A coiling needle and a winding device

Abstract

The present invention provides a winding needle and a winding device, which relate to the technical field of battery cell processing; wherein, the winding needle comprises a winding needle body, a push rod, an outer needle body and a lifting piece, wherein the push rod is arranged on the winding needle body and can be axially displaced relative to the winding needle body, and the lifting piece is connected to the outer needle body, and at the same time, it can contact with the guide surface of the push rod, and when the push rod moves axially relative to the winding needle body, the lifting piece slides on the guide surface, so that the outer needle body is radially displaced relative to the winding needle body; the mechanical structure is cleverly utilized to convert the radial adjustment problem of the outer needle body into the axial adjustment problem of the push rod, so that the winding needle only needs to be provided with an axial driving mechanism, which can simultaneously solve the problem of axial movement of the winding needle and the problem of adjusting the outer circumference of the winding needle, thereby avoiding the provision of an additional driving mechanism for adjusting the outer circumference of the winding needle, simplifying the structure of the winding needle, and at the same time saving equipment costs and production costs during the battery cell winding operation.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell processing, and particularly to a winding needle and a winding device. Background Art

[0002] During the production process of lithium batteries, a wound battery cell is formed by winding a separator and positive and negative electrode sheets through a winding needle mechanism of a winding machine. The outer circumference of the winding needle is related to the alignment of the electrode tab of the electrode sheet and the size of the battery cell. Therefore, the outer circumference of the winding needle directly affects the quality of the battery cell.

[0003] Currently, for a winding needle with an automatically adjustable outer circumference, the inner and outer needles are adjusted simultaneously through a wedge or a sliding groove. Generally, a driving mechanism inside or outside the winding needle provides a driving force to complete the adjustment of the outer circumference of the winding needle. However, when a driving mechanism is arranged inside the winding needle, the driving mechanism rotates together with the winding needle, and a conductive slip ring needs to be installed for power supply and signal transmission, resulting in a complex structure. When a driving mechanism is arranged outside the winding needle, its structure is complex, and an external thrust needs to be continuously applied to maintain the outer circumference of the winding needle, resulting in an increased cost. Summary of the Invention

[0004] In view of this, the present invention is committed to providing a winding needle that does not require an additional driving mechanism to adjust or maintain the outer circumference of the winding needle, and has a simple structure and a low cost. In addition, the present invention also provides a winding device applying the above winding needle.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A winding needle, comprising:

[0007] A winding needle body;

[0008] A push rod, arranged on the winding needle body and capable of axially displacing relative to the winding needle body, and a guiding surface is arranged on the push rod;

[0009] An outer needle body, sleeved outside the winding needle body;

[0010] A jacking member, connected to the outer needle body and located between the outer needle body and the winding needle body, and capable of contacting the guiding surface;

[0011] Wherein, the push rod can axially displace to make the jacking member slide on the guiding surface, so as to drive the outer needle body to radially displace relative to the winding needle body.

[0012] As a possible implementation manner, it further comprises:

[0013] A supporting beak assembly, provided with an abutting portion, and the abutting portion can abut against the push rod to drive the push rod to axially displace relative to the winding needle body.

[0014] As a possible implementation, the guiding surface is a first inclined surface or an arc surface.

[0015] As a possible implementation, it further includes a first limiting structure, and the first limiting structure includes:

[0016] A first strip-shaped sliding groove, which is arranged on one of the needle winding main body and the push rod and extends along the axial direction of the needle winding main body;

[0017] A limiting pin, which is arranged on the other of the needle winding main body and the push rod, extends into the first strip-shaped sliding groove, and is in sliding contact with two axial edges of the first strip-shaped sliding groove.

