Automatic tape splicing device for pole pieces

Abstract

The utility model provides an automatic pole piece tape splicing device, and relates to the technical field of pole piece tape splicing. The automatic tape splicing device for the pole piece comprises a left suction plate assembly, a right suction plate assembly, a cutter assembly, a movement driving assembly and a cutter driving assembly, the left suction plate assembly and the right suction plate assembly are oppositely arranged, the left suction plate assembly and / or the right suction plate assembly are / is connected with the movable driving assembly, and the movable driving assembly is used for driving the left suction plate assembly and the right suction plate assembly to move close to each other or away from each other. The side, facing the left suction plate assembly, of the right suction plate assembly is provided with an extending seam communicating with the inner cavity of the right suction plate assembly, the cutter assembly is arranged in the cavity, and the cutter driving assembly can be connected with the cutter assembly to drive the cutter assembly to extend out of the extending seam. According to the automatic tape splicing device for the pole pieces, the left suction plate assembly and the right suction plate assembly can be driven to stably clamp the standby pole pieces through the movable driving assembly, the cutter can be driven to cut off the standby pole pieces through the cutter driving assembly, and the movable driving assembly does not need to overcome the resistance of a pressure spring and does not need to apply larger thrust when the pole pieces are cut off.

Description

Technical Field

[0001] The utility model relates to the technical field of pole piece connecting tapes, in particular to an automatic pole piece connecting tape device. Background Technique

[0002] During the production process of lithium batteries, automatic winding of cathode / anode sheets is required. When the pole piece material roll is used up, the standby material roll needs to be started to complete the automatic roll change function.

[0003] To achieve the automatic roll change function, the existing patent CN106904470A discloses an automatic connecting tape device. This automatic connecting tape device can cut and separate the tape being used from its material roll, and at the same time connect the front end of the tape of the standby material roll to the tail end of the tape being used by means of adhesive tape adhesion. However, the cutter for cutting the tape in this automatic connecting tape device is always in the extended state at the right suction cup mechanism. During the tape connecting process, the right suction cup mechanism needs to be flipped so that the adhesive tape adsorbed on its top faces the tape to be bonded adsorbed on one side of the left suction cup mechanism. At this time, the always extended cutter will affect the flipping of the right suction cup mechanism. In order to avoid the cutter, the right suction cup mechanism needs to retreat a large distance, affecting the working efficiency.

[0004] To solve the problem that the cutter affects the working efficiency, the existing patent CN205932617U discloses an automatic pole piece roll change device. The cutter in this automatic pole piece roll change device is connected to the right suction plate mechanism through a compression spring, and the automatic extension and retraction of the cutter can be realized. Specifically, in this automatic pole piece roll change device, a guide shaft is installed on the right suction plate seat through a linear bearing. One end of the guide shaft far from the right suction plate seat is fixedly connected to the right suction plate, and the end close to the right suction plate seat is processed into a flange shape for limiting; the right suction plate consists of upper and lower parts. A compression spring is installed between the right suction plate and the right suction plate seat to play a thrusting role; a cutter is installed at the middle position of the right suction plate seat, and the cutter is located between the upper and lower parts of the right suction plate. During use, the right suction plate cylinder connected to the right suction plate seat will first drive the right suction plate seat, the guide shaft and the right suction plate to move close to the left suction plate at the same time, so as to tightly press and fit the standby pole piece and the pole piece between the left suction plate and the right suction plate. Subsequently, the right suction plate cylinder continues to drive the right suction plate seat to move close to the left suction plate. Under the reverse thrust of the left suction plate on the right suction plate, the compression spring is compressed, thereby driving the cutter to extend from between the upper and lower parts of the right suction plate and cut off the standby pole piece and the pole piece.

