manner to drive the pushing part to rotate to be opposite to the receiving recess on the outer peripheral surface, the pushing part is used to feed the material strip into the receiving recess, and the cutter is used to cut off the material strip entering the receiving recess.

[0008] In some embodiments, the winding needle has a vacuum cavity inside, and the vacuum cavity is used to communicate with an external negative pressure source. The adsorption area is provided with a plurality of adsorption holes connected with the vacuum cavity.

[0009] In some embodiments, a plurality of cavities are provided inside the winding needle, and the cavities and the vacuum chamber are arranged at intervals along the circumference of the winding needle. A heating plate is provided on the inner wall of each cavity and the vacuum chamber close to the outer peripheral surface.

[0010] In some embodiments, a plurality of through holes are formed on the heating plate in the vacuum chamber, and each of the through holes is connected to a corresponding adsorption hole.

[0011] In some embodiments, the needle winding mechanism further comprises an electrical integrated slip ring, the rotor of the electrical integrated slip ring is fixedly connected to the needle winding, the stator of the electrical integrated slip ring has a first vacuum joint and a first conductive joint, the first vacuum joint is used to communicate with an external negative pressure source through a gas pipeline, and the first conductive joint is used to communicate with an external power source through a conductive line;

[0012] The rotor of the electrical integrated slip ring has a second vacuum joint connected to the first vacuum joint and a second conductive joint electrically connected to the first conductive joint, the second vacuum joint is connected to the vacuum chamber through a vacuum tube, and the second conductive joint is electrically connected to each of the heating plates through a wire.

[0013] In some embodiments, the cutter is a hot cutter.

[0014] In some embodiments, the cutter is provided with a mounting hole, and a heating element is inserted into the mounting hole.

[0015] In some embodiments, two pushing parts are provided on the rotating part, and the two pushing parts are arranged at intervals along the rotating direction of the rotating part so that a gap is formed between the two pushing parts;

[0016] When the two material pushing parts send the passing material belt into the receiving recess, the gap is used to receive the cutting knife.

[0017] In some embodiments, the pushing assembly also includes a fixed seat, a mounting seat and a first elastic member. The mounting seat is arranged on the fixed seat and can be controlled to move closer to or away from the winding needle relative to the fixed seat. The first elastic member abuts between the fixed seat and the mounting seat to provide a pre-tightening force that causes the mounting seat to have a movement tendency close to the winding needle. The rotating part is arranged on the mounting seat and can be controlled to rotate relative to the mounting seat.

[0018] In some embodiments, the rolling assembly includes a first rolling assembly having a first pressing roller rotatable around its own axis, and the first rolling assembly can controllably drive the first pressing roller to press a portion of the material strip located upstream of the cutter against the adsorption area.

[0019] In some embodiments, the rolling assembly also includes a second rolling assembly, which has a second pressing roller rotatable around its own axis, and the second rolling assembly can controllably drive the second pressing roller to press the portion of the material strip located downstream of the cutter against the outer peripheral surface.

[0020] When the above-mentioned winding equipment is actually used, the material strip is transported downstream at a certain speed and passes through the first station. At the first station, the winding needle keeps rotating around its own axis, and the roller assembly presses the material strip against the outer peripheral surface of the winding needle, so that the adsorption area of ​​the winding needle adsorbs and fixes the material strip. At the same time, the rotating part drives the pushing part to rotate. When the rotating part drives the pushing part and the receiving recess to be relative to each other, the pushing part pushes the passing material strip into the receiving recess, so that the material strip entering the receiving recess is cut by the cutter. At this time, the upstream cut end formed after the material strip is cut is adsorbed and fixed on the outer peripheral surface of the winding needle by the adsorption area, and the winding needle continues to rotate around its own axis, so that the material strip is wound onto the outer peripheral surface of the winding needle to form a winding core. That is to say, in the process that the rolling assembly presses the material strip against the outer peripheral surface of the winding needle and the pushing part pushes the passing material strip into the receiving recess of the winding needle, the winding needle always keeps rotating around its own axis, the material strip also keeps being transported downstream, the rotating part keeps rotating to drive the pushing part to rotate, and the passing material strip is cut in flight under the cooperation of the pushing part and the cutter.

[0021] In this way, when the material strip does not stop being transported downstream, the rotation of the winding needle and the rotating part drives the pushing part and the receiving recess on the winding needle to face each other. At this time, the pushing part pushes the passing material strip into the receiving recess on the winding needle, so that the cutter in the receiving recess cuts the material strip, that is, the material strip is cut on the fly. The upstream cut end formed after the material strip is cut is adsorbed and fixed by the adsorption area on the winding needle, so that the material strip A is wound onto the outer peripheral surface of the winding needle to form a winding core. In this process, the material strip also keeps being transported downstream, and the winding needle keeps rotating. There is no need to stop the conveyance of the material strip or the rotation of the winding needle. On the one hand, it saves the waiting time for starting and stopping the equipment, greatly improving the production efficiency; on the other hand, it eliminates the actions such as threading and film combining, greatly simplifying the structure of the winding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a winding device in one embodiment of the present application;

[0023] Figure 2 for Figure 1 The structural schematic diagram of the material pressing mechanism and the winding needle mechanism of the winding device shown;

[0024] Figure 3 for Figure 1 A cross-sectional view of a winding needle mechanism of the winding device shown;

