CN114914554A

CN114914554A - Winding needle, winding device and winding machine

Info

Publication number: CN114914554A
Application number: CN202210600742.2A
Authority: CN
Inventors: 徐鑫
Original assignee: Sany Technology Equipment Co Ltd
Current assignee: Sany Technology Equipment Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-08-16

Abstract

The invention provides a winding needle, a winding device and a winding machine, which belong to the technical field of lithium battery manufacturing equipment and comprise: the needle cylinder is provided with an installation groove on the wall; the expansion part is movably arranged in the mounting groove and is provided with a retraction position and a support position; a diaphragm fixing structure; the needle cylinder can rotate relative to the inertia retaining structure, drives the expansion part to rotate and enables the expansion part to be converted between a retraction position and a support position under the action of the inertia retaining structure; and the limiting structure is arranged between the needle cylinder and the inertia retaining structure and is suitable for fixing the relative position of the needle cylinder and the inertia retaining structure. The winding needle provided by the invention is of an approximately complete cylindrical structure in the circumferential direction, the outer diameter of the winding needle can be changed, the integral rigidity of the winding needle is ensured, no additional support is required to be arranged when the winding needle is used, and the integral structure of a winding device is simplified.

Description

Winding needle, winding device and winding machine

Technical Field

The invention relates to the technical field of lithium battery manufacturing equipment, in particular to a winding needle, a winding device and a winding machine.

Background

The winding-type battery core is adopted by lithium battery manufacturing enterprises due to the advantages of stable battery performance, high manufacturing efficiency and the like in the battery core, and the proportion of the battery core in the market is high, so that the corresponding battery winding machine is high in demand.

In the manufacturing process of the lithium battery cell, a winding device is generally required to wind the separator. In the prior art, a winding needle of a winding device generally comprises two half inner needles for clamping the end of a diaphragm and two half outer needles for supporting the diaphragm to form a reference internal dimension when winding a cell; when the needle needs to be withdrawn, the diameters of the two half outer needles are reduced, and the two half inner needles loosen the diaphragm, so that the battery core can be taken down from the winding needle. However, since the winding needle is of a half-split structure, the rigidity of the winding needle is poor, and therefore an additional support structure needs to be arranged to support the winding needle, so that the overall structure of the device is complex.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor rigidity of the winding needle in the prior art, so as to provide a winding needle, a winding device and a winding machine.

In order to solve the above problems, the present invention provides a winding needle comprising: the needle cylinder is provided with an installation groove on the cylinder wall; the expansion part is movably arranged in the mounting groove and is provided with a retraction position located inside the mounting groove and a support position at least partially located outside the mounting groove; the septum fixing structure is suitable for being matched with the needle cylinder to fix or release a septum; the inertia retaining structure is inserted into the needle cylinder and movably connected with the expansion part, the needle cylinder can rotate relative to the inertia retaining structure and drive the expansion part to rotate, and the expansion part is switched between the retraction position and the support position under the action of the inertia retaining structure; and the limiting structure is arranged between the needle cylinder and the inertia retaining structure and is suitable for fixing the relative position of the needle cylinder and the inertia retaining structure.

Optionally, the inertial retention structure comprises: the rotating rod is inserted into the needle cylinder, and the needle cylinder can rotate around the rotating rod; the rotating plate is connected with the rotating rod, a sliding groove is formed in the rotating plate, the expansion part is slidably connected with the sliding groove, the inner wall of the sliding groove is a pushing surface, and when the needle cylinder rotates around the rotating rod, the pushing surface can push the expansion part to move in the mounting groove; an inertia enhancing portion provided on the rotating lever.

Optionally, the tight portion that expands is including the tight piece and the spliced pole that expand, expand tight piece with the inner wall sliding connection of mounting groove, the spliced pole set up in the inboard of the tight piece that expands, be provided with the plug on the spliced pole, the plug insert locate in the spout and with push away face sliding connection.

Optionally, the sliding groove is a waist-shaped groove or a waist-shaped hole.

Optionally, the expansion portion is provided with two, the mounting groove is also provided with two, and the expansion portion is provided at two opposite ends of the rotating plate and respectively corresponds to the two mounting grooves.

Optionally, a placing groove is further formed in the wall of the needle cylinder, and the placing groove can allow the end of the septum to penetrate through; the diaphragm fixing structure comprises a pressing part, one end of the pressing part is connected with the inertia retaining structure, the other end of the pressing part is arranged close to the inner wall of the needle cylinder, and a diaphragm is suitable to be fixed between the other end of the pressing part and the inner wall of the needle cylinder.

Optionally, press the splenium including mounting panel, connecting plate and press the strip, the mounting panel with inertia keeps structural connection, and the mounting panel interval is provided with a plurality of, the connecting plate is connected a plurality of simultaneously the mounting panel, press the layering set up in the connecting plate is kept away from one side of mounting panel.

