Needle winding mechanism and winding device

Abstract

The present invention relates to a needle winding mechanism, comprising a first outer needle, a second outer needle, a first adjustment component and a second adjustment component, wherein the first adjustment component comprises a first reset structure and a first adjustment rod, and the second adjustment component comprises a second reset structure and a second adjustment rod. When winding a battery cell, it is only necessary to move the first adjustment rod and the second adjustment rod along a first sub-direction, and the first adjustment rod and the second adjustment rod can be used to push the first outer needle and the second outer needle to move respectively, thereby adjusting the spacing between the first outer needle and the second outer needle, thereby adjusting the outer circumference of the needle winding mechanism, and the adjustment speed is faster, which effectively shortens the operation time and improves production efficiency. The present invention also relates to a winding device.

Description

Technical Field

[0001] The present invention relates to the technical field of automation equipment, and in particular to a needle winding mechanism and a winding device. Background Art

[0002] In the process of preparing the battery cell, a winding device is generally used to wind the material strips such as the pole piece and the diaphragm to form the battery cell. In the actual production process, it is often necessary to frequently adjust the circumference of the winding needle (i.e., adjust the circumference by adjusting the radial dimension of the winding needle) to ensure the alignment of the pole lugs of the produced battery cell. However, in the prior art, the purpose of adjusting the circumference of the winding needle is often achieved by sticking a Teflon sheet on the winding needle, which takes a long time to operate and reduces production efficiency. Summary of the invention

[0003] Based on this, it is necessary to provide a winding needle mechanism and winding device that improve the above defects, in order to address the problem that the prior art uses a method of sticking Teflon film on the winding needle to achieve the purpose of adjusting the outer circumference of the winding needle mechanism, which takes a long time to operate and reduces production efficiency.

[0004] A needle winding mechanism comprises a fixing assembly, a first outer needle, a second outer needle, a first adjusting assembly and a second adjusting assembly;

[0005] The first outer needle and the second outer needle are both arranged longitudinally along a first direction, and are arranged at intervals along a second direction perpendicular to the first direction, and the first outer needle and the second outer needle can approach and move away from each other;

[0006] The first adjustment assembly includes a first reset structure and a first adjustment rod, the first reset structure is connected between the fixing assembly and the first outer needle, and is used to provide a force to make the first outer needle approach the second outer needle, the first adjustment rod is reciprocatingly disposed between the fixing assembly and the first outer needle along the first direction, and during the movement of the first adjustment rod along a first sub-direction of the first direction, the first adjustment rod can push the first outer needle away from the second outer needle;

[0007] The second adjustment component includes a second reset structure and a second adjustment rod. The second reset structure is connected between the fixing component and the second outer needle, and is used to provide a force to make the second outer needle approach the first outer needle. The second adjustment rod is reciprocatingly movable along the first direction between the fixing component and the second outer needle, and during the movement of the second adjustment rod along the first sub-direction, the second adjustment rod can push the second outer needle away from the first outer needle.

[0008] By setting up the above-mentioned winding needle mechanism, when winding the battery cell, it is only necessary to cooperate with the first reset structure with the first adjustment rod and the second reset structure with the second adjustment rod to adjust the distance between the first outer needle and the second outer needle, thereby adjusting the outer circumference of the winding needle mechanism. Compared with sticking Teflon sheets on the first outer needle and the second outer needle, the outer circumference is adjusted by adjusting the distance between the first outer needle and the second outer needle, and the adjustment speed is faster, which effectively shortens the operation time and improves production efficiency.

[0009] In addition, the needle winding mechanism can adjust the outer circumference only through the first reset structure cooperating with the first adjustment rod and the second reset structure cooperating with the second adjustment rod, and has a simple structure and is easy to operate.

[0010] In one embodiment, the needle winding mechanism further includes a first inner needle and a second inner needle, the first inner needle and the second inner needle are both arranged longitudinally along the first direction, the first outer needle, the first inner needle, the second inner needle and the second outer needle are sequentially arranged at intervals along the second direction, and the first inner needle and the second inner needle can approach and move away from each other;

[0011] The first adjustment component further includes a third reset structure, which is connected between the fixing component and the first inner needle and is used to provide a force to move the first inner needle away from the second inner needle, and the first adjustment rod can also push the first inner needle closer to the second inner needle during the movement of the first sub-direction;

[0012] The second adjustment component also includes a fourth reset structure, which is connected between the fixing component and the second inner needle, and is used to provide a force to move the second inner needle away from the first inner needle. The second adjustment rod can also push the second inner needle closer to the first inner needle during the movement of the first sub-direction.

[0013] In one embodiment, the fixing assembly includes a needle rolling seat, a first fixing rod and a second fixing rod, the first fixing rod and the second fixing rod are both fixedly connected to the needle rolling seat, the first inner needle and the first outer needle are arranged on the first fixing rod, and the second inner needle and the second outer needle are arranged on the second fixing rod;

[0014] The third reset structure is connected to the first fixed rod and the first inner needle, the first reset structure is connected between the first fixed rod and the first outer needle, the fourth reset structure is connected between the second fixed rod and the second inner needle, the second reset structure is connected between the second fixed rod and the second outer needle, the first adjusting rod is reciprocatably disposed between the first fixed rod and the first outer needle along the first direction, and the second adjusting rod is reciprocatably disposed between the second fixed rod and the second outer needle along the first direction.

[0015] In one embodiment, the fixing assembly further includes a first limit member and a second limit member, the first limit member is connected to the first fixing rod, the first reset structure is connected between the first limit member and the first outer needle, the second limit member is connected to the second fixing rod, and the second reset structure is connected between the second limit member and the second outer needle.