[0025] Figure 4 for Figure 1 A side view of the winding needle mechanism of the winding device shown;

[0026] Figure 5 for Figure 2 The structural schematic diagram of the rotating part and the pushing part of the pressing mechanism shown;

[0027] Figure 6 for Figure 1 The structural schematic diagram of the pressing mechanism of the winding equipment is shown. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0034] See also Figures 1 to 3 The present application provides a winding device, including a winding needle mechanism 10 and a material pressing mechanism 20. The winding needle mechanism 10 includes a winding needle 11 and a cutting knife 12. The winding needle 11 has an outer peripheral surface 110 (see Figure 3 ) and a receiving recess 111 (see Figure 3). The winding needle 11 can be rotated in a controlled manner to wind the material strip A onto the outer circumferential surface 110 of the winding needle 11. The cutter 12 is arranged in the receiving recess 111 of the winding needle 11, so that the cutter 12 rotates synchronously with the winding needle 11. There is an adsorption area 1101 on the outer circumferential surface 110 of the winding needle 11, and the adsorption area 1101 is located on the upstream side of the receiving recess 111, and is configured to controllably adsorb and fix the material strip A passing through. The pressing mechanism 20 includes a roller pressing assembly 21 and a pushing assembly 22. The roller pressing assembly 21 is used to press the material strip A onto the outer circumferential surface 110 of the winding needle 11, and the pushing assembly 22 includes a rotating part 221 and a pushing part 222 arranged on the rotating part 221. The rotating part 221 can be rotated in a controlled manner to drive the pushing part 222 to rotate to be opposite to the receiving recess 111 on the outer circumferential surface 110 of the winding needle 11 located at the first station a1. The material pushing portion 222 is used to push the material strip A into the receiving recess 111 , so that the cutter 12 cuts the material strip A entering the receiving recess 111 .

[0035] When the winding device is actually used, the material strip A is transported downstream at a certain speed and passes through the first station a1. At the first station a1, the winding needle 11 keeps rotating around its own axis, and the roller assembly 21 presses the material strip A against the outer peripheral surface 110 of the winding needle 11, so that the adsorption area 1101 of the winding needle 11 adsorbs and fixes the material strip A. At the same time, the rotating part 221 drives the pushing part 222 to rotate. When the rotating part 221 drives the pushing part 222 and the receiving recess 111 to face each other, the pushing part 222 pushes the passing material strip A into the receiving recess 111, so that the material strip A entering the receiving recess 111 is cut by the cutter 12. At this time, the upstream cut end formed after the material strip A is cut is adsorbed and fixed on the outer peripheral surface 110 of the winding needle 11 by the adsorption area 1101, and the winding needle 11 keeps rotating around its own axis, so that the material strip A is wound onto the outer peripheral surface 110 of the winding needle 11 to form a winding core 100. That is to say, in the process that the rolling assembly 21 presses the material strip A against the outer peripheral surface 110 of the winding needle 11 and the pushing portion 222 pushes the passing material strip A into the receiving recess 111 of the winding needle 11, the winding needle 11 always keeps rotating around its own axis, the material strip A also keeps being transported downstream, the rotating portion 221 keeps rotating to drive the pushing portion 222 to rotate, and the passing material strip A is cut in flight under the cooperation of the pushing portion 222 and the cutter 12.

[0036] In this way, when the material strip A does not stop being transported downstream, the rotation of the winding needle 11 and the rotating part 221 drives the pushing part 222 and the receiving recess 111 on the winding needle 11 to face each other. At this time, the pushing part 222 pushes the passing material strip A into the receiving recess 111 on the winding needle 11, so that the cutter 12 in the receiving recess 111 cuts the material strip A, that is, the material strip A is cut. The upstream cut end formed after the material strip A is cut is adsorbed and fixed by the adsorption area 1101 on the winding needle 11, so that the material strip A is wound onto the outer peripheral surface 110 of the winding needle 11 to form a winding core 100. In this process, the material strip A also keeps being transported downstream, and the winding needle 11 keeps rotating. There is no need to stop the transport of the material strip A or the rotation of the winding needle 11. On the one hand, the waiting time for starting and stopping the equipment is saved, which greatly improves the production efficiency; on the other hand, the actions such as needle threading and film joining are eliminated, which greatly simplifies the structure of the winding equipment.

[0037] It should be noted that in the prior art, the cutter is arranged on the outside of the winding needle. In order to realize the flying cutting of the material strip A, it is necessary to use the rotating shaft to drive the cutter to rotate. On the one hand, it will make the structure of the winding equipment more complicated. On the other hand, if the rotation speed of the cutter and the winding needle does not match, it is easy to cause the cutter to directly contact the winding needle and damage the winding needle. Therefore, it is necessary to accurately control the rotation speed of the cutter and the winding needle, which requires high precision and is difficult to control.

[0038] In the present application, since the cutter 12 is arranged in the accommodating recess 111 on the winding needle 11, it can be ensured that the cutter 12 rotates together with the winding needle 11. On the one hand, the installation structure of the cutter 12 is simple, and the driving mechanism for driving the cutter 12 to rotate and move is omitted, which is conducive to further simplifying the structure of the winding equipment; on the other hand, the cutter 12 always rotates together with the winding needle 11, avoiding the phenomenon that the cutter 12 damages the winding needle 11 due to the mismatch of the rotation speed of the cutter 12 and the winding needle 11.