Optionally, the limiting structure includes at least one ball plunger, a fixed end of the ball plunger is connected with an inner wall of the needle cylinder, the inertia retaining structure is provided with at least two limiting grooves, when the expansion portion is located at the retraction position, at least one ball of the ball plunger is suitable for being inserted into one of the limiting grooves, and when the expansion portion is located at the support position, at least one ball of the ball plunger is suitable for being inserted into the other limiting groove.

Optionally, the ball plunger is provided with two, two the ball plunger follows the axial of cylinder sets up side by side, spacing recess is provided with two, two spacing recess follows the axial and the circumference of inertia retaining structure all misplace the setting, works as the tight portion that expands is located withdrawal position, one the ball of ball plunger is suitable for inserting and locates one of them in the spacing recess, works as the tight portion that expands is located the support position, another the ball of ball plunger is suitable for inserting and locates another in the spacing recess.

Optionally, a cutter groove is formed on the outer wall of the needle cylinder.

Optionally, an outer side of the expansion portion is recessed inward to form a receiving groove.

The invention also provides a winding device which comprises the winding needle.

Optionally, the winding device further comprises: the film pressing mechanism is suitable for pressing a diaphragm on the outer wall of the needle cylinder; the membrane pushing mechanism is suitable for pushing the end part of the membrane into the needle cylinder from a placing groove formed in the needle cylinder; and the film cutting mechanism is suitable for cutting off the diaphragm at one side of the film pushing mechanism, which is far away from the film pressing mechanism.

Optionally, the film pressing mechanism comprises a one-way wheel and a first driving part, and the first driving part is suitable for driving the one-way wheel to be close to or far away from the needle cylinder; and/or the membrane pushing mechanism comprises a push plate and a second driving part, and the second driving part is suitable for driving the push plate to be inserted into or removed from the placing groove; and/or the film cutting mechanism comprises a cutting knife and a third driving part, and the third driving part is suitable for driving the cutting knife to be close to or far away from the needle cylinder.

Optionally, the winding device further includes a fourth driving portion, the fourth driving portion is in transmission connection with the film pressing mechanism, the film pushing mechanism and the film cutting mechanism, and the fourth driving portion is adapted to drive the film pressing mechanism, the film pushing mechanism and the film cutting mechanism to be close to or far away from the winding needle simultaneously.

The invention also provides a winding machine comprising the winding device.

The invention has the following advantages:

1. the invention provides a winding needle, which comprises a needle cylinder and an expansion part, wherein when the needle cylinder is accelerated instantly, the position of an inertia retaining structure is fixed by using the inertia force of the inertia retaining structure, so that the needle cylinder rotates by a certain angle relative to the inertia retaining structure, in the rotating process of the needle cylinder, the expansion part moves under the interaction with the inertia retaining structure, in addition, the relative position of the needle cylinder and the inertia retaining structure is fixed by using a limiting structure, so that when the needle cylinder rotates stably for winding, the inertia retaining structure can be driven to rotate synchronously, and the position of the expansion part is ensured to be unchanged. Therefore, the winding needle is of an approximately complete cylindrical structure in the circumferential direction, the overall rigidity of the winding needle is guaranteed while the outer diameter of the winding needle can be changed, extra support does not need to be arranged when the winding needle is used, and the overall structure of the winding device is simplified.

2. According to the winding needle provided by the invention, the inertia enhancement part is arranged on the rotating rod to improve the inertia of the inertia retaining structure, so that when the needle cylinder rotates at an instant acceleration, the inertia retaining structure is ensured not to rotate along with the needle cylinder under the action of the inertia enhancement part, and when the needle cylinder rotates, the inner wall of the sliding chute is used as a pushing surface to push the expansion part to move in the mounting groove, so that the expansion part can move only by utilizing the original drive of the needle cylinder, the drive mode is simple and convenient, and the integral structure is simplified.

3. According to the winding needle provided by the invention, the sliding groove is arranged to be the waist-shaped groove or the waist-shaped hole, the position of the expansion part can be switched in the process that the plug slides along the sliding groove, and the sliding groove can guide and limit the plug, so that the movement stability of the expansion part is ensured.

4. According to the winding needle provided by the invention, the two expansion parts are arranged at two opposite ends of the rotating plate respectively, so that the two expansion parts are respectively positioned at two opposite sides of the needle cylinder, and the expansion parts are supported at the symmetrical positions of the battery cell, so that the winding shape of the battery cell is more regular, and the winding process is more stable.

5. According to the winding needle provided by the invention, the pressing part is connected with the inertia retaining structure, when the needle cylinder and the inertia retaining structure rotate relatively, the expansion part moves to the supporting position, the pressing part also rotates relatively with the needle cylinder, the diaphragm is fixed between the pressing part and the inner wall of the needle cylinder, winding can be carried out, after winding is finished, the needle cylinder rotates relatively with the inertia retaining structure in the opposite direction, the expansion part moves to the retraction position, and the pressing part cancels pressing of the diaphragm, so that a battery cell is conveniently taken down from the winding needle. Therefore, the pressing part is arranged on the inertia retaining structure, so that synchronous operation of the expansion part and the pressing part can be realized, the expansion part and the pressing part can be matched conveniently, and the structure and the working steps of the winding needle are simplified.

