External needle nozzle mechanism and winding device

Abstract

The present application relates to an external needle nozzle mechanism and a winding device, wherein the external needle nozzle mechanism includes a rotating disk; a limiting disk, which is spaced apart from the rotating disk, and a needle pulling structure is provided on the side of the limiting disk facing the rotating disk; an ejector assembly, which includes an ejector, which is eccentrically inserted into the rotating disk; and an elastic member, wherein the two ends of the elastic member are respectively connected to the rotating disk and the ejector, and when in the needle threading state, the elastic member is used to push the ejector to abut the limiting disk, and when in the needle pulling state, the elastic member is used to push the ejector to extend to the needle pulling structure. The external needle nozzle mechanism in the present application maintains the needle threading state of the ejector by providing an elastic member and a limiting disk, which contacts the ejector through the side of the limiting disk, and can also extend the ejector into the needle pulling structure by the elastic force of the elastic member so that the ejector automatically pulls out the needle, so that the ejector can automatically pull out and thread the needle as the rotating disk rotates. The structure of the external needle nozzle is simplified, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing equipment, and in particular to an external needle nozzle mechanism and a winding device. Background Art

[0002] At present, the mainstream forming forms of battery cells include winding forming and stacking forming. During the battery cell winding process, the end of the diaphragm is connected to the winding needle, and the electrode and diaphragm are wound as the winding needle rotates.

[0003] Generally, in order to facilitate the removal of the winding needle from the wound battery cell, the winding needle is usually designed to be split, and before winding, a push pin is inserted between the two split winding needles to separate the two split winding needles. After the winding is completed, the push pin is pulled out from between the two split winding needles to leave a needle removal gap, so that the split winding needles can be pulled out from the battery cell separately.

[0004] In related technology, in multi-station winding equipment, the workstations are generally divided into winding, gluing, and unloading. Three sets of winding needles switch between the three stations as the winding head revolves. In addition, a rotating disk is coaxially connected to the winding head and rotates with it. The rotating disk is equipped with three sets of ejectors to act on the three sets of winding needles respectively. When the battery cell is wound, the winding needle assembly revolves to the unloading station. At this time, the ejector pins are first pulled out of the two separate winding needles, and then the separate winding needles are pulled out of the battery cell to complete the winding process of the battery cell.

[0005] However, when pulling out the ejector pin from between the two split winding needles, a corresponding external needle pulling mechanism for pulling out the ejector pin needs to be set up at the unloading station. It is necessary to design a complete power system to drive the ejector pin to be pulled out, and the power system needs to be connected with other moving parts of the winding equipment. Therefore, the method of pulling out the ejector pin in the related art is relatively complicated and the cost is relatively high. Summary of the Invention

[0006] The embodiments of the present application provide an outer needle nozzle mechanism and a winding device to solve the technical problem that the method of removing the ejector pin in the related art is relatively complicated and costly.

[0007] In a first aspect, an outer needle nozzle mechanism is provided, comprising:

[0008] Turn the disk;

[0009] A limiting disk is spaced apart from the rotating disk, and a needle pulling structure is provided on the side of the limiting disk facing the rotating disk;

[0010] An ejector assembly, comprising an ejector pin, wherein the ejector pin is eccentrically disposed on the rotating disk;

[0011] An elastic member, wherein both ends of the elastic member are respectively connected to the rotating disk and the ejector pin. In the needle threading state, the elastic member is used to push the ejector pin so that it abuts the limit disk. In the needle pulling state, the elastic member is used to push the ejector pin so that it extends to the needle pulling structure.

[0012] In some embodiments, the needle pulling structure includes a needle pulling groove, which is located on the rotation path of the ejector pin, and the side of the limiting disk facing the rotating disk transitions to the bottom of the needle pulling groove in an arc.

[0013] In some embodiments, the needle pulling structure includes a needle pulling notch, the needle pulling notch is located on the rotation path of the ejector pin, and a side wall of the needle pulling notch is arranged at an obtuse angle to the side surface of the limiting disk facing the rotating disk.

[0014] In some embodiments, the outer needle nozzle mechanism further includes a roller, which is rotatably connected to the ejector pin and rolls on the limiting disk.