[0039] It is understandable that after the cutter 12 cuts the material strip A passing through, an upstream cut end located upstream and a downstream cut end located downstream are formed at the fracture of the material strip A. The downstream cut end is separated from the upstream cut end as the downstream material strip A is transported downstream. Under the adsorption action of the adsorption area 1101 on the winding needle 11, the upstream cut end is adsorbed and fixed on the outer peripheral surface 110 of the winding needle 11, so that the winding needle 11 can wind the material strip A. The upstream and downstream in this article are both relative to the conveying direction of the material strip A, that is, in the process of conveying the material strip A downstream, the position where the material strip A arrives first is the upstream, and the position where it arrives later is the downstream.

[0040] Specifically in the embodiment, the outer peripheral surface 110 of the winding needle 11 is recessed inward to form a groove, which serves as the above-mentioned receiving recess 111. The depth dimension of the receiving recess 111 is greater than the dimension of the cutter 12 in the depth direction of the receiving recess 111, so as to prevent the cutter 12 from extending out of the receiving recess 111 and contacting other components to cause damage.

[0041] In the embodiment of the present application, the interior of the winding needle 11 has a vacuum chamber B, and the vacuum chamber B is used to communicate with an external negative pressure source. A plurality of adsorption holes 1102 connected to the vacuum chamber B are provided in the adsorption area 1101 on the outer peripheral surface 110 of the winding needle 11. In this way, the external negative pressure source evacuates the vacuum chamber B, thereby generating negative pressure at each adsorption hole 1102, and then uses the negative pressure at each adsorption hole 1102 to adsorb and fix the passing material strip A to the adsorption area 1101 on the outer peripheral surface 110. When it is necessary to release the adsorption of the material strip A, the external negative pressure source stops evacuating the vacuum chamber B, so that the vacuum in the vacuum chamber B is broken, and the negative pressure at each adsorption hole 1102 disappears, thereby releasing the adsorption and fixation of the material strip A.

[0042] It should be noted that, compared with the prior art solution of clamping and fixing the upstream cut end of the material strip A on the winding needle 11 by setting a clamping mechanism inside the winding needle 11, the present application uses vacuum adsorption to adsorb and fix the upstream cut end of the material strip A on the outer peripheral surface 110 of the winding needle 11, which greatly simplifies the structure of the winding needle 11 and makes the adsorption response to the upstream cut end of the material strip A rapid, accurate and reliable.

[0043] Specifically, in the embodiment, a plurality of cavities C are provided inside the winding needle 11, and the cavities C and the vacuum chamber B are arranged at intervals along the circumference of the winding needle 11. A heating sheet 115 is provided on the inner wall of each cavity C and vacuum chamber B close to the outer peripheral surface 110, so that the outer peripheral surface 110 of the winding needle 11 is heated by each heating sheet 115, and then the winding core 100 wound on the outer peripheral surface 110 of the winding needle 11 is heated, so that each layer of the material strip A of the winding core 100 is softened and the viscosity is improved, so as to improve the adhesion firmness between each layer of the material strip A of the winding core 100, which is conducive to reducing the risk of voids inside the winding core 100 when the winding core 100 is subsequently hot-pressed or cold-pressed.

[0044] Furthermore, a plurality of through holes 1151 are provided on the heating plate 115 located in the vacuum chamber B, and each through hole 1151 is connected to the corresponding adsorption hole 1102, so that each adsorption hole 1102 is connected to the vacuum chamber B through the corresponding through hole 1151, thereby preventing the heating plate 115 from blocking each adsorption hole 1102 and making it impossible to adsorb the material strip A.

[0045] See also Figure 3 and Figure 4Specifically in the embodiment, the winding needle mechanism 10 also includes an electrical integrated slip ring 13, and the rotor 132 of the electrical integrated slip ring 13 is fixedly connected to the winding needle 11, so that the rotor 132 of the electrical integrated slip ring 13 can rotate synchronously with the winding needle 11. The stator 131 of the electrical integrated slip ring 13 has a first vacuum joint b1 and a first conductive joint c1, and the first vacuum joint b1 is used to communicate with an external negative pressure source through a gas pipeline, and the first conductive joint c1 is used to communicate with an external power source through a conductive line. The rotor 132 of the electrical integrated slip ring 13 has a second vacuum joint b2 connected to the above-mentioned first vacuum joint b1 and a second conductive joint c2 electrically connected to the above-mentioned first conductive joint c1. The second vacuum joint b2 is connected to the vacuum chamber B through a vacuum tube, and the second conductive joint c2 is electrically connected to each heating plate 115 through a wire. In this way, the external negative pressure source is connected to the vacuum chamber B through the first vacuum joint b1, the stator 131 of the electrical integrated slip ring 13, the rotor 132 of the electrical integrated slip ring 13, and the second vacuum joint b2 in sequence, so that the external negative pressure source can evacuate the vacuum chamber B. The external power source is electrically connected to each heating plate 115 through the first conductive joint c1, the stator 131 of the electrical integrated slip ring 13, the rotor 132 of the electrical integrated slip ring 13, and the second conductive joint c2 in sequence, so that the external power source can provide electrical energy to each heating plate 115.

