CN113725469B

CN113725469B - Winding needle device and winding equipment

Info

Publication number: CN113725469B
Application number: CN202110705157.4A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Wuxi Lead Intelligent Equipment Co Ltd
Current assignee: Wuxi Lead Intelligent Equipment Co Ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2024-07-30
Anticipated expiration: 2041-06-24
Also published as: CN113725469A

Abstract

The invention relates to a winding needle device and winding equipment. The winding needle device comprises: a rotation mechanism controllably rotatable about a first axis of rotation; the needle rolling mechanism comprises a needle rolling seat, a first needle rolling seat and a second needle rolling seat which are oppositely arranged on the needle rolling seat, the needle rolling seat is connected with the rotating mechanism, and the first needle rolling seat can move relative to the needle rolling seat towards the direction approaching or far away from the second needle rolling seat; the first driving matching piece is matched with the first driving piece and drives the first winding needle to be close to or far from the second winding needle in response to the movement of the first driving piece along the first direction; and the adjusting mechanism is arranged on the rotating mechanism and is in transmission connection with the first driving piece, and the adjusting mechanism is controlled to drive the first driving piece to move along the first direction.

Description

Winding needle device and winding equipment

Technical Field

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

Background

In the process of preparing the battery core, a winding device is generally adopted to wind a pole piece, a diaphragm and other material belts so as to form the battery core of the battery. In the actual production process, the circumference of the winding needle is often required to be frequently adjusted (namely, the circumference is adjusted by adjusting the radial dimension of the winding needle) so as to ensure the alignment degree of the tabs of the produced battery cells. However, in the prior art, the purpose of adjusting the circumference of the winding needle is often achieved by sticking the teflon sheet on the winding needle, the operation time is long, and the production efficiency is reduced.

Disclosure of Invention

Based on the above, it is necessary to provide a winding needle device and a winding apparatus for improving the above-mentioned drawbacks, which aims at solving the problems that the prior art adopts a method of sticking a teflon sheet on a winding needle to achieve the purpose of adjusting the circumference of the winding needle, the operation time is long, and the production efficiency is reduced.

A needle winding device comprising:

A rotation mechanism controllably rotatable about a first axis of rotation;

The needle rolling mechanism comprises a needle rolling seat, a first needle rolling seat and a second needle rolling seat which are oppositely arranged on the needle rolling seat, the needle rolling seat is connected with the rotating mechanism, and the first needle rolling seat can move relative to the needle rolling seat towards the direction approaching to or far from the second needle rolling seat;

The winding needle mechanism further comprises a first driving piece movably connected to the winding needle seat along a first direction parallel to the first rotation axis and a first driving matching piece connected to the first winding needle, wherein the first driving matching piece is matched with the first driving piece and drives the first winding needle to be close to or far away from the second winding needle in response to the movement of the first driving piece along the first direction; and

The adjusting mechanism is arranged on the rotating mechanism and is in transmission connection with the first driving piece, and the adjusting mechanism is controlled to drive the first driving piece to move along the first direction.

In one embodiment, the adjusting mechanism comprises an adjusting member, an adjusting matching member and a moving member, wherein the adjusting member is matched with the rotating mechanism and rotates or stops rotating synchronously with the rotating mechanism in a controlled way, the adjusting matching member is mounted on the rotating mechanism and is in transmission connection with the adjusting member, the moving member is movably connected with the rotating mechanism along the first direction and is in transmission connection with the adjusting matching member, and the first driving member is connected with the moving member;

When the adjusting member stops rotating with the rotating mechanism, the adjusting fitting member rotates with the rotating mechanism to generate first relative rotation with the adjusting member around the first rotating axis, and the moving member moves along the first direction in response to the first relative rotation.

In one embodiment, the adjusting member is an adjusting shaft, the axis of the adjusting shaft is collinear with the first rotation axis, the adjusting fitting member is an adjusting fitting shaft, the adjusting fitting shaft is rotatably connected to the rotation mechanism around a second rotation axis parallel to the first rotation axis, and the adjusting shaft is in transmission connection with the adjusting fitting shaft;

The adjusting mechanism further comprises a screw sleeve which is connected with the adjusting matching shaft in a threaded mode and connected with the moving piece.

In one embodiment, the adjusting mechanism further comprises a driving gear and a driven gear, wherein the driving gear is installed on the adjusting shaft, and the driven gear is installed on the adjusting matching shaft and meshed with the driving gear.

In one embodiment, one end of the adjusting shaft is rotatably connected with the rotating mechanism around the first rotating axis, and the other end of the adjusting shaft penetrates out of the rotating mechanism and is provided with a rotation stopping section;

The needle winding device further includes a control mechanism having a control end that is controllably movable to and coupled with the anti-rotation section of the adjustment shaft.

In one embodiment, the winding needle device further comprises a rotation stopping mechanism connected to the rotating mechanism and provided with a rotation stopping end, and the rotation stopping end of the rotation stopping mechanism is matched with the rotation stopping section;

When the control end of the control mechanism is controlled to move to the rotation stopping section, the control end is matched with the rotation stopping section and pushes the rotation stopping end away from the rotation stopping section.

In one embodiment, the rotation stopping mechanism includes an end cover, a rotation stopping block and a first plunger, the end cover is mounted on the rotation mechanism, the rotation stopping block is disposed on the end cover and is used as the rotation stopping end, the rotation stopping block is provided with a through hole, the first plunger is disposed on the rotation stopping block and extends into the through hole at least partially along the radial direction of the through hole, the adjusting shaft is rotatably connected to the end cover, and the rotation stopping section of the adjusting shaft is arranged through the through hole;

The rotation stopping section of the adjusting shaft is provided with a rotation stopping groove, and the part of the first plunger located in the through hole stretches into the rotation stopping groove.

In one embodiment, the rotating mechanism comprises a rotating sleeve, a first sliding sleeve, a second sliding sleeve and a rotating frame, wherein the rotating sleeve can rotate around the first rotating axis in a controlled manner, the first sliding sleeve and the rotating sleeve are sleeved in the rotating sleeve in a synchronous rotating manner, and move in a controlled manner along the first direction relative to the rotating sleeve, the second sliding sleeve and the first sliding sleeve are sleeved in the first sliding sleeve in a synchronous rotating manner, move in a controlled manner along the first direction relative to the first sliding sleeve, and the rotating frame is positioned in the second sliding sleeve and connected with the first sliding sleeve;

The first rolling needle seat is connected with the rotating frame, the second rolling needle seat is connected with the second sliding sleeve, the first rolling needle seat and the second rolling needle seat are respectively arranged on the side surfaces of the first rolling needle seat and the second rolling needle seat, which are away from each other, the first rolling needle seat can move relative to the first rolling needle seat towards the direction of approaching or separating from the second rolling needle seat, and the first driving piece is movably connected with the first rolling needle seat along the first direction;

the adjusting piece is arranged in the second sliding sleeve and is controlled to synchronously rotate or stop rotating along with the rotating frame, the adjusting matching piece is arranged on the rotating frame, and the moving piece is movably connected with the rotating frame along the first direction.

In one embodiment, at least one of the first driving member and the first driving mating member has a first inclined surface in sliding fit with the other, the first inclined surface is inclined relative to the first rotation axis, and when the first driving member moves relative to the first driving mating member along the first direction, the first driving mating member drives the first winding needle to move in a direction away from the second winding needle.