[0016] In one embodiment, the fixing assembly further includes a first pressing block and a second pressing block, the first pressing block is fixedly connected to the first fixing rod, the third reset structure is connected between the first pressing block and the first inner needle, the second pressing block is fixedly connected to the second fixing rod, and the fourth reset structure is connected between the second pressing block and the second inner needle.

[0017] In one embodiment, the needle winding mechanism further includes a first adjusting block and a third adjusting block, wherein the first adjusting block is disposed on the first inner needle, and the first adjusting rod is provided with a first matching inclined surface, and during the movement of the first adjusting rod along the first sub-direction, the first adjusting block can slide on the first matching inclined surface to make the first inner needle close to the second inner needle;

[0018] The third adjustment block is arranged on the second inner needle, and the second adjustment rod is provided with a third matching inclined surface. During the movement of the second adjustment rod along the first sub-direction, the third adjustment block can slide on the third matching inclined surface to make the second inner needle close to the first inner needle.

[0019] In one embodiment, the needle winding mechanism further includes a second adjusting block and a fourth adjusting block, the second adjusting block is arranged on the first outer needle, the first adjusting rod is provided with a second matching inclined surface, and during the movement of the first adjusting rod along the first sub-direction, the second adjusting block can slide on the second matching inclined surface to make the first outer needle away from the second outer needle;

[0020] The fourth adjustment block is arranged on the second outer needle, and the second adjustment rod is provided with a fourth matching inclined surface. During the movement of the second adjustment rod along the first sub-direction, the fourth adjustment block can slide on the fourth matching inclined surface to make the second outer needle move away from the first outer needle.

[0021] In one embodiment, the first adjusting rod may sequentially pass through a first separation position and a first contact position during the movement of the first sub-direction, and the second adjusting rod may sequentially pass through a second separation position and a second contact position during the movement of the second sub-direction;

[0022] When the first adjusting rod moves along the first sub-direction to the first separation position, the first adjusting block slides out from the first matching inclined surface;

[0023] When the first adjusting rod moves along the first sub-direction to the first contact position, the second adjusting block slides into the second matching inclined surface;

[0024] When the second adjusting rod moves along the first sub-direction to the second separation position, the third adjusting block slides out from the third matching inclined surface;

[0025] When the second adjusting rod moves to the second contact position along the first sub-direction, the fourth adjusting block slides into the fourth matching inclined surface.

[0026] In one embodiment, the needle winding mechanism also includes a first elastic member and a second elastic member, the first elastic member is connected between the fixed assembly and the first adjusting rod to provide a force to move the first adjusting rod along a second sub-direction opposite to the first sub-direction, and the second elastic member is connected between the fixed assembly and the second adjusting rod to provide a force to move the second adjusting rod along the second sub-direction.

[0027] A winding device comprises the above-mentioned winding needle mechanism.

[0028] In one embodiment, the winding device also includes a driving mechanism, which includes a driving assembly, a support member and a tail stock, the driving assembly is used to push the support member to move along the first sub-direction, the tail stock is rotatably arranged on the support member around a rotation axis parallel to the first direction, the tail stock is detachably connected to the fixing assembly, and the tail stock can abut against the first adjusting rod and the second adjusting rod during the process of the support member moving along the first sub-direction to push the first adjusting rod and the second adjusting rod to move along the first sub-direction.

[0029] In one embodiment, the driving mechanism also includes a bracket and a fourth elastic member, the support member is connected to the bracket so as to be reciprocatingly movable along a first direction, and the fourth elastic member is connected between the bracket and the support member to provide a force to move the support member along a second sub-direction opposite to the first sub-direction.

[0030] In one embodiment, the driving mechanism further includes a connecting rod and a brake assembly, the support member is connected to the connecting rod so as to be reciprocatingly movable along the first direction, the brake assembly includes a fixing ring, a brake and a clamping block, the fixing ring is fixedly connected to the connecting rod, the brake is fixedly connected to the fixing ring, the clamping block is fixedly connected to the support member, and the brake is constructed to controllably clamp the clamping block. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic structural diagram of a needle winding mechanism provided in one embodiment of the present invention;

[0033] Figure 2 for Figure 1 A schematic cross-sectional view of the needle winding mechanism shown;

[0034] Figure 3 A schematic diagram of the structure of a driving mechanism provided by another embodiment of the present invention;

[0035] Figure 4 for Figure 3 A schematic structural diagram of the driving mechanism from another angle shown;

[0036] Figure 5 for Figure 3 A schematic cross-sectional view of part of the structure of the drive mechanism shown. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0043] like Figure 1 and Figure 2 As shown, the needle winding mechanism 100 provided in one embodiment of the present invention includes a fixing component 110 , a first outer needle 121 , a second outer needle 122 , a first adjusting component 131 and a second adjusting component 135 .

[0044] The first outer needle 121 and the second outer needle 122 are both arranged longitudinally along a first direction, and are arranged at intervals along a second direction perpendicular to the first direction. The first outer needle 121 and the second outer needle 122 can approach and move away from each other.

[0045] The first adjustment component 131 includes a first reset structure 132 and a first adjustment rod 134. The first reset structure 132 is connected between the fixing component 110 and the first outer needle 121, and is used to provide a force to make the first outer needle 121 approach the second outer needle 122. The first adjustment rod 134 is reciprocatingly arranged between the fixing component 110 and the first outer needle 121 along a first direction, and during the movement of the first adjustment rod 134 along a first sub-direction in the first direction, the first adjustment rod 134 can push the first outer needle 121 away from the second outer needle 122.