[0046] In the embodiment of the present application, the winding needle 11 includes a winding needle shaft 112 and a first outer needle 113 and a second outer needle 114 arranged on the winding needle shaft 112. The first outer needle 113 and the second outer needle 114 are arranged opposite to each other, and the outer side walls that are away from each other are pieced together to form the above-mentioned outer peripheral surface 110. A groove is provided on the outer side wall of the first outer needle 113 away from the second outer needle 114, and the groove serves as the above-mentioned receiving recess 111. In this way, the receiving recess 111 for receiving the cutter 12 is formed by grooving on the outer side wall of the first outer needle 113 away from the second outer needle 114, which greatly simplifies the structure of the winding needle 11.

[0047] Furthermore, each adsorption hole 1102 is provided on the outer side wall of the first outer needle 113 away from the second outer needle 114, and each adsorption hole 1102 is located on the upstream side of the receiving recess 111. The vacuum chamber B is located inside the first outer needle 113 so as to be connected with each adsorption hole 1102. One or more cavities C are provided inside the first outer needle 113 and the second outer needle 114 so as to provide a heating plate 115 in each cavity C, and then each heating plate 115 is used to heat the outer side walls (i.e., the outer peripheral surface 110) of the first outer needle 113 and the second outer needle 114 away from each other.

[0048] Optionally, the first outer needle 113 and the second outer needle 114 are configured to be controllably close to or away from each other relative to the winding needle shaft 112, so as to adjust the radial dimension of the outer peripheral surface 110 of the winding needle 11. Further, a gap D is formed between the first outer needle 113 and the second outer needle 114, and the gap D is used for the clamping needle that clamps the winding core 100 wound on the outer peripheral surface 110 to be inserted. In this way, when winding is required, the first outer needle 113 and the second outer needle 114 are controlled to move away from each other, thereby increasing the radial size of the outer peripheral surface 110; when the core 100 needs to be unloaded after the winding is completed, the clamping needle is inserted into the gap D between the first outer needle 113 and the second outer needle 114 and the core 100 is clamped; then the first outer needle 113 and the second outer needle 114 are controlled to move closer to each other, thereby reducing the radial size of the outer peripheral surface 110, so that the first outer needle 113 and the second outer needle 114 are in a relaxed state with the core 100; then the winding needle 11 is controlled to move axially to be pulled out of the core 100, thereby realizing the unloading of the core 100.

[0049] It should be noted that the assembly structure between the first outer needle 113 and the second outer needle 114 and the winding needle shaft 112 can adopt relatively mature existing technologies, as long as the first outer needle 113 and the second outer needle 114 can be moved closer to or farther away from each other relative to the winding needle shaft 112, without any special limitation.

[0050] It should also be noted that the above-mentioned receiving recess 111 is not limited to being opened on the first outer needle 113. In other embodiments, the receiving recess 111 may also be opened on the second outer needle 114. Of course, in some other embodiments, the receiving recess 111 may also be opened on both the first outer needle 113 and the second outer needle 114. No special limitation is made here.

[0051] Specifically in the embodiment, the above-mentioned cutter 12 can be a hot cutter 12. On the one hand, it ensures that the material strip A passing through can be cut off. On the other hand, in actual use, the material strip A passing through the hot cutter 12 is two layers. After the two layers of material strip A are cut by the hot cutter 12, the upstream cut ends of the two layers of material strip A are bonded together due to heat, so that the upstream cut ends of the two layers of material strip A can be better adsorbed and fixed by the adsorption area 1101, avoiding the phenomenon that only one layer of material strip A is adsorbed and fixed, while the other layer of material strip A is not adsorbed and fixed.

[0052] Optionally, the cutter 12 is provided with a mounting hole (not marked in the figure), and a heating element 121 is passed through the mounting hole, so that the cutter 12 is heated by the heating element 121, and the cutter 12 is further made to perform hot cutting on the material strip A passing through.

[0053] Furthermore, the cutter 12 extends longitudinally along the axial direction of the winding needle 11, and the length of the cutter 12 is greater than the width of the material strip A, thereby ensuring that the cutter 12 can cut the material strip A passing along the width direction of the material strip A. The mounting hole on the cutter 12 extends along the longitudinal direction of the cutter 12, and the heating element 121 adopts a long strip-shaped heating rod, which is inserted into the mounting hole, so that the heating rod can heat the cutter 12 at various positions in the longitudinal direction more evenly, avoiding the phenomenon of the cutter 12 having a local temperature that is too high or too low.

[0054] Optionally, the cutter 12 includes a cutter seat 123 and a blade 125 fixedly connected to the cutter seat 123. The cutter seat 123 is fixedly connected to the above-mentioned receiving recess 111, and the blade 125 is located on the side of the cutter seat 123 facing the opening of the receiving recess 111. The above-mentioned mounting hole is provided on the cutter seat 123, and the heating element 121 is inserted into the mounting hole on the cutter seat 123. The heat generated by the heating element 121 is transferred to the blade 125 through the cutter seat 123, so that the blade 125 performs heat cutting on the material strip A entering the receiving recess 111. It should be noted that the heating element 121 can also be electrically connected to an external power source through the above-mentioned electrical integrated slip ring 13. Specifically, the second conductive connector c2 is electrically connected to the heating element 121 through a wire, so that the external power supply is electrically connected to the heating element 121 through the first conductive connector c1, the stator 131 of the electrical integrated slip ring 13, the rotor 132 of the electrical integrated slip ring 13 and the second conductive connector c2, thereby enabling the external power supply to provide electrical energy to the heating element 121.