In one embodiment, the needle winding mechanism further comprises a first limiting piece and a first elastic piece, wherein the first limiting piece comprises a first rod part and a first head part connected to one end of the first rod part, the first rod part penetrates through the first needle winding seat and is connected with the first needle winding seat, and the first head part is positioned at one side of the first needle winding seat away from the second needle winding seat;

Opposite ends of the first elastic piece are respectively abutted to the first head part and the first winding needle and used for providing pretightening force for enabling the first winding needle to move along the first rod part close to the second winding needle.

In one embodiment, the second winding needle is movably connected to the second winding needle seat towards the direction approaching or separating from the first winding needle;

The second driving part can move along the first direction along the moving part, the second driving matching part is matched with the second driving part, and the second driving part moves along the first direction along the second direction to drive the second winding needle to approach or depart from the first winding needle.

In one embodiment, at least one of the second driving member and the second driving mating member has a second inclined surface in sliding fit with the other, the second inclined surface is inclined relative to the first rotation axis, and when the second driving member moves along the first rotation axis relative to the second driving mating member, the second driving mating member is pushed to drive the second winding needle to be far away from the first winding needle.

In one embodiment, the needle winding mechanism further comprises a second limiting piece and a second elastic piece, wherein the second limiting piece comprises a second rod part and a second head part connected to one end of the second rod part, the second rod part penetrates through the second needle winding seat and is connected with the second needle winding seat, and the second head part is positioned at one side of the second needle winding seat away from the first needle winding seat;

Opposite ends of the second elastic piece are respectively abutted to the second head part and the second winding needle and used for providing pretightening force for enabling the second winding needle to move along the second rod part close to the first winding needle.

In one embodiment, the rotating mechanism further comprises a swinging assembly, the swinging assembly comprises a mounting seat, a swinging piece and a third elastic piece, the mounting seat is connected to the second sliding sleeve, one end of the swinging piece is rotatably connected to the mounting seat around a third rotation axis intersecting with the first rotation axis, and the other end of the swinging piece is connected with the second needle reeling seat; the third elastic piece is abutted between the swinging piece and the mounting seat and is used for providing pretightening force for enabling the swinging piece to drive the second winding needle to swing around the third rotation axis towards the direction close to the first winding needle.

A winding apparatus comprising a winding needle device as claimed in any one of the preceding claims.

According to the winding needle device and the winding equipment, the outer contours formed by splicing the first winding needle and the second winding needle which are oppositely arranged are used for winding the material belt, so that the battery cell is formed. That is, the circumference of the outer contour formed by the first winding needle and the second winding needle is the circumference of the winding needle. The rotating mechanism drives the needle rolling seat to rotate around the first rotating axis, so that the first needle rolling seat and the second needle rolling seat rotate around the first rotating axis along with the needle rolling seat, and the material belt is wound on the outer contour formed by splicing the first needle rolling seat and the second needle rolling seat. When the circumference of the winding needle needs to be adjusted, the adjusting mechanism drives the first driving piece to move along the first direction, so that the first driving matching piece responds to the movement of the first driving piece along the first direction to drive the first winding needle to approach or depart from the second winding needle, and the purpose of reducing or increasing the circumference of the winding needle is achieved.

Therefore, compared with the mode of sticking the teflon sheet in the prior art, the circumference adjustment process of the winding needle is simple and quick, the adjustment precision is high, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic view of a needle winding device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the needle winding device of the embodiment shown in FIG. 1 taken along the direction A-A;

FIG. 3 is a cross-sectional view of a needle winding mechanism of the needle winding device shown in FIG. 2;

FIG. 4 is a cross-sectional view of the rotation mechanism and adjustment mechanism of the needle roller device shown in FIG. 2;

FIG. 5 is a schematic diagram of the transmission structure of the adjusting mechanism and the needle winding mechanism of the needle winding device shown in FIG. 2;

fig. 6 is a schematic structural diagram of a rotation stopping mechanism and a control mechanism of a winding needle device according to an embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a needle winding device, which includes a rotation mechanism 10, a needle winding mechanism 20 and an adjusting mechanism 30.

The rotation mechanism 10 is controllably rotatable about a first axis of rotation. The needle winding mechanism 20 includes a needle winding seat, and a first needle winding 22a and a second needle winding 22b disposed opposite to the needle winding seat. The winding hub is connected to the rotation mechanism 10 for rotation with the rotation mechanism 10 about a first axis of rotation. The first winding needle 22a is movable relative to the winding needle holder in a direction approaching or moving away from the second winding needle 22b. The winding needle mechanism 20 further includes a first driving member 23a and a first driving engagement member 24a, the first driving member 23a is movably connected to the winding needle seat along a first direction parallel to the first rotation axis, and the first driving engagement member 24a is connected to the first winding needle 22a and engages with the first driving member 23a, so that the first driving engagement member 24a drives the first winding needle 22a to approach or separate toward the second winding needle 22b in response to the movement of the first driving member 23a along the first direction. The adjusting mechanism 30 is disposed on the rotating mechanism 10 and is in transmission connection with the first driving member 23a, and the adjusting mechanism 30 is controlled to drive the first driving member 23a to move along the first direction.

In the winding needle device, the outer contour formed by splicing the first winding needle 22a and the second winding needle 22b which are oppositely arranged is used for winding the material belt, so that the battery cell is formed. That is, the circumference of the outer contour formed by the first winding needle 22a and the second winding needle 22b is the circumference of the winding needle. The rotating mechanism 10 drives the winding needle seat to rotate around the first rotating axis, so that the first winding needle 22a and the second winding needle 22b rotate along with the winding needle seat around the first rotating axis, and the material belt is wound on the outer contour formed by the splicing of the first winding needle 22a and the second winding needle 22 b. When the circumference of the winding needle needs to be adjusted, the adjusting mechanism 30 drives the first driving member 23a to move along the first direction, so that the first driving mating member 24a drives the first winding needle 22a to approach or separate from the second winding needle 22b in response to the movement of the first driving member 23a along the first direction, thereby achieving the purpose of reducing or increasing the circumference of the winding needle. In the embodiment shown in fig. 3, the first direction is the up-down direction.

Therefore, in the winding needle device, the first driving piece 23a is driven to move along the first direction by the adjusting mechanism 30 to realize the perimeter adjustment of the winding needle, and compared with the mode of sticking the teflon sheet in the prior art, the winding needle device has the advantages of simple and quick perimeter adjustment process, high adjustment precision and contribution to improving the production efficiency.

In the embodiment of the invention, the adjusting mechanism 30 includes an adjusting member 31, an adjusting mating member 32 and a moving member 34. The adjusting member 31 is coupled to the rotary mechanism 10 and is controlled to rotate synchronously with the rotary mechanism 10 or to stop rotating. The adjustment fitting 32 is mounted to the rotation mechanism 10 so as to rotate synchronously with the rotation mechanism 10, and the adjustment fitting 32 is in driving connection with the adjustment member 31. The moving member 34 is movably coupled to the rotary mechanism 10 in a first direction and is drivingly coupled to the adjustment fitting 32. The first actuating member 23a is coupled to the moving member 34 such that the first actuating member 23a moves in a first direction along with the moving member 34.