[0018] As a possible implementation, it further includes a second limiting structure, and the second limiting structure includes:

[0019] A limiting block, which is connected to the push rod, is provided with a second inclined surface parallel to the first inclined surface, and is provided with a second strip-shaped sliding groove extending along the axial direction of the needle winding main body. The jacking member passes through the second strip-shaped sliding groove and is in sliding contact with two axial edges of the second strip-shaped sliding groove;

[0020] A locking portion, which is arranged at one end where the jacking member passes through the second strip-shaped sliding groove and is located between the first inclined surface and the second inclined surface to radially lock with the second strip-shaped sliding groove.

[0021] As a possible implementation, it further includes:

[0022] A push rod reset assembly, which is provided with a first elastic member. One end of the first elastic member is connected to the needle winding main body, and the other end is connected to the push rod to apply a reset force to the push rod;

[0023] An outer needle body reset assembly, which is provided with a second elastic member. One end of the second elastic member is connected to the outer needle body, and the other end is connected to the needle winding main body to apply a reset force to the outer needle body.

[0024] As a possible implementation, the needle winding main body includes:

[0025] A base;

[0026] An inner needle body, which is arranged on the base, is set as an expandable structure, and approaches or moves away from the rotation axis of the needle winding main body by inflating and deflating;

[0027] An elastic component, which abuts against at least one end of the inner needle body to fix the inner needle body on the base.

[0028] As a possible implementation, the needle winding main body includes:

[0029] Base;

[0030] A plurality of the bases are symmetrically arranged about the rotation axis of the needle winding body and are all connected to the base. An installation groove for installing the elastic component is arranged on one side of the base close to the rotation axis of the needle winding body.

[0031] As a possible implementation manner, a plug-in portion is arranged at one end of the base away from the base, and the support beak assembly is provided with a receiving groove allowing the plug-in portion to be inserted and a blocking portion for blocking the push rod.

[0032] The present invention also provides a winding device, including the needle winding as described in any one of the above.

[0033] It can be seen from the above technical solutions that the needle winding provided by the present invention includes a needle winding body, a push rod, an outer needle body, and a lifting member. Among them, the push rod is arranged on the needle winding body and can axially displace relative to the needle winding body. The lifting member is connected to the outer needle body, and at the same time, it can contact the guiding surface of the push rod. When the push rod axially moves relative to the needle winding body, the lifting member slides on the guiding surface, so that the outer needle body radially displaces relative to the needle winding body. That is to say, the needle winding in the present invention can realize the radial movement of the outer needle body through the axial movement of the push rod relative to the needle winding body, skillfully using the mechanical structure to convert the problem of radial adjustment of the outer needle body into the problem of axial adjustment of the push rod. Furthermore, the needle winding only needs to be provided with an axial driving mechanism (such as a plugging and unplugging needle driving motor), and it can solve the problem of axial movement of the needle winding and the problem of adjusting the outer circumference of the needle winding at the same time. Furthermore, it can avoid setting an additional driving mechanism for adjusting the outer circumference of the needle winding, simplify the structure of the needle winding, and at the same time, save the equipment cost and the production cost during the cell winding operation. Description of the Drawings

[0034] Figure 1 Shown is a top view of the needle winding provided in the embodiment of the present invention;

[0035] Figure 2 Shown is Figure 1 the overall structural schematic diagram of the needle winding in

[0036] Figure 3 Shown is Figure 2 the top view of the needle winding in

[0037] Figure 4 Shown is Figure 1 the sectional view of the needle winding in

[0038] Figure 5 Shown is Figure 4 the partial enlarged view of area A in

[0039] Figure 6 As shown Figure 4 is a partial enlarged view of region B in

[0040] Figure 7 As shown Figure 3 is a sectional view of the winding needle in

[0041] Figure 8 is a schematic structural view of the push rod in the embodiment of the present invention;

[0042] Figure 9 is a schematic structural view of the limit block in the embodiment of the present invention;

[0043] Figure 10 is a schematic structural view of the lifting member in the embodiment of the present invention;

[0044] Figure 11 is a schematic structural view of the support bird assembly in the embodiment of the present invention.

