Pole tab smoothing mechanism, roller assembly and pole piece unwinding device

Abstract

The present invention relates to a pole lug smoothing mechanism, a roller assembly and a pole piece unwinding device, wherein the pole lug smoothing mechanism comprises a rotating assembly and a counterweight assembly. When the diameter of the pole piece roll on the unwinding shaft changes and causes the wrap angle between the pole piece strip and the roller to change, the swing frame can drive the abutment member to swing with the pole piece strip so that the abutment member always keeps in contact with the pole piece strip. Since the relative positions of the swing frame, the abutment member and the smoothing member are fixed, when the abutment member keeps in contact with the pole piece strip, the angle at which the pole piece strip passes through the smoothing member will not change. Therefore, the pole piece strip can always pass through the smoothing member at a preset angle, thereby improving the effect of smoothing the pole lug during the unwinding process.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery equipment, and in particular to a pole lug smoothing mechanism, a roller assembly and a pole piece unwinding device. Background Art

[0002] Due to the influence of various factors during the unwinding process of the pole piece, the pole ear is prone to folding, which affects the subsequent production efficiency and product quality. In order to avoid the problem of pole ear folding during unwinding, a smoothing plate is generally set at the first roller of the pole piece to guide and smooth the pole ear. However, the diameter of the pole piece roll will change in real time during the unwinding process, causing the pole piece's running direction to change continuously, while the angle of the smoothing plate is usually fixed, which makes it impossible for the pole piece to always pass through the smoothing plate at a suitable angle, resulting in poor smoothing effect on the pole ear or even failure of smoothing. Summary of the invention

[0003] Based on this, it is necessary to provide a tab smoothing mechanism, a roller assembly and a pole piece unwinding device that can improve the tab smoothing effect during the unwinding process in order to address the above-mentioned problems.

[0004] A tab smoothing mechanism, comprising:

[0005] A rotating assembly includes a swing frame, a supporting member and a smoothing member, wherein the swing frame is rotatably arranged around a swing axis, and the supporting member and the smoothing member are both installed on the swing frame; and

[0006] A counterweight assembly is connected to the swing frame.

[0007] In one embodiment, the swing frame includes a first swing arm and a second swing arm, the first swing arm and the second swing arm are arranged at intervals along the extension direction of the swing axis and can rotate synchronously around the swing axis, and the supporting member and the smoothing member are distributed between the first swing arm and the second swing arm.

[0008] In one embodiment, the abutting member is a pressure roller rotatably mounted on the swing frame, and the rotation axis of the pressure roller is parallel to the swing axis.

[0009] In one of the embodiments, the position of the smoothing member on the swing frame is adjustable along a direction parallel to the swing axis.

[0010] In one of the embodiments, the first torque applied to the swing frame by the gravity of the counterweight assembly is in opposite direction to the second torque applied to the swing frame by the gravity of the rotating assembly; the swing frame can drive the abutment member to abut against the pole piece strip passing through the pole ear smoothing mechanism under the joint action of the first torque and the second torque, and make the pole piece strip pass through the smoothing member at a preset angle.

[0011] In one embodiment, the counterweight assembly includes a basic counterweight block and an adjustable counterweight block, and the adjustable counterweight block is capable of adjusting the magnitude of the first torque.

[0012] In one embodiment, the adjustable counterweight can adjust the first torque to offset the second torque, or make the sum of the first torque and the second torque smaller than a preset value.

[0013] In one of the embodiments, a positioning assembly is further included, wherein the positioning assembly can lock the swing frame and prevent the swing frame in a locked state from rotating around the swing axis.

[0014] In one of the embodiments, a mounting seat is further included, and the swing frame is rotatably mounted on the mounting seat around the swing axis. The positioning assembly includes an arc-shaped positioning plate fixed to the swing frame and a dividing pin installed on the mounting seat. The swing axis passes through the center of the arc-shaped positioning plate, and a plurality of positioning holes are opened along the extension direction of the arc-shaped positioning plate. The dividing pin can be inserted into any of the positioning holes to lock the swing frame.

[0015] In one of the embodiments, a mounting seat is further included, and the swing frame is rotatably mounted on the mounting seat around the swing axis.