When the adjusting member 31 stops rotating with the rotating mechanism 10, the adjusting engaging member 32 rotates with the rotating mechanism 10 to generate a first relative rotation with the adjusting member 31 about the first rotation axis, the moving member 34 moves along the first direction in response to the first relative rotation, so as to drive the first driving member 23a to move along the first direction, and the first driving engaging member 24a drives the first winding needle 22a to move close to or far from the second winding needle 22b in response to the movement of the first driving member 23a along the first direction, so as to achieve the purpose of adjusting the circumference of the winding needle. That is, the rotation mechanism 10 makes the adjustment member 31 and the adjustment mating member 32 generate the first relative rotation, that is, the rotation motion of the rotation mechanism 10 is transmitted to the adjustment mating member 32, and the adjustment mating member 32 converts the rotation motion into the linear motion of the moving member 34 moving along the first direction, so that the first driving member 23a and the first driving mating member 24a convert the linear motion along the first direction into the linear motion of the first winding needle 22a approaching or separating from the second winding needle 22b, and finally the purpose of adjusting the circumference of the winding needle is achieved.

It should be noted that, the power for adjusting the circumference of the winding needle is derived from the winding power of the rotating mechanism 10, so that an additional power mechanism is not required, the structure is simplified, and the space occupied by the equipment is saved.

It should be further noted that, since the adjusting mechanism 30 is disposed on the rotating mechanism 10, the circumference of the winding needle can be adjusted in the process that the rotating mechanism 10 drives the first winding needle 22a and the second winding needle 22b to rotate around the first rotation axis, so that the main time sequence time of the winding operation is not occupied, the effect of the winding operation is not affected, and the production efficiency is further improved.

In some embodiments, the adjusting member 31 is an adjusting shaft 311, the axis of the adjusting shaft 311 is collinear with the first rotation axis, and a driving gear 312 is mounted on the adjusting shaft 311. The adjustment fitting 32 is an adjustment fitting shaft 321, and the adjustment fitting shaft 321 is rotatably connected to the rotation mechanism 10 about a second rotation axis parallel to the first rotation axis. The adjustment shaft 311 is in driving connection with the adjustment mating shaft 321 such that when the adjustment mating shaft 321 rotates about a first rotational axis (i.e., generates the first relative rotation) with respect to the adjustment shaft 311, the adjustment mating shaft 321 is driven to rotate about its own axis (i.e., rotate about the second axis). The adjustment mechanism 30 further includes a threaded sleeve 33, and the threaded sleeve 33 is threadedly coupled to the adjustment mating shaft 321 and coupled to the moving member 34 such that the threaded sleeve 33 moves in a first direction with the moving member 34.

In particular embodiments, the adjustment mechanism 30 further includes a driving gear 312 and a driven gear 322. The driving gear 312 is mounted on the adjustment shaft 311, and the driven gear 322 is mounted on the adjustment mating shaft 321 and is engaged with the driving gear 312, so that the driving connection between the adjustment shaft 311 and the adjustment mating shaft 321 is achieved by the engagement of the driving gear 312 and the driven gear 322.

Thus, when it is necessary to adjust the circumferential length of the winding needle, the adjustment shaft 311 stops rotating following the rotation mechanism 10, so that the adjustment mating shaft 321 revolves around the adjustment shaft 311, and at this time, the adjustment mating shaft 321 rotates around the second rotation axis due to the meshing of the driving gear 312 and the driven gear 322. Since the threaded sleeve 33 is in threaded connection with the adjustment matching shaft 321, the threaded sleeve 33 and the moving member 34 connected with the threaded sleeve 33 can be driven to move along the axial direction (i.e., the first direction) of the adjustment matching shaft 321 when the adjustment matching shaft 321 rotates around the second rotation axis, that is, the rotation motion of the rotation mechanism 10 is converted into the rotation motion of the adjustment matching shaft 321 around the second rotation axis, and then is converted into the linear motion of the moving member 34 along the first direction.

When the circumference of the winding needle is adjusted in place, the adjusting shaft 311 rotates synchronously with the rotating mechanism 10, so that the adjusting shaft 311 and the adjusting shaft 321 do not generate the first relative rotation, and the first winding needle 22a stops moving relative to the second winding needle 22b, that is, the circumference of the winding needle stops being adjusted. At this time, the rotation mechanism 10 drives the winding needle stand to rotate around the first rotation axis, and further drives the first winding needle 22a and the second winding needle 22b to rotate around the first rotation axis, so as to perform the winding operation.

It should be noted that, of course, the circumference of the winding needle may be adjusted when the rotation mechanism 10 does not rotate around the first rotation axis, at this time, only the adjusting shaft 311 is connected with the external driving mechanism, and the external driving mechanism is used to drive the adjusting shaft 311 to rotate around the self axis (i.e. the first rotation axis), so that the driving gear and the driven gear drive the adjusting matching piece 321 to rotate around the self axis (i.e. the second rotation axis), and then the screw sleeve 33 drives the moving piece 34 to move along the first direction, and finally the first driving piece 23a and the first driving matching piece 24a drive the first winding needle 22a to approach or separate from the second winding needle 22b, so that the circumference of the winding needle may also be adjusted.

It should be further noted that, in order to avoid the engagement of the driving gear 312 and the driven gear 322 from interfering with the execution of the needle drawing and inserting actions described below, in one embodiment, the driven gear 322 is movably connected to the adjustment fitting shaft 321 in the axial direction (i.e., the first direction) of the adjustment fitting shaft 321. That is, the driven gear 322 is axially movable a certain distance with respect to the adjustment fitting shaft 321, so that the driven gear 322 is not axially movable following the adjustment fitting shaft 321 when the following needle drawing and inserting actions are performed, so that the driven gear 322 and the driving gear 312 are always kept engaged with each other.

More specifically, a key connection may be employed between the driven gear 322 and the adjustment fitting shaft 321 such that the driven gear 322 and the adjustment fitting shaft 321, and the driven gear 322 and the adjustment fitting shaft 321 are relatively movable in the first direction by a certain distance.

Referring to fig. 6, in the embodiment, one end of the adjusting shaft 311 is rotatably connected to the rotation mechanism 10 around the first rotation axis, and the other end of the adjusting shaft 311 passes through the rotation mechanism 10 and has a rotation stop section 314. The needle device further comprises a control mechanism 50, the control mechanism 50 having a control end which is controllably movable to a rotation stop section 314 of the adjustment shaft 311 and which is coupled to the rotation stop section 314.

Thus, when the control end of the control mechanism 50 is not moved to the rotation stop section 314 of the adjustment shaft 311, the adjustment shaft 311 rotates along with the rotation stop mechanism 40 around the first rotation axis, and the adjustment shaft 311 and the adjustment matching shaft 321 do not generate the first relative rotation, so that the circumference of the winding needle cannot be adjusted.

When the control end of the control mechanism 50 moves to the rotation stopping section 314 of the adjusting shaft 311 and is matched with the rotation stopping section 314, the control end of the control mechanism 50 plays a role in stopping rotation of the adjusting shaft 311, namely, the control mechanism 50 and the adjusting shaft 311 are integrated, so that the adjusting shaft 311 cannot rotate around the first rotation axis along with the rotating mechanism 10, and at the moment, the adjusting shaft 311 and the adjusting matching shaft 321 generate the first relative rotation, thereby adjusting the circumference of the winding needle.

That is, when the circumference of the winding needle needs to be adjusted, the control end of the control mechanism 50 is moved to the rotation stopping section 314 and is matched with the rotation stopping section 314 of the adjusting shaft 311; when the circumference of the winding needle does not need to be adjusted, the control end of the control mechanism 50 is controlled to leave the rotation stopping section 314.