[0005] However, in the automatic pole piece roll change device disclosed in the existing patent CN205932617U, in order to stably clamp the standby pole piece and the pole piece between the right suction plate and the left suction plate, the right suction plate cylinder needs to apply a large thrust to the right suction plate to overcome the resistance of the compression spring. And when subsequently driving the cutter to cut off the pole piece, the right suction plate cylinder needs to provide a greater thrust, resulting in a large starting resistance of the right suction plate cylinder during cutting, and it is easy to be unable to cut off the pole piece due to insufficient impact force. Summary of the Invention

[0006] The purpose of the present utility model is to provide an automatic pole piece tape connecting device, so as to alleviate the technical problem existing in the prior art that in an automatic pole piece rewinding device capable of realizing automatic telescoping of a cutting knife, in order to stably clamp a spare pole piece and a pole piece between a right suction plate and a left suction plate, a right suction plate cylinder needs to apply a large thrust to the right suction plate against the resistance of a compression spring, and when subsequently driving the cutting knife to cut the pole piece, the right suction plate cylinder needs to provide a greater thrust, resulting in a large starting resistance of the right suction plate cylinder during cutting and being prone to inability to cut the pole piece due to insufficient impact force.

[0007] In a first aspect, the present utility model provides an automatic pole piece tape connecting device, including a left suction plate assembly, a right suction plate assembly, a cutting knife assembly, a moving driving assembly, and a cutting knife driving assembly;

[0008] The left suction plate assembly and the right suction plate assembly are arranged oppositely, the left suction plate assembly and / or the right suction plate assembly are connected to the output end of the moving driving assembly, and the moving driving assembly is used to drive the left suction plate assembly and the right suction plate assembly to move closer to or away from each other;

[0009] A cavity is provided inside the right suction plate assembly, an extending slit communicating with the cavity is provided on one side of the right suction plate assembly facing the left suction plate assembly, the cutting knife assembly is arranged in the cavity, and the output end of the cutting knife driving assembly can be connected to the cutting knife assembly to drive the cutting knife assembly to extend out of the extending slit.

[0010] In an optional embodiment, a through port communicating with the cavity is provided on the side of the right suction plate assembly facing away from the left suction plate assembly, the output end of the cutting knife driving assembly is located on one side of the through port, and the output end of the cutting knife driving assembly can pass through the through port and push the cutting knife assembly to extend out of the extending slit.

[0011] In an optional embodiment, an elastic member is connected between the cutting knife assembly and the right suction plate assembly, and the elastic member is used for storing energy when the cutting knife assembly extends out of the extending slit and for releasing energy when the output end of the cutting knife driving assembly moves away from the cutting knife assembly.

[0012] In an optional embodiment, the cutting knife assembly includes a cutting knife and a cutting knife connecting plate, the cutting knife is fixed on one side of the cutting knife connecting plate, and the cutting knife connecting plate is used to drive the cutting knife to extend out of the extending slit under the drive of the cutting knife driving assembly.

[0013] In an optional embodiment, the material density of the cutting knife connecting plate is less than the material density of the right suction plate assembly.

[0014] In an alternative embodiment, a guide rail assembly is provided between the cutter assembly and the inner wall of the cavity, and the cutter assembly is slidably connected to the inside of the cavity through the guide rail assembly.

[0015] In an alternative embodiment, the right suction plate assembly includes an upper right suction plate, a lower right suction plate, and a right suction plate seat. A cavity is provided inside the right suction plate seat. The upper right suction plate and the lower right suction plate are both fixed to one side of the right suction plate seat, and a gap is provided between the upper right suction plate and the lower right suction plate to form the protruding slit.

[0016] In an alternative embodiment, the moving drive assembly includes a right drive assembly. A right support structure is provided at the output end of the right drive assembly. The right suction plate assembly and the cutter drive assembly are respectively fixedly connected to the right support structure.

[0017] In an alternative embodiment, the moving drive assembly further includes a left drive assembly. A left support structure is provided at the output end of the left drive assembly. The left suction plate assembly is fixedly connected to the left support structure.

[0018] In an alternative embodiment, an auxiliary drive assembly is further included. The auxiliary drive assembly is connected between the left support structure and the left suction plate assembly, and / or between the right support structure and the right suction plate assembly. The auxiliary drive assembly is configured to drive the left suction plate assembly and the right suction plate assembly to move closer to or away from each other.