[0016] A roller assembly comprises a roller and a tab smoothing mechanism as described in any one of the preferred embodiments above, wherein the swing axis is consistent with the extension direction of the rotation axis of the roller.

[0017] In one of the embodiments, the roller is mounted on a fixed mandrel and is rotatable around the axis of the fixed mandrel, the tab smoothing mechanism is mounted on the fixed mandrel, and the swing axis is made to coincide with the rotation axis of the roller.

[0018] In one embodiment, the swing frame is disposed on the fixed spindle.

[0019] In one embodiment, the tab smoothing mechanism includes a mounting seat, the mounting seat includes a fixing ring and a mounting plate connected to the fixing ring, the fixing ring is sleeved and fixed on the fixed core shaft, the mounting plate has a fixing hole concentric with the fixed core shaft, the rotating assembly includes a driving shaft fixedly connected to the swing frame, and the driving shaft is rotatably mounted in the fixing hole through a bearing.

[0020] In one of the embodiments, a mounting bracket is further included, and the swing frame is mounted on the mounting bracket so that the swing axis coincides with the rotation axis of the roller.

[0021] A pole piece unwinding device comprises an unwinding shaft and a roller assembly as described in any one of the preferred embodiments above; wherein the pole ear smoothing mechanism is located between the unwinding shaft and the roller, and the swing axis is consistent with the extension direction of the rotation axis of the roller and the unwinding shaft.

[0022] In one embodiment, the supporting member is a pressure roller rotatably mounted on the swing frame, the unwinding shaft rotates in a clockwise direction to unwind the pole piece strip, the passing roller rotates in a clockwise direction driven by the pole piece strip, and the pressure roller rotates in a clockwise or counterclockwise direction driven by the pole piece strip.

[0023] In one embodiment, the supporting member is a pressure roller rotatably mounted on the swing frame, the unwinding shaft rotates in a clockwise direction to unwind the pole piece strip, the passing roller rotates in a counterclockwise direction driven by the pole piece strip, and the pressure roller rotates in a clockwise or counterclockwise direction driven by the pole piece strip.

[0024] In one embodiment, the supporting member is a pressure roller rotatably mounted on the swing frame, the unwinding shaft rotates counterclockwise to unwind the pole piece strip, the passing roller rotates clockwise under the drive of the pole piece strip, and the pressure roller rotates clockwise or counterclockwise under the drive of the pole piece strip.

[0025] In one embodiment, the supporting member is a pressure roller rotatably mounted on the swing frame, the unwinding shaft rotates counterclockwise to unwind the pole piece strip, the passing roller rotates counterclockwise under the drive of the pole piece strip, and the pressure roller rotates clockwise or counterclockwise under the drive of the pole piece strip.

[0026] The above-mentioned pole ear smoothing mechanism, roller assembly and pole piece unwinding device, when the diameter of the pole piece roll on the unwinding shaft changes and causes the wrap angle between the pole piece strip and the roller to change, the swing frame can drive the abutment to swing with the pole piece strip, so that the abutment always keeps in contact with the pole piece strip. Since the relative positions of the swing frame, the abutment and the smoothing member are fixed, the angle at which the pole piece strip passes through the smoothing member will not change when the abutment and the pole piece strip keep in contact. Therefore, the pole piece strip can always pass through the smoothing member at a preset angle, thereby improving the effect of smoothing the pole ear during the unwinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 It is a simplified schematic diagram of the structure of a pole piece unwinding device in one embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the position relationship between the tab smoothing mechanism and the roller under one position working condition;

[0030] Figure 3 It is a schematic diagram of the position relationship between the tab smoothing mechanism and the roller under another position working condition;

[0031] Figure 4 It is a front view of a tab smoothing mechanism in one embodiment of the present invention;

[0032] Figure 5 for Figure 4 A right side view of the tab smoothing mechanism shown;

[0033] Figure 6 for Figure 4 The back side schematic diagram of the tab smoothing mechanism shown;

[0034] Figure 7 for Figure 4 Schematic diagram of the functional relationship between the smoothing member and the pole piece strip in the pole lug smoothing mechanism shown. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] See also Figure 1 The present invention provides a pole piece unwinding device 10 and a pole tab smoothing mechanism 100. The pole piece unwinding device 10 comprises a pole tab smoothing mechanism 100, an unwinding shaft 200 and a roller 300.

