CN219180566U - Winding needle device and battery core winding equipment - Google Patents

Abstract

The utility model provides a winding needle device and an electric core winding device, wherein the winding needle device comprises: the winding piece can rotate around the axis of the winding piece, the outer surface of the winding piece is provided with a concave groove which is concave inwards, and the concave groove is provided with a stopping surface; the movable piece is movably arranged in the groove between a first position and a second position, the first side of the movable piece is spaced from the abutting surface when the movable piece is in the first position, and the first side of the movable piece is abutted against the abutting surface when the movable piece is in the second position; the driving assembly is connected with the movable piece to drive the movable piece to move between a first position and a second position. According to the winding needle device, the to-be-wound piece is abutted against the groove of the winding piece through the movable piece and then the battery cell is wound, so that the yield of battery cell winding can be improved, and the inner ring of the battery cell is prevented from collapsing after the battery cell is removed from the winding piece, and the performance of the battery cell is prevented from being influenced.

Description

Winding needle device and battery core winding equipment

Technical Field

The utility model relates to the technical field of battery cell manufacturing, in particular to a winding needle device and battery cell winding equipment comprising the winding needle device.

Background

In the process of winding the battery cell by the winding needle, the end part of the diaphragm needs to be clamped first. In the prior art, the clamping of the end of the diaphragm is usually achieved by two inner clamping needles arranged in the winding needle, and during the clamping process, the diaphragm needs to pass through a center seam between the two inner clamping needles. However, when the inner clamping needle is used for clamping the diaphragm of the battery cell with large circumference, the diaphragm of the inner ring of the battery cell is easy to collapse after the battery cell is stripped due to the large diameter of the inner ring of the battery cell, and the performance of the battery cell is affected.

Disclosure of Invention

The utility model aims to provide a novel technical scheme of a winding needle device, which at least can solve the problem that a diaphragm of an inner ring of a battery cell in the prior art is easy to collapse.

It is still another object of the present utility model to provide a cell winding apparatus including the above winding needle device.

According to a first aspect of the present utility model there is provided a needle roller arrangement comprising: the winding piece can rotate around the axis of the winding piece, the outer surface of the winding piece is provided with an inwards concave groove, and the groove is provided with a stopping surface; the movable piece is movably arranged in the groove between a first position and a second position, the first side of the movable piece is spaced from the abutting surface when the movable piece is in the first position, and the first side of the movable piece is abutted against the abutting surface when the movable piece is in the second position; the driving assembly is connected with the movable piece to drive the movable piece to move between the first position and the second position.

Optionally, the groove is formed as an elongated groove extending in the axial direction of the winding member, and the abutment surface extends in the axial direction of the winding member.

Optionally, the groove further has an abutment surface disposed opposite to the abutment surface and spaced apart along a circumferential direction of the winding member, the movable member is movable between the abutment surface and the abutment surface, a first side of the movable member faces the abutment surface, and a second side of the movable member faces the abutment surface.

Optionally, the driving assembly includes: the push rod is movably arranged in the winding piece along the axial direction of the winding piece; the driving piece is matched with the push rod to drive the push rod to move along the axial direction of the winding piece; the push block is connected with the push rod and moves synchronously with the push rod, and is provided with an inclined surface which extends obliquely relative to the axial direction of the winding piece; the driving roller is rotatably arranged on the movable piece, the outer peripheral surface of the driving roller is abutted to the inclined surface, and the pushing block is matched with the driving roller to drive the movable piece.

Optionally, the groove further has an abutment surface opposite to the abutment surface, and the driving assembly further includes: the first elastic piece is arranged between the second side of the movable piece and the abutting surface, the first end of the first elastic piece is connected with the second side of the movable piece, the second end of the first elastic piece is connected with the abutting surface, and under the condition that the movable piece is in the second position, the first elastic piece extrudes the movable piece to press the movable piece to the abutting surface.

Optionally, the abutment surface is provided with a guide hole, and the winding needle device further includes: the guide piece, the one end of guide piece is located the second side of moving part, the guide piece is followed the axial of guiding hole is movably located the guiding hole.

Optionally, the movable member includes: a connecting portion formed as an elongated block extending in an axial direction of the winding member, the connecting portion being connected with the driving assembly; the plurality of stopping parts are arranged on the connecting part at intervals along the axial direction of the winding piece, the stopping parts are spaced from the stopping surfaces when the movable piece is at the first position, and the stopping parts are stopped from the stopping surfaces when the movable piece is at the second position.

Optionally, the first side surface of the connection portion is disposed opposite to the abutment surface, the abutment portion is formed as a projection extending obliquely toward the abutment surface with respect to the first side surface of the connection portion, and an end surface of the projection toward the abutment surface is formed as an arc surface.

Optionally, the winding member includes: the outer surface of the fixed half needle is provided with the groove; the two movable half needles are respectively arranged on two sides of the fixed half needle, the outer surfaces of the two movable half needles are matched with the outer surfaces of the fixed half needles to form a winding surface for winding a piece to be wound, and each movable half needle is respectively movable relative to the fixed half needle to adjust the circumference of the winding surface.

According to a second aspect of the present utility model, there is provided a cell winding apparatus comprising a winding needle device as described in any of the above embodiments.

Optionally, the cell winding device further includes: the pushing component is arranged close to the outer surface of the winding piece and can move to push the piece to be wound into the groove.

Optionally, the pushing assembly includes: the support is movably arranged on the outer side of the winding piece; the two stopping rollers are arranged on the support at intervals along the circumferential direction of the winding piece and are respectively used for stopping the piece to be wound on the outer surface of the winding piece; the movable roller is movably arranged on the support and positioned between the two stop rollers, and is used for pushing the piece to be wound into the groove.

Optionally, the pushing assembly further comprises: the pushing driving piece is arranged on the support; the first end of the mounting seat is provided with the movable roller which can rotate around the axis of the mounting seat, the second end of the mounting seat is rotationally connected with the pushing driving piece, and the pushing driving piece can drive the movable roller on the mounting seat to extend into or withdraw from the groove; the second elastic piece is arranged between the mounting seat and the pushing driving piece, and the second elastic piece extrudes the mounting seat to press the movable roller against the stopping surface under the condition that the movable roller stretches into the groove.

Optionally, the movable piece includes a plurality of stopping portions, the number of the movable roller is a plurality of, a plurality of the movable roller is along the axial interval distribution of coiling piece, and a plurality of the movable roller with a plurality of stopping portions staggered arrangement.

Optionally, the cell winding device further includes: the cutting assembly is arranged on the support and located between the two stop rollers, and the cutting assembly is used for cutting the piece to be wound.

Optionally, the cell winding device further includes: the two protection covers are arranged on two sides of the cutting assembly at intervals, and each protection cover is movably connected with the support respectively so as to be close to or far away from the winding piece.