6. According to the winding needle provided by the invention, the mounting plates are arranged at intervals, so that the stability of the pressing process is ensured while the structure is simple and the weight is light.

7. According to the winding needle provided by the invention, the fixing of the relative position of the needle cylinder and the inertia retaining structure is realized by utilizing the matching of the ball plunger and the limiting groove, and the separation of the ball plunger and the limiting groove can be realized under the action of the rotating force of the needle cylinder when the needle cylinder rotates in an instant acceleration manner, so that the relative position of the needle cylinder and the inertia retaining structure can be conveniently changed.

8. According to the winding needle provided by the invention, the cutter groove is formed in the outer wall of the needle cylinder, so that the cutter is prevented from interfering with the needle cylinder when a diaphragm is cut off, and the integrity of the needle cylinder and the cutter and the safety of the cutting process are ensured.

9. According to the winding needle provided by the invention, when the battery cell is taken down from the winding needle after winding is finished, the battery cell clamping rod can be inserted into the accommodating groove formed in the expansion part, so that the battery cell is taken down conveniently.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 shows a cross-sectional view of a winding needle provided in embodiment 1 of the present invention in an axial direction;

FIG. 2 shows a cross-sectional view of a winding needle provided in embodiment 1 of the present invention in a radial direction;

fig. 3 is a schematic structural view showing an inertia holding structure and a pressing part of a winding needle provided in embodiment 1 of the present invention;

FIG. 4 is a view taken along line A of FIG. 3;

fig. 5 is a schematic structural view showing a winding apparatus provided in embodiment 2 of the present invention in a first state;

fig. 6 is a schematic structural view showing a winding apparatus provided in embodiment 2 of the present invention in a second state;

FIG. 7 is a schematic view showing the structure of a winding apparatus provided in embodiment 2 of the present invention in a third state;

fig. 8 is a schematic structural view showing a winding apparatus provided in embodiment 2 of the present invention in a fourth state;

fig. 9 is a schematic structural view showing a winding device provided in embodiment 2 of the present invention in a fifth state.

Description of reference numerals:

10. a needle cylinder; 11. mounting grooves; 12. a placement groove; 13. a cutter slot; 14. a barrel; 15. a base body; 16. a cover body; 20. an expansion part; 21. expanding and tightening blocks; 22. connecting columns; 221. a plug; 23. accommodating grooves; 30. an inertia retention structure; 31. rotating the rod; 32. a rotating plate; 321. a chute; 33. an inertia reinforcing section; 34. a limiting groove; 40. a limiting structure; 50. a pressing part; 51. mounting a plate; 52. a connecting plate; 53. pressing the pressing strip; 60. a film pressing mechanism; 61. a one-way wheel; 62. a first driving section; 70. a film pushing mechanism; 71. pushing the plate; 72. a second driving section; 80. a film cutting mechanism; 81. a cutter; 82. a third driving section; 90. a diaphragm.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

One embodiment of the winding needle shown in fig. 1 to 4 includes: syringe 10, expansion 20, septum securement structure, inertia retention structure 30, and stop structure 40. The cylinder 10 has a mounting groove 11 formed on a wall thereof, and the expansion portion 20 is movably disposed in the mounting groove 11, and the expansion portion 20 has a retracted position located inside the mounting groove 11 and a support position at least partially located outside the mounting groove 11. The diaphragm fixing structure is provided corresponding to the cylinder 10 to fix the diaphragm 90 in cooperation with each other at the time of winding, and to release the diaphragm 90 after the winding is completed. The inertia holding structure 30 is inserted into the cylinder 10 and is movably connected to the expansion part 20. The needle cylinder 10 can rotate relative to the inertia holding structure 30 and bring the expansion part 20 into rotation, and the expansion part 20 is switched between the retracted position and the support position by the inertia holding structure 30. The position limiting structure 40 is disposed between the needle cylinder 10 and the inertia retaining structure 30, and the position limiting structure 40 can fix the relative position of the needle cylinder 10 and the inertia retaining structure 30.

It should be noted that the inertia holding structure 30 is movably connected to the expansion portion 20, including but not limited to sliding connection, hinge connection, etc., and the inertia holding structure 30 may be directly connected to the expansion portion 20 or indirectly connected thereto through another structure.