[0046] The second adjustment component 135 includes a second reset structure 136 and a second adjustment rod 138. The second reset structure 136 is connected between the fixing component 110 and the second outer needle 122, and is used to provide a force to make the second outer needle 122 approach the first outer needle 121. The second adjustment rod 138 is reciprocatingly movable along the first direction between the fixing component 110 and the second outer needle 122, and during the movement of the second adjustment rod 138 along the first sub-direction, the second adjustment rod 138 can push the second outer needle 122 away from the first outer needle 121.

[0047] The first direction is Figure 2 The up and down directions in the second direction are Figure 2 The left and right directions in the first direction include a first sub-direction and a second sub-direction opposite to the first sub-direction. The first sub-direction is Figure 2 The second sub-direction is Figure 2 In the downward direction.

[0048] Initially, under the action of the first reset structure 132 and the second reset structure 136, the interval between the first outer needle 121 and the second outer needle 122 is at a minimum value, that is, the outer perimeter of the needle winding mechanism formed by the outer wall of the first outer needle 121 and the outer wall of the second outer needle 122 is at a minimum value, and the material strip is wound around the outer side of the first outer needle 121 and the second outer needle 122, and the first adjustment rod 134 and the second adjustment rod 138 push the first outer needle 121 and the second outer needle 122 away from each other, thereby adjusting the outer perimeter of the needle winding mechanism. After the material strip is wound, the first adjustment rod 134 and the second adjustment rod 138 can be moved along the second sub-direction, and under the action of the first reset structure 132 and the second reset structure 136, the first outer needle 121 and the second outer needle 122 will approach each other, so that the diaphragm of the inner layer of the wound battery cell is separated from the first outer needle 121 and the second outer needle 122, thereby facilitating the separation of the battery cell from the needle winding mechanism and preventing the diaphragm of the inner layer of the battery cell from being taken away or wrinkled.

[0049] By setting up the above-mentioned winding needle mechanism, when winding the battery cell, it is only necessary to cooperate with the first reset structure 132 with the first adjustment rod 134 and the second reset structure 136 with the second adjustment rod 138 to adjust the distance between the first outer needle 121 and the second outer needle 122, thereby adjusting the outer circumference of the winding needle mechanism. Compared with sticking Teflon sheets on the first outer needle 121 and the second outer needle 122, the outer circumference is adjusted by adjusting the distance between the first outer needle 121 and the second outer needle 122, and the adjustment speed is faster, which effectively shortens the operation time and improves production efficiency.

[0050] In addition, the needle winding mechanism can adjust the outer circumference only through the first reset structure 132 cooperating with the first adjustment rod 134 and the second reset structure 136 cooperating with the second adjustment rod 138, and has a simple structure and is easy to operate.

[0051] It should be noted that during the winding process of the battery cell, the tension of the material tape will apply pressure to the first outer needle 121 and the second outer needle 122 to approach each other, and the first reset structure 132 and the second reset structure 136 always provide a force for the first outer needle 121 and the second outer needle 122 to approach each other, that is, provide a pre-tightening force for the first outer needle 121 and the second outer needle 122 to approach each other, thereby ensuring that the first outer needle 121 and the second outer needle 122 provide stable support for the battery cell, and avoiding the first outer needle 121 and the second outer needle 122 being affected by the tension of the material tape and approaching each other during the winding process of the battery cell, causing fluctuations in the outer circumference of the winding needle mechanism.

[0052] In some embodiments, the needle winding mechanism also includes a first inner needle 123 and a second inner needle 124, the first inner needle 123 and the second inner needle 124 are both arranged longitudinally along the first direction, and the first outer needle 121, the first inner needle 123, the second inner needle 124 and the second outer needle 122 are arranged in sequence along the second direction, and the first inner needle 123 and the second inner needle 124 can approach and move away from each other.

[0053] The first adjustment assembly 131 further includes a third reset structure 133, which is connected between the fixing assembly 110 and the first inner needle 123 and is used to provide a force to move the first inner needle 123 away from the second inner needle 124. The first adjustment rod 134 can also push the first inner needle 123 closer to the second inner needle 124 during the movement along the first sub-direction.

[0054] The second adjustment assembly 135 further includes a fourth reset structure 137, which is connected between the fixing assembly 110 and the second inner needle 124 and is used to provide a force to move the second inner needle 124 away from the first inner needle 123. The second adjustment rod 138 can also push the second inner needle 124 to approach the first inner needle 123 during the movement along the first sub-direction.

[0055] Initially, under the action of the third reset structure 133 and the fourth reset structure 137, the first inner needle 123 and the second inner needle 124 are spaced apart from each other. At this time, the material strip can be inserted between the first inner needle 123 and the second inner needle 124, and then the first adjustment rod 134 and the second adjustment rod 138 are moved along the first sub-direction, so that the first adjustment rod 134 and the second adjustment rod 138 push the first inner needle 123 and the second inner needle 124 closer to each other to clamp the end of the material strip. The first adjustment rod 134 and the second adjustment rod 138 push the first inner needle 123 and the second inner needle 124 closer to each other and also push the first outer needle 121 and the second outer needle 122 away from each other, thereby adjusting the outer circumference of the needle winding mechanism. After the material strip is wound, the first adjustment rod 134 and the second adjustment rod 138 can be moved along the second sub-direction, and under the action of the third reset structure 133 and the fourth reset structure 137, the first inner needle 123 and the second inner needle 124 will move away from each other to loosen the end of the material strip.

[0056] In some embodiments, the fixing assembly 110 includes a needle winding seat 111, a first fixing rod 112 and a second fixing rod 113, the first fixing rod 112 and the second fixing rod 113 are both fixedly connected to the needle winding seat 111, the first inner needle 123 and the first outer needle 121 are both reciprocatably disposed on the first fixing rod 112 along the second direction, and the second inner needle 124 and the second outer needle 122 are both reciprocatably disposed on the second fixing rod 113 along the second direction.