Since the first winding needle 22a and the second winding needle 22b rotate at a high speed under the driving of the rotating mechanism 10 when the winding operation is performed, when the control end of the control mechanism 50 is disengaged from the rotation stopping section 314 of the adjusting shaft 311, the adjusting shaft 311 does not keep up with the rotating speed of the rotating mechanism 10 due to the slow response speed, so that the relative rotation between the adjusting shaft 311 and the adjusting matching shaft 321 is easy to be generated, and the circumference of the winding needle is erroneously adjusted. In order to solve the problem of easy misalignment of the circumference of the winding needle, in particular, in the embodiment, the winding needle device further includes a rotation stopping mechanism 40, and the rotation stopping mechanism 40 is connected to the rotation mechanism 10 to rotate together with the rotation mechanism 10 around the first rotation axis. The rotation-stopping mechanism 40 has a rotation-stopping end that mates with the rotation-stopping section 314 to integrate the rotation-stopping mechanism 40 with the adjustment shaft 311 such that the adjustment shaft 311 is able to rotate around the first rotation axis in synchronization with the rotation-stopping mechanism 40 and the rotation mechanism 10.

The control end of the control mechanism 50 mates with the anti-rotation segment 314 and pushes the anti-rotation end away from the anti-rotation segment 314 when controlled to move to the anti-rotation segment 314.

Thus, when the rotation stopping end of the rotation stopping mechanism 40 is matched with the rotation stopping section 314 of the adjusting shaft 311, the control end of the control mechanism 50 is separated from the rotation stopping section 314 of the adjusting shaft 311, and at this time, the rotation stopping mechanism 40 and the adjusting shaft 311 are integrated, so that the adjusting shaft 311 rotates along with the rotation stopping mechanism 40 around the first rotation axis, the adjusting shaft 311 and the adjusting matching shaft 321 do not generate the first relative rotation, and the circumference of the winding needle cannot be adjusted.

When the control end of the control mechanism 50 moves to the rotation stopping section 314 and pushes the rotation stopping end of the rotation stopping mechanism 40 away from the rotation stopping section 314 of the adjusting shaft 311, at this time, the rotation stopping end of the rotation stopping mechanism 40 is out of engagement with the rotation stopping section 314 of the adjusting shaft 311, the control end of the control mechanism 50 is engaged with the rotation stopping section 314 of the adjusting shaft 311, the control mechanism 500 is integrated with the adjusting shaft 311, the adjusting shaft 311 does not rotate around the first rotation axis along with the rotation stopping mechanism 40 and the rotating mechanism 10, at this time, the adjusting matching shaft 321 rotates around the first rotation axis along with the rotating mechanism 10, so that the adjusting shaft 311 and the adjusting matching shaft 321 generate the first relative rotation, and the circumference of the winding needle is adjusted.

That is, when the circumference of the winding needle needs to be adjusted, the control end of the rotation stopping mechanism 40 is controlled to be out of engagement with the adjusting shaft 311; when the circumference of the winding needle is not required to be adjusted, the rotation stopping end of the rotation stopping mechanism 40 is controlled to be matched with the adjusting shaft 311.

In the embodiment, the control mechanism 50 includes a fixed base 51, a driving block 52, and a second plunger 53. The driving block 52 is controllably movably connected to the fixed base 51 along the first direction as the control end. The driving block 52 has a rotation stopping hole, and the second plunger 53 is disposed on the driving block 52 and extends into the rotation stopping hole at least partially along the radial direction of the rotation stopping hole. The driving block 52 can move to the rotation stopping section 314 of the adjusting shaft 311 in the moving process of the driving block 52 along the first direction, and pushes the rotation stopping end of the rotation stopping mechanism 40 away from the rotation stopping section 314, at this time, the part of the second plunger 53 located in the rotation stopping hole enters the rotation stopping groove 3141, so that the adjusting shaft 311 and the driving block 52 are ensured to be relatively fixed, and the adjusting shaft 311 is prevented from rotating along with the rotating mechanism 10.

Further, the rotation stopping groove 3141 extends lengthwise in the axial direction of the adjustment shaft 311 so that the second plunger 53 can smoothly enter or exit the rotation stopping groove 3141 when the driving block 52 moves in the axial direction of the adjustment shaft 311. Alternatively, the second plunger 53 may be a ball plunger, and the structure and assembly of the ball plunger may be implemented by using a relatively mature prior art, which is not described herein.

Further, the control mechanism 50 further includes a control driving member 54, a first guide rod 56 and a driving plate 55, the fixing seat 51 has a guide hole, the first guide rod 56 is slidably matched with the guide hole, the driving block 52 is fixedly connected to one end of the first guide rod 56 facing the adjusting shaft 311, and the driving plate 55 is fixedly connected to one end of the first guide rod 56 facing away from the adjusting shaft 311. The control driving member 54 is mounted on the fixed seat 51 and is in driving connection with the driving plate 55 to drive the driving plate 55, the first guide rod 56 and the driving block 52 to move along the first direction. Alternatively, the control actuator 54 may employ a pneumatic cylinder.

It should be noted that, the control mechanism 50 is not limited to the engagement of the plunger with the rotation stop groove 3141 to achieve the engagement or disengagement with the adjustment shaft 311, and in other embodiments, the control mechanism 50 may be implemented by clamping, clasping, or the like the adjustment shaft 311, which is not limited herein.

In particular embodiments, the anti-rotation mechanism 40 includes an end cap 41, an anti-rotation block 42, and a first plunger 43. The end cap 41 is mounted to the rotary mechanism 10 to follow the rotary mechanism 10 for synchronous rotation about the first axis of rotation. The rotation stop block 42 is provided to the end cover 41 and serves as the rotation stop end. The rotation stop block 42 has a through hole, and the first plunger 43 is disposed on the rotation stop block 42 and extends into the through hole at least partially along a radial direction of the through hole. The adjusting shaft 311 is rotatably connected to the end cap 41, and a rotation stopping section 314 of the adjusting shaft 311 is disposed through the through hole. The rotation stopping section 314 of the adjusting shaft 311 is provided with a rotation stopping groove 3141, and the part of the first plunger 43 located in the through hole extends into the rotation stopping groove 3141, so that the adjusting shaft 311 is prevented from rotating relative to the rotation stopping block 42, and at this moment, the rotating mechanism 10 can drive the adjusting shaft 311 to rotate together around the first rotating axis, so that the circumference of the winding needle is stopped from being adjusted. When the rotation stopping block 42 is pushed away from the rotation stopping section 314 by the driving block 52, the second plunger 53 on the driving block 52 enters the rotation stopping groove 3141, so that the driving block 52 and the adjusting shaft 311 form a whole, at this time, the adjusting shaft 311 cannot rotate together with the rotation stopping block 42, and the rotating mechanism 10 can only drive the adjusting matching shaft 321 to rotate, so that the first relative rotation is generated between the adjusting shaft 311 and the adjusting matching shaft 321, and the circumference of the winding needle is adjusted.

Further, the rotation stopping groove 3141 extends lengthwise in the axial direction of the adjustment shaft 311 so that the first plunger 43 can smoothly enter or exit the rotation stopping groove 3141 when the rotation stopping block 42 moves in the axial direction of the adjustment shaft 311. Alternatively, the first plunger 43 may be a ball plunger, and the structure and assembly of the ball plunger may be a more mature prior art, so that the description thereof will be omitted herein.