When the needle cylinder 10 is accelerated instantaneously, the inertia force of the inertia retaining structure 30 is utilized to make the inertia retaining structure 30 not move, so that the needle cylinder 10 rotates a certain angle relative to the inertia retaining structure 30, in the process of rotating the needle cylinder 10, the expansion part 20 moves under the interaction with the inertia retaining structure 30, and the limit structure 40 is utilized to fix the relative position of the needle cylinder 10 and the inertia retaining structure 30, so that when the needle cylinder 10 rotates stably for winding, the inertia retaining structure 30 can be driven to rotate synchronously, and the position of the expansion part 20 is ensured not to change. Therefore, the winding needle is of an approximately complete cylindrical structure in the circumferential direction, the overall rigidity of the winding needle is guaranteed while the outer diameter of the winding needle can be changed, extra support does not need to be arranged when the winding needle is used, and the overall structure of the winding device is simplified.

It should be noted that, in order to perform the winding process using the winding needle, a rotary driving structure is connected to the needle cylinder 10 itself to drive the needle cylinder 10 to rotate and wind the battery cell. In the present embodiment, in order to generate the relative rotation between the cylinder 10 and the inertia retaining mechanism 30, the cylinder 10 is instantaneously accelerated by the rotation driving mechanism of the cylinder 10, and the inertia retaining mechanism 30 can be kept stationary by its own inertia force, that is, the cylinder 10 can rotate around the inertia retaining mechanism 30 by a certain angle. Therefore, the relative rotation between the cylinder 10 and the inertia retaining structure 30 can be achieved without providing an additional driving force, simplifying the overall structure.

It should be further noted that the needle cylinder 10 needs to be instantaneously accelerated only when the relative position of the needle cylinder 10 and the inertia retaining structure 30 needs to be changed, and the needle cylinder 10 is driven to rotate smoothly during the winding process, and the relative position of the needle cylinder 10 and the inertia retaining structure 30 can be kept unchanged under the action of the limiting structure 40.

As shown in fig. 1 and 2, the inertia retaining structure 30 includes a rotating lever 31, a rotating plate 32, and an inertia increasing portion 33, and the inertia increasing portion 33 is provided on the rotating lever 31. The rotation lever 31 is inserted into the cylinder 10, and the cylinder 10 can rotate around the rotation lever 31. The rotating plate 32 is connected to the rotating rod 31, a sliding groove 321 is formed in the rotating plate 32, the expansion portion 20 is slidably connected to the sliding groove 321, and an inner wall of the sliding groove 321 is a pushing surface. When the cylinder 10 rotates around the rotation lever 31, the pushing surface can push the expansion part 20 to move in the mounting groove 11.

The inertia reinforcing part 33 is arranged on the rotating rod 31 to improve the inertia of the inertia retaining structure 30, so that when the needle cylinder 10 rotates in an instant acceleration manner, the inertia retaining structure 30 is ensured not to rotate along with the needle cylinder 10 under the action of the inertia reinforcing part 33, and when the needle cylinder 10 rotates, the inner wall of the sliding groove 321 is used as a pushing surface to push the expansion part 20 to move in the mounting groove 11, so that the expansion part 20 can move only by utilizing the original drive of the needle cylinder 10, the driving mode is simple and convenient, and the whole structure is simplified.

It is noted that the inertia enhancing portion 33 may be a weight increasing portion having a certain weight to enhance inertia by increasing the overall weight of the inertia holding structure 30.

As shown in fig. 1, the syringe 10 includes a barrel 14, a seat 15 and a cover 16, the seat 15 and the cover 16 are respectively disposed at two ends of the barrel 14, and a rotating rod 31 is inserted into the centers of the seat 15 and the cover 16.

As shown in fig. 1 and 2, the expansion part 20 includes an expansion block 21 and a connection column 22. The expansion block 21 is slidably connected with the inner wall of the mounting groove 11, the connecting column 22 is arranged on the inner side of the expansion block 21, a plug 221 is arranged on the connecting column 22, and the plug 221 is inserted into the sliding groove 321 and slidably connected with the pushing surface.

In this embodiment, as shown in fig. 2, the sliding groove 321 is a kidney-shaped groove or a kidney-shaped hole, the plug 221 is vertically connected to the connecting column 22, and the outer wall of the plug 221 is matched with the inner wall of the sliding groove 321.

The sliding groove 321 is set to be a waist-shaped groove or a waist-shaped hole, the position of the expansion part 20 can be changed in the process that the plug 221 slides along the sliding groove 321, and the sliding groove 321 can guide and limit the plug 221 to ensure the moving stability of the expansion part 20.

It should be noted that, when the syringe 10 rotates around the rotating rod 31, the expansion part 20 is driven to rotate together, and when the expansion part 20 rotates, the plug 221 interacts with the pushing surface of the sliding slot 321, so that the plug 221 slides in the sliding slot 321, and the expansion part 20 moves in the mounting slot 11.

Of course, as an alternative embodiment, the connection between the expansion part 20 and the inertia maintaining structure 30 can be realized by a link mechanism, and both ends of the link mechanism are hinged with the expansion part 20 and the inertia maintaining structure 30, respectively, so that the expansion part 20 is moved by the link mechanism when the syringe 10 rotates.