According to the winding needle device, the groove is formed in the outer surface of the winding piece, and the movable piece arranged in the groove is matched with the stop surface in the groove, so that the end of the piece to be wound can be clamped and loosened, and the winding piece can start to wind the piece to be wound. The movable piece is used for stopping the piece to be wound in the groove of the winding piece and then winding the battery cell, so that the yield of winding the battery cell can be improved, and the inner ring of the battery cell is prevented from collapsing after the battery cell is removed from the winding piece, and the performance of the battery cell is prevented from being influenced.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

FIG. 1 is a schematic illustration of one state of a needle roller arrangement according to one embodiment of the utility model;

FIG. 2 is a schematic illustration of yet another state of a needle roller arrangement according to one embodiment of the utility model;

FIG. 3 is an enlarged view of the encircled portion of FIG. 2 at A;

FIG. 4 is a perspective view of a winding member of the winding needle device according to one embodiment of the present utility model;

FIG. 5 is a front view of a winding member of a winding needle device according to one embodiment of the present utility model;

FIG. 6 is a right side view of a winding member of a winding needle device according to one embodiment of the present utility model;

FIG. 7 is a top view of a winding member of a winding needle device according to one embodiment of the present utility model;

FIG. 8 is a cross-sectional view taken along line B-B of FIG. 7;

FIG. 9 is a perspective view of a portion of the structure of the drive assembly of the needle roller device according to one embodiment of the present utility model;

Fig. 10 is a perspective view of a pushing assembly and a cutting assembly of the cell winding apparatus according to one embodiment of the present utility model;

fig. 11 is a front view of a pushing assembly and a cutting assembly of the cell winding apparatus according to one embodiment of the present utility model;

FIG. 12 is a cross-sectional view taken along line C-C of FIG. 11;

fig. 13 is a left side view of a pushing assembly and a cutting assembly of the cell winding apparatus according to one embodiment of the present utility model;

fig. 14 is a top view of a pushing assembly and cutting assembly of the cell winding apparatus according to one embodiment of the present utility model;

fig. 15 is a perspective view of a partial structure of a pushing assembly of the cell winding apparatus according to an embodiment of the present utility model;

fig. 16 is a perspective view of a cutting assembly and a shield of a cell winding apparatus in accordance with one embodiment of the present utility model.

Reference numerals

A needle winding device 100;

a winding member 10; a groove 11; a stop surface 12; an abutment surface 13; fixing the half needle 15; a movable half needle 16; a guide bar 161; a cam plate 162; cam groove 163; a cam 164; a third elastic member 165; a first winding needle 17; a second winding needle 18;

a movable member 20; a first elastic member 21; a guide 22; a connection portion 23; a stopper 24; an arcuate surface 241;

A push rod 31; a driving member 32; a push block 33; an inclined surface 331; a drive roller 34;

a pushing assembly 40; a support 41; a stopper roller 42; a mounting block 421; a fourth elastic member 423; guide bar 424; a movable roller 43; a mounting seat 431; a rotating shaft 432; a pushing drive 433; a movable end 4331; a second elastic member 434;

a cutting assembly 50; a cutter 51;

a shield 60;

a diaphragm delivery assembly 70; a diaphragm 71;

a pole piece transport assembly 80; a pole piece 81;

a turret 90; a turnover support shaft 91; through stick 92.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

A needle roller device 100 according to an embodiment of the present utility model will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 16, a winding needle device 100 according to an embodiment of the present utility model includes: a winding member 10, a movable member 20 and a driving assembly.

Specifically, the winding member 10 is rotatable about its own axis, the outer surface of the winding member 10 is provided with an inwardly recessed groove 11, the groove 11 has an abutment surface 12, the movable member 20 is movably provided in the groove 11 between a first position, in which the movable member 20 is spaced apart from the abutment surface 12 on a first side of the movable member 20, and a second position, in which the movable member 20 is in which the first side of the movable member 20 abuts against the abutment surface 12, and a driving assembly is connected to the movable member 20 to drive the movable member 20 between the first position and the second position.

In other words, the winding needle device 100 according to the embodiment of the present utility model is mainly composed of the winding member 10, the movable member 20, and the driving assembly. Wherein the winding member 10 can wind the member to be wound by rotating around its own axis. Alternatively, the member to be wound may include the separator 71 and/or the pole piece 81, and the separator 71 and the pole piece 81 may be stacked and wound into a battery cell on the outer surface of the winding member 10. When the winding member 10 winds the separator 71 and the pole piece 81, the separator 71 may be first wound around the outer surface of the winding member 10, and then the pole piece 81 and the separator 71 may be laminated and wound. That is, the innermost ring of the battery cell wound on the winding member 10 may be constituted by the separator 71.

A groove 11 may be provided on the outer surface of the winding member 10, and the groove 11 may be recessed toward the inside of the winding member 10. A part of the inner wall surface of the groove 11 may form the abutment surface 12. In addition, a movable member 20 may be disposed within the recess 11, and the movable member 20 may be movable within the recess 11 between a first position and a second position.

In addition, the moveable member 20 may be coupled to a drive assembly that may be utilized to drive the moveable member 20 between the first position and the second position. Alternatively, the output end of the driving assembly may be connected to the movable member 20, and the input end of the driving assembly may extend out of the winding member 10, so as to control the movement of the movable member 20 from the outside of the winding member 10 through the driving assembly.

During the process of winding the to-be-wound piece 10, the driving assembly can drive the movable piece 20 to move to the first position, so that a gap can be formed between the first side of the movable piece 20 and the abutting surface 12 in a spaced mode, and the end portion of the to-be-wound piece can extend into the gap. The movable member 20 is then driven by the driving assembly from the first position to the second position such that the first side of the movable member 20 is stopped by the stopping surface 12, thereby clamping the end of the member to be wound by the movable member 20 and the stopping surface 12, and then the winding member 10 can be rotated to gradually wind the member to be wound around the outer surface of the winding member 10.

That is, by the movable member 20 being engaged with the groove 11 on the outer surface of the winding member 10, the end of the member to be wound can be pressed against the winding member 10 so as to fix the end of the member to be wound when the member to be wound is wound. The battery cell can be blanked after the winding piece 10 is wound, and the end part of the to-be-wound piece of the innermost ring of the battery cell can be stopped in the groove 11 of the winding piece 10 by the movable piece 20 without passing through the center seam of the two inner clamping pins, so that the inner ring of the to-be-wound piece can be prevented from collapsing when the end part of the to-be-wound piece is loosened by the movable piece 20 in the blanking process, and the performance of the battery cell formed by winding is influenced.

Thus, according to the winding needle device 100 of the embodiment of the present utility model, by providing the groove 11 on the outer surface of the winding member 10, the movable member 20 provided in the groove 11 cooperates with the abutment surface 12 provided in the groove 11, so that the end of the winding member to be wound can be clamped and unclamped, so that the winding member 10 starts winding the winding member to be wound. The movable piece 20 is used for stopping the piece to be wound in the groove 11 of the winding piece 10 and then winding the battery cell, so that the yield of winding the battery cell can be improved, and the inner ring of the battery cell is prevented from collapsing after the battery cell is removed from the winding piece 10, and the performance of the battery cell is prevented from being influenced.