[0042] The pole sheet roll 20 can be pre-loaded on the unwinding shaft 200, and the unwinding shaft 200 unwinds a continuous pole sheet strip 30 in sequence. After the pole sheet strip 20 is wound around the roller 300 and guided by the roller 300, it can be transported to the next process along a preset direction. The tab smoothing mechanism 100 is located between the unwinding shaft 200 and the roller 300. The pole sheet strip 30 unwound from the unwinding shaft 200 will first pass through the tab smoothing mechanism 100 before winding around the roller 300, and the tab smoothing mechanism 100 will smooth the tab 31 that is folded at the edge of the pole sheet strip 30.

[0043] like Figure 1 As shown, the unwinding shaft 200 in this embodiment rotates counterclockwise to unwind the pole piece material strip, and the over roller 300 rotates counterclockwise driven by the pole piece material strip. Obviously, in other embodiments, according to the difference in the relative positions of the unwinding shaft 200 and the over roller 300, and the different directions in which the pole piece material strip 30 is threaded on the over roller 300, the rotation directions of the unwinding shaft 200 and the over roller 300 also exist in other situations.

[0044] For example, the unwinding shaft 200 rotates in a counterclockwise direction to unwind the pole piece strip 30, and the over roller 300 rotates in a clockwise direction driven by the pole piece strip 30. Alternatively, the unwinding shaft 200 rotates in a clockwise direction to unwind the pole piece strip 30, and the over roller 300 rotates in a clockwise direction driven by the pole piece strip 30. Alternatively, the unwinding shaft 200 rotates in a clockwise direction to unwind the pole piece strip 30, and the over roller 300 rotates in a counterclockwise direction driven by the pole piece strip 30. As the unwinding process continues, the diameter of the pole piece strip 20 will gradually decrease, causing the wrap angle between the pole piece strip 30 and the over roller 300 to continuously change. In order to ensure that the pole tab 31 is smoothly smoothed, the pole tab smoothing mechanism 100 in the present application is designed to be able to dynamically adjust along the running direction of the pole sheet material strip 30 so that the pole sheet material strip 30 can always pass through the pole tab smoothing mechanism 100 at a preset angle.

[0045] It should be noted that the present invention also provides a roller assembly (not shown), which includes a tab smoothing mechanism 100 and a roller 300. The tab smoothing mechanism 100 and the roller 300 can be integrated and can be used as a whole to cooperate with different unwinding shafts 200 to realize the unwinding of the pole sheet strip 30.

[0046] Please also refer to 4 to Figure 6 In one embodiment of the present invention, a tab smoothing mechanism 100 includes a rotating assembly 110 and a counterweight assembly 120 .

[0047] The rotating assembly 110 includes a swing frame 111, a supporting member 112 and a smoothing member 113, and the supporting member 112 and the smoothing member 113 are both mounted on the swing frame 111. The swing frame 111 plays a supporting role and can be formed of a metal material. The swing frame 111 is rotatably arranged around a swing axis, and the swing frame 111 can drive the supporting member 112 and the smoothing member 113 to rotate synchronously by rotating around the swing axis.

[0048] The swing axis is consistent with the extending direction of the rotation axis of the roller 300 and the unwinding shaft 200. Specifically in this embodiment, the unwinding shaft 200 is mounted on the fixed mandrel 310 and can rotate around the axis of the fixed mandrel 310, and the tab smoothing mechanism 100 is mounted on the fixed mandrel 310, and the swing axis coincides with the rotation axis of the roller 300. In other words, the tab smoothing mechanism 100 and the roller 300 share the fixed mandrel 310 as a supporting structure, which can make the overall structure more compact.

[0049] More specifically, the swing frame 111 is also disposed on the fixed mandrel 310 and can rotate around the axis of the fixed mandrel 310, so that the swing axis coincides with the rotation axis of the roller 300. The swing frame 111 can be directly mounted on the fixed mandrel 310, or indirectly mounted on the fixed mandrel 310 through other elements.