[0057] It can be understood that the winding needle seat 111 is used to be connected to the driving device in a transmission manner. The driving device drives the winding needle seat 111 to rotate, thereby driving the inner needle and the outer needle to rotate to achieve the winding of the battery cell.

[0058] Furthermore, the third reset structure 133 is connected between the first fixed rod 112 and the first inner needle 123, the first reset structure 132 is connected between the first fixed rod 112 and the first outer needle 121, the fourth reset structure 137 is connected between the second fixed rod 113 and the second inner needle 124, the second reset structure 136 is connected between the second fixed rod 113 and the second outer needle 122, the first adjustment rod 134 is reciprocatably movably disposed along the first direction between the first fixed rod 112 and the first outer needle 121, and the second adjustment rod 138 is reciprocatably movably disposed along the first direction between the second fixed rod 113 and the second outer needle 122.

[0059] In some embodiments, the fixing assembly 110 also includes a first fixing block 1141 and a second fixing block 1142, both of which are fixedly connected to the winding needle seat 111, the first fixing rod 112 is fixedly connected to the first fixing block 1141, and the second fixing rod 113 is fixedly connected to the second fixing block 1142.

[0060] In some embodiments, the needle winding mechanism also includes a first elastic member 141 and a second elastic member 142. The first elastic member 141 is connected between the fixing assembly 110 and the first adjusting rod 134 to provide a force to move the first adjusting rod 134 along the second sub-direction. The second elastic member 142 is connected between the fixing assembly 110 and the second adjusting rod 138 to provide a force to move the second adjusting rod 138 along the second sub-direction.

[0061] Furthermore, the fixing assembly 110 also includes a first connecting seat 1151 and a second connecting seat 1152, the first connecting seat 1151 is fixedly connected to the first fixing rod 112, the first elastic member 141 is connected between the first connecting seat 1151 and the first adjusting rod 134, the second connecting seat 1152 is fixedly connected to the second fixing rod 113, and the second elastic member 142 is connected between the second connecting seat 1152 and the second adjusting rod 138.

[0062] In actual application, the first connecting seat 1151 and the first fixed rod 112 enclose a first accommodating space 1153, one end of the first adjusting rod 134 extends into the first accommodating space 1153, and the first elastic member 141 is arranged in the first accommodating space 1153; the second connecting seat 1152 and the second fixed rod 113 enclose a second accommodating space 1154, one end of the second adjusting rod 138 extends into the second accommodating space 1154, and the second elastic member 142 is arranged in the second accommodating space 1154.

[0063] In some embodiments, the fixing assembly 110 also includes a first limit member 1161 and a second limit member 1162, the first limit member 1161 is connected to the first fixing rod 112, the second limit member 1162 is connected to the second fixing rod 113, the first reset structure 132 is connected between the first limit member 1161 and the first outer needle 121, and the second reset structure 136 is connected between the second limit member 1162 and the second outer needle 122.

[0064] In actual applications, the first adjusting rod 134 and the second adjusting rod 138 are both provided with a avoidance hole 139 extending longitudinally along the first direction, one end of the first limiting member 1161 passes through the first outer needle 121 and the avoidance hole 139 of the first adjusting rod 134, and is connected to the first fixed rod 112, one end of the second limiting member 1162 passes through the second outer needle 122 and the avoidance hole 139 of the second adjusting rod 138, and is connected to the second fixed rod 113, when the first adjusting rod 134 and the second adjusting rod 138 move along the first direction, the first limiting member 1161 and the second limiting member 1162 move in the corresponding avoidance holes 139 relative to the first adjusting rod 134 and the second adjusting rod 138 respectively.

[0065] In addition, the avoidance hole 139 can also limit the movement range of the first adjustment rod 134 and the second adjustment rod 138 .

[0066] Specifically, the first limiting member 1161 and the second limiting member 1162 are both limiting screws.

[0067] In some embodiments, the first limit member 1161 and the second limit member 1162 each include two, and correspondingly, the first reset structure 132 and the second reset structure 136 each include two, the two first limit members 1161 are arranged corresponding to the two ends of the first outer needle 121, and the two second limit members 1162 are arranged corresponding to the two ends of the second outer needle 122, each first limit member 1161 is correspondingly provided with a first reset structure 132, and each second limit member 1162 is correspondingly provided with a second reset structure 136, so as to stably provide a force to bring the first outer needle 121 and the second outer needle 122 closer to each other.

[0068] In some embodiments, the fixing assembly 110 also includes a first pressing block 1171 and a second pressing block 1172, the first pressing block 1171 is fixedly connected to the first fixing rod 112, the second pressing block 1172 is fixedly connected to the second fixing rod 113, the third reset structure 133 is connected between the first pressing block 1171 and the first inner needle 123, and the fourth reset structure 137 is connected between the second pressing block 1172 and the second inner needle 124.

[0069] Furthermore, the first pressing block 1171 includes two, and the first inner needle 123 is reciprocably arranged on the first fixed rod 112 along the second direction. The two first pressing blocks 1171 are arranged corresponding to the two ends of the first inner needle 123, and each first pressing block 1171 and the first fixed rod 112 are enclosed to form a first adjustment space, and the two ends of the first inner needle 123 extend into the first adjustment space. A third composite structure 133 is arranged in each first adjustment space, and one end of the third reset structure 133 abuts against the first pressing block 1171, and the other end abuts against the first inner needle 123.