Alternatively, the winding member 10 may be formed as a cylindrical member, the outer circumferential surface of the winding member 10 may be used to wind the diaphragm 71 and the pole piece 81, the groove 11 may be provided on the outer circumferential surface of the winding member 10, and the rotation of the winding member 10 may be driven by a driving structure, for example, the driving structure may drive the winding member 10 to rotate about its own axis by belt transmission.

According to one embodiment of the utility model, the recess 11 is formed as an elongated groove extending in the axial direction of the winding member 10, the abutment surface 12 extending in the axial direction of the winding member 10.

Specifically, the groove 11 of the outer surface of the winding member 10 may have an elongated shape, and the length direction of the groove 11 may be parallel to the axis of the winding member 10. A part of the inner wall surface of the groove 11 may extend in the axial direction of the winding member 10 and form a stop surface 12 so that the end of the member to be wound may extend completely into the groove 11 and be stopped against the stop surface 12 by the movable member 20.

It should be noted that the groove 11 may extend substantially in the axial direction of the winding member 10. That is, the extending direction of the groove 11 may be parallel to the axial direction of the winding member 10, or may be slightly inclined with respect to the axial direction. The abutment surface 12 may extend along the extending direction of the recess 11, and at this time, the extending direction of the abutment surface 12 may be slightly inclined from the axial direction of the winding member 10, and may still cooperate with the movable member 20 to clamp the member to be wound.

The length of the groove 11 in the axial direction of the winding member 10 may be not smaller than the width of the member to be wound, so as to avoid wrinkling when the member to be wound is inserted into the groove 11. The length of the abutment surface 12 in the axial direction of the winding member 10 is not smaller than the width of the member to be wound, so that the abutment surface 12 has a sufficient area to be in contact with the end of the member to be wound, avoiding wrinkling of the member to be wound.

Alternatively, both ends of the groove 11 in the axial direction of the winding member 10 may penetrate through both end surfaces of the winding member 10 in the axial direction thereof, respectively, so as to facilitate the observation of the states of the movable member 20 and the member to be wound from the end of the winding member 10, while also facilitating the installation of the movable member 20 and the driving assembly on the winding member 10.

In this embodiment, by providing the groove 11 and the abutment surface 12 extending along the axial direction of the winding member 10, the abutment surface 12 and the movable member 20 cooperate to clamp the end of the winding member and guide the winding member to wind around the circumference of the winding member 10, so as to avoid misalignment between the winding member and the outer surface of the winding member 10 and influence the winding accuracy of the winding member.

Alternatively, the extending direction of the groove 11 may also have an angle with the axial direction of the winding member 10, for example, the groove 11 may extend spirally on the outer surface of the winding member 10. The abutment surface 12 may extend in the extending direction of the groove 11.

According to other embodiments of the utility model, the recess 11 also has an abutment surface 13, the abutment surface 13 being arranged opposite the abutment surface 12 and being distributed at intervals along the circumference of the winding member 10, the movable member 20 being movable between the abutment surface 12 and the abutment surface 13, a first side of the movable member 20 facing the abutment surface 12 and a second side of the movable member 20 facing the abutment surface 13.

Specifically, a further part of the inner wall surface of the groove 11 may be formed as an abutment surface 13, the abutment surface 13 and the stop surface 12 being opposed to each other, and the abutment surface 13 and the stop surface 12 may be spaced apart in the circumferential direction of the winding member 10. For example, the groove 11 may have two side wall surfaces and a bottom surface, the bottom surface may be connected between the two side wall surfaces, and the two side wall surfaces may be spaced apart. One of the two sidewall surfaces may form the abutment surface 12 and the other may form the abutment surface 13.

The movable member 20 may be disposed between the abutment surface 13 and the abutment surface 12 and movable between the two surfaces. The side of the movable member 20 facing the abutment surface 12 may be a first side of the movable member 20, and the side of the movable member 20 facing the abutment surface 13 may be a second side of the movable member 20.

With the moveable member 20 in the first position, a first side of the moveable member 20 may be spaced apart from the abutment surface 12 and a second side of the moveable member 20 may be proximate the abutment surface 13. With the moveable member 20 in the second position, a first side of the moveable member 20 may be in abutment with the abutment surface 12 and a second side of the moveable member 20 may be remote from the abutment surface 13.

In the present embodiment, by providing the abutment surface 13 opposite to the abutment surface 12, and the abutment surface 13 is spaced apart from the abutment surface 12 along the circumferential direction of the winding member 10, the movable member 20 can be limited by moving the movable member 20 between the two surfaces of the groove 11, so as to avoid interference between the winding of the exposed outer surface of the movable member 20 to the winding member 10.

In some embodiments of the present utility model, as shown in fig. 5 and 9, the driving assembly includes: push rod 31, driving member 32, push block 33, driving roller 34 and first elastic member 21.

Specifically, the push rod 31 is movably disposed in the winding member 10 along the axial direction of the winding member 10, the driving member 32 is engaged with the push rod 31 to drive the push rod 31 to move along the axial direction of the winding member 10, the push block 33 is connected with the push rod 31 and moves synchronously with the push rod 31, the push block 33 has an inclined surface 331 extending obliquely with respect to the axial direction of the winding member 10, the driving roller 34 is rotatably disposed in the movable member 20, the outer peripheral surface of the driving roller 34 is stopped against the inclined surface 331, and the push block 33 is engaged with the driving roller 34 to drive the movable member 20.

In other words, the driving assembly of the present embodiment may be mainly composed of the push rod 31, the driving member 32, the push block 33, the driving roller 34, and the first elastic member 21. Wherein, push rod 31 can wear to establish in coiling member 10, push rod 31 can extend along coiling member 10's axial roughly, and push rod 31 can move in coiling member 10. The end of the push rod 31 may be connected to a driving member 32, and the push rod 31 may be driven to move within the winding member 10 by the driving member 32.

For example, a first end of the push rod 31 may extend beyond the end of the winding member 10, and an output end of the driving member 32 may be opposite to the end of the winding member 10 and drive the push rod 31 to move in the axial direction of the winding member 10. Alternatively, the driving member 32 may be a driving cylinder, the output end of the driving cylinder may be a telescopic end, the telescopic end of the driving cylinder may be opposite to the first end of the push rod 31, and the telescopic end of the driving cylinder may push the push rod 31 into the winding member 10, or may release the push rod 31.

In addition, a push block 33 may be fixedly installed on the push rod 31, and the push block 33 may be moved synchronously with the push rod 31. That is, the push block 33 is movable in the axial direction of the winding member 10 by the driving of the driving member 32. A portion of the outer surface of the push block 33 may be formed as an inclined surface 331, and the inclined surface 331 may be inclined with respect to the axial direction of the winding member 10. That is, the push block 33 may be formed as a wedge.

The movable member 20 may be provided with a driving roller 34, and the driving roller 34 may rotate on the movable member 20, and an axis of the driving roller 34 may extend in a radial direction of the winding member 10. The inclined surface 331 of the push block 33 may abut against the outer peripheral surface of the driving roller 34.

Alternatively, the number of the push blocks 33 and the driving rollers 34 may be plural, and the push blocks 33 and the driving rollers 34 may be in one-to-one correspondence. The plurality of pushing blocks 33 and the plurality of driving rollers 34 are arranged, so that smoothness of movement of the movable piece 20 is improved.