[0050] Of course, in other embodiments, the swing frame 111 can also be installed through another mounting bracket (not shown), and the swing axis passes through the mounting bracket and coincides with the rotation axis of the roller 300. Since the mounting bracket is additionally provided, the operating space is larger, which is convenient for assembly and maintenance.

[0051] The abutment 112 can abut against the pole piece strip 30 passing through the pole tab smoothing mechanism 100, and make the pole piece strip 30 pass through the smoothing member 113 at a preset angle. Specifically in the present embodiment, the abutment 112 is a pressure roller rotatably mounted on the swing frame 111, and the rotation axis of the pressure roller is parallel to the swing axis. In the process of the pole piece strip 30 passing through the pole tab smoothing mechanism 100, the pressure roller can be driven to rotate, and there is rolling friction between the pressure roller and the pole piece strip 30, so the friction between the abutment 112 and the pole piece strip 30 can be significantly reduced, thereby avoiding causing greater damage to the pole piece strip 30.

[0052] It should be pointed out that in other embodiments, the abutting member 112 may also be a spherical metal block, a cylindrical long rod or the like, as long as it can abut against the pole piece strip 30 without damaging the pole piece strip 30 .

[0053] When the pole piece strip 30 passes through the pole tab smoothing mechanism 100 and the roller 300, there are two position conditions. One of the position conditions is as follows: Figure 2 As shown, the pole piece strip 30 passes through the same side of the roller 300 and the abutment 112 at the same time, and the pole piece strip 30 passes under the roller 300 and the abutment 112. Of course, the pole piece strip 30 can also pass over the roller 300 and the abutment 112; another working position is as follows Figure 3 As shown, the pole piece strip 30 passes between the roller 300 and the abutment 112, and the pole piece strip 30 passes above the roller 300 and below the abutment 112. Of course, the pole piece strip 30 can also pass below the roller 300 and above the abutment 112.

[0054] The pole piece strip 30 is a supporting member 112, which specifically provides support for the pressure roller. More specifically, in combination with the rotation direction of the unwinding shaft 200 and the over roller 300, the pole piece unwinding device 10 has the following multiple different working conditions. First, the unwinding shaft 200 rotates in the clockwise direction to unwind the pole piece strip 30, and the over roller 300 rotates in the clockwise direction driven by the pole piece strip 30. At this time, the pole piece strip 30 passes under the pressure roller, and the pole piece strip 30 can better support the pressure roller, and the pressure roller rotates in the counterclockwise direction driven by the pole piece strip 30. Of course, the pole piece strip 30 can also pass over the pressure roller, so the pressure roller rotates in the clockwise direction driven by the pole piece strip 30.

[0055] Secondly, the unwinding shaft 200 rotates in the clockwise direction to unwind the pole piece strip 30, and the roller 300 rotates in the counterclockwise direction driven by the pole piece strip 30. At this time, the pole piece strip 30 passes under the pressure roller, and the pole piece strip 30 can better support the pressure roller, and the pressure roller rotates in the counterclockwise direction driven by the pole piece strip 30. Of course, the pole piece strip 30 can also pass over the pressure roller, so the pressure roller rotates in the clockwise direction driven by the pole piece strip 30.

[0056] Third, the unwinding shaft 200 rotates counterclockwise to unwind the pole piece strip 30, and the roller 300 rotates clockwise driven by the pole piece strip 30. At this time, the pole piece strip 30 passes under the pressure roller, and the pole piece strip 30 can better support the pressure roller, and the pressure roller rotates clockwise driven by the pole piece strip 30. Of course, the pole piece strip 30 can also pass over the pressure roller, so the pressure roller rotates counterclockwise driven by the pole piece strip 30.