[0019] The automatic pole piece tape connecting device provided by the utility model comprises a left suction plate assembly, a right suction plate assembly, a cutter assembly, a moving driving assembly and a cutter driving assembly; the left suction plate assembly and the right suction plate assembly are arranged oppositely, the left suction plate assembly and / or the right suction plate assembly is connected with the output end of the moving driving assembly, and the moving driving assembly is used for driving the left suction plate assembly and the right suction plate assembly to move closer to or away from each other; a cavity is arranged inside the right suction plate assembly, an extending slit communicated with the cavity is arranged on the side of the right suction plate assembly facing the left suction plate assembly, the cutter assembly is arranged in the cavity, and the output end of the cutter driving assembly can be connected with the cutter assembly to drive the cutter assembly to extend out of the extending slit. The automatic pole piece tape connecting device provided by the utility model is used for automatically connecting a pole piece material roll about to be used up and a spare material roll. During the automatic tape connecting process, the pole piece on the pole piece material roll and the spare pole piece on the spare material roll need to be cut off first, then the cut-off pole piece and the spare pole piece are butted, and finally, adhesive tapes are bonded on both sides of the butted pole piece and the spare piece to complete the whole tape connecting process. Before cutting off the pole piece and the spare pole piece, the pole piece material roll about to be used up can be placed on one side of the left suction plate assembly in the automatic pole piece tape connecting device, and the pole piece on the pole piece material roll is made to pass through the gap between the left suction plate assembly and the right suction plate assembly and be located on the side of the left suction plate assembly far away from the pole piece material roll. At the same time, the spare material roll is placed on one side of the right suction plate assembly and on the same side of the automatic pole piece tape connecting device as the pole piece material roll about to be used up, and then the spare pole piece on the spare material roll is made to pass through the gap between the left suction plate assembly and the right suction plate assembly and be located on the side of the right suction plate assembly far away from the pole piece material roll. Then the moving driving assembly can be started, and the moving driving assembly is used to drive the left suction plate assembly and the right suction plate assembly to move closer to each other and stably clamp the pole piece and the spare pole piece between them. Then the cutter driving assembly can be started to drive the cutter assembly to extend out of the extending slit, so as to cut off the pole piece and the spare pole piece clamped between the left suction plate assembly and the right suction plate assembly. Compared with the existing automatic pole piece roll changing device that first uses a right suction plate cylinder to stably clamp the pole piece and the spare pole piece by overcoming the resistance of the compression spring, and then continues to overcome the resistance of the compression spring to push out the cutter to cut off the pole piece and the spare pole piece, the automatic pole piece tape connecting device provided by the utility model uses the moving driving assembly to drive the left suction plate assembly and the right suction plate assembly to stably clamp the pole piece and the spare pole piece, and then uses the cutter driving assembly to drive the cutter assembly to cut off the pole piece and the spare pole piece. The moving driving assembly does not need to overcome the resistance of the compression spring to stably clamp the pole piece and the spare pole piece. When cutting off the pole piece and the spare pole piece, the moving driving assembly does not need to continue to overcome the resistance of the compression spring and does not need to provide a greater thrust. At this time, the cutter driving assembly applies a thrust to the cutter assembly to cut off the pole piece and the spare pole piece. When cutting off the pole piece and the spare pole piece, the starting resistance of the cutter driving assembly will not be too large, and it is easy to cut off the pole piece and the spare slice.

[0020] Compared with the prior art, the automatic pole piece splicing device provided by the present utility model can drive the left suction plate assembly and the right suction plate assembly to move closer to each other through the moving drive assembly to stably clamp the spare pole piece and the pole piece. Through the cutter drive assembly, the cutter assembly can be driven to extend from the extension seam, thereby cutting off the spare pole piece and the pole piece. When the moving drive assembly drives the left suction plate assembly and the right suction plate assembly to move closer to each other, it does not need to overcome the resistance of the compression spring, and the moving drive assembly does not need to apply a greater thrust to the cutter assembly when the cutter assembly cuts off the pole piece. By directly applying the driving force of the cutter drive assembly to the cutter assembly, the automatic pole piece splicing device can reduce the starting resistance while ensuring the cutting speed and cutting effect. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is the front view of the pole piece, spare pole piece and automatic pole piece splicing device provided by the embodiment of the present utility model;

[0023] Figure 2 It is the front view of the automatic pole piece splicing device provided by the embodiment of the present utility model;

[0024] Figure 3 It is the structural schematic diagram of the automatic pole piece splicing device provided by the embodiment of the present utility model;

[0025] Figure 4 It is the structural schematic diagram of the cutter drive assembly and the cutter assembly provided by the embodiment of the present utility model;

[0026] Figure 5 It is the partial structural schematic diagram of the right suction plate assembly provided by the embodiment of the present utility model;

[0027] Figure 6 It is the cross-sectional view of the cutter drive assembly, the cutter assembly and the right suction plate assembly provided by the embodiment of the present utility model.