[0055] Please also see Figure 5 In the embodiment of the present application, two pusher parts 222 are provided on the rotating part 221, and the two pusher parts 222 are arranged at intervals along the rotating direction of the rotating part 221, so that a gap B is formed between the two pusher parts 222. When the two pusher parts 222 send the passing material strip A into the receiving recess 111, the gap B between the two pusher parts 222 is used to receive the cutter 12, so as to avoid the cutter 12 from colliding with the pusher parts 222.

[0056] See also Figure 1 and Figure 6 As shown, specifically in the embodiment, the pusher assembly 22 also includes a fixed seat 223, a mounting seat 224 and a first elastic member 225. The mounting seat 224 is arranged on the fixed seat 223, and can be controlled to move closer to or away from the winding needle 11 located at the first station a1 relative to the fixed seat 223. The first elastic member 225 abuts between the fixed seat 223 and the mounting seat 224 to provide a pre-tightening force that makes the mounting seat 224 have a movement tendency to move closer to the winding needle 11 located at the first station a1. The rotating portion 221 is arranged on the mounting seat 224, and can be controlled to rotate relative to the mounting seat 224.

[0057] Thus, in actual use, the rotating part 221 is controlled to rotate relative to the mounting seat 224, thereby driving the pusher part 222 to rotate. At the same time, the mounting seat 224 is controlled to be close to the winding needle 11 located at the first station a1 relative to the fixed seat 223, thereby driving the rotating part 221 and the pusher part 222 on the rotating part 221 to be close to the winding needle 11 located at the first station a1. Under the combined action of the rotating part 221 driving the pusher part 222 to rotate and the winding needle 11 located at the first station a1 rotating around its own axis, the pusher part 222 and the receiving recess 111 on the winding needle 11 are made to face each other, and then, driven by the mounting seat 224, the pusher part 222 pushes the passing material strip A into the receiving recess 111, so that the cutter 12 in the receiving recess 111 cuts the material strip A, that is, the material strip A is cut. After the material strip A is cut, the mounting seat 224 is controlled to move relative to the fixed seat 223 toward the direction away from the winding needle 11 located at the first station a1, thereby driving the rotating part 221 and the pushing part 222 on the rotating part 221 to gradually move away from the winding needle 11 located at the first station a1.

[0058] It should be noted that when the equipment is abnormally operated, resulting in a mismatch between the rotation speed of the rotating part 221 and the winding needle 11 located at the first station a1, the pusher part 222 will directly abut against the outer peripheral surface 110 of the winding needle 11. Due to the presence of the first elastic member 225, the first elastic member 225 can buffer the impact force between the pusher part 222 and the outer peripheral surface 110 of the winding needle 11 through its own deformation, thereby preventing the pusher part 222 from causing a hard impact on the winding needle 11 and damaging the winding needle 11. Optionally, the first elastic member 225 can be a spring.

[0059] It should be noted that the mounting seat 224 can be mounted on the fixed seat 223 via a guide structure such as a guide rail or a guide rod, so that the movement of the mounting seat 224 relative to the fixed seat 223 is guided by the guide structure, ensuring that the movement of the rotating part 221 and the pushing part 222 on the rotating part 221 toward or away from the winding needle 11 located at the first station a1 is more stable and reliable. The guide structure can adopt relatively mature existing technologies, as long as it can play a guiding role, and is not particularly limited here.

[0060] Furthermore, the pusher assembly 22 further includes a first driving member 227, which is drivingly connected to the mounting seat 224, so that the first driving member 227 can drive the mounting seat 224 to move closer to or away from the winding needle 11 located at the first station a1 relative to the fixed seat 223. It should be noted that the first driving member 227 can adopt a linear driving module, as long as it can provide power for the movement of the mounting seat 224 relative to the fixed seat 223, and is not limited here.

[0061] Further, the pusher assembly 22 further includes a second driving member 226, which is mounted on the mounting seat 224 and is drivingly connected to the rotating portion 221, so that the second driving member 226 can drive the rotating portion 221 to rotate relative to the mounting seat 224. It should be noted that the second driving member 226 can be a rotating driving member such as a motor, as long as it can provide power for the rotation of the rotating portion 221 relative to the mounting seat 224, and is not limited here.

[0062] It should be noted that, in some embodiments, the rotating portion 221 may be a rotating roller, which is mounted on the mounting seat 224 via a bearing, so that the rotating roller can rotate around its own axis relative to the mounting seat 224. The material pushing portion 222 may be a protrusion convexly arranged on the roller surface of the rotating roller. Since the material pushing portion 222 protrudes from the roller surface of the rotating roller, when the rotating roller approaches the winding needle 11, the material pushing portion 222 can push the passing material strip A into the receiving recess 111 on the winding needle 11.

[0063] In the embodiment of the present application, the rolling assembly 21 includes a first rolling assembly 21a and a second rolling assembly 21b. The first rolling assembly 21a has a first pressing roller 211a that can rotate around its own axis, and the first rolling assembly 21a can controllably drive the first pressing roller 211a to press the portion of the material strip A located upstream of the cutter 12 onto the adsorption area 1101 of the winding needle 11 located at the first station a1. The second rolling assembly 21b has a second pressing roller 211b that can rotate around its own axis, and the second rolling assembly 21b can controllably drive the second pressing roller 211b to press the portion of the material strip A located downstream of the cutter 12 onto the outer peripheral surface 110 of the winding needle 11 located at the first station a1. In this way, before the cutter 12 cuts the material strip A, the material strip A passing upstream and downstream of the cutter 12 is pressed against the outer peripheral surface 110 of the winding needle 11 located at the first station a1, thereby ensuring that the cutter 12 can accurately cut the passing material strip A, which is beneficial to improving the cutting quality.