[0057] Fourthly, the unwinding shaft 200 rotates counterclockwise to unwind the pole piece strip, and the roller 300 rotates counterclockwise driven by the pole piece strip. At this time, the pole piece strip 30 passes under the pressure roller, and the pole piece strip 30 can better support the pressure roller, and the pressure roller rotates clockwise driven by the pole piece strip 30. Of course, the pole piece strip 30 can also pass over the pressure roller, so the pressure roller rotates counterclockwise driven by the pole piece strip 30. Please refer to Figure 7 , the smoothing piece 113 can smooth the pole ear 31 of the pole piece strip 30. Specifically, the smoothing piece 113 is usually in the shape of a plate and has an edge facing the feeding direction of the pole piece strip 30. When the pole piece strip 30 passes through the smoothing piece 113, its folded pole ear 31 can abut against the edge of the smoothing piece 113, and as the pole piece strip 30 continues to be conveyed, the edge of the smoothing piece 113 can force the folded pole ear 31 to gradually unfold. Among them, the smoothing piece 113 is generally arranged in pairs of upper and lower parts, and the pole piece strip 30 can pass between the two smoothing pieces 113. The lower smoothing piece 113 can smooth the pole ear 31 folded downward, and the upper smoothing piece 113 can smooth the pole ear 31 folded upward.

[0058] In this embodiment, the position of the smoothing member 113 on the swing frame 111 is adjustable along the direction parallel to the swing axis. The extension direction of the swing axis is the width direction of the pole piece strip 30 passing through the pole tab smoothing mechanism 100. By adjusting the position of the smoothing member 113 along this direction, the position of the smoothing member 113 can be better matched with the position of the pole tab 31, thereby ensuring that the smoothing member 113 can smoothly smooth the pole tab 31.

[0059] For more details, please refer to Figure 6 The rotating assembly 110 further includes a support plate 114 mounted on the swing frame 111, and a mounting groove 1141 extending in a direction parallel to the swing axis is provided on the support plate 114, and the smoothing member 113 is mounted in the mounting groove 1141. The smoothing member 113 can slide along the mounting groove 1141 and be fixed at any position in the mounting groove 1141, so it is convenient to adjust the position of the smoothing member 113 along the extension direction of the swing axis.

[0060] Please refer again Figure 5, the counterweight assembly 120 is connected to the swing frame 111. Among them, the first torque applied to the swing frame 111 by the gravity of the counterweight assembly 120 is opposite in direction to the second torque applied to the swing frame 111 by the gravity of the rotating assembly 110. Moreover, the swing frame 111 can rotate under the joint action of the first torque and the second torque, and drive the abutment 112 to abut against the pole piece strip 30. The first torque and the second torque are in opposite directions, which means that the two can respectively rotate the swing frame 111 in opposite directions. During the unwinding process, the sum of the first torque and the second torque can make the swing frame 111 have a tendency to swing toward the pole piece strip 30.

[0061] In this way, when the diameter of the pole piece roll 20 on the unwinding shaft 200 changes and causes the wrap angle between the pole piece strip 30 and the roller 300 to change, the swing frame 111 can drive the abutment 112 to swing with the pole piece strip 30 so that the abutment 112 always maintains abutment with the pole piece strip 30.

[0062] by Figure 2 and Figure 3 As shown in the example, the pole piece strip 30 passes under the abutment 112, and the first torque makes the swing frame 111 have a tendency to swing away from the pole piece strip 30 (counterclockwise), while the second torque makes the swing frame 111 have a tendency to swing toward the pole piece strip 30 (clockwise). At this time, in order to make the abutment 112 always keep in contact with the pole piece strip 30, the second torque is greater than the first torque, so that the swing frame 111 has a tendency to swing in the clockwise direction.

[0063] When the abutting member 112 abuts against the pole piece strip 30, the angle θ between the pole piece strip 30 and the swing frame 111 satisfies the relationship: sinθ=(R+r) / L( Figure 2 Position conditions shown) or sinθ=(Rr) / L( Figure 3 Wherein, L is the distance between the swing axis of the swing frame 111 and the center of the abutment 112, R is the radius of the roller 300, and r is the radius of the abutment 112. Since L, R and r are all constants, no matter how the running direction of the pole piece strip 30 changes during the unwinding process, as long as the abutment 112 and the pole piece strip 30 are kept in contact, the angle θ remains unchanged.

[0064] The relative positions of the swing frame 111, the abutting member 112 and the smoothing member 113 are fixed. When the abutting member 112 and the pole piece strip 30 are kept in contact, the angle θ is constant, so the angle at which the pole piece strip 30 passes through the smoothing member 113 will not change. Therefore, the pole piece strip 30 can always pass through the smoothing member 113 at a preset angle, thereby improving the effect of smoothing the pole ear 31 during the unwinding process.