[0045] In Figures 1-11 :

[0046] 1 - winding needle body, 2 - push rod, 3 - lifting member, 4 - outer needle body, 5 - support bird beak assembly, 6 - inner needle body, 7 - push rod return assembly, 8 - outer needle body return assembly, 9 - first limit structure, 10 - second limit structure, 11 - elastic assembly;

[0047] 101 - base, 102 - pedestal;

[0048] 201 - first inclined surface, 202 - through hole, 203 - limit pin;

[0049] 301 - locking portion;

[0050] 501 - abutting portion, 502 - receiving groove, 503 - fixing base;

[0051] 1001 - second inclined surface, 1002 - second strip-shaped chute;

[0052] 1101 - third elastic member, 1102 - slider;

[0053] 1021 - insertion portion, 1022 - installation groove. Detailed implementation manners

[0054] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0055] In addition, it should be noted that in the embodiments of the present application, the axial direction and the radial direction are both based on the rotation axis of the winding needle. That is to say, the axial direction refers to the direction parallel to the rotation axis of the winding needle, and the radial direction refers to the direction perpendicular to the rotation axis of the winding needle.

[0056] As Figures 1-11 shown, the winding needle provided in the embodiments of the present application includes a winding needle body 1, a push rod 2, an outer needle body 4, and a lifting member 3. Among them, the push rod 2 is arranged on the winding needle body 1 and can axially displace relative to the winding needle body 1. The lifting member 3 is connected to the outer needle body 4 and is located between the outer needle body 4 and the winding needle body 1. At the same time, it can contact the guiding surface of the push rod 2. When the push rod 2 axially moves relative to the winding needle body 1, the lifting member 3 slides on the guiding surface, so that the outer needle body 4 radially displaces relative to the winding needle body 1. That is to say, the winding needle in this embodiment realizes the movement of the outer needle body 4 in the radial direction through the axial movement of the push rod 2 relative to the winding needle body 1. Furthermore, only one axial driving mechanism needs to be provided for the winding needle to simultaneously solve the problems of the axial movement of the winding needle and the adjustment of the outer circumference of the winding needle. Moreover, an additional driving mechanism for adjusting the outer circumference of the winding needle can be avoided, simplifying the structure of the winding needle. At the same time, the equipment cost and the production cost during the cell winding operation are saved.

[0057] The winding needle with the above structure cleverly utilizes the mechanical structure to convert the problem of radial adjustment of the outer needle body 4 into the problem of axial adjustment of the push rod 2. Furthermore, only one axial driving mechanism (such as a plugging and unplugging needle driving motor) needs to be provided for the winding needle to simultaneously solve the problems of the axial movement of the winding needle and the adjustment of the outer circumference of the winding needle. Since there is no need to separately provide a winding needle outer circumference adjustment mechanism, the structure of the winding needle is simplified, and the energy consumption during the winding operation is reduced. Furthermore, while reducing the equipment cost, the production cost is also reduced.

[0058] For the convenience of understanding, taking the axial driving mechanism as a plugging and unplugging needle motor as an example, combined with the attached Figures 1-11 , the relevant technologies in the present application will be introduced in detail.

[0059] In some embodiments, the winding needle includes a support beak assembly 5, as Figure 11As shown, the support beak assembly 5 is provided with an abutting portion 501 capable of abutting against the push rod 2 to drive the push rod 2 to axially displace relative to the needle winding body 1. Specifically, during the needle insertion process, the needle inserting / removing motor drives the needle winding body 1 to axially move towards the support beak assembly 5. Since the push rod 2 is arranged on the needle winding body 1, during the initial movement, the push rod 2 will move towards the support beak assembly 5 together with the needle winding body 1 until the push rod 2 abuts against the abutting portion 501 of the support beak assembly 5. At this time, the needle inserting / removing motor continues to drive the main body to move in the direction towards the support beak assembly, while the push rod 2 will remain relatively stationary with respect to the support beak assembly 5 under the action of the support beak assembly 5, thereby causing relative movement between the push rod 2 and the main body. At the same time, the lifting member 3 slides on the guiding surface of the push rod 2, thereby driving the outer needle body 4 to radially displace relative to the needle winding body 1, achieving the adjustment of the outer circumference of the needle winding.