In the present embodiment, as shown in fig. 1 and 2, two expansion portions 20 are provided at opposite ends of the rotating plate 32, and correspondingly, two mounting grooves 11 are provided, and two expansion portions 20 are provided corresponding to the two mounting grooves 11, respectively.

Set up to two and locate the relative both ends of rotor plate 32 with the tight portion 20 that expands to make two tight portions 20 that expand be located the relative both sides of cylinder 10 respectively, make tight portion 20 that expands support in the symmetric position of electric core, so that electric core coiling shape is more regular, and the coiling process is more stable.

In the present embodiment, as shown in fig. 2, the outer side of the expansion portion 20 is curved. Referring to fig. 8, when the expansion portion 20 is located at the supporting position, the outer side of the expansion portion 20 cooperates with the outer wall of the syringe 10 to form an approximately complete circular structure, so as to stably and uniformly wind the battery cell; referring to fig. 2, when the expansion portion 20 is located at the retraction position, the overall external dimension of the winding needle is reduced, so that a gap is formed between the inside of the battery cell and the outside of the winding needle, so as to separate the battery cell from the winding needle.

Of course, as an alternative embodiment, the supporting position of the expansion part 20 may be more outward with respect to the expansion part 20 of fig. 8.

As shown in fig. 1, two rotating plates 32 are provided on one rotating rod 31 at intervals, correspondingly, two connecting columns 22 are provided on one expansion block 21 at intervals, and one plug 221 is provided on each connecting column 22.

As shown in fig. 2 to 4, a placement groove 12 is opened on the wall of the cylinder 10, and the placement groove 12 can allow the end of the septum 90 to penetrate. The septum fixing structure includes a pressing portion 50, one end of the pressing portion 50 is connected to the inertia holding structure 30, the other end of the pressing portion 50 is disposed near the inner wall of the needle cylinder 10, and a septum 90 can be fixed between the other end of the pressing portion 50 and the inner wall of the needle cylinder 10.

The pressing part 50 is connected with the inertia retaining structure 30, when the needle cylinder 10 and the inertia retaining structure 30 rotate relatively, the expansion part 20 moves to the supporting position, the pressing part 50 also rotates relatively with the needle cylinder 10, the diaphragm 90 is fixed between the pressing part 50 and the inner wall of the needle cylinder 10, winding can be performed, after winding is completed, the needle cylinder 10 rotates relatively with the inertia retaining structure 30 in the opposite direction, the expansion part 20 moves to the retraction position, and the pressing part 50 cancels pressing of the diaphragm 90, so that the battery core can be taken down from the winding needle. Therefore, by arranging the pressing portion 50 on the inertia holding structure 30, the synchronous operation of the expanding portion 20 and the pressing portion 50 can be realized, so that the expanding portion 20 and the pressing portion 50 can be matched, and the structure and the working steps of the winding needle are simplified.

Specifically, in the present embodiment, as shown in fig. 4, the pressing portion 50 includes a mounting plate 51, a connecting plate 52, and a pressing bar 53. The mounting plates 51 are connected to the inertia holding structure 30, and the mounting plates 51 are provided in plural numbers at intervals, the connecting plate 52 is connected to the plural mounting plates 51 at the same time, and the pressing bar 53 is provided on the side of the connecting plate 52 away from the mounting plates 51.

The mounting plate 51 is arranged at intervals, so that the stability of the pressing process is ensured while the structure is simple and the weight is light.

In the present embodiment, as shown in fig. 2 and 4, the inner end of the mounting plate 51 is connected to the rotating lever 31, and the pressing bar 53 is provided on one side surface of the connecting plate 52. Referring to fig. 7 and 8, the end of the diaphragm 90 penetrates into the syringe 10 through the placement groove 12, and the end of the diaphragm 90 is fixed between the surface of the pressing strip 53 facing the inner wall of the syringe 10 and the inner wall of the syringe 10.

Of course, the pressing portion 50 may extend into the storage tank 12, and the diaphragm 90 may be pressed against the wall of the storage tank 12 by the pressing portion 50.

It should be noted that in other alternative embodiments, the septum securing structure may be other structures capable of securing and releasing the septum 90, for example, a clamping structure disposed inside the syringe 10 that clamps the end of the septum 90 during winding and releases the septum 90 after winding is completed.

As shown in fig. 1, the limiting structure 40 includes two ball plungers, a fixed end of the ball plunger is connected with an inner wall of the syringe 10, and the two ball plungers are arranged side by side along an axial direction of the syringe 10. Two limiting grooves 34 are formed in the rotating rod 31, and the two limiting grooves 34 are arranged along the axial direction and the circumferential direction of the rotating rod 31 in a staggered mode. When the expansion part 20 is located at the retraction position, the ball head of a ball head plunger is inserted into one of the limiting grooves 34; when the expansion part 20 is at the supporting position, the ball of another ball plunger is inserted into another limiting groove 34.