[0028] Icon: 1 - Left suction plate assembly; 10 - Upper left suction plate; 11 - Lower left suction plate; 12 - Left suction plate seat; 13 - Left adhesive tape suction plate; 14 - Cutter groove; 2 - Right suction plate assembly; 20 - Cavity; 200 - Guide rail assembly; 21 - Extension seam; 22 - Through port; 23 - Upper right suction plate; 24 - Lower right suction plate; 25 - Right suction plate seat; 26 - Right adhesive tape suction plate; 3 - Cutter assembly; 30 - Cutter drive assembly; 31 - Cutter; 32 - Cutter connecting plate; 33 - Contact block; 4 - Moving drive assembly; 40 - Right drive assembly; 400 - Right support structure; 4000 - Right sliding plate; 4001 - Right support seat; 41 - Left drive assembly; 410 - Left support structure; 4100 - Left sliding plate; 4101 - Left support seat; 5 - Pole piece material roll; 50 - Pole piece; 51 - Left over-roller; 52 - Left receiving plate; 53 - First take-up shaft; 6 - Spare material roll; 60 - Spare pole piece; 61 - Right over-roller; 62 - Right receiving plate; 63 - Second take-up shaft; 7 - Auxiliary drive assembly; 8 - Right flipping drive assembly; 9 - Left flipping drive assembly. Detailed implementation manners

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0031] The following will describe in detail some implementation manners of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0032] Embodiment:

[0033] As Figures 1 - 6As shown in the figure, the automatic pole piece tape connecting device provided in this embodiment includes a left suction plate assembly 1, a right suction plate assembly 2, a cutter assembly 3, a moving drive assembly 4, and a cutter drive assembly 30; the left suction plate assembly 1 and the right suction plate assembly 2 are arranged opposite to each other, and the left suction plate assembly 1 or the right suction plate assembly 2 is connected to the output end of the moving drive assembly 4, or both the left suction plate assembly 1 and the right suction plate assembly 2 are connected to the output end of the moving drive assembly 4. The moving drive assembly 4 is used to drive the left suction plate assembly 1 and the right suction plate assembly 2 to move closer to or away from each other; a cavity 20 is provided inside the right suction plate assembly 2, and an extending slit 21 communicating with the cavity 20 is provided on the side of the right suction plate assembly 2 facing the left suction plate assembly 1. The cutter assembly 3 is arranged in the cavity 20, and the output end of the cutter drive assembly 30 can be connected to the cutter assembly 3 to drive the cutter assembly 3 to extend out of the extending slit 21.

[0034] The automatic pole piece tape connecting device provided in this embodiment is used for automatically connecting the pole piece coil 5 that is about to be used up and the spare coil 6. During the automatic tape connecting process, the pole piece 50 on the pole piece coil 5 and the spare pole piece 60 on the spare coil 6 need to be cut off first, and then the cut-off pole piece 50 and the spare pole piece 60 are butted, and finally, tapes are adhered to both sides of the butted pole piece 50 and the spare pole piece 60 to complete the entire tape connecting process.