[0060] As mentioned above, the push rod 2 is provided with a guiding surface, and when the lifting member 3 slides on the guiding surface, it can drive the outer needle body 4 to radially displace relative to the needle winding body 1. Among them, there are various ways to set the guiding surface, and the present application does not make specific limitations. For example:

[0061] In some embodiments, as Figure 6 shown, the guiding surface is the first inclined surface 201. When relative displacement occurs between the push rod 2 and the needle winding body 1, the lifting member 3 slides along the first inclined surface 201 and, under the action of the first inclined surface 201, approaches or moves away from the needle winding body 1, thereby driving the outer needle body 4 to approach or move away from the needle winding body 1, achieving the adjustment of the outer circumference of the needle winding.

[0062] In other embodiments, the guiding surface is a curved arc surface. When relative displacement occurs between the push rod 2 and the needle winding body 1, the lifting member 3 slides along the arc surface and, under the action of the arc surface, approaches or moves away from the needle winding body 1, thereby driving the outer needle body 4 to approach or move away from the needle winding body 1, achieving the adjustment of the outer circumference of the needle winding.

[0063] Of course, the guiding surface can also be a wavy surface, etc.

[0064] In addition, the angle between the guiding surface and the rotation axis of the needle winding body 1 can be adaptively designed according to needs, and the present application does not make specific limitations. For example, when the axial movement amount of the push rod 2 is small while the required radial movement amount of the outer needle body 4 is large, the angle between the guiding surface and the rotation axis of the needle winding body 1 can be increased. Another example is that the smaller the angle between the guiding surface and the rotation axis of the needle winding body 1, the smaller the component force exerted by the push rod 2 on the lifting member 3 to cause the lifting member 3 to axially move. Therefore, when there is a need to reduce the above-mentioned component force, the angle between the guiding surface and the rotation axis of the needle winding body 1 can be reduced.

[0065] As Figure 10As shown, under the premise that the guiding surface is the first inclined surface 201, the end surface of the lifting member 3 close to one end of the push rod 2 is provided with a third inclined surface, and the first inclined surface 201 cooperates with the third inclined surface so that the lifting member 3 is perpendicular to the push rod 2, so that the interaction force between the push rod 2 and the lifting member 3 is evenly distributed on the contact surface between the two, so as to ensure the smoothness of the relative displacement between the lifting member 3 and the push rod 2.

[0066] In addition, the push rod 2 and the lifting member 3 can also be connected in transmission via a cam inclined surface or a cam guide groove structure.

[0067] During the cell winding process, the winding needle needs to rotate around its axis. In order to prevent the outer circumference of the winding needle from being uncontrollable under the centrifugal effect, a limiting structure can be provided to limit the radial movement of the outer needle body 4.

[0068] In some embodiments, Figures 2-4 As shown, a first limiting structure 9 is provided between the winding needle body 1 and the push rod 2, which is used to limit the movement of the push rod 2 in the radial direction relative to the winding needle body 1. In a specific embodiment, a push rod slide groove is provided on the side of the winding needle body 1 away from its rotation axis, and the push rod slide groove extends axially, and the push rod 2 is slidably provided in the push rod slide groove. The first limiting structure 9 includes a first strip slide groove provided on the side wall of the push rod slide groove, and a limiting pin 203 provided on the push rod 2; wherein, the first strip slide groove extends axially along the winding needle body 1, and the limiting pin 203 extends into the first strip slide groove and slides with the two axial edges of the first strip slide groove. Under the action of the first strip slide groove and the limiting pin 203, the push rod 2 can only move along the extension direction of the first strip slide groove, thereby achieving the technical purpose of limiting the radial movement between the push rod 2 and the winding needle body 1. In another specific embodiment, a push rod slot is provided on one side of the winding needle body 1 away from its rotation axis, and the push rod slot extends axially, and the push rod 2 is slidably provided in the push rod slot. The first limiting structure 9 includes a first strip slot provided on the push rod 2, and a limiting pin 203 provided on the side wall of the push rod slot; wherein the first strip slot extends axially along the winding needle body 1, and the limiting pin 203 extends into the first strip slot and slides with the two axial edges of the first strip slot. Under the action of the first strip slot and the limiting pin 203, the push rod 2 can only move along the extension direction of the first strip slot, thereby achieving the technical purpose of limiting the radial movement between the push rod 2 and the winding needle body 1.