[0065] In addition, the first torque and the second torque can partially offset each other, so that the actual torque on the swing frame 111 is extremely small, so the torque applied by the pole piece strip 30 to the abutment 112 to keep the swing frame 111 balanced is also extremely small. Therefore, the pressure exerted by the abutment 112 on the pole piece strip 30 is also small, so the influence of the abutment 112 on the tension of the pole piece strip 30 can be reduced to ensure smooth unwinding.

[0066] In this embodiment, the counterweight assembly 120 includes a basic counterweight block 121 and an adjustable counterweight block 122, and the adjustable counterweight block 122 can adjust the magnitude of the first torque. The basic counterweight block 121 is generally fixed to the swing frame 111, and can limit the maximum torque actually received by the swing frame 111. The adjustable counterweight block 122 can further change the first torque, so that the torque received by the swing frame 111 can be adjusted according to the actual working conditions. Specifically, the adjustable counterweight block 122 can adjust the first torque by adding or subtracting weight, or by changing the position to adjust the center of gravity.

[0067] Furthermore, in this embodiment, the adjustable counterweight 122 can adjust the first torque to offset the second torque, or make the sum of the first torque and the second torque less than a preset value. The adjustable counterweight 122 can adjust the center of mass of the rotating assembly 110 and the counterweight assembly 120 as a whole to the swing axis, so that the first torque and the second torque are completely offset, that is, the actual torque received by the swing frame 111 is 0. At this time, the swing frame 111 has no tendency to swing in any direction, so it is convenient to thread the pole piece strip 30 or perform shutdown maintenance and other operations.

[0068] During normal unwinding, the adjustable weight 122 can be adjusted to make the sum of the first torque and the second torque less than a preset value. At this time, the pressure of the abutment member 112 on the pole piece strip 30 is also less than the threshold value that causes the tension of the pole piece strip 30 to fluctuate, so it helps to maintain the tension of the pole piece strip 30 stable.

[0069] Please refer again Figure 4 and Figure 6 In this embodiment, the swing frame 111 includes a first swing arm 1111 and a second swing arm 1112. The first swing arm 1111 and the second swing arm 1112 are arranged at intervals along the extension direction of the swing axis and can rotate synchronously around the swing axis. The supporting member 112 and the smoothing member 113 are distributed between the first swing arm 1111 and the second swing arm 1112.

[0070] Specifically, the first swing arm 1111 and the second swing arm 1112 can be rotatably mounted on both ends of the fixed core shaft 310, so that the swing frame 111 can be supported from both ends of the fixed core shaft 310. Moreover, by arranging the abutting member 112 and the smoothing member 113 between the first swing arm 1111 and the second swing arm 1112, the center of gravity of the rotating assembly 110 can be more centered. In this way, the stability of the swing frame 111 during the rotation around the swing axis can be improved.

[0071] In order to further balance the center of gravity of the rotating assembly 110 as a whole, in this embodiment, the smoothing member 113 is installed on one side of the second swing arm 1112 , and the counterweight assembly 120 is disposed on one side of the first swing arm 1111 .

[0072] Please refer again Figures 4 to 6 In this embodiment, the tab smoothing mechanism 100 further includes a positioning assembly 130, which can lock the swing frame 111 and prevent the swing frame 111 in a locked state from rotating around a swing axis.

[0073] During normal unwinding, the positioning assembly 130 does not lock the swing frame 111, and the swing frame 111 can smoothly rotate around the swing axis. During the first unwinding or changing of the roll, the positioning assembly 130 can fix the swing frame 111 at a certain angle to facilitate operation.

[0074] Furthermore, in this embodiment, the tab smoothing mechanism 100 further includes a mounting seat 140, the mounting seat 140 is fixedly connected to the fixed mandrel 310, and the swing frame 111 is rotatably mounted on the mounting seat 140 around the swing axis. The positioning assembly 130 includes an arc-shaped positioning plate 131 fixed to the swing frame 111 and an indexing pin 132 mounted on the mounting seat 140, the swing axis passes through the center of the arc-shaped positioning plate 131, and a plurality of positioning holes 1311 are provided along the extension direction of the arc-shaped positioning plate 131, and the indexing pin 132 can be inserted into any positioning hole 1311 to lock the swing frame 111.