[0015] In some embodiments, the ejector assembly further includes a syringe, and the syringe includes:

[0016] The first needle cylinder is inserted into the rotating disk and is rotatably connected to the rotating disk. The first needle cylinder is provided with a support hole. The ejector pin is inserted into the first needle cylinder through the support hole.

[0017] In some embodiments, the syringe further includes a second syringe, the second syringe is fixedly inserted into the rotating disk, and the first syringe is inserted into the second syringe and is rotatably connected to the second syringe.

[0018] In some embodiments, the ejector pin includes a needle body and a needle handle, the needle handle is connected to the tail end of the needle body, the elastic member includes a spring, one end of the spring is connected to the second needle cylinder, and the other end of the spring abuts against the needle handle.

[0019] In some embodiments, the ejector pin includes a needle head, and the needle head is configured in a cone shape.

[0020] In some embodiments, the ejector pin further includes a support sleeve, and a gap is left between the circumferential inner side surface of the support sleeve and the circumferential side surface of the needle head.

[0021] The beneficial effects of the technical solution provided by this application include:

[0022] An embodiment of the present application provides an external needle nozzle mechanism, and when the rotating disk of the external needle nozzle mechanism rotates with the winding head, the thimble can switch the working position with the revolution of the rotating disk. One end of the thimble is inserted between the two split winding needles to separate the two split winding needles, and the other end of the thimble abuts on the limit disk. When the thimble revolves, the thimble slides on the limit disk. When the thimble slides to the needle pulling structure, the elastic force of the elastic member can push the thimble into the needle pulling structure to drive the thimble to leave the two split winding needles and realize automatic needle pulling. When the thimble further revolves to disengage from the needle pulling structure and abuts against the side of the limit disk, the elastic member is compressed at this time, and the thimble can be inserted between the two split winding needles to realize automatic needle threading. Therefore, the external needle nozzle mechanism can realize automatic needle threading and needle pulling of the thimble, without the need to design a power device to drive the thimble to move, which simplifies the structure of the external needle nozzle and reduces costs.

[0023] In a second aspect, a winding device is provided, comprising the outer needle nozzle mechanism as described above.

[0024] Another embodiment of the present application provides a winding device. Since it includes the external needle nozzle mechanism described above, the beneficial effects of the winding device are consistent with the beneficial effects of the external needle nozzle mechanism described above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 description of 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 any creative work.

[0026] Figure 1 A schematic diagram of the outer needle nozzle mechanism provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of a limit plate provided in an embodiment of the present application;

[0028] Figure 3 Schematic diagram of the internal structure of the outer needle nozzle mechanism provided in an embodiment of the present application.

[0029] In the figure: 1. Rotating disk; 2. Limiting disk; 201. Needle pulling structure; 3. Ejector assembly; 301. Ejector; 3011. Needle body; 3011a. First needle body; 3011b. Second needle body; 3012. Needle head; 3013. Needle handle; 3014. Support sleeve; 302. Syringe; 3021. First needle cylinder; 3022. Second needle cylinder; 3023. Cover body; 302a. Support hole; 4. Elastic member; 5. Roller; 6. Split winding needle. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are 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.

[0031] The present invention provides an external needle nozzle mechanism and winding device. The external needle nozzle mechanism utilizes an elastic member and a limiting disk. The limiting disk's side surface contacts the ejector pin, maintaining the ejector pin in a threading position. Furthermore, the elastic force of the elastic member allows the ejector pin to extend into a needle extraction mechanism, automatically extracting the ejector pin. Thus, the ejector pin can automatically extract and thread the needle as the rotating disk rotates. This invention addresses the technical issues of the related art, where the ejector pin extraction method is complex and costly.

[0032] Reference Figure 1 , an external needle nozzle mechanism, including: a rotating disk 1, a limiting disk 2, a thimble assembly 3 and an elastic member 4.

[0033] Reference Figure 1 , wherein the rotating disk 1 is coaxially fixed with the winding head (not shown in the figure) of the winding equipment, and the rotating disk 1 can rotate together with the winding head. The limiting disk 2 is spaced apart from the rotating disk 1 and fixed to the external frame. The limiting disk 2 is located on the rear side of the rotating disk 1, and the rear side of the limiting disk 2 is the side of the limiting disk 2 facing away from the winding head. In this embodiment, the limiting disk 2 is disc-shaped, and the axis of the limiting disk 2 is consistent with the axis of the rotating disk 1.