[0069] Continue as Figure 2As shown, in some embodiments, a second limiting structure 10 is provided between the push rod 2 and the lifting member 3 to limit the amount of movement of the outer needle body 4 relative to the push rod 2 in the radial direction. In a specific embodiment, the second limiting portion includes a limiting block and a locking portion 301. One end of the limiting block in the axial direction is connected to the push rod 2, and the other end is provided with a limiting surface parallel to the guiding surface, and a second strip-shaped chute 1002 extending along the axial direction of the needle winding body 1 is formed. The lifting member 3 passes through the second strip-shaped chute 1002 and is in sliding contact with the two axial edges of the second strip-shaped chute 1002; the locking portion 301 is provided at one end of the lifting member 3 passing through the second strip-shaped chute 1002 and is located between the guiding surface and the limiting surface to radially lock with the second strip-shaped chute 1002. In this way, while the lifting member 3 can move along the extension direction of the inclined chute, the radial movement of the lifting member 3 is restricted, so that it can only perform an accurate radial displacement along with the movement of the push rod 2. Further, in a more specific embodiment, the guiding surface is a first inclined surface 201, and the limiting surface is a second inclined surface 1001 parallel to the guiding surface.

[0070] In addition, in another specific embodiment, the second limiting structure 10 includes a limiting block and a locking portion 301, a second strip-shaped chute 1002 extending along the axial direction of the needle winding body 1 is formed, and a guiding groove parallel to the guiding surface is provided in the side wall of the second strip-shaped groove. The locking portion 301 is provided at one end of the lifting member 3 passing through the second strip-shaped chute 1002 and extends into the guiding groove to radially lock with the second strip-shaped chute 1002. In this way, while the lifting member 3 can move along the extension direction of the inclined chute, the radial movement of the lifting member 3 is restricted, so that it can only perform an accurate radial displacement along with the movement of the push rod 2. Further, in a more specific embodiment, the guiding surface is a first inclined surface 201, and the limiting surface is a second inclined surface 1001 parallel to the guiding surface.

[0071] As described above, the first limiting structure 9 restricts the movement of the push rod 2 relative to the needle winding body 1 in the radial direction, and the second limiting structure 10 restricts the movement of the push rod 2 relative to the outer needle body 4 in the radial direction; that is, through the cooperation of the first limiting structure 9 and the second limiting structure 10, it is possible to prevent the outer needle body 4 from undergoing an uncontrollable radial centrifugal relative movement during the high-speed rotation of the needle winding.

[0072] In addition, in order to achieve the automatic reset of the outer needle body 4, the needle winding in the embodiment of the present application is further provided with a push rod reset assembly 7 and an outer needle body reset assembly 8. Among them, the push rod reset assembly 7 is arranged between the needle winding body 1 and the push rod 2 to apply a reset force to the push rod 2. The outer needle body reset assembly 8 is arranged between the needle winding body 1 and the outer needle body 4 to apply a reset force to the outer needle body 4.