[0035] Before cutting off the pole piece 50 and the spare pole piece 60, as Figure 1 shown, the pole piece coil 5 that is about to be used up can be placed on one side of the left suction plate assembly 1 in this automatic pole piece tape connecting device, and the pole piece 50 on the pole piece coil 5 is made to pass through the space between the left suction plate assembly 1 and the right suction plate assembly 2 and be located on the side of the left suction plate assembly 1 away from the pole piece coil 5. At the same time, the spare coil 6 is placed on one side of the right suction plate assembly 2 and on the same side of the automatic pole piece tape connecting device as the pole piece coil 5 that is about to be used up, and then the spare pole piece 60 on the spare coil 6 is made to pass through the space between the left suction plate assembly 1 and the right suction plate assembly 2 and be located on the side of the right suction plate assembly 2 away from the pole piece coil 5. To improve the moving stability and smoothness of the pole piece 50 and the spare pole piece 60, as Figure 1 and Figure 2As shown in the figure, the automatic pole piece rewinding device may further include a left idler roller 51 and a right idler roller 61. The left idler roller 51 is arranged on the side of the left suction plate assembly 1 away from the pole piece coil 5, and the right idler roller 61 is arranged on the side of the right suction plate assembly 2 away from the spare coil 6. The pole piece 50 on the above-mentioned pole piece coil 5 passes through the gap between the left suction plate assembly 1 and the right suction plate assembly 2 and then bypasses the left idler roller 51 and is conveyed to the next working station. The automatic pole piece rewinding device further includes a first winding shaft 53 and a second winding shaft 63. The first winding shaft 53 is arranged between the left idler roller 51 and the left suction plate assembly 1, and the second winding shaft 63 is arranged between the right idler roller 61 and the right suction plate assembly 2. The spare pole piece 60 on the spare coil 6 passes through the gap between the left suction plate assembly 1 and the right suction plate assembly 2 and is fixed by the second winding shaft 63. (When the pole piece coil 5 and the spare coil 6 are arranged in opposite directions, the spare pole piece 60 is fixed by the first winding shaft 53). The first winding shaft 53 and the second winding shaft 63 can be driven to adjust the pole piece 50 and the spare pole piece 60 to move in the width direction, so as to adjust the alignment of the pole piece 50 and the spare pole piece 60.

[0036] Then start the moving drive assembly 4, use the moving drive assembly 4 to drive the left suction plate assembly 1 and the right suction plate assembly 2 to move closer to each other, and firmly clamp the pole piece 50 and the spare pole piece 60 between the left suction plate assembly 1 and the right suction plate assembly 2. Then the cutter drive assembly 30 can be started, so that the cutter drive assembly 30 drives the cutter assembly 3 to extend out of the extending slot 21, so as to cut off the pole piece 50 and the spare pole piece 60 clamped between the left suction plate assembly 1 and the right suction plate assembly 2. To facilitate the storage of the pole piece 50, as Figure 1 and Figure 2 shown, the automatic pole piece rewinding device may further include a left receiving tray 52 and a right receiving tray 62. The left receiving tray 52 is located on one side of the left idler roller 51, and the right receiving tray 62 is located on one side of the right idler roller 61. The left receiving tray 52 and the right receiving tray 62 are used to store the upper spare pole piece 60 of the spare coil 6 (the upper spare pole piece 60 is the head of the spare pole piece 60 that is not used. When the pole piece coil 5 and the spare coil 6 are arranged in opposite directions, the spare pole piece 60 is stored by the left receiving tray 52). After cutting off the pole piece 50 and the spare pole piece 60, the pole piece 50 on the left receiving tray 52 and the spare pole piece 60 on the spare coil 6 carry out the subsequent tape connection process, and the pole piece coil 5 and the right idler roller 61 can rotate in the reverse direction to draw away the lower pole piece 50 of the pole piece coil 5 and the upper pole piece 50 of the spare coil 6.

[0037] Among them, when the left suction plate assembly 1 or the right suction plate assembly 2 is connected to the output end of the moving drive assembly 4, the moving drive assembly 4 can adopt telescopic drive devices such as cylinders and oil cylinders. When both the left suction plate assembly 1 and the right suction plate assembly 2 are connected to the output end of the moving drive assembly 4, the moving drive assembly 4 can adopt telescopic drive devices with two output ends such as double-headed cylinders and double-headed oil cylinders. The cutter drive assembly 30 can also select telescopic drive devices such as cylinders and oil cylinders.