For ease of description, the axial direction of the winding member 10 may be defined as the first direction. When the driving member 32 drives the push rod 31 to move forward in the first direction as shown in fig. 9, the push block 33 also moves forward in the first direction, and the push block 33 can push the driving roller 34 to move downward along the inclined surface 331, so that the movable member 20 connected with the driving roller 34 is far away from the abutment surface 12. That is, the pushing block 33 cooperates with the driving roller 34 to drive the movable member 20 from the second position to the first position.

In this embodiment, the push rod 31, the push block 33 and the driving roller 34 cooperate to drive the movable member 20 from the second position to the first position by using the power of the driving member 32, so that the movable member 20 is separated from the abutment surface 12. The driving assembly of the present embodiment has a simple structure, and is disposed in the winding member 10, which is advantageous for saving installation space and improving compactness of the winding needle device 100. In addition, the driving roller 34 is matched with the inclined surface 331, so that the friction force when the pushing block 33 pushes the movable piece 20 can be reduced, and the smoothness of the movement of the movable piece 20 is improved.

In some embodiments of the utility model, the drive assembly further comprises a first resilient member 21. The first elastic member 21 is disposed between the second side of the movable member 20 and the abutment surface 13, the first end of the first elastic member 21 is connected to the second side of the movable member 20, the second end of the first elastic member 21 is connected to the abutment surface 13, and when the movable member 20 is in the second position, the first elastic member 21 presses the movable member 20 to press the movable member 20 against the abutment surface 12.

Specifically, the movable member 20 may be connected to the abutment surface 13 by a first elastic member 21, and the first elastic member 21 is stretchable in a direction of the abutment surface 13 toward the abutment surface 12. The first end of the first elastic member 21 in the expansion and contraction direction may be connected to the second side of the movable member 20, and the second end of the first elastic member 21 in the expansion and contraction direction may be connected to the abutment surface 13. The connection between the first elastic member 21 and the movable member 20 and the connection between the first elastic member 21 and the abutment surface 13 may be fixed connection or abutment, and are not limited herein.

In addition, the first elastic member 21 may be in a compressed state when the movable member 20 moves between the first position and the second position. During the process of moving the movable member 20 from the second position to the first position, the driving assembly can overcome the elastic force exerted on the movable member 20 by the first elastic member 21, so that the movable member 20 moves away from the abutment surface 12. And in the case where the movable member 20 is in the second position, since the first elastic member 21 is in a compressed state, the first elastic member 21 can press the movable member 20 against the abutment surface 12 so as to clamp the end portion of the member to be wound.

With the movable member 20 in the first position, the first elastic member 21 may exert an elastic force on the movable member 20 toward the abutment surface 12, so that the movable member 20 has a tendency to move toward a direction approaching the abutment surface 12. After the driving member 32 can release the push rod 31, the output end of the driving member 32 may be spaced apart from the push rod 31, and the movable member 20 may be moved from the first position to the second position by the elastic force of the first elastic member 21, so that the driving roller 34 moves upward along the inclined surface 331, thereby moving the push rod 31 and the push block 33 in the opposite direction of the first direction shown in fig. 9. And when the movable member 20 is in the second position and abuts against the abutting surface 12, the first elastic member 21 in a compressed state can press the movable member 20, so that the movable member 20 applies a clamping force to the abutting surface 12 to clamp the end of the member to be wound in cooperation with the abutting surface 12.

In the present embodiment, by providing the first elastic member 21 between the movable member 20 and the abutment surface 13, the movable member 20 can be driven to move from the first position to the second position by the first elastic member 21, so that the movable member 20 abuts against the abutment surface 12. Thus, the drive assembly of the present embodiment can drive the movable member 20 between the first position and the second position. Furthermore, by the elastic force of the first elastic member 21, the end of the member to be wound can be clamped in cooperation with the abutment surface 12, so that the influence of the release of the member to be wound on the winding of the winding member 10 can be avoided.

According to some alternative embodiments of the present utility model, the abutment surface 13 is provided with a guide hole, and the needle winding device 100 further includes a guide member 22, one end of the guide member 22 is disposed on the second side of the movable member 20, and the guide member 22 is movably disposed in the guide hole along the axial direction of the guide hole.

Specifically, the guide member 22 may extend in the moving direction of the movable member 20, for example, the abutment surface 13 and the abutment surface 12 may be parallel to each other, the movable member 20 may move in a direction perpendicular to the abutment surface 13, and the guide member 22 may also extend in a direction perpendicular to the abutment surface 13 so as to guide the movable member 20 to smoothly move within the recess 11.

One end of the guide member 22 may be located in the groove 11 and connected to the second side of the movable member 20, and in addition, the guide member 22 may be inserted into a guide hole on the abutment surface 13 and movable along the guide hole, and the guide hole may extend in the moving direction of the movable member 20. The guide 22 may define the direction of movement of the moveable member 20 to enhance the stability of movement of the moveable member 20 within the recess 11.

Alternatively, the first elastic member 21 may be a spring, and the spring may be sleeved on the outer circumference of the guide member 22 to further improve the stability of the movement of the movable member 20.

According to other embodiments of the present utility model, as shown in fig. 4 and 9, the movable member 20 includes a connecting portion 23 and a plurality of abutting portions 24. Specifically, the connecting portion 23 is formed as an elongated block extending in the axial direction of the winding member 10, the connecting portion 23 is connected to the driving unit, the plurality of abutting portions 24 are provided at intervals in the axial direction of the winding member 10 to the connecting portion 23, the abutting portions 24 are spaced apart from the abutting surface 12 when the movable member 20 is in the first position, and the abutting portions 24 are abutted against the abutting surface 12 when the movable member 20 is in the second position.

In other words, the movable member 20 of the present embodiment may be mainly composed of the connecting portion 23 and the plurality of stopper portions 24, wherein the connecting portion 23 may be used to connect the plurality of stopper portions 24. The connection portion 23 may have an elongated shape, and the connection portion 23 may extend in the axial direction of the winding member 10. That is, the length direction of the connection portion 23 may be parallel to the axis of the winding member 10.

The plurality of stopper portions 24 may be arranged at intervals in the length direction of the connecting portion 23, and the plurality of stopper portions 24 may sandwich the end portion of the member to be wound in cooperation with the stopper surface 12. Specifically, the driving assembly may be connected to the connection portion 23 to drive the plurality of abutment portions 24 to move synchronously through the connection portion 23. With the moveable member 20 in the first position, each abutment 24 may be spaced apart from the abutment surface 12 to form a gap so that the end of the member to be wound extends between the abutment 24 and the abutment surface 12. With the moveable member 20 in the second position, each abutment 24 may abut against the abutment surface 12 to clamp the end of the member to be wound.

The connecting portion 23 may extend substantially in the axial direction of the winding member 10. That is, the extending direction of the connecting portion 23 may be parallel to the axial direction of the winding member 10, or may be slightly inclined relative to the extending direction, so that the connecting portion 23 may move in the groove 11 and drive the plurality of abutting portions 24 to abut against the abutting surfaces 12.