[0064] It should be noted that, since the first rolling assembly 21a drives the first pressing roller 211a to press the portion of the material strip A located upstream of the cutter 12 onto the adsorption area 1101 of the winding needle 11, after the material strip A is cut by the cutter 12, the upstream cut end of the material strip A is adsorbed and fixed on the adsorption area 1101 of the winding needle 11, ensuring that the winding needle 11 can wind the material strip A onto the outer peripheral surface 110 to form a winding core 100.

[0065] It can be understood that since the first pressing roller 211a of the first rolling assembly 21a and the second pressing roller 211b of the second rolling assembly 21b are both rotatable around their own axes, when the first pressing roller 211a and the second pressing roller 211b respectively press the passing material strip A onto the winding needle 11 located at the first station a1, under the traction action of the downstream, the material strip A can pass between the first pressing roller 211a and the winding needle 11 located at the first station a1 and between the second pressing roller 211b and the winding needle 11 located at the first station a1 and be transported downstream. That is to say, in the process of using the cutter 12 to cut the passing material strip A, the winding needle 11 rotates around its own axis and drives the cutter 12 to rotate together, the rotating part 221 drives the pushing part 222 to rotate, and the material strip A between the pushing part 222 and the winding needle 11 is also transported downstream, and the rotation speed of the rotating part 221, the rotation speed of the winding needle 11 and the conveying speed of the material strip A downstream are matched to ensure that the three speeds are consistent at the moment when the pushing part 222 sends the material strip A into the receiving recess 111 and is cut by the cutter 12, so that the pushing part 222 can accurately send the material strip A into the receiving recess 111, and the cutter 12 can accurately and quickly cut the material strip A.

[0066] It should be noted that, in some embodiments, the first rolling assembly 21a is mounted on the mounting seat 224, so that when the first driving member 227 drives the mounting seat 224 to approach or move away from the winding needle 11 located at the first station a1, the mounting seat 224 can drive the material pushing assembly 22 and the first rolling assembly 21a to approach or move away from the winding needle 11 located at the first station a1. In other words, the first rolling assembly 21a and the material pushing assembly 22 share the same driving member, and there is no need to configure an additional driving member for the first rolling assembly 21a, which greatly simplifies the equipment structure, reduces the space required, and reduces the difficulty of spatial layout of the components of the material pressing mechanism 20.

[0067] Specifically in the embodiment, the first rolling assembly 21a includes a first mounting frame 212a and a second elastic member 213a. The first mounting frame 212a is movably connected to the mounting seat 224 through a first guide rod, and the first pressing roller 211a is rotatably connected to the first mounting frame 212a. The second elastic member 213a abuts between the mounting seat 224 and the first mounting frame 212a to provide an elastic force that causes the first mounting frame 212a to have a movement tendency relative to the mounting seat 224 to approach the winding needle 11 located at the first station a1. In this way, when the first driving member 227 drives the mounting seat 224 to approach the winding needle 11 located at the first station a1, the first pressing roller 211a first presses the passing material strip A against the adsorption area 1101 of the winding needle 11 located at the first station a1, and as the mounting seat 224 continues to approach the winding needle 11, the mounting seat 224 drives the material pushing portion 222 to push the passing material strip A into the receiving recess 111. Optionally, the second elastic member 213a may be a compression spring.

[0068] During actual use, when the first driving member 227 drives the mounting seat 224 to approach the winding needle 11 located at the first station a1, the first rolling assembly 21a and the rotating part 221 approach the winding needle 11 located at the first station a1 together, and the first pressing roller 211a of the first rolling assembly 21a first presses the passing material strip A onto the winding needle 11 located at the first station a1, and the pushing part 222 on the rotating part 221 pushes the passing material strip A into the receiving recess 111 of the winding needle 11 and is cut by the cutter 12. Then, the first driving member 227 drives the mounting seat 224 away from the winding needle 11 located at the first station a1. Driven by the mounting seat 224, the material pushing portion 222 first withdraws from the receiving recess 111 of the winding needle 11. Then, the first pressing roller 211a of the first rolling assembly 21a separates from the winding needle 11 located at the first station a1, that is, the first pressing roller 211a releases the pressure on the passing material strip A (at this time, the upstream cut end of the material strip A is adsorbed and fixed on the adsorption area 1101 of the winding needle 11). At the same time, as the winding needle 11 located at the first station a1 continues to rotate, the material strip A is wound onto the outer peripheral surface 110 of the winding needle 11.

[0069] Of course, in other embodiments, the first rolling assembly 21a may not be arranged on the mounting seat 224, and a driving member may be provided to independently drive the first rolling assembly 21a to approach or move away from the winding needle 11 located at the first station a1, which is not limited here.