[0070] The second pressing block 1172 includes two, and the second inner needle 124 is reciprocatingly movably arranged on the second fixed rod 113 along the second direction. The two second pressing blocks 117 are arranged corresponding to the two ends of the second inner needle 124, and each second pressing block 1172 and the second fixed rod 113 are enclosed to form a second adjustment space, and the two ends of the second inner needle 124 extend into the second adjustment space. A fourth reset structure 137 is arranged in each second adjustment space, and one end of the fourth reset structure 137 abuts against the second pressing block 1172, and the other end abuts against the second inner needle 124.

[0071] It should be noted that, in this embodiment, the first limiter 1161 and the first pressing block 1171 are located on opposite sides of the first fixing rod 112 along the second direction, and the second limiter 1162 and the second pressing block 1172 are located on opposite sides of the second fixing rod 113 along the second direction.

[0072] In some embodiments, the needle winding mechanism also includes a first adjustment block 151, which is arranged on the first inner needle 123. The first adjustment rod 134 is provided with a first mating bevel 1341. During the movement of the first adjustment rod 134 along the first sub-direction, the first adjustment block 151 can slide on the first mating bevel 1341 to make the first inner needle 123 close to the second inner needle 124.

[0073] It can be understood that under the action of the third reset structure 133, when the first adjustment rod 134 moves along the first sub-direction, the first adjustment block 151 connected to the first inner needle 123 can always abut against the first mating bevel 1341, thereby making the first inner needle 123 close to the second inner needle 124.

[0074] In actual application, a through hole is opened on the first fixed rod 112, and a first embedding hole is opened on the first inner needle 123. The first adjusting block 151 is passed through the through hole and embedded in the first embedding hole. When the first adjusting rod 134 moves along the first direction, the first adjusting block 151 can be pushed to move in the through hole along the second direction, thereby pushing the first inner needle 123 to move along the second direction.

[0075] It should be explained that, in the present embodiment, the first adjustment block 151 is connected to the first inner needle 123 by snap-fitting. In other embodiments, the first adjustment block 151 may also be connected to the first inner needle 123 by screw locking or other methods.

[0076] Specifically, the number of the first adjustment blocks 151 includes at least two, and the number of the corresponding through holes and the first embedding holes includes at least two, so as to ensure that the first adjustment rod 134 stably pushes the first inner needle 123 close to the second inner needle 124 during the movement along the first sub-direction.

[0077] In some embodiments, the needle winding mechanism also includes a second adjustment block 152, which is arranged on the first outer needle 121. The first adjustment rod 134 is provided with a second mating bevel 1342. During the movement of the first adjustment rod 134 along the first sub-direction, the first adjustment block 151 can slide on the second mating bevel 1342 to move the first outer needle 121 away from the second outer needle 122.

[0078] Similarly, it can be known that under the action of the first reset structure 132 , when the first adjustment rod 134 moves along the first sub-direction, the second adjustment block 152 can always abut against the second matching inclined surface 1342 .

[0079] In practical applications, a second embedding hole is formed on the first outer needle 121, and the second adjusting block 152 is embedded in the second embedding hole.

[0080] It can be understood that both the first adjustment block 151 and the second adjustment block 152 are provided with inclined surfaces, and the first matching inclined surface 1341 and the second matching inclined surface 1342 can be matched with the inclined surface on the first adjustment block 151 and the inclined surface on the second adjustment block 152 respectively.

[0081] In some embodiments, the needle winding mechanism also includes a third adjustment block 153, which is arranged on the second inner needle 124. The second adjustment rod 138 is provided with a third mating bevel 1381. During the movement of the second adjustment rod 138 along the first sub-direction, the third adjustment block 153 can slide on the third mating bevel 1381 to make the second inner needle 124 close to the first inner needle 123.

[0082] In actual application, a through hole is opened on the second fixed rod 113, and a third embedding hole is opened on the second inner needle 124. The third adjustment block 153 is passed through the through hole and embedded in the third embedding hole. When the second adjustment rod 138 moves along the first direction, the third adjustment block 153 can be pushed to move in the through hole along the second direction, thereby pushing the second inner needle 124 to move along the second direction.

[0083] In some embodiments, the needle winding mechanism also includes a fourth adjustment block 154, which is disposed on the second outer needle 122, and a fourth mating bevel 1382 is provided on the second adjustment rod 138. During the movement of the second adjustment rod 138 along the first sub-direction, the fourth adjustment block 154 can slide on the fourth mating bevel 1382 to move the second outer needle 122 away from the first outer needle 121.

[0084] In actual application, a fourth embedding hole is formed on the second outer needle 122, and the fourth adjusting block 154 is embedded in the fourth embedding hole.

[0085] It can be understood that the connection method of the first inner needle 123, the first adjustment block 151, the first outer needle 121 and the second adjustment block 152 and the cooperation method with the first adjustment rod 134 are the same as the connection method of the second inner needle 124, the third adjustment block 153, the second outer needle 122 and the fourth adjustment block 154 and the cooperation method with the second adjustment rod 1233.

[0086] In some embodiments, the first adjustment rod 134 may sequentially pass through the first separation position and the first contact position during movement along the first sub-direction, and the second adjustment rod 138 may sequentially pass through the second separation position and the second contact position during movement along the first sub-direction.

[0087] When the first adjustment rod 134 moves to the first separation position along the first sub-direction, the first adjustment block 151 slides out from the first matching slope 1341 ; when the first adjustment rod 134 moves to the first contact position along the first sub-direction, the second adjustment block 152 slides into the second matching slope 1342 .

[0088] When the second adjustment rod 138 moves to the second separation position along the first sub-direction, the third adjustment block 153 slides out from the third matching slope 1381; when the second adjustment rod 138 moves to the second contact position along the first sub-direction, the fourth adjustment block 154 slides into the fourth matching slope 1382.