[0075] After the indexing pin 132 is inserted into the positioning hole 1311, the arc-shaped positioning plate 131 will not be able to rotate relative to the mounting seat 140, thereby locking the swing frame 111. In addition, by manually rotating the swing frame 111 and inserting the indexing pin 132 into different positioning holes 1311, the swing frame 111 can be locked at different angles, thereby flexibly adjusting the angle of the swing frame 111 according to the angle requirements of the pole piece strip 30.

[0076] Furthermore, in the present embodiment, the mounting seat 140 includes a fixing ring 141 and a mounting plate 142 connected to the fixing ring 141, the fixing ring 141 is sleeved on and fixed to the fixing spindle 310, the mounting plate 142 has a fixing hole (not shown) concentric with the fixing spindle 310, and the rotating assembly 110 includes a driving shaft 115 fixedly connected to the swing frame 111, and the driving shaft 115 is rotatably mounted in the fixing hole through a bearing 116.

[0077] The bearing 116 is installed in the fixing hole, and the driving shaft 115 is locked with the inner ring of the bearing 116, so that the driving shaft 115 can rotate around the swing axis, thereby enabling the swing frame 111 to rotate around the swing axis. Specifically, the driving shaft 115 is fixedly connected to the first swing arm 1111, so that the first swing arm 1111 can rotate around the swing axis, and the second swing arm 1111 can be directly connected to the fixed core shaft 310 through another bearing (not shown).

[0078] In the above-mentioned pole ear smoothing mechanism 100 and pole piece unwinding device 10, when the diameter of the pole piece roll 20 on the unwinding shaft 200 changes and causes the wrap angle between the pole piece strip 30 and the roller 300 to change, the swing frame 111 can drive the abutment 112 to swing along with the pole piece strip 30, so that the abutment 112 always keeps in contact with the pole piece strip 30. Since the relative positions of the swing frame 111, the abutment 112 and the smoothing member 113 are fixed, when the abutment 112 keeps in contact with the pole piece strip 30, the angle at which the pole piece strip 30 passes through the smoothing member 113 will not change. Therefore, the pole piece strip 30 can always pass through the smoothing member 113 at a preset angle, thereby improving the effect of smoothing the pole ear 31 during the unwinding process. Moreover, the torque after the first torque and the second torque offset each other is extremely small, and the pressure exerted by the abutment 112 on the pole piece strip 30 is also relatively small, so the influence of the abutment 112 on the tension of the pole piece strip 30 can be reduced to ensure smooth unwinding.

[0079] 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.

[0080] 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 tab smoothing mechanism, characterized in that: include: A rotating assembly includes a swing frame, a supporting member and a smoothing member, wherein the swing frame is rotatably arranged around a swing axis, and the supporting member and the smoothing member are both installed on the swing frame; and A counterweight assembly is connected to the swing frame.

2. The tab smoothing mechanism according to claim 1, characterized in that: The swing frame includes a first swing arm and a second swing arm, the first swing arm and the second swing arm are arranged at intervals along the extension direction of the swing axis and can rotate synchronously around the swing axis, and the supporting member and the smoothing member are distributed between the first swing arm and the second swing arm.

3. The tab smoothing mechanism according to claim 1, characterized in that: The abutting member is a pressure roller rotatably mounted on the swing frame, and the rotation axis of the pressure roller is parallel to the swing axis.

4. The tab smoothing mechanism according to claim 1, characterized in that: The position of the smoothing member on the swing frame is adjustable along a direction parallel to the swing axis.

5. The tab smoothing mechanism according to claim 1, characterized in that: The first torque applied to the swing frame by the gravity of the counterweight assembly is in opposite direction to the second torque applied to the swing frame by the gravity of the rotating assembly; the swing frame can drive the abutment member to abut against the pole piece strip passing through the pole ear smoothing mechanism under the joint action of the first torque and the second torque, and make the pole piece strip pass through the smoothing member at a preset angle.