[0038] Compared with the existing automatic pole piece rewinding device that first uses the right suction plate cylinder to stably clamp the pole piece and the spare pole piece by overcoming the resistance of the compression spring, and then continues to overcome the resistance of the compression spring to push out the cutting knife to cut the pole piece and the spare pole piece, the automatic pole piece splicing device provided in this embodiment uses the moving drive assembly 4 to drive the left suction plate assembly 1 and the right suction plate assembly 2 to stably clamp the pole piece 50 and the spare pole piece 60, and then uses the cutting knife drive assembly 30 to drive the cutting knife assembly 3 to cut the pole piece 50 and the spare pole piece 60. The moving drive assembly 4 does not need to overcome the resistance of the compression spring to achieve the stable clamping of the pole piece 50 and the spare pole piece 60. When cutting the pole piece 50 and the spare pole piece 60, the moving drive assembly 4 does not need to continue to overcome the resistance of the compression spring and does not need to provide a greater thrust. At this time, by applying a thrust to the cutting knife assembly 3 through the cutting knife drive assembly 30, the cutting of the pole piece 50 and the spare pole piece 60 can be achieved. When cutting the pole piece 50 and the spare pole piece 60, the starting resistance of the cutting knife drive assembly 30 will not be too large, and it is easy to cut the pole piece 50 and the spare slice.

[0039] It should be noted that after cutting the pole piece 50 and the spare pole piece 60, the side of the pole piece 50 close to the pole piece coil 5 and the side of the spare pole piece 60 far from the spare coil 6 can be removed, so as to achieve the docking between the pole piece 50 and the spare pole piece 60. Then, adhesive tapes are respectively bonded on both sides of the docked pole piece 50 and the spare pole piece 60 to achieve the splicing of the pole piece 50 and the spare pole piece 60. The docking and adhesive tape bonding processes between the above-mentioned pole piece 50 and the spare pole piece 60 can refer to the prior art, such as the existing patent CN106904470A and the existing patent CN205932617U, and the specific working process will not be elaborated here.

[0040] Compared with the prior art, the automatic pole piece splicing device provided in this embodiment can drive the left suction plate assembly 1 and the right suction plate assembly 2 to move closer to each other through the moving drive assembly 4 to stably clamp the spare pole piece 60 and the pole piece 50, and through the cutting knife drive assembly 30, the cutting knife assembly 3 can be driven to extend from the extension slit 21, so as to cut the spare pole piece 60 and the pole piece 50. When the moving drive assembly 4 drives the left suction plate assembly 1 and the right suction plate assembly 2 to move closer to each other, it does not need to overcome the resistance of the compression spring, and the moving drive assembly 4 does not need to apply a greater thrust to the cutting knife assembly 3 when the cutting knife assembly 3 cuts the pole piece 50. By directly applying the driving force of the cutting knife drive assembly 30 to the cutting knife assembly 3, the automatic pole piece splicing device can reduce the starting resistance while ensuring the cutting speed and cutting effect.

[0041] In addition, it should also be noted that in the automatic pole piece rewinding device disclosed in the existing patent CN205932617U, the right suction plate is only connected to the right suction plate seat through the guide shaft, resulting in that the right suction plate is only supported by several guide shafts. At this time, the right suction plate is a floating structure, and during use, the right suction plate is extremely easy to deform, making it difficult to tightly press the pole piece and the spare pole piece.

[0042] In the pole piece automatic tape connecting device provided in this embodiment, the right suction plate assembly 2 is an integral structure, and the side for pressing and fitting the pole piece 50 and the spare pole piece 60 can be effectively supported, is not easily deformed, and can effectively ensure the pressing effect.

[0043] In this embodiment, the output end of the cutter driving assembly 30 can always be connected to the cutter assembly 3. At this time, the cutter driving assembly 30 can not only drive the cutter assembly 3 to extend out of the extension slot 21 when extending, but also drive the cutter assembly 3 to retract into the cavity 20 of the right suction plate assembly 2 when shortening, so as to prevent the cutter assembly 3 from affecting the flipping process when the right suction plate assembly 2 needs to flip.