It is worth to be noted that the ball of the ball plunger can extend or retract under the action of the spring, please refer to fig. 1, the ball of the ball plunger located on the left side extends and is inserted into the corresponding limiting groove 34, and the ball of the ball plunger located on the right side retracts under the action of the outer wall of the rotating rod 31 and is circumferentially arranged in a staggered manner with the corresponding limiting groove 34.

Of course, in other alternative embodiments, there may be one ball plunger, and there are two limiting grooves 34, and the two limiting grooves 34 are arranged at intervals along the circumferential direction of the rotating rod 31. When the expansion part 20 is located at the retraction position, the ball plunger is inserted into one of the limiting grooves 34; when the expansion portion 20 is located at the supporting position, the needle cylinder 10 drives the ball plunger to rotate a certain angle along the circumferential direction, so that the ball plunger is inserted into the other limiting groove 34.

It should be noted that, the number of the ball plunger and the limiting groove 34 may also be set to be more, and only the ball plunger and the limiting groove 34 need to be correspondingly matched with two positions of the expansion portion 20.

The fixing of the relative position of the needle cylinder 10 and the inertia retaining structure 30 is realized by the cooperation of the ball plunger and the limiting groove 34, and when the needle cylinder 10 rotates at an instant with higher speed, the separation of the ball plunger and the limiting groove 34 can be realized under the action of the rotating force of the needle cylinder 10, so that the relative position of the needle cylinder 10 and the inertia retaining structure 30 can be conveniently changed.

As shown in fig. 2, the cutter groove 13 is formed on the outer wall of the needle cylinder 10, so that the cutter 81 is prevented from interfering with the needle cylinder 10 when the diaphragm 90 is cut off, and the integrity of the needle cylinder 10 and the cutter 81 and the safety of the cutting process are ensured.

As shown in fig. 2, the outer side of the expansion block 21 is recessed inward to form a receiving groove 23. When the winding is completed and the battery core is taken down from the winding needle, the battery core clamping rod can be inserted into the containing groove 23, so that the battery core can be taken down conveniently.

Example 2

One embodiment of the winding device shown in fig. 5 to 9 includes the winding pin of example 1.

As shown in fig. 5 to 9, the winding apparatus further includes a film pressing mechanism 60, a film pushing mechanism 70, and a film cutting mechanism 80. The film pressing mechanism 60 is used for pressing the diaphragm 90 on the outer wall of the needle cylinder 10, the film pushing mechanism 70 can push the end part of the diaphragm 90 into the needle cylinder 10 from the placing groove 12, and the film cutting mechanism 80 is used for cutting off the diaphragm 90 on the side, away from the film pressing mechanism 60, of the film pushing mechanism 70.

It should be noted that, after the film pressing mechanism 60 presses the diaphragm 90 against the outer wall of the cylinder 10, the film cutting mechanism 80 cuts the diaphragm 90 to form the end portion of the diaphragm 90, and the film pushing mechanism 70 pushes the end portion of the diaphragm 90 into the placement groove 12.

In the present embodiment, as shown in fig. 5 to 9, the squeeze film mechanism 60 includes a one-way wheel 61 and a first driving part 62, and the first driving part 62 can drive the one-way wheel 61 to approach or separate from the cylinder 10; the film pushing mechanism 70 comprises a pushing plate 71 and a second driving part 72, wherein the second driving part 72 can drive the pushing plate 71 to be inserted into or removed from the placing groove 12; the film cutting mechanism 80 includes a cutting blade 81 and a third driving part 82, and the third driving part 82 can drive the cutting blade 81 to approach or separate from the cylinder 10.

It should be noted that, in the present embodiment, the reason why the diaphragm 90 is pressed against the outer wall of the needle cylinder 10 by the one-way wheel 61 is that after the film pushing mechanism 70 pushes the end portion of the diaphragm 90 into the needle cylinder 10 and exits the needle cylinder 10, the one-way wheel 61 needs to continuously press the diaphragm 90, and when the needle cylinder 10 rotates by a certain angle relative to the pressing portion 50, so that the pressing portion 50 presses the end portion of the diaphragm 90 against the inner wall of the needle cylinder 10, the one-way wheel 61 can cancel the pressing of the diaphragm 90. Therefore, relative rotation occurs between the outer wall of the syringe 10 and the film pressing mechanism 60, and if the pressing plate presses the diaphragm 90, the diaphragm 90 is scratched.

It should be further noted that, referring to fig. 7 and 8, the needle cylinder 10 rotates clockwise, and correspondingly, the rotation direction of the one-way wheel 61 is counterclockwise. If the one-way wheel 61 is rotatable in the clockwise direction, the one-way wheel 61 cannot stably press the diaphragm 90 by the tension of the diaphragm 90.