In this embodiment, by providing a plurality of stopping portions 24, and the plurality of stopping portions 24 are driven by the connection portion 23, when the movable member 20 and the stopping surface 12 cooperate to clamp the end of the member to be wound, a plurality of positions of the end of the member to be wound can be clamped at the same time, so as to improve the stability of clamping the member to be wound and avoid the influence of the releasing of the member to be wound on the winding.

In some embodiments of the present utility model, the first side surface of the connection portion 23 is disposed opposite to the abutment surface 12, and the abutment portion 24 is formed as a projection extending obliquely toward the abutment surface 12 with respect to the first side surface of the connection portion 23, and an end surface of the projection toward the abutment surface 12 is formed as an arc surface 241.

Specifically, the side of the connection portion 23 opposite to the abutment surface 12 may be a first side of the connection portion 23, and a surface of the first side of the connection portion 23 may be opposite to the abutment surface 12. The abutment 24 may be formed as a protrusion provided on the connection portion 23, the protrusion may be inclined with respect to the first side surface of the connection portion 23, and the inclination direction of the protrusion may be directed out of the abutment surface 12 and the opening of the recess 11 so that the abutment 24 may be closer to the outer surface of the winding member 10. Therefore, when the movable member 20 moves to the second position, the end surface of the protrusion facing the abutment surface 12 may abut against the abutment surface 12, and the first side surface of the connection portion 23 may be spaced apart from the abutment surface 12, so as to avoid buckling deformation of the to-be-wound member caused by contact between the connection portion 23 and the to-be-wound member when the protrusion and the abutment surface 12 clamp the end of the to-be-wound member, and simultaneously, the length of the to-be-wound member extending into the groove 11 may be reduced due to the abutment portion 24 abutting against the outer surface of the to-be-wound member 10, so as to avoid collapse of the inner ring of the to-be-wound cell.

In addition, the end face of the bump facing the abutting surface 12 may be an arc surface 241, and the end of the piece to be wound is abutted against the abutting surface 12 through the arc surface 241, so that the end of the piece to be wound can be protected, and the bump is prevented from damaging the piece to be wound, thereby affecting the performance of the battery core.

According to other embodiments of the utility model, the winding member 10 comprises a fixed half needle 15 and two movable half needles 16. The outer surface of the fixed half needle 15 is provided with a groove 11, two movable half needles 16 are respectively arranged at two sides of the fixed half needle 15, the outer surfaces of the two movable half needles 16 are matched with the outer surface of the fixed half needle 15 to form a winding surface for winding a piece to be wound, and each movable half needle 16 is respectively movable relative to the fixed half needle 15 to adjust the circumference of the winding surface.

In particular, the fixed half-needles 15 may be connected to a driving structure that may drive the rotation of the fixed half-needles 15 about the axis of the winding member 10. The outer surface of the fixed half needle 15 may be left and right sides as shown in fig. 5, and both sides may be curved. Grooves 11 may be provided on the outer surface of the fixed half needle 15, and in particular, grooves 11 may be provided on the left and/or right side of the fixed half needle 15. The end of the piece to be wound can be clamped against the fixed half needle 15 by the movable piece 20 in the groove 11 cooperating with the abutment surface 12 of the groove 11.

On both sides of the fixed half needle 15, movable half needles 16 may be provided, and the fixed half needle 15 may be located between the two movable half needles 16. The outer surface of the movable half needle 16 may be an arc surface, and as shown in fig. 5, the outer surface of the movable half needle 16 above the fixed half needle 15 may be an upper side surface of the movable half needle 16, and the outer surface of the movable half needle 16 below the fixed half needle 15 may be a lower side surface of the movable half needle 16. The outer surface of the fixed half needle 15 and the outer surface of the movable half needle 16 may be surrounded to form a winding surface through which the winding member 10 may be wound.

In addition, the movable half needle 16 may be movably connected with the fixed half needle 15, and in particular, the two movable half needles 16 may be respectively movable in the radial direction of the winding member 10 to change the circumference of the winding surface. The circumference of the winding surface may increase when the movable half needle 16 is far from the fixed half needle 15, and the circumference of the winding member 10 may decrease when the movable half needle 16 is close to the fixed half needle 15.

For example, the movable half needle 16 may be movably connected with the fixed half needle 15 by a guide rod 161, and the guide rod 161 may guide the movable half needle 16 to slide in the radial direction of the winding member 10. The movable half needle 16 may be connected with a cam 164, a cam plate 162 may be provided in the fixed half needle 15, and the cam plate 162 may be movable with respect to the fixed half needle 15. The cam plate 162 may be provided with a cam groove 163, the cam 164 may be connected to the cam groove 163, one end of the cam plate 162 may protrude from the fixed half needle 15 and be stopped against an end surface of the driving structure of the fixed half needle 15 by a third elastic member 165, and the third elastic member 165 may be a spring. The cam plate 162 is movable by the third elastic member 165, and drives the movable half needle 16 to move by cooperation of the cam groove 163 and the cam 164.

In the present embodiment, the movable half needles 16 are provided on both sides of the fixed half needle 15, and the circumference of the winding surface of the winding member 10 can be adjusted by the movement of the movable half needles 16. That is, the outer diameter of the winding member 10 may be adjusted so that tabs on the plurality of pole pieces 81 wound by the winding member 10 may be aligned with each other, reducing a positional error between the tabs on the respective pole pieces 81. In addition, the groove 11 is arranged on the fixed half needle 15, so that the piece to be wound can be clamped on the fixed half needle 15, and the effect of the movement of the movable half needle 16 on the fixing of the end part of the piece to be wound, which is caused by the winding piece 10, is avoided.

The embodiment of the utility model also provides a battery cell winding device, which comprises the winding needle device 100 according to any of the above embodiments. Since the winding needle device 100 according to the embodiment of the present utility model has the above technical effects, the battery cell winding apparatus according to the embodiment of the present utility model also has the corresponding technical effects of improving the yield of battery cell winding and preventing the inner ring of the battery cell from collapsing after the battery cell is stripped from the winding member 10, which affects the performance of the battery cell.

In some embodiments of the present utility model, the needle device 100 further comprises a pushing assembly 40, wherein the pushing assembly 40 is disposed near the outer surface of the winding member 10, and the pushing assembly 40 is movable to push the member to be wound into the groove 11.

In particular, a pushing assembly 40 may be provided adjacent the outer surface of the winding member 10, the pushing assembly 40 being movable in a direction towards or away from the winding member 10. When the pushing assembly 40 approaches the winding member 10, the pushing assembly 40 can push the end of the member to be wound into the groove 11, and when the pushing assembly 40 pushes the end of the member to be wound, the movable member 20 can be at the first position, and the pushing assembly 40 can push the end of the member to be wound between the movable member 20 and the abutment surface 12, so that the movable member 20 moves from the first position to the second position and cooperates with the abutment surface 12 to clamp the end of the member to be wound.

After the movable member 20 engages with the abutment surface 12 to clamp the end of the winding member 10, the pusher assembly 40 may be withdrawn from the recess 11 and the winding member 10 may begin to wind the member to be wound.