Further, the rotation stopping mechanism 40 further includes a second guide rod 44 and a fourth elastic member 45, the end cover 41 has a guide hole, the second guide rod 44 is slidably matched with the guide hole of the end cover 41, and one end of the second guide rod 44 is fixedly connected with the rotation stopping block 42. The fourth elastic member 45 is sleeved on the second guide rod 44, and opposite ends of the fourth elastic member 45 respectively abut against the end cover 41 and the rotation stopping block 42, so as to provide a pre-tightening force for moving the rotation stopping block 42 along the adjusting shaft 311 toward the rotation stopping section 314 of the adjusting shaft 311. Thus, when the driving block 52 leaves the rotation stopping section 314 of the adjusting shaft 311, the rotation stopping block 42 can move to the rotation stopping section 314 to reset under the elastic force of the fourth elastic member 45. Alternatively, the fourth elastic member 45 may employ a spring.

It should be noted that, the rotation stopping mechanism 40 is not limited to the engagement of the plunger with the rotation stopping groove 3141 to achieve the engagement or disengagement with the adjustment shaft 311, and in other embodiments, the rotation stopping mechanism 40 may be implemented by clamping, clasping, or the like the adjustment shaft 311, which is not limited herein.

Referring to fig. 1 to 4, in an embodiment of the invention, a rotation mechanism 10 includes a rotation sleeve 11, a first sliding sleeve 12, a second sliding sleeve 13 and a rotation frame 14. The rotating sleeve 11 is controllable to rotate around a first rotation axis, and the first sliding sleeve 12 is sleeved in the rotating sleeve 11 in a synchronous rotating manner with the rotating sleeve 11 and is controlled to move along a first direction relative to the rotating sleeve 11. The second sliding sleeve 13 is rotationally sleeved in the first sliding sleeve 12 synchronously with the first sliding sleeve 12, and is controlled to move along a first direction relative to the first sliding sleeve 12. The rotating frame 14 is located within the second sliding sleeve 13 and is connected to the first sliding sleeve 12 such that the rotating frame 14 is capable of rotating with the first sliding sleeve 12 about the first rotational axis and moving with the first sliding sleeve 12 in the first direction.

The winding needle holder includes a first winding needle holder 21a and a second winding needle holder 21b, the first winding needle holder 21a being connected to the rotating frame 14 such that the first winding needle holder 21a rotates together with the rotating frame 14 about a first rotation axis and moves in a first direction. The second winding needle seat 21b is connected with the second sliding sleeve 13, and the first winding needle 22a and the second winding needle 22b are respectively arranged on the side surfaces of the first winding needle seat 21a and the second winding needle seat 21b, which are away from each other. The first winding needle 22a is movable relative to the first winding needle seat 21a in a direction approaching or moving away from the second winding needle 22b, and the first driving member 23a is movably connected to the first winding needle seat 21a in the first direction.

The adjusting member 31 is disposed in the second sliding sleeve 13 and is controlled to rotate synchronously with the rotating frame 14 or stop rotating. The adjustment fitting 32 is mounted to the rotating frame 14 for rotation with the rotating frame 14 about a first axis of rotation and movement in a first direction. The moving member 34 is movably connected to the rotating frame 14 along a first direction, so that the moving member 34 can rotate along with the rotating frame 14 around a first rotation axis and move along the first direction, and can also move along the first direction relative to the rotating frame 14 under the driving of the threaded sleeve 33 so as to adjust the circumference of the winding needle. It is understood that the rotary sleeve 11, the first sliding sleeve 12 and the second sliding sleeve 13 are coaxially disposed, and the axes of the rotary sleeve 11, the first sliding sleeve 12 and the second sliding sleeve 13 are the first rotation axes.

Thus, when the first winding needle 22a needs to perform the needle drawing or inserting operation, the first sliding sleeve 12 is controlled to move along the first direction relative to the rotating sleeve 11, so as to drive the rotating frame 14 to move along the first direction, and the rotating frame 14 drives the first winding needle seat 21a and the first winding needle 22a to move along the first direction, that is, the first winding needle 22a performs the needle drawing and inserting operation.

When the second winding needle 22b needs to perform the needle drawing or inserting action, the second sliding sleeve 13 is controlled to move along the first direction relative to the first sliding sleeve 12 and the rotating sleeve 11, so as to drive the second winding needle seat 21b to move along the first direction, and the second winding needle seat 21b drives the second winding needle 22b to move along the first direction, namely, the second winding needle 22b performs the needle drawing and inserting action.

When the circumference of the winding needle needs to be adjusted, the adjusting member 31 is controlled to stop rotating along with the rotating frame 14, the rotating sleeve 11 rotates around the first rotating axis, so as to drive the first sliding sleeve 12, the second sliding sleeve 13 and the rotating frame 14 to rotate around the first rotating axis, so that the first relative rotation is generated between the adjusting member 31 and the adjusting matching member 32, and the moving member 34 is driven to move along the first direction, and the first winding needle 22a is driven to move close to or far away from the second winding needle 22b under the action of the first driving member 23a and the first driving matching member 24a, so that the circumference adjustment of the winding needle is realized.

When the circumference of the winding needle is adjusted in place and winding work is required, the adjusting member 31 is controlled to synchronously rotate along with the rotating frame 14, so that the first relative rotation is not generated between the adjusting member 31 and the adjusting matching member 32, and the circumference of the winding needle is stopped. At this time, the rotary sleeve 11 rotates around the first rotation axis, so as to drive the first sliding sleeve 12, the second sliding sleeve 13 and the rotary frame 14 to rotate around the first rotation axis, and further drive the first winding needle 22a on the first winding needle seat 21a and the second winding needle 22b on the second winding needle seat 21b to rotate around the first rotation axis, so that the material is wound on the outer contour formed by splicing the first winding needle 22a and the second winding needle 22b, and a battery cell is formed.

In the process of winding the battery cell, the sequence of the steps of drawing and inserting the first winding needle 22a and the second winding needle 22b, the winding step, the step of adjusting the circumference of the winding needle, and the like may be the existing process flow, which is not limited herein.

Alternatively, the adjustment fitting 32 is an adjustment fitting shaft 321, and both ends of the adjustment fitting shaft 321 are fitted to the rotating frame 14 through bearings, so that the adjustment fitting shaft 321 can be rotatable about the second rotation axis relative to the rotating frame 14.

In the embodiment, the first sliding sleeve 12 is provided with a guide groove extending longitudinally along the first direction, and the rotating sleeve 11 is fixedly connected with a guide block 111, and the guide block 111 is in sliding fit with the guide groove. In this way, the sliding fit of the guide block 111 and the guide groove is used to guide the movement of the first sliding sleeve 12 relative to the rotating sleeve 11 along the first direction, and the guide groove may also be used to limit the guide block 111 in the circumferential direction of the first sliding sleeve 12, so that the first sliding sleeve 12 and the rotating sleeve 11 rotate synchronously around the first rotation axis.

In particular, in the embodiment, the second sliding sleeve 13 and the first sliding sleeve 12 are connected by a key, so that the second sliding sleeve 13 and the first sliding sleeve 12 synchronously rotate around the first rotation axis, and the second sliding sleeve 13 can move a certain distance along the first direction relative to the first sliding sleeve 12. More specifically, the outer side of the second sliding sleeve 13 is fixedly connected with a key 131, the inner side of the first sliding sleeve 12 is provided with a key slot extending along the axial direction (i.e. the first direction), the key 131 is slidably matched in the key slot, so that synchronous rotation of the second sliding sleeve 13 and the first sliding sleeve 12 around the first rotation axis is realized, and the second sliding sleeve 13 can move a certain distance along the first direction relative to the first sliding sleeve 12. Further, the key groove may be the guide groove, that is, only one through groove is formed on the first sliding sleeve 12, and the key 131 and the guide block 111 are slidably engaged in the through groove, which is beneficial to simplifying the processing process of the key groove and the guide groove. Of course, in another embodiment, the key groove and the guide groove are machined separately, i.e. two through grooves are formed on the first sliding sleeve 12, the key 131 is slidably fitted in one of the through grooves (i.e. the key groove), and the guide block 111 is slidably fitted in the other of the through grooves (i.e. the guide groove).