[0089] In this way, during the movement of the first adjusting rod 134 and the second adjusting rod 138 along the first sub-direction, the first adjusting block 151 and the third adjusting block 153 first slide on the first mating bevel 1341 and the third mating bevel 1381 respectively, and after sliding out of the first mating bevel 1341 and the third mating bevel 1381 respectively, the second adjusting block 152 and the fourth adjusting block 154 will slide into the second mating bevel 1342 and the fourth mating bevel 1382 respectively, that is to say, after the first inner needle 123 and the second inner needle 124 clamp the end of the material strip, the distance between the first outer needle 121 and the second outer needle 122 is adjusted, that is, the outer circumference of the needle winding mechanism is adjusted.

[0090] In some embodiments, the needle winding mechanism also includes a first connecting block 125 and a second connecting block 126, and the first connecting block 125 and the second connecting block 126 are both reciprocatably arranged in the fixing assembly 110 along the second direction, and the first connecting block 125, the first inner needle 123, the second inner needle 124 and the second connecting block 126 are arranged in sequence, the first outer needle 121 is fixedly connected to the side of the first connecting block 125 away from the first inner needle 123, the first adjusting rod 134 is reciprocatably arranged in the first direction between the first fixing rod 112 and the first connecting block 125, the second outer needle 122 is fixedly connected to the side of the second connecting block 126 away from the second inner needle 124, the second adjusting rod 138 is reciprocatably arranged in the first direction between the second fixing rod 113 and the second connecting block 126, the first reset structure 132 is connected between the fixing assembly 110 and the first connecting block 125, and the second reset structure 136 is connected between the fixing assembly 110 and the second connecting block 126.

[0091] In actual application, the first connecting block 125 is reciprocatably disposed on the first fixing rod 112 along the second direction, the second embedding hole is opened in the first connecting block 125, the second connecting block 126 is reciprocatably disposed on the second fixing rod 113 along the second direction, and the fourth embedding hole is opened in the second connecting block 126.

[0092] In some embodiments, the needle winding mechanism also includes a plurality of third elastic members 143, which are arranged between the first adjusting block 151 and the first inner needle 123 and between the third adjusting block 153 and the second inner needle 124, and are used to provide a force to move the first adjusting block 151 away from the first inner needle 123 and the third adjusting block 153 away from the second inner needle 124, so that when the first adjusting rod 134 pushes the first adjusting block 151 and the second adjusting rod 138 pushes the third adjusting block 153 to move along the second direction, it ensures that the first adjusting block 151 and the second adjusting block 153 have a movable margin to avoid the first adjusting rod 134 and the second adjusting rod 138 from getting stuck due to processing errors, and also ensures that the first inner needle 123 and the second inner needle 124 have a movable margin to avoid the first inner needle 123 and the second inner needle 124 from being clamped too tightly due to processing errors, thereby avoiding damage to the material strip.

[0093] Specifically, the third elastic member 143 is a butterfly spring.

[0094] In some embodiments, one end of the first adjustment rod 134 and the second adjustment rod 138 away from the needle winding seat 111 along the first direction protrudes from the first outer needle 121 and the second outer needle 122, and one end of the first fixed rod 112 and the second fixed rod 113 away from the needle winding seat 111 along the first direction protrudes from the first adjustment rod 134 and the second adjustment rod 138.

[0095] The present invention further provides a winding device, which includes the winding needle mechanism 100 in the above embodiment.

[0096] See also Figure 3-Figure 5 In some embodiments, the winding device also includes a driving mechanism 200, which includes a driving assembly 210, a support member 221 and a tail stock 222. The driving assembly 210 is used to push the support member 221 to move along the first sub-direction. The tail stock 222 is rotatably arranged on the support member 221 around a rotation axis parallel to the first direction, and the tail stock 222 is detachably connected to the fixing assembly 110. The tail stock 222 can abut against the first adjusting rod 134 and the second adjusting rod 138 during the movement of the support member 221 along the first sub-direction to push the first adjusting rod 134 and the second adjusting rod 138 to move along the first sub-direction.

[0097] In this way, the driving component 210 drives the tail stock 222 to move along the first sub-direction so that the tail stock 222 can be connected to the fixing component 110, and then the driving component 210 continues to drive the tail stock 222 to move along the first sub-direction to push the first adjusting rod 134 and the second adjusting rod 138 to move along the first sub-direction, so that the first inner needle 123 and the second inner needle 124 clamp the material strip, and adjust the distance between the first outer needle 121 and the second outer needle 122, that is, adjust the outer circumference of the needle winding mechanism.

[0098] It can be understood that the first direction is Figure 3 The left and right directions in , and the first sub-direction is Figure 3 The direction to the right in the middle, the second sub-direction is Figure 3 In the direction of left.

[0099] Furthermore, the tail stock 222 is detachably connected to one end of the first fixed rod 112 and the second fixed rod 113 away from the needle winding seat 111, and the tail stock 222 can reciprocate along the first direction on the first fixed rod 112 and the second fixed rod 113, so that when the tail stock 222 moves on the first fixed rod 112 and the second fixed rod 113, it abuts against one end of the first adjustment rod 134 and the second adjustment rod 138 away from the needle winding seat 111.

[0100] In actual application, the driving mechanism also includes a clamping member 223, which is connected to the tailstock 222 to form a clamping groove 2221 together with the tailstock 222, and one end of the first fixing rod 112 and the second fixing rod 113 away from the winding needle seat 111 extends into the clamping groove 2221 and is clamped.

[0101] It can be understood that the slot 2221 is an annular slot to facilitate the first fixing rod 112 and the second fixing rod 113 to extend therein.