In this embodiment, the winding device further includes a fourth driving portion, and the fourth driving portion is in transmission connection with the film pressing mechanism 60, the film pushing mechanism 70 and the film cutting mechanism 80. The fourth driving part can drive the film pressing mechanism 60, the film pushing mechanism 70 and the film cutting mechanism 80 to simultaneously get close to or away from the winding needle. Specifically, the fourth driving part is connected to the first driving part 62, the second driving part 72, and the third driving part 82.

In the present embodiment, the first driving portion 62, the second driving portion 72, the third driving portion 82, and the fourth driving portion may be air cylinders, electric cylinders, or the like.

Example 3

This example provides a specific embodiment of the winding machine, including the winding device of example 2, making the winding machine structurally rigid and simple.

In the case of using the winding device of example 2, first, as shown in fig. 5, the fourth driving unit drives the film pressing mechanism 60, the film pushing mechanism 70, and the film cutting mechanism 80 to approach the winding needle, the first driving unit 62 drives the one-way wheel 61 to press the diaphragm 90 against the outer wall of the cylinder 10, and the third driving unit 82 drives the cutter 81 to cut the diaphragm 90; then, as shown in fig. 6 and 7, the second driving part 72 drives the push plate 71 to push the end of the septum 90 into the placement groove 12, and further, the end of the septum 90 is inserted into the syringe 10; thereafter, as shown in fig. 8, the one-way wheel 61 continuously presses the diaphragm 90, the second driving part 72 drives the push plate 71 to exit from the placing groove 12, the needle cylinder 10 is instantaneously accelerated and rotated, the pressing part 50 presses the end of the diaphragm 90 against the inner wall of the needle cylinder 10, and the expansion part 20 is moved from the retracted position to the supporting position by the sliding groove 321; finally, as shown in fig. 9, the first driving portion 62 drives the one-way wheel 61 to be away from the winding needle, the second driving portion 72 drives the pushing plate 71 to be away from the winding needle, the third driving portion 82 drives the cutter 81 to be away from the winding needle, the fourth driving portion simultaneously drives the film pressing mechanism 60, the film pushing mechanism 70 and the film cutting mechanism 80 to be away from the winding needle, and the winding needle can rotate to wind. After winding, the needle cylinder 10 is accelerated instantaneously and rotated in the opposite direction, under the action of the pushing surface of the sliding groove 321, the expansion portion 20 is moved from the supporting position to the retracting position, and the pressing portion 50 cancels pressing of the diaphragm 90, at this time, the cell clamping bar can be inserted into the accommodating groove 23, so that the cell can be taken off from the winding needle by using the cell clamping bar.

According to the above description, the present patent application has the following advantages:

1. the winding needle is of an approximately complete cylindrical structure in the circumferential direction, so that the integral rigidity of the winding needle is ensured, the winding needle can be used without arranging additional support, and the integral structure of the winding device is simplified;

2. the needle cylinder is subjected to instantaneous accelerated rotation by using the rotary driving structure of the needle cylinder, and the inertia retaining structure can be kept still by using the self inertia force, so that the needle cylinder can rotate for a certain angle around the inertia retaining structure, and therefore, the relative rotation between the needle cylinder and the inertia retaining structure can be realized without arranging additional driving, and the overall structure is simplified;

3. and the winding needle is integrally arranged, so that the processing precision is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.

Claims

1. A needle coil, comprising:

the syringe (10), the wall of the syringe (10) is provided with a mounting groove (11);

-a tightening part (20) movably arranged in the mounting groove (11), the tightening part (20) having a retracted position inside the mounting groove (11) and a support position at least partly outside the mounting groove (11);

a septum fixing structure which is suitable for being matched with the needle cylinder (10) to fix or release a septum (90);

the inertia retaining structure (30) is inserted into the needle cylinder (10) and is movably connected with the expansion part (20), the needle cylinder (10) can rotate relative to the inertia retaining structure (30) and drives the expansion part (20) to rotate, and under the action of the inertia retaining structure (30), the expansion part (20) is switched between the retraction position and the support position;

the limiting structure (40) is arranged between the needle cylinder (10) and the inertia retaining structure (30), and the limiting structure (40) is suitable for fixing the relative position of the needle cylinder (10) and the inertia retaining structure (30).

2. The needle of claim 1, wherein the inertial retention structure (30) comprises:

the rotating rod (31) is inserted into the needle cylinder (10), and the needle cylinder (10) can rotate around the rotating rod (31);

the rotating plate (32) is connected with the rotating rod (31), a sliding groove (321) is formed in the rotating plate (32), the expansion part (20) is connected with the sliding groove (321) in a sliding mode, the inner wall of the sliding groove (321) is a pushing surface, and when the needle cylinder (10) rotates around the rotating rod (31), the pushing surface can push the expansion part (20) to move in the installation groove (11);

an inertia increasing portion (33) provided on the rotating lever (31).