In the embodiment, the rotating mechanism 10 further includes a first driving block 121 rotatably sleeved on the outer side of the first sliding sleeve 12 around the first rotation axis, where the first driving block 121 may be matched with the external toggle mechanism, so that the first sliding sleeve 12 is driven to move along the first direction relative to the rotating sleeve 11 under the toggle of the external toggle mechanism, so as to complete the needle drawing and inserting actions of the first winding needle 22 a. Alternatively, the first driving block 121 may be fitted to the outside of the first sliding sleeve 12 through a bearing.

In the embodiment, the rotating mechanism 10 further includes a second driving block 131 rotatably sleeved on the outer side of the second sliding sleeve 13 around the first rotation axis, where the second driving block 131 can be matched with the external toggle mechanism, so that the second sliding sleeve 13 is driven to move along the first direction relative to the rotating sleeve 11 under the toggle of the external toggle mechanism, so as to complete the needle drawing and inserting actions of the second winding needle 22 b. Alternatively, the second driving block 131 may be bearing-fitted to the outside of the second sliding sleeve 13.

Further, a first positioning block 112 corresponding to the first driving block 121 is mounted on the outer side of the rotating sleeve 11, and a first magnetic attraction piece 1121 is mounted on the first positioning block 112, and the first magnetic attraction piece 1121 is used for adsorbing and fixing the first driving block 121 when the first winding needle 22a is inserted in place. The outer side of the first sliding sleeve 12 is also provided with a second positioning block 122 corresponding to the second driving block 131, the second positioning block 122 is provided with a second magnetic attraction piece 1221, and the second magnetic attraction piece 1221 is used for adsorbing and fixing the second driving block 131 when the second winding needle 22b is inserted in place. Thus, after the first winding needle 22a and the second winding needle 22b are inserted in place, the first magnetic attraction piece 1121 adsorbs and fixes the first driving block 121, and the second magnetic attraction piece 1221 adsorbs and fixes the second driving block 131, so that the rotating sleeve 11, the first sliding sleeve 12 and the second sliding sleeve 13 remain relatively fixed, and a relative movement along the first direction between the rotating sleeve 11, the first sliding sleeve 12 and the second sliding sleeve 13 is avoided during the winding operation, so that the first winding needle 22a or the second winding needle 22b moves along the first direction during the winding process. Alternatively, the first magnetic attraction 1121 and the second magnetic attraction 1221 may employ magnets or electromagnets.

Further, the first positioning block 112 is further provided with a buffer 1122 corresponding to the first driving block 121, and in the process that the first driving block 121 drives the first sliding sleeve 12 to move along the first direction, the buffer 1122 can contact with the first driving block 121 and buffer the first driving block 121, so that hard impact on the rotating sleeve 11 is avoided when the first positioning block 112 and the second positioning block 122 are shifted to move along the first direction, and vibration is reduced.

In some embodiments, at least one of the first driving member 23a and the first driving mating member 24a has a first inclined surface 231a slidingly engaged with the other, and the first inclined surface 231a is inclined with respect to the first rotation axis, so that when the first driving member 23a moves in the first direction with respect to the first driving mating member 24a, the first driving mating member 24a can drive the first winding needle 22a to move in a direction away from the second winding needle 22b, thereby achieving the purpose of increasing the circumference of the winding needle. Preferably, the first driving member 23a and the first driving mating member 24a have first inclined surfaces 231a, and the two first inclined surfaces 231a are mutually fitted, so as to improve flexibility and stability of relative sliding of the first driving member 23a and the first driving mating member 24a along the first inclined surfaces 231a, and facilitate flexibility and stability of adjusting circumference of the winding needle.

In the embodiment, the needle winding mechanism 20 further includes a first limiting member 25a and a first elastic member 26a, where the first limiting member 25a includes a first rod portion 251a and a first head portion 252a connected to one end of the first rod portion 251 a. The first rod 251a is disposed through the first winding needle 22a and connected to the first winding needle seat 21a, and the first head 252a is disposed on a side of the first winding needle 22a facing away from the second winding needle 22 b. Opposite ends of the first elastic member 26a are respectively abutted against the first head 252a and the first winding needle 22a, so as to provide a pre-tightening force for moving the first winding needle 22a along the first rod 251a near the second winding needle 22 b. Thus, when the moving member 34 drives the first driving member 23a to move forward in the first direction (i.e. move upward in the embodiment shown in fig. 3), the first driving member 23a pushes the first driving mating member 24a and the first winding needle 22a to move away from the second winding needle 22b through the first inclined surface 231a (at this time, the first elastic member 26a is compressed), so as to enlarge the circumference of the winding needle. When the moving member 34 drives the first driving member 23a to move reversely in the first direction (i.e. move downwards in the embodiment shown in fig. 3), the first driving member 23a releases the pushing of the first driving engagement member 24a, and the first driving engagement member 24a moves towards the first driving member 23a under the action of the elastic force of the first elastic member 26a, so that the first driving engagement member 24a and the first driving member 23a always keep in contact, and meanwhile, the first driving engagement member 24a drives the first winding needle 22a to move towards the direction approaching to the second winding needle 22b, so as to realize the reduction of the circumference of the winding needle. Alternatively, the first elastic member 26a may employ a spring.

Further, the first rod portion 251a of the first limiting member 25a may be screwed with the first winding needle seat 21 a. In this way, the movement range of the first winding needle 22a relative to the second winding needle 22b can be controlled by screwing the first limiting piece 25a, namely, the adjustment range of the circumference of the winding needle is controlled. Alternatively, the first stopper 25a may employ a stopper screw.

In the embodiment, the needle winding mechanism 20 further includes a first guide sleeve and a first guide post 27a, the first guide sleeve is mounted on the first needle winding seat 21a, one end of the first guide post 27a is fixedly connected to the first needle winding seat 22a, and the other end of the first guide post 27a is slidably fit in the first guide sleeve. In this way, the first guide post 27a and the first guide sleeve are utilized to guide the movement of the first winding needle 22a relative to the first winding needle seat 21a, which is beneficial to improving the adjustment stability and the adjustment precision of the perimeter of the winding needle.

In some embodiments, the second winding needle 22b is movably connected to the second winding needle seat 21b in a direction approaching or moving away from the first winding needle 22 a. The winding needle mechanism 20 further comprises a second driving member 23a movably connected to the second winding needle seat 21b in the first direction, and a second driving mating member 24a connected to the second winding needle 22 b. The second actuating member 23a is capable of following the moving member 34 in the first direction. The second driving engagement member 24a engages with the second driving member 23a and moves the second winding needle 22b toward or away from the first winding needle 22a in response to the movement of the second driving member 23a in the first direction. In this way, the moving member 34 can simultaneously drive the first driving member 23a and the second driving member 23a to synchronously move along the first direction, and then the first winding needle 22a and the second winding needle 22b are respectively driven by the first driving matching member 24a and the second driving matching member 24a to approach or separate from each other, so as to realize the perimeter adjustment of the winding needle, thereby being beneficial to improving the perimeter adjustment range of the winding needle, and enabling the first winding needle 22a and the second winding needle 22b to be always symmetrically distributed.