[0073] In some embodiments, the push rod reset assembly 7 includes a first elastic member. One end of the first elastic member is connected to the inner needle body 6, and the other end is connected to the push rod 2. The outer needle body reset assembly 8 includes a second elastic member. One end of the second elastic member is connected to the outer needle body 4, and the other end is connected to the inner needle body 6. During the needle insertion process, under the action of the insertion and extraction needle driving motor, the push rod 2 abuts against the abutting portion 501 of the support beak assembly 5. And, under the action of the abutting portion 501, a relative displacement occurs between the push rod 2 and the needle winding body 1 in the axial direction, thereby causing the first elastic member to be compressed or stretched; at the same time, during the process of the push rod 2 moving axially relative to the needle winding body 1, the lifting member 3 will move radially under the action of the push rod 2, thereby causing the outer needle body 4 to expand outward, and the second elastic member to be stretched. During the needle extraction process, under the action of the insertion and extraction needle driving motor, the needle winding body 1 moves away from the support bird assembly. A relative displacement occurs between the needle winding body 1 and the push rod 2 under the elastic force of the first elastic member, causing the push rod 2 to gradually reset; at the same time, the lifting member 3 moves radially under the action of the second elastic member and gradually resets.

[0074] In a specific embodiment, the push rod reset assembly 7 further includes a baffle, and the first elastic member is a compression spring. The push rod 2 is provided with a long strip-shaped through hole 202 for accommodating the compression spring and allowing relative movement between the baffle and the push rod 2. One end of the baffle is fixed on the needle winding body 1, and the other end extends into the long strip-shaped through hole 202. One end of the compression spring is fixed on the baffle, and the other end is connected to the side wall of the through hole 202. During the needle insertion process, as the push rod 2 and the needle winding body 1 move relatively, the compression spring is gradually compressed; during the needle extraction process, the elastic potential energy of the compression spring is released, thereby realizing the automatic reset of the push rod 2.

[0075] In another specific embodiment, the outer needle body reset assembly 8 further includes a first pull rod and a second pull rod. Among them, the first pull rod is fixedly arranged on the outer needle body 4, and the second pull rod is fixedly arranged on the needle winding body 1. The second elastic member is a tension spring, and both ends of the tension spring are respectively connected to the first pull rod and the second pull rod. During the needle insertion process, the outer needle body 4 expands outward under the action of the variable diameter adjusting mechanism, and the tension spring is stretched; during the needle extraction process, the elastic potential energy of the tension spring is released, thereby realizing the automatic reset of the outer needle body 4.

[0076] As Figures 2-4 shown, the needle winding body 1 in the embodiment of the present application further includes a base 102, an inner needle body 6 and an elastic assembly 11. Among them, the inner needle body 6 is arranged on the base 102 and is used for clamping the diaphragm.

[0077] In some embodiments, the inner needle body 6 is an expandable structure, and the expansion and contraction of the expandable structure are realized by inflating and deflating, so as to approach or move away from the rotation axis of the needle winding body 1, so that the expandable structure presses against the diaphragm passing through the needle winding body 1. In this way, no mechanical transmission structure is required for cooperation, which is convenient for installation and has a stable structure.

[0078] Further preferably, the expansion structure includes an airbag seat and an airbag body. The airbag seat is arranged on the winding needle body 1 to achieve overall fixed connection. The airbag body is arranged on one side of the airbag seat close to the rotation axis of the winding needle body 1 and can approach and move away from the rotation axis of the winding needle body 1 by inflating and deflating. By arranging the expandable airbag body on one side of the airbag seat close to the rotation axis of the winding needle body 1, only the side of the airbag seat expands and contracts, so as to quickly achieve clamping and releasing of the diaphragm, and at the same time is beneficial to ensuring the stability of the installation of the airbag seat. Specifically, an airbag groove is arranged on the airbag seat, and the airbag body is arranged in the airbag groove, which is beneficial to the protection of the airbag body. Moreover, the airbag body is first inflated in the airbag groove and then expands outside the airbag groove, which is beneficial to improving the force stability of the airbag seat.