In this embodiment, by providing the pushing component 40, the to-be-wound piece can be automatically pushed into the forward groove 11 before the winding piece 10 starts to wind, which is beneficial to improving the winding efficiency of the winding needle device 100.

According to some alternative embodiments of the present utility model, the pushing assembly 40 includes: a support 41, two stop rollers 42 and a movable roller 43.

Specifically, the support 41 is movably disposed on the outer side of the winding member 10, two abutment rollers 42 are disposed on the support 41 at intervals along the circumferential direction of the winding member 10, the two abutment rollers 42 are respectively used for abutting the to-be-wound member against the outer surface of the winding member 10, the movable roller 43 is movably disposed on the support 41 and between the two abutment rollers 42, and the movable roller 43 is used for pushing the to-be-wound member into the groove 11.

In other words, the pushing assembly 40 of the present embodiment may mainly include a support 41, two abutment rollers 42 and a movable roller 43. Wherein, the support 41 can move towards the direction of approaching or separating from the winding member 10, two stopping rollers 42 and movable rollers 43 can be arranged on the support 41, and the stopping rollers 42 and the movable rollers 43 can synchronously move with the support 41 to approach or separate from the outer surface of the winding member 10.

In addition, in the case where the support 41 is close to the winding member 10, the abutment roller 42 may abut the member to be wound against the outer surface of the winding member 10, and the member to be wound between the two abutment rollers 42 may correspond to the groove 11. A movable roller 43 may be disposed between the two abutment rollers 42, and the movable roller 43 may be connected to the support 41 by a driving structure, and the movable roller 43 and the abutment rollers 42 may be rotatable respectively. The movable roller 43 can be driven to extend between the two stop rollers 42 by the driving structure so as to push the piece to be wound into the groove 11.

The movable roller 43 can extend into the recess 11 when pushing the piece to be wound. After the movable roller 43 completes pushing, the movable member 20 can be switched from the first position to the second position to clamp the member to be wound in cooperation with the abutment surface 12, and then the movable roller 43 can be withdrawn from the groove 11, so that the member to be wound 10 can be wound, and interference between the movable roller 43 and the member to be wound is avoided.

In this embodiment, by providing two abutment rollers 42 on the support 41, a portion of the member to be wound can be pressed against the outer surface of the winding member 10, so that the movable member 20 and the abutment surface 12 can clamp the member to be wound conveniently by pushing a portion of the member to be wound into the groove 11 with the movable roller 43 provided between the two abutment rollers 42. Because the movable roller 43 is rotatable, the movable roller 43 can roll the end of the to-be-wound piece on the stop surface 12 along the stop surface 12, so that the movable piece 20 presses the end of the to-be-wound piece on the stop surface 12, and the to-be-wound piece is prevented from being wrinkled or damaged when being pushed.

Alternatively, the abutment roller 42 may be connected to the support 41 by a mounting block 421, and the abutment roller 42 may be rotatably connected to the mounting block 421. The support 41 may be provided with a guide bar 424, and the guide bar 424 is slidable with respect to the support 41 in a direction approaching or moving away from the winding member 10. The mounting block 421 can be mounted at one end of the guide rod 424 away from the support 41, and a fourth elastic member 423 can be sleeved on the guide rod 424, the fourth elastic member 423 can be a spring, one end of the fourth elastic member 423 can be connected with the mounting block 421, and the other end of the fourth elastic member 423 can be connected with the support 41. When the stopping roller 42 stops the to-be-wound piece against the outer surface of the winding piece 10, the fourth elastic piece 423 can buffer the stopping roller 42 to avoid the stopping roller 42 from damaging the to-be-wound piece.

According to other embodiments of the present utility model, the pushing assembly 40 further comprises: a pushing driving member 433, a mounting seat 431 and a second elastic member 434.

Wherein, the pushing driving member 433 is disposed on the support 41, a first end of the mounting seat 431 is provided with a movable roller 43 rotatable around its axis, a second end of the mounting seat 431 is rotatably connected with the pushing driving member 433, the pushing driving member 433 can drive the movable roller 43 on the mounting seat 431 to extend into or withdraw from the groove 11, the second elastic member 434 is disposed between the mounting seat 431 and the pushing driving member 433, and under the condition that the movable roller 43 extends into the groove, the second elastic member 434 extrudes the mounting seat 431 to press the movable roller 43 against the abutment surface 12.

Specifically, the pushing actuator 433 may be mounted on the support 41, the pushing actuator 433 may have a movable end 4331, and the movable end 4331 of the pushing actuator 433 may be located closer to or farther from the winder 10. The movable end 4331 of the pusher driver 433 may be coupled to the second end of the mount 431 to drive the mount 431 toward or away from the winder 10. In addition, another

The first end of the mount 431 may extend toward the winding member 10, the movable roller 43 may be mounted at the first end of the mount 431, and the movable roller 43 may rotate about its own axis, and the axis of the movable roller 43 may extend substantially in the axial direction of the winding member 10. When the pushing driving member 433 drives the mounting seat 431 to approach the winding member 10, the movable roller 43 may extend into the groove 11, so as to push the to-be-wound member into the groove 11.

The second end of the mount 431 may be rotatably connected to the movable end 4331 of the pushing driving member 433, for example, the second end of the mount 431 may be hinged to the movable end 4331 of the pushing driving member 433 through a rotating shaft 432, so that the movable roller 43 on the mount 431 may rotate around the axis of the rotating shaft 432.

In addition, a second elastic member 434 may be abutted between the second end of the mounting seat 431 and the movable end 4331 of the pushing driving member 433, and the second elastic member 434 may be spaced apart from the rotating shaft 432. After the movable roller 43 extends into the groove 11, the mounting seat 431 can be pressed under the action of the second elastic member 434, so that the movable roller 43 on the mounting seat 431 can better press against the abutment surface 12 in the groove 11, thereby clamping the to-be-wound piece in cooperation with the abutment surface 12, so that the movable member 20 and the abutment surface 12 can clamp the to-be-wound piece in cooperation, and the to-be-wound piece is prevented from loosening.

In this embodiment, the movable roller 43 can be driven by the pushing driving member 433 to extend into or withdraw from the groove 11, so that the movable roller 43 pushes the member to be wound into the groove 11. In addition, since the mounting seat 431 is rotationally connected with the pushing driving member 433 and is abutted with the pushing driving member 433 through the second elastic member 434, the mounting seat 431 can float on the pushing driving member 433 under the action of the second elastic member 434, so that the movable roller 43 can be better attached to the abutment surface 12, and in the process of pushing the member to be wound, the attaching state of the movable roller 43 to the member to be wound is maintained.

According to other embodiments of the present utility model, the movable member 20 includes a plurality of stopping portions 24, the number of the movable rollers 43 is plural, the plurality of movable rollers 43 are spaced apart along the axial direction of the winding member 10, and the plurality of movable rollers 43 are staggered with the plurality of stopping portions 24.