[0034] Reference Figure 1 and Figure 3 The ejector assembly 3 includes an ejector pin 301, which is eccentrically inserted into the rotating disk 1. The axial direction of the ejector pin 301 is aligned with the axial direction of the rotating disk 1, so that the ejector pin 301 can revolve as the rotating disk 1 rotates. During winding, the ejector pin 301 is inserted between the two split winding needles 6 to separate the two split winding needles 6. The number of ejector pin assemblies 3 is consistent with the number of groups of split winding needles 6 in the winding equipment. In this embodiment, the ejector pin assemblies 3 include three groups, and the three groups of ejector pin assemblies 3 are evenly distributed around the axis of the rotating disk 1.

[0035] Reference Figure 1 and Figure 3 The two ends of the elastic member 4 are connected to the rotating disk 1 and the ejector pin 301 respectively. The number of the elastic members 4 is set corresponding to the number of the ejector pin assemblies 3. In this embodiment, the number of the elastic members 4 is 3.

[0036] Reference Figure 1 and Figure 3During winding, the ejector pin 301 is in a threading state, one end of the ejector pin 301 extends between the two split winding needles 6 , and the other end of the ejector pin 301 abuts against the limit plate 2 under the action of the elastic member 4 .

[0037] Reference Figure 1-Figure 3 Furthermore, a needle pulling structure 201 is provided on the side of the limiting disk 2 facing the rotating disk 1. In the needle pulling state, the ejector pin 301 rotates with the rotating disk 1 to the needle pulling structure 201, and the elastic force of the elastic member 4 pushes the ejector pin 301 into the needle pulling structure 201. The needle pulling structure 201 leaves space for the ejector pin 301 to pull out the needle. After the winding is completed, when unloading is required, the ejector pin 301 revolves to the needle pulling structure 201, and the ejector pin 301 is moved away from the two split winding needles 6 under the action of the elastic member 4, so as to be pulled out from between the two split winding needles 6, thereby realizing automatic needle pulling.

[0038] Reference Figure 1 and Figure 2 In this embodiment, the needle pulling structure 201 includes a needle pulling groove, which is a fan-shaped groove with a central angle of 120 degrees. The needle pulling groove is provided on the side of the limiting disk 2, and the needle pulling groove is located on the movement path of the ejector pin 301 following the rotation of the rotating disk 1. The bottom of the needle pulling groove and the limiting disk 2 transition to the side arc of the rotating disk 1. The ejector pin 301 can slide along the groove wall of the needle pulling groove to the bottom of the needle pulling groove to realize the needle pulling operation; the ejector pin 301 can also leave the needle pulling groove along the groove wall of the needle pulling groove and contact the side of the limiting disk 2 to realize the needle threading operation.

[0039] In some embodiments, the needle pulling structure 201 also includes a needle pulling notch, which is a fan-shaped notch with a rounded angle of 120 degrees. The needle pulling notch is opened on the side of the limiting disk 2 and is set through, and the needle pulling notch is located on the movement path of the ejector pin 301 that follows the rotation of the rotating disk 1. The side wall of the needle pulling notch is set at an obtuse angle to the side of the limiting disk 2 facing the rotating disk 1, which can facilitate the ejector pin 301 to enter or leave the needle pulling notch along the side wall of the needle pulling notch. Due to the setting of the needle pulling notch, the ejector pin 301 at the needle pulling notch position can be exposed, and the ejector pin 301 can be easily inspected.

[0040] Reference Figure 1 and Figure 3 Furthermore, the outer needle nozzle mechanism also includes a roller 5, which is rotatably connected to the ejector pin 301. The ejector pin 301 contacts the limiting plate 2 via the roller 5. The roller 5 rolls on the limiting plate 2, which reduces wear on the ejector pin 301. In this embodiment, the number of rollers 5 corresponds to the number of ejector pin assemblies 3, with three being provided.