In particular to the embodiment, at least one of the second driving piece 23a and the second driving mating piece 24a has the second inclined surface 231b slidingly mated with the other one thereof. The second inclined surface 231b is inclined relative to the first rotation axis, so that when the second driving member 23a moves relative to the second driving mating member 24a along the first direction, the second driving mating member 24a can be driven to drive the second winding needle 22b to move towards a direction away from the first winding needle 22a, thereby achieving the purpose of increasing the circumference of the winding needle. Preferably, the second driving member 23a and the second driving mating member 24a have second inclined surfaces 231b, and the two second inclined surfaces 231b are mutually fitted, so as to improve flexibility and stability of relative sliding of the second driving member 23a and the second driving mating member 24a along the second inclined surfaces 231b, and facilitate flexibility and stability of adjusting the circumference of the winding needle.

In the embodiment, the needle winding mechanism 20 further includes a second limiting member 25b and a second elastic member 26b, where the second limiting member 25b includes a second rod portion 251b and a second head portion 252b connected to one end of the second rod portion 251 b. The second rod portion 251b is disposed through the second winding needle 22b and connected to the second winding needle seat 21b, and the second head 252b is disposed on a side of the second winding needle 22b facing away from the first winding needle 22 a. Opposite ends of the second elastic member 26b are respectively abutted against the second head 252b and the second winding needle 22b, so as to provide a pre-tightening force for moving the second winding needle 22b along the second rod 251b near the first winding needle 22 a. Thus, when the moving member 34 drives the second driving member 23a to move forward in the first direction (i.e. move upward in the embodiment shown in fig. 3), the second driving member 23a pushes the second driving mating member 24a and the second winding needle 22b to move away from the first winding needle 22a through the second inclined surface 231b (at this time, the second elastic member 26b is compressed), so as to enlarge the circumference of the winding needle. When the moving member 34 drives the second driving member 23a to move reversely in the first direction (i.e. move downwards in the embodiment shown in fig. 3), the second driving member 23a releases the pushing of the second driving engagement member 24a, and the second driving engagement member 24a moves towards the second driving member 23a under the action of the elastic force of the second elastic member 26b, so that the second driving engagement member 24a and the second driving member 23a always keep in contact, and meanwhile, the second driving engagement member 24a drives the second winding needle 22b to move towards the direction approaching to the first winding needle 22a, so as to realize the reduction of the circumference of the winding needle. Alternatively, the second elastic member 26b may employ a spring.

Further, the second rod portion 251b of the second limiting member 25b may be screwed with the second winding needle seat 21 b. In this way, the movement range of the second winding needle 22b relative to the first winding needle 22a, that is, the adjustment range of the circumference of the winding needle can be controlled by screwing the second limiting piece 25 b. Alternatively, the second stopper 25b may employ a stopper screw.

In particular embodiments, the needle winding mechanism 20 further includes a push block 28a and a linkage push block 28b. The push block 28a is movably connected to the first needle holder 21a along the first direction, one end of the push block 28a is connected to the moving member 34, and the other end of the push block 28a is connected to the first driving member 23a, so that the moving member 34 drives the first driving member 23a to move along the first direction through the push block 28 a. The linkage push block 28b is movably connected to the second needle holder 21b along the first direction, and is at least partially located on a moving path of the push block 28a along the first direction, so that the push block 28a can drive the linkage push block 28b to move along the first direction when moving along the first direction. Specifically in the embodiment shown in fig. 5, the linkage pusher 28b is located on the upper side of the pusher 28 a.

Thus, when the moving member 34 drives the push block 28a to move forward in the first direction (i.e. move upward in the embodiment shown in fig. 5), the push block 28a drives the linkage push block 28b to move forward in the first direction synchronously, so that the push block 28a and the linkage push block 28b drive the first driving member 23a and the second driving member 23a to move forward in the first direction respectively, and push the first winding needle 22a on the first driving mating member 24a and the second winding needle 22b on the second driving mating member 24a to move away from each other (at this time, compress the first elastic member 26a and the second elastic member 26 b) respectively through the first inclined surface 231a and the second inclined surface 231b, thereby realizing the circumferential length adjustment of the winding needles.

When the moving member 34 drives the push block 28a to move reversely in the first direction (i.e., move downward in the embodiment shown in fig. 5), the push block 28a is separated from the linkage push block 28b, so as to provide a moving space for the linkage push block 28b to move reversely in the first direction, the second driving mating member 24a presses the second driving member 23a to move under the elastic force of the second elastic member 26b, and the second driving member 23a and the linkage push block 28b are pushed to move reversely in the first direction under the action of the second inclined surface 231b, at this time, the second winding needle 22b moves along the second driving mating member 24a towards the direction approaching the first winding needle 22 a. Meanwhile, the push block 28a drives the first driving member 23a to move reversely in the first direction, so that the first driving member 23a releases the pushing of the first driving mating member 24a, and the first driving mating member 24a moves towards the first driving member 23a under the elastic force of the first elastic member 26a, so that the first winding needle 22a always keeps in contact with the first driving member 23a, and simultaneously, moves along with the first driving mating member 24a towards a direction approaching to the second winding needle 22 b. That is, both the first winding needle 22a and the second winding needle 22b are moved toward each other, enabling the circumference of the winding needle to be reduced.

It will be appreciated that the reciprocating movement of the push block 28a and the first driving member 23a relative to the first needle hub 21a along the first direction may be implemented by forming a chute in the first needle hub 21a, which is not limited herein. The reciprocating movement of the linkage push block 28b and the second driving member 23a relative to the second needle holder 21b along the first direction may be achieved by providing a sliding slot in the second needle holder 21b, which is not limited herein.

In the embodiment, the needle winding mechanism 20 further includes a second guide sleeve and a second guide post 27b, the second guide sleeve is mounted on the second needle winding seat 21b, one end of the second guide post 27b is fixedly connected to the second needle winding seat 22b, and the other end of the second guide post 27b is slidably fit in the second guide sleeve. In this way, the second guide post 27b and the second guide sleeve are utilized to guide the movement of the second winding needle 22b relative to the second winding needle seat 21b, which is beneficial to improving the adjustment stability and the adjustment precision of the perimeter of the winding needle.

Referring to fig. 2 and 4, in some embodiments, the rotation mechanism 10 further includes a swing assembly 15, and the swing assembly 15 includes a mounting base 151, a swing member 152, and a third elastic member 153. The mounting 151 is coupled to the second slide 13 for rotation about the first axis of rotation and movement in the first direction in synchronization with the second slide 13. One end of the swinging member 152 is rotatably connected to the mounting base 151 about a third rotation axis intersecting the first rotation axis, and the other end of the swinging member 152 is connected to the second reel seat 21b so that the second reel seat 21b swings with the swinging member 152 about the third rotation axis. At this time, the second hub 21b is indirectly connected to the second slide bush 13 through the swinging member 152 and the mount 151. The third elastic member 153 is abutted between the swinging member 152 and the mounting seat 151, and is used for providing a pre-tightening force for enabling the swinging member 152 to drive the second winding needle 22b to swing around the third rotation axis towards the direction approaching the first winding needle 22 a. In this way, when the winding needle tail seat is utilized to position the end of the winding needle mechanism 20 away from the rotating mechanism 10, the first winding needle 22a and the second winding needle 22b can be slightly spread to be away from the end of the rotating mechanism 10 (the third elastic member 153 is compressed at the moment), so that when the battery core is required to be fed after the winding of the battery core is completed, the winding needle tail seat is separated from the winding needle mechanism 20, the end of the second winding needle 22b, which is away from the rotating mechanism 10, swings towards the first winding needle 22a under the action of the elastic force of the third elastic member 153, so that the circumference of the winding needle is slightly reduced, the first winding needle 22a and the second winding needle 22b are facilitated to perform the needle drawing action, and the problems of carrying out, wrinkling and the like of the inner-layer membrane of the battery core are prevented. It should be noted that the tail seat of the winding needle can adopt a mature prior art, so that the description is omitted here.