[0044] Alternatively, the cutter driving assembly 30 can be connected to the cutter assembly 3 only during the process of the cutter assembly 3 extending out of the extension slot 21. At this time, the process of the cutter assembly 3 retracting into the cavity 20 can be realized by a resetting member, such as a spring or a magnet. When the resetting member is a magnet, the connection or separation between the cutter assembly 3 and the output end of the cutter driving assembly 30 can be realized by the mutual cooperation of the magnetic field change of the magnet and the stroke change of the output end of the cutter driving assembly 30.

[0045] This embodiment preferably has the cutter driving assembly 30 connected to the cutter assembly 3 only during the process of the cutter assembly 3 extending out of the extension slot 21. At this time, as shown in Figure 3 、 Figure 5 and Figure 6 , a through port 22 communicating with the cavity 20 is provided on the side of the right suction plate assembly 2 facing away from the left suction plate assembly 1. The output end of the cutter driving assembly 30 is located on one side of the through port 22, and the output end of the cutter driving assembly 30 can pass through the through port 22 and push the cutter assembly 3 to extend out of the extension slot 21.

[0046] The through port 22 on the right suction plate assembly 2 is used to make way for the output end of the cutter driving assembly 30, so that after the cutter driving assembly 30 is started, the output end of the cutter driving assembly 30 can impact the cutter assembly 3, thereby pushing the cutter assembly 3 to extend out of the extension slot 21.

[0047] It should be noted that in the pole piece automatic roll changing device disclosed in the existing patent CN205932617U, the right suction plate and the right suction plate seat are both fixed on the right suction plate cylinder. As a result, during the process of the left and right suction plates pressing the pole piece, the right suction plate cylinder needs to first overcome the resistance of the compression spring between the right suction plate and the right suction plate seat. During the subsequent process of the cutter cutting the pole piece, the right suction plate cylinder also needs to increase the thrust to further overcome the compression spring resistance to push the cutter out. Therefore, when cutting the pole piece, the starting resistance of the right suction plate cylinder is relatively large.

[0048] In the automatic pole piece rewinding device provided in this embodiment, the cutter driving assembly 30 and the right suction plate assembly 2 can be independently arranged. The cutter driving assembly 30 does not need to be connected to the right suction plate assembly 2. When cutting the pole piece 50 and the spare pole piece 60, the output end of the cutter driving assembly 30 only needs to pass through the through hole 22 and then impact the cutter assembly 3 to realize the cutting process of the pole piece 50 and the spare pole piece 60. Compared with the existing automatic pole piece rewinding device, the cutter driving assembly 30 is only used to push the cutter 31 to move to cut the pole piece 50 and the spare pole piece 60. The cutter driving assembly 30 does not need to be used to drive the right suction plate assembly 2 to move to clamp the pole piece 50 and the spare pole piece 60, and does not need to overcome the spring resistance to press the pole piece 50 and the spare pole piece 60. Therefore, the automatic pole piece rewinding device provided in this embodiment can effectively ensure the cutting effect of the pole piece 50 and the spare pole piece 60, thereby improving the success rate and efficiency of the pole piece 50 connecting the tape.

[0049] When the cutter driving assembly 30 is only connected to the cutter assembly 3 during the process of the cutter assembly 3 extending out of the extending slit 21, in order to facilitate the cutter assembly 3 to automatically retract into the cavity 20 when the cutter driving assembly 30 is separated from it, the reset part adopted at the cutter assembly 3 in this embodiment is preferably an elastic part. Specifically, an elastic part is connected between the cutter assembly 3 and the right suction plate assembly 2. The elastic part is used for storing energy when the cutter assembly 3 extends out of the extending slit 21, and for releasing energy when the output end of the cutter driving assembly 30 moves away from the cutter assembly 3.

[0050] The elastic part can adopt a spring such as a compression spring. It should be noted that even during the process of cutting the pole piece 50 and the spare pole piece 60, the cutter driving assembly 30 needs to overcome the resistance of the elastic part to push the cutter assembly 3. However, since the elastic part provided in this embodiment is only used for storing energy during the process of cutting the pole piece 50 and the spare pole piece 60 and does not need to do work when the right suction plate assembly 2 and the left suction plate assembly 1 approach each other to press the pole piece 50, compared with the compression spring resistance overcome by the right suction plate cylinder in the existing automatic pole piece rewinding device, the resistance of the elastic part that the cutter driving assembly 30 in this embodiment needs to overcome is greatly reduced, and the starting resistance of the cutter driving assembly 30 is also smaller, which can ensure that there is enough impact force to cut the pole piece 50 and the spare pole piece 60.