3. The winding needle according to claim 2, characterized in that the expansion portion (20) comprises an expansion block (21) and a connecting column (22), the expansion block (21) is slidably connected with the inner wall of the mounting groove (11), the connecting column (22) is arranged at the inner side of the expansion block (21), a plug (221) is arranged on the connecting column (22), and the plug (221) is inserted into the sliding groove (321) and slidably connected with the pushing surface.

4. The needle of claim 2 wherein the runner (321) is a kidney slot or a kidney hole.

5. Needle according to any one of claims 2 to 4, wherein there are two expansion portions (20) and two mounting slots (11), and the two expansion portions (20) are respectively disposed at opposite ends of the rotating plate (32) and are respectively disposed corresponding to the two mounting slots (11).

6. The needle according to any one of claims 1 to 4, wherein the wall of the needle cylinder (10) is further provided with a placing groove (12), and the placing groove (12) can allow the end of the septum (90) to penetrate; the diaphragm fixing structure comprises a pressing part (50), one end of the pressing part (50) is connected with the inertia retaining structure (30), the other end of the pressing part (50) is arranged close to the inner wall of the needle cylinder (10), and a diaphragm (90) is suitable to be fixed between the other end of the pressing part (50) and the inner wall of the needle cylinder (10).

7. The needle of claim 6, wherein the pressing portion (50) comprises a mounting plate (51), a connecting plate (52) and a pressing strip (53), the mounting plate (51) is connected with the inertia holding structure (30), the mounting plate (51) is provided with a plurality of spaces, the connecting plate (52) is connected with a plurality of mounting plates (51), and the pressing strip (53) is arranged on one side of the connecting plate (52) far away from the mounting plates (51).

8. The needle winding according to any one of claims 1 to 4, wherein the limiting structure (40) comprises at least one ball plunger, a fixed end of the ball plunger is connected with an inner wall of the needle cylinder (10), the inertia retaining structure (30) is provided with at least two limiting grooves (34), when the expansion part (20) is located at the retraction position, the ball of the at least one ball plunger is suitable for being inserted into one of the limiting grooves (34), and when the expansion part (20) is located at the support position, the ball of the at least one ball plunger is suitable for being inserted into the other limiting groove (34).

9. The needle winding according to claim 8, wherein there are two ball plungers, two of said ball plungers are arranged side by side along the axial direction of said needle cylinder (10), two of said retaining grooves (34) are arranged in a staggered manner along both the axial direction and the circumferential direction of said inertia holding structure (30), the ball of one of said ball plungers is adapted to be inserted into one of said retaining grooves (34) when said expansion portion (20) is in the retracted position, and the ball of the other of said ball plungers is adapted to be inserted into the other of said retaining grooves (34) when said expansion portion (20) is in the support position.

10. Needle according to any one of claims 1 to 4, characterized in that the needle cylinder (10) has a cutting slot (13) in its outer wall.

11. Needle according to any one of claims 1 to 4, wherein the outer side of said expansion portion (20) is recessed inwards to form a receiving groove (23).

12. A winding device comprising a winding needle according to any one of claims 1 to 11.

13. The winding device according to claim 12, characterized in that it further comprises:

a film pressing mechanism (60), wherein the film pressing mechanism (60) is suitable for pressing a diaphragm (90) on the outer wall of the needle cylinder (10);

the membrane pushing mechanism (70), the membrane pushing mechanism (70) is suitable for pushing the end part of the membrane (90) into the needle cylinder (10) from a placing groove (12) formed on the needle cylinder (10);

the film cutting mechanism (80), the film cutting mechanism (80) is suitable for cutting off the diaphragm (90) on the side, away from the film pressing mechanism (60), of the film pushing mechanism (70).

14. Winding device according to claim 13, wherein said lamination mechanism (60) comprises a one-way wheel (61) and a first drive (62), said first drive (62) being adapted to drive said one-way wheel (61) closer to or farther from said needle cylinder (10); and/or the presence of a gas in the gas,

the film pushing mechanism (70) comprises a push plate (71) and a second driving part (72), and the second driving part (72) is suitable for driving the push plate (71) to be inserted into or removed from the placing groove (12); and/or the presence of a gas in the gas,

the film cutting mechanism (80) comprises a cutting knife (81) and a third driving part (82), and the third driving part (82) is suitable for driving the cutting knife (81) to be close to or far away from the needle cylinder (10).

15. The winding device according to claim 14, further comprising a fourth driving portion in transmission connection with each of the film pressing mechanism (60), the film pushing mechanism (70) and the film cutting mechanism (80), the fourth driving portion being adapted to drive the film pressing mechanism (60), the film pushing mechanism (70) and the film cutting mechanism (80) simultaneously to approach or to move away from the winding needle.

16. A winding machine, characterized in that it comprises a winding device according to any one of claims 12 to 15.