In the embodiment, the swinging member 152 is assembled on the mounting base 151 through the swinging shaft 154, and the axis of the swinging shaft 154 is the third rotation axis. The third elastic member 153 is located at a position between the pendulum shaft 154 and the second winding hub 21 b. Alternatively, the third elastic member 153 may employ a spring. The third axis of rotation is perpendicular to the first axis of rotation.

Of course, the wobble assembly 15 is not required, and in other embodiments, the wobble assembly 15 may not be provided and the second hub 21b may be directly coupled to the second runner 13.

In the embodiment, the end cover 41 is fixedly installed at one end of the second sliding sleeve 13 away from the needle winding mechanism 20, one end of the adjusting shaft 311 is assembled on the mounting seat 151 through a bearing, and the other end of the adjusting shaft 311 is assembled on the end cover 41 through a bearing and penetrates out to one side of the end cover 41 away from the needle winding mechanism 20. The rotation stop section 314 of the adjustment shaft 311 is located at the end that protrudes out to the side of the end cap 41 remote from the winding needle mechanism 20 to facilitate mating with the control mechanism 50.

Based on the winding needle device, the invention further provides winding equipment comprising the winding needle device in any embodiment. Specifically, the winding equipment further comprises a turret, the winding needle device is arranged on the turret, and the turret is used for driving the winding needle device to sequentially rotate to a winding station for winding the formed battery cell, a rubberizing station for rubberizing the battery cell and a blanking station for blanking the battery cell. It should be noted that the specific structure of the turret may be a mature technology, so that the description is omitted here.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A needle winding device, comprising:

A rotation mechanism controllably rotatable about a first axis of rotation;

2. The needle winding device according to claim 1, wherein the adjusting mechanism comprises an adjusting member, an adjusting mating member and a moving member, the adjusting member is coupled with the rotating mechanism and is controlled to synchronously rotate or stop rotating along with the rotating mechanism, the adjusting mating member is mounted on the rotating mechanism and is in transmission connection with the adjusting member, the moving member is movably connected with the rotating mechanism along the first direction and is in transmission connection with the adjusting mating member, and the first driving member is connected with the moving member;

3. The needle roller device of claim 2, wherein the adjustment member is an adjustment shaft, the axis of the adjustment shaft being collinear with the first axis of rotation, the adjustment fitting member being an adjustment fitting shaft rotatably connected to the rotation mechanism about a second axis of rotation parallel to the first axis of rotation, the adjustment shaft being drivingly connected to the adjustment fitting shaft;

4. The needle roller assembly of claim 3, wherein the adjustment mechanism further comprises a drive gear mounted to the adjustment shaft and a driven gear mounted to the adjustment mating shaft and engaged with the drive gear.

5. A needle roller assembly according to claim 3, wherein one end of the adjustment shaft is rotatably connected to the rotation mechanism about the first rotation axis, and the other end of the adjustment shaft extends out of the rotation mechanism and has a rotation stop section;

6. The needle winding device of claim 5, further comprising a rotation stopping mechanism coupled to the rotation mechanism and having a rotation stopping end, the rotation stopping end of the rotation stopping mechanism being coupled with the rotation stopping segment;

7. The needle winding device according to claim 6, wherein the rotation stopping mechanism comprises an end cover, a rotation stopping block and a first plunger, the end cover is mounted on the rotating mechanism, the rotation stopping block is arranged on the end cover and serves as the rotation stopping end, the rotation stopping block is provided with a through hole, the first plunger is arranged on the rotation stopping block and extends into the through hole at least partially along the radial direction of the through hole, the adjusting shaft is rotatably connected to the end cover, and the rotation stopping section of the adjusting shaft penetrates through the through hole;

8. The needle rolling device according to claim 2, wherein the rotating mechanism comprises a rotating sleeve, a first sliding sleeve, a second sliding sleeve and a rotating frame, the rotating sleeve can rotate around the first rotating axis in a controlled manner, the first sliding sleeve is sleeved in the rotating sleeve in a synchronous rotating manner with the rotating sleeve and moves in a controlled manner along the first direction relative to the rotating sleeve, the second sliding sleeve is sleeved in the first sliding sleeve in a synchronous rotating manner with the first sliding sleeve and moves in a controlled manner along the first direction relative to the first sliding sleeve, and the rotating frame is positioned in the second sliding sleeve and connected with the first sliding sleeve;

9. The needle roller assembly of claim 8, wherein at least one of the first actuating member and the first actuating member has a first inclined surface slidably engaged with the other, the first inclined surface being disposed obliquely with respect to the first axis of rotation, the first actuating member being urged to move the first needle in a direction away from the second needle roller upon movement of the first actuating member in the first direction with respect to the first actuating member.

10. The needle winding device according to claim 9, wherein the needle winding mechanism further comprises a first limiting member and a first elastic member, the first limiting member comprises a first rod portion and a first head portion connected to one end of the first rod portion, the first rod portion penetrates through the first needle winding seat and is connected with the first needle winding seat, and the first head portion is located on one side, away from the second needle winding seat, of the first needle winding seat;

11. The needle winding device of claim 8, wherein the second needle winding device is movably connected to the second needle winding hub in a direction toward or away from the first needle winding device;

The winding needle mechanism further comprises a second driving part movably connected to the second winding needle seat along the first direction and a second driving matching part connected to the second winding needle, the second driving part can move along the first direction along the moving part, the second driving matching part is matched with the second driving part, and the second winding needle is driven to approach or depart from the first winding needle in response to the movement of the second driving part along the first direction.

12. The needle roller assembly of claim 11, wherein at least one of the second actuating member and the second actuating member has a second inclined surface slidably engaged with the other, the second inclined surface being disposed obliquely with respect to the first axis of rotation, the second actuating member being urged to move the second actuating member away from the first needle roller as the second actuating member moves along the first axis of rotation with respect to the second actuating member.

13. The needle rolling device according to claim 12, wherein the needle rolling mechanism further comprises a second limiting member and a second elastic member, the second limiting member comprises a second rod portion and a second head portion connected to one end of the second rod portion, the second rod portion penetrates through the second needle rolling seat and is connected with the second needle rolling seat, and the second head portion is located on one side, away from the first needle rolling seat, of the second needle rolling seat;

14. The needle roller assembly of claim 8, wherein the rotation mechanism further comprises a swing assembly comprising a mount, a swing member, and a third elastic member;

the mounting seat is connected with the second sliding sleeve, one end of the swinging piece is rotatably connected with the mounting seat around a third rotation axis intersecting with the first rotation axis, and the other end of the swinging piece is connected with the second needle rolling seat; the third elastic piece is abutted between the swinging piece and the mounting seat and is used for providing pretightening force for enabling the swinging piece to drive the second winding needle to swing around the third rotation axis towards the direction close to the first winding needle.

15. Winding device, characterized in that it comprises a winding needle device according to any one of claims 1 to 14.