6. The tab smoothing mechanism according to claim 5, characterized in that: The counterweight assembly includes a basic counterweight block and an adjustable counterweight block, and the adjustable counterweight block can adjust the magnitude of the first torque.

7. The tab smoothing mechanism according to claim 6, characterized in that: The adjustable counterweight can adjust the first torque to offset the second torque, or make the sum of the first torque and the second torque smaller than a preset value.

8. The tab smoothing mechanism according to claim 1, characterized in that: It also includes a positioning assembly, which can lock the swing frame and prevent the swing frame in a locked state from rotating around the swing axis.

9. The tab smoothing mechanism according to claim 8, characterized in that: It also includes a mounting seat, and the swing frame is rotatably mounted on the mounting seat around the swing axis. The positioning assembly includes an arc-shaped positioning plate fixed to the swing frame and a dividing pin installed on the mounting seat. The swing axis passes through the center of the arc-shaped positioning plate, and a plurality of positioning holes are opened along the extension direction of the arc-shaped positioning plate. The dividing pin can be inserted into any of the positioning holes to lock the swing frame.

10. The tab smoothing mechanism according to claim 1, characterized in that: It also includes a mounting seat, and the swing frame is rotatably mounted on the mounting seat around the swing axis.

11. A roller assembly, characterized in that: It comprises a roller and a tab smoothing mechanism as described in any one of claims 1 to 10, and the swing axis is consistent with the extension direction of the rotation axis of the roller.

12. The roller assembly according to claim 11, characterized in that: The roller is mounted on a fixed mandrel and can rotate around the axis of the fixed mandrel. The tab smoothing mechanism is mounted on the fixed mandrel, and the swing axis is made to coincide with the rotation axis of the roller.

13. The roller assembly according to claim 12, characterized in that: The swing frame is arranged on the fixed core shaft.

14. The roller assembly according to claim 12, characterized in that: The tab smoothing mechanism includes a mounting seat, which includes a fixing ring and a mounting plate connected to the fixing ring, the fixing ring is sleeved and fixed on the fixed core shaft, the mounting plate has a fixing hole concentric with the fixed core shaft, and the rotating assembly includes a driving shaft fixedly connected to the swing frame, and the driving shaft is rotatably mounted in the fixing hole through a bearing.

15. The roller assembly according to claim 11, characterized in that: It also includes a mounting bracket, the swing frame is mounted on the mounting bracket and makes the swing axis coincide with the rotation axis of the roller.

16. A pole piece unwinding device, characterized in that: It comprises an unwinding shaft and a roller assembly as described in any one of claims 11 to 15 above; wherein the tab smoothing mechanism is located between the unwinding shaft and the roller, and the swing axis extends in the same direction as the rotation axis of the roller and the unwinding shaft.

17. The pole piece unwinding device according to claim 16, characterized in that: The abutment member is a pressure roller rotatably mounted on the swing frame, the unwinding shaft rotates in a clockwise direction to unwind the pole piece strip, the passing roller rotates in a clockwise direction driven by the pole piece strip, and the pressure roller rotates in a clockwise or counterclockwise direction driven by the pole piece strip.

18. The pole piece unwinding device according to claim 16, characterized in that: The abutment member is a pressure roller rotatably mounted on the swing frame, the unwinding shaft rotates in a clockwise direction to unwind the pole piece strip, the passing roller rotates in a counterclockwise direction driven by the pole piece strip, and the pressure roller rotates in a clockwise or counterclockwise direction driven by the pole piece strip.

19. The pole piece unwinding device according to claim 16, characterized in that: The abutment member is a pressure roller rotatably mounted on the swing frame, the unwinding shaft rotates counterclockwise to unwind the pole piece strip, the passing roller rotates clockwise under the drive of the pole piece strip, and the pressure roller rotates clockwise or counterclockwise under the drive of the pole piece strip.

20. The pole piece unwinding device according to claim 16, characterized in that: The abutment member is a pressure roller rotatably mounted on the swing frame, the unwinding shaft rotates counterclockwise to unwind the pole piece strip, the passing roller rotates counterclockwise under the drive of the pole piece strip, and the pressure roller rotates clockwise or counterclockwise under the drive of the pole piece strip.

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