[0102] In some embodiments, the driving mechanism further includes a connecting rod 224, the driving assembly 210 is disposed on the connecting rod 224, and the support member 221 is reciprocatably connected to the connecting rod 224 along the first direction. In practical applications, the driving mechanism further includes a bracket 225, the bracket 225 is fixedly connected to the connecting rod 224, and the support member 221 is reciprocatably connected to the bracket 225 along the first direction.

[0103] In some embodiments, the driving assembly 210 includes a driving member 211 and a driving rod 212. The driving member 211 is disposed on the connecting rod 224, and the driving rod 212 is reciprocatably disposed on the connecting rod 224 along a first direction. The driving member 211 is transmission-connected to the driving rod 212 to drive the driving rod 212 to reciprocate along the first direction, and the driving rod 212 can abut against the supporting member 221 during the movement along the first sub-direction, thereby pushing the supporting member 221 to move along the first sub-direction.

[0104] In actual applications, the driving assembly 210 also includes a driving base 213, a screw 214, a nut and a driving block 215. The driving base 213 is fixedly connected to the connecting rod 224. The driving member 211 is arranged on the driving base 213 and is transmission-connected to the screw 214 through a coupling. The screw 214 is threadedly connected to the nut, the nut is fixedly connected to the driving block 215, and the driving block 215 is fixedly connected to the driving rod 212.

[0105] In some embodiments, the driving mechanism further includes a fourth elastic member 226 , which is connected between the bracket 225 and the support member 221 to provide a force for moving the support member 221 along the second sub-direction, thereby resetting the support member 221 .

[0106] In actual application, the driving mechanism also includes a push block 227, which is fixedly connected to the support member 221, and a fourth elastic member 226 is connected between the push block 227 and the bracket 225. The driving rod 212 can abut against the push block 227 during the movement along the first sub-direction.

[0107] In some embodiments, the driving mechanism also includes a braking assembly, which is constructed to controllably limit the movement of the support member 221 along the first direction, so that after the driving assembly 210 drives the tail stock 222 to push the first adjusting rod 134 and the second adjusting rod 138 to move to a preset position, the braking assembly is actuated to limit the movement of the support member 221 along the first direction, and then limit the movement of the tail stock 222 along the first direction, so that the first adjusting rod 134 and the second adjusting rod 138 are relatively fixed, thereby avoiding the displacement of the first inner needle 123, the second inner needle 124, the first outer needle 121 and the second outer needle 122 during the winding process of the battery cell, ensuring the clamping of the ends of the material strip and ensuring the accuracy of the outer circumference.

[0108] In actual application, the braking assembly includes a fixing ring 228, a brake 229 and a clamp 231. The fixing ring 228 is fixedly connected to the connecting rod 224, the brake 229 is arranged on the fixing ring 228, the clamp 231 is fixedly connected to the support member 221, and the brake 229 is constructed to controllably clamp the clamp 231 so that the clamp 231 is fixed relative to the connecting rod 224.

[0109] Specifically, the clamping block 231 is fixedly connected to the pushing block 227 .

[0110] In some embodiments, the driving mechanism further includes a sleeve 232 , which is fixedly connected to the bracket 225 , the support member 221 is reciprocatably disposed in the sleeve 232 along the first direction, and the tailstock 222 is rotatably connected to the support member 221 via a bearing.

[0111] In some embodiments, the driving mechanism also includes a buffer member 233, which is disposed on the support member 221. When the support member 221 moves along the second sub-direction, the buffer member 233 moves with the support member 221 and abuts against the sleeve 232 to avoid a large impact between the support member 221 and the sleeve 232.

[0112] In some embodiments, the first reset structure 132, the second reset structure 136, the third reset structure 133, and the fourth reset structure 137 are all elastic structures. In practical applications, the first reset structure 132, the second reset structure 136, the third reset structure 133, the fourth reset structure 137, the first elastic member 141, the second elastic member 142, and the fourth elastic member 226 are all springs.

[0113] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A needle winding mechanism, characterized in that: It includes a fixing assembly, a first outer needle, a second outer needle, a first adjusting assembly and a second adjusting assembly; The first outer needle and the second outer needle are both arranged longitudinally along a first direction, and are arranged at intervals along a second direction perpendicular to the first direction, and the first outer needle and the second outer needle can approach and move away from each other; The first adjustment assembly includes a first reset structure and a first adjustment rod, the first reset structure is connected between the fixing assembly and the first outer needle, and is used to provide a force to make the first outer needle approach the second outer needle, the first adjustment rod is reciprocatingly disposed between the fixing assembly and the first outer needle along the first direction, and during the movement of the first adjustment rod along a first sub-direction of the first direction, the first adjustment rod can push the first outer needle away from the second outer needle; The second adjustment component includes a second reset structure and a second adjustment rod. The second reset structure is connected between the fixing component and the second outer needle, and is used to provide a force to make the second outer needle approach the first outer needle. The second adjustment rod is reciprocatingly movable along the first direction between the fixing component and the second outer needle, and during the movement of the second adjustment rod along the first sub-direction, the second adjustment rod can push the second outer needle away from the first outer needle.

2. The needle winding mechanism according to claim 1, characterized in that: The needle winding mechanism further includes a first inner needle and a second inner needle, the first inner needle and the second inner needle are both arranged longitudinally along the first direction, the first outer needle, the first inner needle, the second inner needle and the second outer needle are sequentially arranged at intervals along the second direction, and the first inner needle and the second inner needle can approach and move away from each other; The first adjustment component further includes a third reset structure, which is connected between the fixing component and the first inner needle and is used to provide a force to move the first inner needle away from the second inner needle, and the first adjustment rod can also push the first inner needle closer to the second inner needle during the movement of the first sub-direction; The second adjustment component also includes a fourth reset structure, which is connected between the fixing component and the second inner needle, and is used to provide a force to move the second inner needle away from the first inner needle. The second adjustment rod can also push the second inner needle closer to the first inner needle during the movement of the first sub-direction.