[0041] Reference Figure 1 and Figure 3Furthermore, the ejector assembly 3 also includes a syringe 302, and the syringe 302 includes a first syringe 3021, a second syringe 3022 and two covers 3023. The second syringe 3022 is inserted into the rotating disk 1, and the second syringe 3022 is connected to the rotating disk 1 by a pin or a thread. The first syringe 3021 is coaxially inserted into the second syringe 3022 and is rotatably connected to the second syringe 3022 by a bearing. The two covers 3023 are respectively located at both ends of the second syringe 3022 and are connected to the second syringe 3022 by bolts to cover the connection structure between the first syringe 3021 and the second syringe 3022. One end of the first needle cylinder 3021 extends out of the cover 3023. A support hole 302a is defined in the first needle cylinder 3021, aligned with its axis, for the insertion of the ejector pin 301 and the two separate winding pins 6. The separate winding pins 6 can extend from the end of the first needle cylinder 3021 extending out of the cover 3023 into the support hole 302a. During winding, the two separate winding pins 6 are inserted into the support hole 302a, and the ejector pin 301 is then inserted between the two separate winding pins 6.

[0042] With this arrangement, the entire ejector assembly 3 can be removed from the rotating disk 1 by removing the second needle cylinder 3022 from the rotating disk 1, thereby facilitating the installation and removal of the ejector assembly 3. Furthermore, since the first needle cylinder 3021 can rotate relative to the second needle cylinder 3022, during winding, the split winding needle 6 is inserted into the support hole 302a, and after the ejector 301 is inserted between the two split winding needles 6, as the split winding needle 6 rotates, the ejector 301 and the first needle cylinder 3021 rotate together with the split winding needle 6. Therefore, relative movement between the split winding needle 6 and the wall of the support hole 302a, as well as the ejector 301, is less likely to occur, thereby less likely to cause wear on the split winding needle 6.

[0043] Reference Figure 1 and Figure 3 Specifically, ejector pin 301 includes a body 3011, a handle 3013, and a needle head 3012. The body 3011 is inserted into the support hole 302a, and the handle 3013 and needle head 3012 are connected to opposite ends of the body 3011. The needle head 3012 is located within the support hole 302a and is inserted between the two split winding needles 6. The handle 3013 is located outside the support hole 302a. The elastic member 4 is connected to the handle 3013 so that the elastic force of the elastic member 4 can drive the ejector pin 301 to move.

[0044] Reference Figure 1 and Figure 3Specifically, the needle body 3011 includes a first needle body 3011a and a second needle body 3011b, and the first needle body 3011a and the second needle body 3011b are coaxially connected. In this embodiment, the first needle body 3011a and the second needle body 3011b can be rotatably connected through a bearing. The end of the first needle body 3011a facing away from the second needle body 3011b is integrally formed with the needle head 3012, and the end of the second needle body 3011b facing away from the first needle body 3011a is located outside the support hole 302a and passes through the cover body 3023, and the needle handle 3013 is fixedly sleeved on the second needle body 3011b. It can be understood that the needle head 3012 of the ejector pin 301 is inserted between the two split winding needles 6, and as the two split winding needles 6 rotate, the first needle body 3011a and the needle head 3012 rotate along with the split winding needle 6, while the second needle body 3011b and the needle handle 3013 do not rotate, so there is no relative movement between the second needle body 3011b and the cover body 3023, and the second needle body 3011b is not easily worn.

[0045] Reference Figure 1 and Figure 3 Specifically, the roller 5 is rotatably connected to one end of the second needle body 3011b facing away from the first needle body 3011a, and the elastic member 4 is located between the needle handle 3013 and the cover body 3023. Preferably, the elastic member 4 includes a spring, which is sleeved on the second needle body 3011b, and one end of the spring is fixed on the cover body 3023, and the other end of the spring abuts against the needle handle 3013.

[0046] Reference Figure 1 and Figure 3 Specifically, the needle head 3012 is arranged in a cone shape, and the needle head 3012 arranged in a cone shape is easier to be inserted between the two split winding needles 6 to separate the two split winding needles 6.

[0047] Reference Figure 1 and Figure 3 Furthermore, the ejector pin 301 further includes a support sleeve 3014, which is fixedly mounted on the first needle body 3011a. An annular gap is left between the circumferential inner side surface of the support sleeve 3014 and the circumferential side surface of the needle head 3012. When the ejector pin 301 is inserted between the two split winding needles 6, the split winding needles 6 are simultaneously inserted between the support sleeve 3014. Therefore, the support sleeve 3014 provides radial support for the outer surfaces of the split winding needles 6. Due to the radial support provided by the support sleeve 3014, the axial force exerted on the split winding needles 6 when the needle head 3012 is inserted between the split winding needles 6 is less likely to cause axial deformation of the split winding needles 6.