Specifically, the support 41 may be provided with a plurality of movable rollers 43, and the plurality of movable rollers 43 may be spaced apart along the axial direction of the winding member 10. That is, the distribution direction of the plurality of movable rollers 43 and the distribution direction of the plurality of stoppers 24 may be the same.

In addition, the plurality of movable rollers 43 and the plurality of stopping portions 24 may be staggered, so that each movable roller 43 may extend between two corresponding stopping portions 24, so that after the movable roller 43 sends the to-be-wound piece into the groove 11, the stopping portion 24 of the movable piece 20 may stop the to-be-wound piece on the stopping surface 12.

In some embodiments of the present utility model, the winding needle device 100 further includes a cutting assembly 50, where the cutting assembly 50 is disposed on the support 41 and between the two abutment rollers 42, and the cutting assembly 50 is used for cutting the piece to be wound.

Specifically, the cutting assembly 50 may include a cutter 51, and the cutter 51 may be disposed between the two abutment rollers 42. After the stopping roller 42 stops the piece to be wound on the outer surface of the winding piece 10, the cutter 51 of the cutting assembly 50 can cut the piece to be wound, two ends can be formed after the piece to be wound is cut, and one end can be pushed into the groove 11 by the movable roller 43. Alternatively, the cutter 51 may cut the member to be wound by heating.

According to some alternative embodiments of the present utility model, the winding needle device 100 further comprises two shields 60, the two shields 60 being spaced apart on both sides of the cutting assembly 50, each shield 60 being movably connected with the support 41 to be close to or remote from the winding member 10, respectively.

Specifically, a protective cover 60 may be provided at both sides of the cutter 51 of the cutting assembly 50, and the protective cover 60 may be movably coupled with the holder 41 by a spring and a guide structure. When the stopping roller 42 stops the piece to be wound on the outer surface of the winding piece 10, the two protecting covers 60 can elastically abut against the piece to be wound which is stopped on the outer surface of the winding piece 10 under the action of the springs, and the springs connected to the two protecting covers 60 can be compressed in the process that the support 41 is continuously close to the winding piece 10, so that the cutting assembly 50 can be exposed from between the two protecting covers 60 to cut the piece to be wound.

In the present embodiment, the protective covers 60 are provided at both sides of the cutting assembly 50, so that the cutting assembly 50 can be protected while the cutters 51 in the cutting assembly 50 are thermally insulated.

In other embodiments of the present utility model, two shields 60 may be coupled to a shield driving structure, which may be provided on the support 41, and which may drive the shields 60 away from the piece to be wound when the cutting assembly 50 is required to cut the piece to be wound, so that the cutting assembly 50 may be exposed from between the shields 60 to cut the piece to be wound.

Optionally, the needle winding device 100 further comprises two diaphragm delivery assemblies 70, two pole piece delivery assemblies 80, and a turret 90. Wherein the two diaphragm delivery assemblies 70 and the two pole piece delivery assemblies 80 are staggered. Diaphragm transport assembly 70 may transport diaphragm 71 to winder 10 and pole piece transport assembly 80 may transport pole piece 81 to winder 10.

Two winding members 10 may be provided on the turret 90, the two winding members 10 may be spaced apart, and a turnover support shaft 91 may be provided between the two winding members 10. The flipping support shaft 91 may be located at the rotation center of the turret 90. The roll-over support shaft 91 may have a plurality of outwardly extending ends, each of which may be provided with a stick 92 at an end thereof.

For ease of illustration, two winding members 10 may be defined as a first winding needle 17 and a second winding needle 18, respectively. When the first winding needle 17 completes winding, the turret 90 may be rotated to the position shown in fig. 1, so that a part of the diaphragms 71 conveyed by the two diaphragm conveying members 70 are supported by the over-rollers 92 of the inverting support shaft 91, the outer peripheral surfaces of the over-rollers 92 are stopped against a part of the diaphragms 71, and a further part of the diaphragms 71 conveyed by the two diaphragm conveying members 70 may pass from the peripheral side of the second winding needle 18.

The pushing assembly 40 may then be brought into the state shown in fig. 2, where the two abutment rollers 42 in the pushing assembly 40 may abut the two diaphragms 71 against the outer surface of the second winding needle 18, and the diaphragms 71 that are abutted against the outer surface of the second winding needle 18 are opposite to the grooves 11. At this time, the protecting cover 60 may also stop against the surface of the diaphragm 71, at this time, the movable member 20 may be spaced apart from the stop surface 12, the cutting assembly 50 may be exposed between the two protecting covers 60 to cut the diaphragm 71 between the two stop rollers 42, and after the diaphragm 71 is cut, two parts are formed, where one part may be terminated by the first winding needle 17, and the other part may be pushed into the groove 11 by the movable roller 43 and clamped by the movable member 20 and the stop surface 12.

The embodiment of the utility model also provides a winding method of the battery cell winding device, wherein the battery cell winding device further comprises a pushing component 40 and a cutting component 50, and the winding method comprises the following steps of:

driving the winding member 10 to move to a winding station;

controlling the movable member 20 to move to the first position;

the driving pushing component 40 is used for stopping the piece to be wound on the outer surface of the winding piece 10;

controlling the cutting assembly 50 to cut the member to be wound;

Controlling the pushing component 40 to convey the cut piece to be wound into the groove 11;

controlling the movable piece 20 to move to a second position, wherein the first side of the movable piece 20 and the abutting surface 12 clamp the piece to be wound;

the winding member 10 is driven to rotate about its own axis to wind the member to be wound.

The winding method of the present embodiment will be described in detail below using a winding cell as an example.

First, the winding member 10 may be driven to move to the winding station by the turret 90, then the movable member 20 may be driven to move to a first position by the driving assembly such that a gap is formed between the movable member 20 and the abutment surface 12, then the pushing assembly 40 may be driven to approach the winding member 10, two abutment rollers 42 in the pushing assembly 40 may abut the diaphragm 71 against the outer surface of the winding member 10 such that the diaphragm 71 abutting against the outer surface of the winding member 10 is opposite to the groove 11, then the cutter 51 of the cutting assembly 50 may cut the diaphragm 71, then the movable roller 43 in the pushing assembly 40 may push the end of the cut diaphragm 71 between the movable member 20 and the abutment surface 12, then the driving assembly may drive the movable member 20 to move to a second position where the first side of the movable member 20 may abut the abutment surface 12 to clamp the end of the diaphragm 71, then the pushing assembly 40 and the cutting assembly 50 may be moved away from the winding member 10, then the driving structure of the winding member 10 may drive the winding itself to rotate and wind the diaphragm 71 and the pole piece 81.

Since the winding needle device 100 according to the embodiment of the present utility model has the above technical effects, the winding method according to the embodiment of the present utility model also has the corresponding technical effects of improving the yield of the winding of the battery cell and preventing the inner ring of the battery cell from collapsing after the battery cell is stripped from the winding member 10, which affects the performance of the battery cell.

According to some alternative embodiments of the utility model, the drive assembly comprises: the steps of controlling the movable member 20 to move to the first position include: the push rod 31 and the push block 33 connected to the push rod 31 are pushed by the driving member 32 to move along the axial direction of the winding member 10, and the inclined surface 331 of the push block 33 cooperates with the driving roller 34 to drive the movable member 20 to move to the first position in a direction away from the abutment surface 12.