[0079] In order to clamp the diaphragm, multiple airbag bodies and airbag seats are provided, such as two, four, etc. The specific number of settings is not limited in this application. For example, in some embodiments, two airbag bodies and airbag seats are provided and are symmetrically arranged about the rotation axis of the winding needle body 1. Before the core winding starts, one end of the diaphragm is placed between the two airbag bodies, and then the airbag bodies are inflated, and the diaphragm can be clamped by the airbag bodies. After the core winding is completed, only the airbag bodies need to be deflated, and the wound core can be removed.

[0080] As mentioned above, the inner needle body 6 is arranged on the winding needle body 1. In some embodiments, the winding needle body 1 further includes a base 101. In some embodiments, multiple bases 102 are provided, and the multiple bases 102 are symmetrically arranged about the rotation axis of the winding needle body 1 and are all connected to the base 101. An installation groove 1022 is arranged on one side of the base 102 close to the rotation axis of the winding needle body 1, and the inner needle body 6 is arranged in the installation groove 1022. Further, in some embodiments, an elastic component 11 is arranged in the installation groove 1022, and the inner needle body 6 is fixed in the installation groove 1022 of the winding needle body 1 by using the elastic component 11 to achieve quick disassembly and assembly of the inner needle body 6, so that the inner needle body 6 is convenient for replacement or maintenance.

[0081] In a specific embodiment, the elastic component 11 includes a third elastic member 1101. One end of the third elastic member 1101 is connected to the side wall of the installation groove 1022, and the other end is connected with a slider 1102. A protrusion is arranged at one end of the slider 1102 facing the inner needle body 6, and grooves are arranged at both ends of the airbag seat of the inner needle body 6 in the axial direction.

[0082] Preferably, the number of the elastic components 11 is one, and it is arranged on the side wall of any end of the mounting groove 1022 along the axial direction. At the same time, a fixing pin or a protrusion matching the groove is arranged at the other end of the groove. When the inner needle body 6 is installed, the slider 1102 is moved in the direction of compressing the third elastic component 1101, and then the inner needle body 6 is placed in the mounting groove 1022, and the fixing pin or the protrusion arranged on the mounting groove 1022 extends into the groove of the airbag seat. After that, the slider 1102 is released, and it moves towards the airbag seat under the action of the elastic force of the third elastic component 1101, and the protrusion on the slider 1102 extends into the groove of the airbag seat, thereby realizing the fixation of the inner needle body 6. When the inner needle body 6 needs to be disassembled, only the slider 1102 needs to be moved in the direction of compressing the elastic component, so that the protrusion on the slider 1102 is separated from the groove of the airbag seat. Of course, when not considering the influence of the elastic component 11 on the axial length of the coiling needle or the inner needle body 6, the elastic components 11 can also be arranged at both ends of the mounting groove 1022 along the axial direction.

[0083] In a specific embodiment, the third elastic component 1101 is a compression spring, and after the inner needle body 6 is installed in the mounting groove 1022, the compression spring is in a compressed state.

[0084] As Figure 11 shown, in some embodiments, a plug-in portion 1021 is arranged at one end of the base 102 close to the support beak assembly 5 (that is, the end far from the base 101), and a receiving groove 502 (such as an annular groove) and a blocking portion allowing the plug-in portion to be inserted are arranged on the support beak assembly 5. Among them, the receiving groove 502 is used to receive the above plug-in portion 1021, and the blocking portion is used to block the push rod. During the needle insertion process, the coiling needle body 1 moves towards the support beak assembly 5 under the action of the plugging and unplugging needle motor. When the push rod 2 abuts against the blocking portion of the support beak assembly 5, the plug-in portion 1021 can still further extend into the receiving groove 502, thereby generating a relative displacement between the push rod 2 and the coiling needle body 1. In a specific embodiment, both the receiving groove 502 and the blocking portion are arranged on the abutting portion 501.