[0048] The embodiment of the present application provides an external needle nozzle mechanism, and when the rotating disk 1 of the external needle nozzle mechanism rotates with the winding head, the ejector pin 301 can switch the working position with the revolution of the rotating disk 1. One end of the ejector pin 301 is inserted between the two split winding needles 6 to separate the two split winding needles 6, and the other end of the ejector pin 301 abuts on the limiting disk 2. When the ejector pin 301 revolves, the ejector pin 301 slides on the limiting disk 2. When the ejector pin 301 slides to the needle pulling structure 201, the elastic force of the elastic member 4 can push the ejector pin 301 into the needle pulling structure 201, so as to drive the ejector pin 301 to leave the two split winding needles 6 and realize automatic needle pulling. When the ejector pin 301 further revolves to disengage from the needle pulling structure 201 and abuts against the side of the limiting disk 2, the elastic member 4 is compressed at this time, and the ejector pin 301 can be inserted between the two split winding needles 6 to realize automatic needle threading. Therefore, the outer needle nozzle mechanism can realize automatic needle insertion and removal of the ejector pin 301 without designing a power device to drive the ejector pin 301 to move, thereby simplifying the structure of the outer needle nozzle and reducing costs.

[0049] Another embodiment of the present application provides a winding device, comprising the outer needle nozzle mechanism as described above.

[0050] In the description of this application, it should be noted that the terms "upper" and "lower" 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 this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0051] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0052] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. An external needle nozzle mechanism, characterized in that: It includes: Turn the disk; A limiting disk is spaced apart from the rotating disk, and a needle pulling structure is provided on the side of the limiting disk facing the rotating disk; An ejector assembly, comprising an ejector pin, wherein the ejector pin is eccentrically disposed on the rotating disk; An elastic member, wherein both ends of the elastic member are connected to the rotating disk and the ejector pin respectively. In the needle threading state, the elastic member is used to push the ejector pin to make it abut against the limit disk. In the needle pulling state, the elastic member is used to push the ejector pin to make it extend to the needle pulling structure. The needle pulling structure includes a needle pulling groove, which is located on the rotation path of the ejector pin, and the side of the limiting plate facing the rotating plate transitions to the bottom arc of the needle pulling groove; The utility model further comprises a roller, which is rotatably connected to the ejector pin and rolls on the limiting disk.

2. The outer needle tip mechanism according to claim 1, characterized in that: The needle pulling structure includes a needle pulling notch, which is located on the rotation path of the ejector pin. The side wall of the needle pulling notch is arranged at an obtuse angle to the side surface of the limiting disk facing the rotating disk.

3. The outer needle tip mechanism according to claim 1, characterized in that: The ejector assembly further includes a syringe, which includes: The first needle cylinder is inserted into the rotating disk and is rotatably connected to the rotating disk. The first needle cylinder is provided with a support hole. The ejector pin is inserted into the first needle cylinder through the support hole.

4. The outer needle tip mechanism according to claim 3, characterized in that: The syringe further includes a second syringe, the second syringe is fixedly inserted into the rotating disk, and the first syringe is inserted into the second syringe and is rotatably connected to the second syringe.

5. The outer needle tip mechanism according to claim 4, characterized in that: The ejector pin includes a needle body and a needle handle, wherein the needle handle is connected to the tail end of the needle body. The elastic member includes a spring, one end of the spring is connected to the second needle cylinder, and the other end of the spring abuts against the needle handle.

6. The outer needle tip mechanism according to claim 1, characterized in that: The ejector pin comprises a needle head, and the needle head is arranged in a cone shape.

7. The outer needle tip mechanism according to claim 6, characterized in that: The ejector pin further includes a support sleeve, and a gap is left between the circumferential inner side surface of the support sleeve and the circumferential side surface of the needle head.

8. A winding device, characterized in that: Comprising the outer needle nozzle mechanism according to any one of claims 1 to 7.

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