Specifically, the output end of the driving member 32 may push the push rod 31 from the end of the push rod 31 to move forward in the first direction as shown in fig. 9, so that the push block 33 fixedly connected to the push rod 31 also moves forward in the first direction, and the driving roller 34 disposed on the movable member 20 may move downward under the driving of the inclined surface 331 of the push block 33, so that the movable member 20 may move to the first position in a direction away from the abutment surface 12 against the elastic force of the first elastic member 21, so that the member to be wound is fed between the movable member 20 and the abutment surface 12.

It should be noted that the push rod 31 and the push block 33 may move substantially in the axial direction of the winding member 10. That is, the moving direction of the push rod 31 and the push block 33 may be parallel to the axial direction of the wound member, or may be slightly inclined with respect to the axial direction, so that the movable member 20 may be prevented from abutting against the abutting surface 12 by the movement of the push rod 31 and the push block 33.

In some embodiments of the present utility model, the driving assembly further includes a first elastic member 21, and the step of controlling the movable member 20 to move to the second position includes: the movable member 20 is driven to move to the second position in a direction approaching the abutting surface 12 by the first elastic member 21, and the movable member 20 and the member to be wound are pressed against the abutting surface 12 by the first elastic member 21.

Specifically, the output end of the driving member 32 may be separated from the push rod 31, at this time, the first elastic member 21 in a compressed state may naturally extend to drive the movable member 20 to approach the abutment surface 12, and make the movable member 20 move to the second position to abut against the abutment surface 12, at this time, the first elastic member 21 is still in a compressed state, and the first elastic member 21 may press the movable member 20 against the abutment surface 12, so that the movable member 20 and the abutment surface 12 cooperate to clamp the member to be wound.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (16)

1. A needle winding device, comprising:

the winding piece can rotate around the axis of the winding piece, the outer surface of the winding piece is provided with an inwards concave groove, and the groove is provided with a stopping surface;

the movable piece is movably arranged in the groove between a first position and a second position, the first side of the movable piece is spaced from the abutting surface when the movable piece is in the first position, and the first side of the movable piece is abutted against the abutting surface when the movable piece is in the second position;

the driving assembly is connected with the movable piece to drive the movable piece to move between the first position and the second position.

2. The needle winding device according to claim 1, wherein the groove is formed as an elongated groove extending in an axial direction of the winding member, and the abutment surface extends in the axial direction of the winding member.

3. Needle winding device according to claim 1 or 2, characterized in that the recess further has an abutment surface arranged opposite the abutment surface and spaced apart in the circumferential direction of the winding member, the movable member being movable between the abutment surface and the abutment surface, a first side of the movable member facing the abutment surface and a second side of the movable member facing the abutment surface.

4. The needle winding device of claim 1, wherein the drive assembly comprises:

the push rod is movably arranged in the winding piece along the axial direction of the winding piece;

the driving piece is matched with the push rod to drive the push rod to move along the axial direction of the winding piece;

the push block is connected with the push rod and moves synchronously with the push rod, and is provided with an inclined surface which extends obliquely relative to the axial direction of the winding piece;

the driving roller is rotatably arranged on the movable piece, the outer peripheral surface of the driving roller is abutted to the inclined surface, and the pushing block is matched with the driving roller to drive the movable piece.

5. The needle roller assembly of claim 4, wherein the recess further has an abutment surface opposite the stop surface, the drive assembly further comprising:

the first elastic piece is arranged between the second side of the movable piece and the abutting surface, the first end of the first elastic piece is connected with the second side of the movable piece, the second end of the first elastic piece is connected with the abutting surface, and under the condition that the movable piece is in the second position, the first elastic piece extrudes the movable piece to press the movable piece to the abutting surface.

6. The needle roller device of claim 5, wherein the abutment surface is provided with a guide hole, the needle roller device further comprising:

the guide piece, the one end of guide piece is located the second side of moving part, the guide piece is followed the axial of guiding hole is movably located the guiding hole.

7. The winding needle device according to claim 1 or 2, wherein the movable member comprises:

a connecting portion formed as an elongated block extending in an axial direction of the winding member, the connecting portion being connected with the driving assembly;

the plurality of stopping parts are arranged on the connecting part at intervals along the axial direction of the winding piece, the stopping parts are spaced from the stopping surfaces when the movable piece is at the first position, and the stopping parts are stopped from the stopping surfaces when the movable piece is at the second position.

8. The needle winding device according to claim 7, wherein the first side surface of the connecting portion is disposed opposite to the abutment surface, the abutment portion is formed as a projection extending obliquely toward the abutment surface with respect to the first side surface of the connecting portion, and an end surface of the projection toward the abutment surface is formed as an arc surface.

9. The needle winding device of claim 1, wherein the winding member comprises:

the outer surface of the fixed half needle is provided with the groove;

the two movable half needles are respectively arranged on two sides of the fixed half needle, the outer surfaces of the two movable half needles are matched with the outer surfaces of the fixed half needles to form a winding surface for winding a piece to be wound, and each movable half needle is respectively movable relative to the fixed half needle to adjust the circumference of the winding surface.

10. A cell winding apparatus, comprising: the needle winding device of any one of claims 1-9.

11. The cell winding apparatus of claim 10, further comprising:

the pushing component is arranged close to the outer surface of the winding piece and can move to push the piece to be wound into the groove.

12. The cell winding apparatus of claim 11, wherein the pushing assembly comprises:

the support is movably arranged on the outer side of the winding piece;

the two stopping rollers are arranged on the support at intervals along the circumferential direction of the winding piece and are respectively used for stopping the piece to be wound on the outer surface of the winding piece;

The movable roller is movably arranged on the support and positioned between the two stop rollers, and is used for pushing the piece to be wound into the groove.

13. The cell winding apparatus of claim 12, wherein the pushing assembly further comprises:

the pushing driving piece is arranged on the support;

the first end of the mounting seat is provided with the movable roller which can rotate around the axis of the mounting seat, the second end of the mounting seat is rotationally connected with the pushing driving piece, and the pushing driving piece can drive the movable roller on the mounting seat to extend into or withdraw from the groove;

the second elastic piece is arranged between the mounting seat and the pushing driving piece, and the second elastic piece extrudes the mounting seat to press the movable roller against the stopping surface under the condition that the movable roller stretches into the groove.

14. The cell winding apparatus of claim 12, wherein the movable member includes a plurality of abutments, the number of movable rollers is plural, the plurality of movable rollers are spaced apart along the axis of the winding member, and the plurality of movable rollers are staggered with the plurality of abutments.

15. The cell winding apparatus of claim 12, further comprising:

the cutting assembly is arranged on the support and located between the two stop rollers, and the cutting assembly is used for cutting the piece to be wound.

16. The cell winding apparatus of claim 15, further comprising:

the two protection covers are arranged on two sides of the cutting assembly at intervals, and each protection cover is movably connected with the support respectively so as to be close to or far away from the winding piece.

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