[0070] It should be noted that, in some embodiments, the second rolling assembly 21b is also mounted on the mounting seat 224, so that when the first driving member 227 drives the mounting seat 224 to approach or move away from the winding needle 11 located at the first station a1, the mounting seat 224 can drive the pushing assembly 22 and the second rolling assembly 21b to approach or move away from the winding needle 11 located at the first station a1. In other words, the second rolling assembly 21b and the pushing assembly 22 share the same driving member, and there is no need to configure an additional driving member for the second rolling assembly 21b, which greatly simplifies the equipment structure, reduces the space required, and reduces the difficulty of spatial layout of the components of the pressing mechanism 20.

[0071] Specifically in the embodiment, the second rolling assembly 21b includes a second mounting frame 212b and a third elastic member 213b. The second mounting frame 212b is movably connected to the mounting seat 224 through a second guide rod, and the second pressing roller 211b is rotatably connected to the second mounting frame 212b. The third elastic member 213b abuts between the mounting seat 224 and the second mounting frame 212b to provide an elastic force that causes the second mounting frame 212b to have a movement tendency relative to the mounting seat 224 to approach the winding needle 11 located at the first station a1. Thus, when the first driving member 227 drives the mounting seat 224 to approach the winding needle 11 located at the first station a1, the second pressing roller 211b first presses the passing material strip A against the outer peripheral surface 110 of the winding needle 11 located at the first station a1, and as the mounting seat 224 continues to approach the winding needle 11, the mounting seat 224 drives the material pushing portion 222 to push the passing material strip A into the receiving recess 111 of the winding needle 11, so that the material strip A is cut by the cutter 12 in the receiving recess 111. Optionally, the third elastic member 213b can be a compression spring.

[0072] During actual use, when the first driving member 227 drives the mounting seat 224 to approach the winding needle 11 located at the first station a1, the second rolling assembly 21b and the pushing portion 222 approach the winding needle 11 located at the first station a1 together, and the second pressing roller 211b of the second rolling assembly 21b first presses the passing material strip A against the outer peripheral surface 110 of the winding needle 11 located at the first station a1, and the mounting seat 224 then drives the pushing portion 222 to push the passing material strip A into the receiving recess 111 of the winding needle 11, so that the material strip A is cut by the cutter 12 in the receiving recess 111. After the material strip A is cut, the first driving member 227 drives the mounting seat 224 away from the winding needle 11 located at the first station a1. Driven by the mounting seat 224, the pushing portion 222 first withdraws from the accommodating recess 111, and then the second pressing roller 211b of the second rolling assembly 21b is separated from the winding needle 11 located at the first station a1, that is, the second pressing roller 211b releases the pressure on the passing material strip A.

[0073] Of course, in other embodiments, the second rolling assembly 21b may not be arranged on the mounting seat 224, and a driving member may be provided to independently drive the second rolling assembly 21b to approach or move away from the winding needle 11 located at the first station a1, which is not limited here.

[0074] Please continue to see Figure 1As shown, in the embodiment of the present application, the winding device further includes a turret 30, and the number of the winding needle mechanisms 10 is at least two. The turret 30 is rotatably arranged, and the winding needles 11 of each winding needle mechanism 10 are rotatably connected to the turret 30 through the winding needle shaft 112. The winding needles 11 of each winding needle mechanism 10 pass through the first station a1 and the second station a2 in sequence during the rotation of the turret 30. When the winding needle 11 located at the first station a1 rotates to the second station a2 with the turret 30, another winding needle 11 rotates to the first station a1 with the turret 30.

[0075] In this way, when the winding core 100 on the winding needle 11 at the first station a1 is completed, first, the material strip A continues to be transported downstream, and the turret 30 drives the winding needle 11 at the first station a1 to rotate to the second station a2, and another winding needle 11 rotates to the first station a1 with the turret 30. At this time, the winding needle 11 at the first station a1 rotates around its own axis, and at the same time, the first rolling assembly 21a drives the first pressing roller 211a to press the part of the material strip A located upstream of the cutter 12 onto the adsorption area 1101 of the winding needle 11 located at the first station a1, and the second rolling assembly 21b drives the second pressing roller 211b to press the part of the material strip A located downstream of the cutter 12 onto the outer peripheral surface 110 of the winding needle 11 located at the first station a1. The rotating part 221 moves close to the winding needle 11 located at the first station a1, and at the same time, the rotating part 221 drives the pushing part 222 thereon to rotate, and the winding needle 11 located at the first station a1 rotates, so that when the pushing part 222 on the rotating part 221 and the receiving recess 111 on the winding needle 11 are opposite to each other, the pushing part 222 pushes the passing material strip A into the receiving recess 111, and then the cutter 12 in the receiving recess 111 cuts the material strip A. At this time, the upstream cut end of the material strip A is adsorbed and fixed on the adsorption area 1101 of the winding needle 11 located at the first station a1.

[0076] After the material strip A is cut by the cutter 12, the rotating part 221 gradually moves away from the winding needle 11 located at the first station a1 under the driving action of the first driving member 227, so that the pushing part 222 on the rotating part 221 exits the receiving recess 111 on the winding needle 11. Then, the first rolling assembly 21a drives the first pressing roller 211a to leave the winding needle 11 located at the first station a1. Then, after the winding needle 11 located at the first station a1 winds the material strip A onto its outer peripheral surface 110 for at least one circle, the second rolling assembly 21b drives its second pressing roller 211b to leave the winding needle 11 located at the first station a1. In this process, the winding needle 11 located at the first station a1 continues to rotate to wind the material strip A onto its outer peripheral surface 110 to form a winding core 100.