[0085] In addition, the support beak assembly 5 further includes a fixing seat 503 for fixing it, and the abutting portion 501 is rotatably arranged on the fixing seat 503. For example, in a specific embodiment, the abutting portion 501 is connected to the fixing seat 503 through a bearing. Of course, the specific structure of the support beak assembly 5 can also refer to the needle beak in the prior art. However, in comparison, the support beak structure in the present application is additionally provided with an abutting portion 501 capable of abutting against the push rod 2.

[0086] In addition, the embodiment of the present invention further provides a winding device, which includes the above coiling needle. Since the winding device includes the above coiling needle, for the beneficial effects brought by the coiling needle to the winding device, please refer to the above content and will not be elaborated here.

[0087] The basic principles of the present invention have been described above in connection with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present invention are merely examples and not limitations. It cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present invention. In addition, the above-disclosed specific details are only for illustrative and easy-to-understand purposes, rather than limitations. These details do not limit the present invention to necessarily adopt the above specific details for implementation.

[0088] It should also be noted that in the devices, equipment and methods of the present invention, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations shall be regarded as equivalent solutions of the present invention.

[0089] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0090] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present invention are only for more clearly explaining the technical solutions and cannot be used to limit the protection scope of the present invention.

[0091] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A coiling needle, characterized in that, Comprising: A reel needle body; A push rod, disposed on the reel needle body and capable of axially displacing relative to the reel needle body, and a guiding surface is provided on the push rod, and the guiding surface is a first inclined surface; An outer needle body, sleeved outside the reel needle body; A lifting member, connected to the outer needle body and located between the outer needle body and the reel needle body, and capable of contacting the guiding surface, and the lifting member is perpendicularly disposed with respect to the push rod; A first limiting structure, comprising a first strip-shaped chute and a limiting pin, the first strip-shaped chute is provided on one of the reel needle body and the push rod and extends along the axial direction of the reel needle body; the limiting pin is provided on the other of the reel needle body and the push rod and extends into the first strip-shaped chute and is in sliding contact with two axial edges of the first strip-shaped chute; A second limiting structure, comprising a limiting block and a locking portion, the limiting block is connected to the push rod and is provided with a second inclined surface parallel to the first inclined surface, and a second strip-shaped chute extending along the axial direction of the reel needle body is provided, the lifting member passes through the second strip-shaped chute and is in sliding contact with two axial edges of the second strip-shaped chute, and the locking portion is provided at one end where the lifting member passes through the second strip-shaped chute and is located between the first inclined surface and the second inclined surface to radially lock with the second strip-shaped chute.

2. The coiling needle according to claim 1, wherein, Further comprising: A push rod reset assembly, provided with a first elastic member, one end of the first elastic member is connected to the reel needle body and the other end is connected to the push rod to apply a reset force to the push rod; An outer needle body reset assembly, provided with a second elastic member, one end of the second elastic member is connected to the outer needle body and the other end is connected to the reel needle body to apply a reset force to the outer needle body.

3. The coiling needle according to any one of claims 1-2, characterized in that, The reel needle body comprises: A base; An inner needle body, disposed on the base and configured as an expandable structure, and approaching or departing from the rotation axis of the reel needle body by inflation and deflation; An elastic assembly, abutted against at least one end of the inner needle body to fix the inner needle body on the base.

4. The coiling needle according to claim 3, wherein The reel needle body comprises: A base; A plurality of the bases, symmetrically disposed about the rotation axis of the reel needle body and all connected to the base, and an installation groove capable of installing the elastic assembly is provided on a side of the base close to the rotation axis of the reel needle body.

5. The coiling needle according to claim 4, characterized in that, One end of the base away from the base is provided with a plugging portion.

6. The coiling needle according to claim 5, wherein, Further comprising: A supporting beak assembly, provided with an abutting portion, a receiving groove and a blocking portion, and the abutting portion can abut against the push rod; The receiving groove can allow the plugging portion to be inserted, the blocking portion can block the push rod, and both the receiving groove and the blocking portion are provided on the abutting portion.

7. A winding device, characterized in that, Comprising the reel needle according to any one of claims 1-6.

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