3. The needle winding mechanism according to claim 2, characterized in that: The fixing assembly includes a needle rolling seat, a first fixing rod and a second fixing rod, wherein the first fixing rod and the second fixing rod are both fixedly connected to the needle rolling seat, the first inner needle and the first outer needle are arranged on the first fixing rod, and the second inner needle and the second outer needle are arranged on the second fixing rod; The third reset structure is connected to the first fixed rod and the first inner needle, the first reset structure is connected between the first fixed rod and the first outer needle, the fourth reset structure is connected between the second fixed rod and the second inner needle, the second reset structure is connected between the second fixed rod and the second outer needle, the first adjusting rod is reciprocatably disposed between the first fixed rod and the first outer needle along the first direction, and the second adjusting rod is reciprocatably disposed between the second fixed rod and the second outer needle along the first direction.

4. The needle winding mechanism according to claim 3, characterized in that: The fixing assembly also includes a first limit member and a second limit member, the first limit member is connected to the first fixing rod, the first reset structure is connected between the first limit member and the first outer needle, the second limit member is connected to the second fixing rod, and the second reset structure is connected between the second limit member and the second outer needle.

5. The needle winding mechanism according to claim 4, characterized in that: The fixing assembly also includes a first pressing block and a second pressing block, the first pressing block is fixedly connected to the first fixing rod, the third reset structure is connected between the first pressing block and the first inner needle, the second pressing block is fixedly connected to the second fixing rod, and the fourth reset structure is connected between the second pressing block and the second inner needle.

6. The needle winding mechanism according to claim 2, characterized in that: The needle winding mechanism further includes a first adjusting block and a third adjusting block, wherein the first adjusting block is arranged on the first inner needle, and the first adjusting rod is provided with a first matching inclined surface, and during the movement of the first adjusting rod along the first sub-direction, the first adjusting block can slide on the first matching inclined surface to make the first inner needle close to the second inner needle; The third adjustment block is arranged on the second inner needle, and the second adjustment rod is provided with a third matching inclined surface. During the movement of the second adjustment rod along the first sub-direction, the third adjustment block can slide on the third matching inclined surface to make the second inner needle close to the first inner needle.

7. The needle winding mechanism according to claim 6, characterized in that: The needle winding mechanism further includes a second adjusting block and a fourth adjusting block, wherein the second adjusting block is arranged on the first outer needle, and the first adjusting rod is provided with a second matching inclined surface, and the second adjusting block can slide on the second matching inclined surface during the movement of the first adjusting rod along the first sub-direction, so as to make the first outer needle away from the second outer needle; The fourth adjustment block is arranged on the second outer needle, and the second adjustment rod is provided with a fourth matching inclined surface. During the movement of the second adjustment rod along the first sub-direction, the fourth adjustment block can slide on the fourth matching inclined surface to make the second outer needle move away from the first outer needle.

8. The needle winding mechanism according to claim 7, characterized in that: The first adjusting rod may sequentially pass through a first separation position and a first contact position during the movement along the first sub-direction, and the second adjusting rod may sequentially pass through a second separation position and a second contact position during the movement along the first sub-direction; When the first adjusting rod moves along the first sub-direction to the first separation position, the first adjusting block slides out from the first matching inclined surface; When the first adjusting rod moves along the first sub-direction to the first contact position, the second adjusting block slides into the second matching inclined surface; When the second adjusting rod moves along the first sub-direction to the second separation position, the third adjusting block slides out from the third matching inclined surface; When the second adjusting rod moves to the second contact position along the first sub-direction, the fourth adjusting block slides into the fourth matching inclined surface.

9. The needle winding mechanism according to claim 1, characterized in that: The needle winding mechanism also includes a first elastic member and a second elastic member. The first elastic member is connected between the fixed assembly and the first adjusting rod to provide a force to move the first adjusting rod along a second sub-direction opposite to the first sub-direction. The second elastic member is connected between the fixed assembly and the second adjusting rod to provide a force to move the second adjusting rod along the second sub-direction.

10. A winding device, characterized in that: It comprises the needle winding mechanism described in any one of claims 1 to 9.

11. The winding device according to claim 10, characterized in that The winding device also includes a driving mechanism, which includes a driving assembly, a support member and a tail stock. The driving assembly is used to push the support member to move along the first sub-direction. The tail stock is rotatably arranged on the support member around a rotation axis parallel to the first direction. The tail stock is detachably connected to the fixing assembly, and the tail stock can abut against the first adjusting rod and the second adjusting rod during the process of the support member moving along the first sub-direction to push the first adjusting rod and the second adjusting rod to move along the first sub-direction.

12. The winding device according to claim 11, characterized in that The driving mechanism also includes a bracket and a fourth elastic member. The support member is connected to the bracket so as to be reciprocatingly movable along a first direction. The fourth elastic member is connected between the bracket and the support member to provide a force for moving the support member along a second sub-direction opposite to the first sub-direction.

13. The winding device according to claim 11, characterized in that The driving mechanism also includes a connecting rod and a brake assembly. The support member is connected to the connecting rod so as to be reciprocatingly movable along the first direction. The brake assembly includes a fixing ring, a brake and a clamping block. The fixing ring is fixedly connected to the connecting rod, the brake is fixedly connected to the fixing ring, the clamping block is fixedly connected to the support member, and the brake is constructed to controllably clamp the clamping block.

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