[0077] After the material strip A is cut by the cutter 12, the winding needle 11 located at the second station a2 continues to wind until the cut material strip A is completely wound onto its outer peripheral surface 110, and then the winding core 100 on the winding needle 11 located at the second station a2 is subjected to actions such as affixing finishing tape and / or unloading.

[0078] It should be noted that, in some other embodiments, the winding needle 11 of each winding needle mechanism 10 may also pass through the third station a3 during the process of rotating with the turret 30. That is to say, the winding needle 11 of each winding needle mechanism 10 passes through the first station a1, the second station a2 and the third station a3 in sequence during the process of rotating with the turret 30. The winding needle 11 winds the material strip A conveyed upstream to form a winding core 100 at the first station a1. The winding needle 11 adheres the finishing glue to the winding core 100 on the winding needle 11 at the second station a2, so as to prevent the winding core 100 on the winding needle 11 from being loose. The winding needle 11 unloads the winding core 100 on the winding needle 11 at the third station a3. In the embodiment where the winding needle 11 passes through three stations (i.e., the first station a1, the second station a2, and the third station a3), the winding operation steps of the winding device are similar to those in the embodiment where the winding needle 11 passes through two stations (i.e., the first station a1 and the second station a2), so they will not be repeated here.

[0079] It should be noted that the winding operation steps described above are only used as an implementation method. Of course, in other implementation methods, other winding operation steps can also be used, as long as the winding forming core 100 can be achieved, and no limitation is made here.

[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A winding device, characterized in that: include: The winding needle mechanism comprises a winding needle and a cutting knife, wherein the winding needle has an outer peripheral surface and a receiving recessed portion provided on the outer peripheral surface, the winding needle can be controlled to rotate to wind the material strip onto the outer peripheral surface, the cutting knife is arranged in the receiving recessed portion, the outer peripheral surface has an adsorption area located on the upstream side of the receiving recessed portion, and the adsorption area is configured to controllably adsorb the material strip passing by; and The material pressing mechanism includes a roller pressing assembly and a pushing assembly, wherein the roller pressing assembly is used to press the material strip against the outer peripheral surface, and the pushing assembly includes a rotating part and a pushing part arranged on the rotating part, and the rotating part can rotate in a controlled manner to drive the pushing part to rotate to be opposite to the receiving recess on the outer peripheral surface, the pushing part is used to feed the material strip into the receiving recess, and the cutter is used to cut off the material strip entering the receiving recess.

2. The winding device according to claim 1, characterized in that The winding needle has a vacuum cavity inside, and the vacuum cavity is used to communicate with an external negative pressure source. The adsorption area is provided with a plurality of adsorption holes that are connected with the vacuum cavity.

3. The winding device according to claim 2, characterized in that A plurality of cavities are also provided inside the winding needle, and the cavities and the vacuum chambers are arranged at intervals along the circumference of the winding needle. A heating plate is provided on the inner wall of each cavity and the vacuum chamber close to the outer peripheral surface.

4. The winding device according to claim 3, characterized in that The heating plate in the vacuum chamber is provided with a plurality of through holes, and each of the through holes is communicated with the corresponding adsorption hole.

5. The winding device according to claim 3, characterized in that The needle winding mechanism further includes an electrical integrated slip ring, the rotor of which is fixedly connected to the needle winding, and the stator of which is provided with a first vacuum joint and a first conductive joint, wherein the first vacuum joint is used to communicate with an external negative pressure source through a gas pipeline, and the first conductive joint is used to communicate with an external power source through a conductive line; The rotor of the electrical integrated slip ring has a second vacuum joint connected to the first vacuum joint and a second conductive joint electrically connected to the first conductive joint, the second vacuum joint is connected to the vacuum chamber through a vacuum tube, and the second conductive joint is electrically connected to each of the heating plates through a wire.

6. The winding device according to claim 1, characterized in that The cutter is a hot cutter.

7. The winding device according to claim 6, characterized in that The cutter is provided with a mounting hole, and a heating element is inserted into the mounting hole.

8. The winding device according to claim 1, characterized in that The rotating part is provided with two pushing parts, and the two pushing parts are arranged at intervals along the rotating direction of the rotating part so that a gap is formed between the two pushing parts; When the two material pushing parts send the passing material belt into the receiving recess, the gap is used to receive the cutting knife.

9. The winding device according to claim 1, characterized in that The pusher assembly also includes a fixed seat, a mounting seat and a first elastic member. The mounting seat is arranged on the fixed seat and can be controlled to move closer to or away from the winding needle relative to the fixed seat. The first elastic member abuts between the fixed seat and the mounting seat to provide a pre-tightening force that makes the mounting seat have a movement tendency to approach the winding needle. The rotating part is arranged on the mounting seat and can be controlled to rotate relative to the mounting seat.

10. The winding device according to claim 1, characterized in that The rolling assembly includes a first rolling assembly having a first pressing roller rotatable around its own axis. The first rolling assembly can controllably drive the first pressing roller to press a portion of the material strip located upstream of the cutter onto the adsorption area.

11. The winding device according to claim 1, characterized in that The rolling assembly also includes a second rolling assembly having a second pressing roller rotatable around its own axis. The second rolling assembly can controllably drive the second pressing roller to press the portion of the material strip located downstream of the cutter against the outer peripheral surface.

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