[0051] As Figure 4 and Figure 6 shown, the cutter assembly 3 includes a cutter 31 and a cutter connecting plate 32. The cutter 31 is fixed on one side of the cutter connecting plate 32. The cutter connecting plate 32 is used to drive the cutter 31 to extend out of the extending slit 21 under the drive of the cutter driving assembly 30.

[0052] The cutter 31 is used to cut the pole piece 50 and the spare pole piece 60, and the cutter connecting plate 32 is used to support the cutter 31 so that the cutter 31 can obtain sufficient supporting force.

[0053] Furthermore, the material density of the cutter connecting plate 32 is less than that of the right suction plate assembly 2.

[0054] To ensure the pressing and fitting effect of the pole piece 50 and the spare pole piece 60, the right suction plate assembly 2 is usually made of rigid materials such as metal or alloy. To ensure the cutting effect of the pole piece 50 and the spare pole piece 60, the material of the cutter 31 is usually also selected as rigid materials such as metal or alloy.

[0055] It should be noted that in the pole piece automatic rewinding device disclosed in the existing patent CN205932617U, to ensure the pressing and fitting effect of the pole piece and the spare pole piece, the material of the right suction plate is metal. Thus, when the right suction plate cylinder pushes the right suction plate close to and fit the left suction plate, the right suction plate cylinder not only needs to overcome the resistance of the compression spring, but also needs to overcome the self - gravity of the right suction plate. At this time, the resistance that the right suction plate cylinder needs to overcome is greater, and further reduces the impact force when cutting the pole piece.

[0056] However, the material density of the cutter connecting plate 32 in this embodiment is less than that of the right suction plate assembly 2. Based on this, the cutter connecting plate 32 in this embodiment can be made of light materials such as polyurethane. At this time, the cutter connecting plate 32 can effectively reduce the weight of the cutter assembly 3, making the cutter assembly 3 easier to be pushed and reset. Thus, when the cutter connecting plate 32 is made of light materials, it can further reduce the starting resistance of the cutter driving assembly 30 and effectively ensure the cutting effect of the pole piece 50 and the spare pole piece 60.

[0057] As Figure 4 shown, a contact block 33 is fixed on the side of the cutter connecting plate 32 away from the cutter 31, and the contact block 33 can be connected to the output end of the cutter driving assembly 30.

[0058] Among them, the contact block 33 can be arranged on one side of the through - hole 22 of the right suction plate assembly 2. The contact block 33 is used to shorten the distance between the cutter assembly 3 and the output end of the cutter driving assembly 30, so that the cutter driving assembly 30 can impact and push the cutter assembly 3 more quickly.

[0059] To further reduce the starting resistance of the cutter driving assembly 30, the material density of the contact block 33 can also be less than that of the right suction plate assembly 2. Specifically, in this embodiment, the material of the contact block 33 is preferably polyurethane.

[0060] As Figure 4 and Figure 6 shown, a guide rail assembly 200 is provided between the cutter assembly 3 and the inner wall of the cavity 20, and the cutter assembly 3 is slidably connected to the inside of the cavity 20 through the guide rail assembly 200.

[0061] During the process of the cutter assembly 3 extending out of the extension slot 21 and the process of the cutter assembly 3 resetting, the guide rail assembly 200 can play a guiding role for the cutter assembly 3, effectively improving the accuracy of the moving orientation and the smoothness of the movement of the cutter assembly 3 within the cavity 20.

[0062] When the cutter assembly 3 includes a cutter 31 and a cutter connecting plate 32, the guide rail assembly 200 can be connected between the cutter connecting plate 32 and the inner wall of the cavity 20. At this time, the elastic member can also be installed at the guide rail assembly 200.

[0063] As Figure 5 and Figure 6 shown, the right suction plate assembly 2 includes an upper right suction plate 23, a lower right suction plate 24, and a right suction plate base 25. A cavity 20 is provided inside the right suction plate base 25. The upper right suction plate 23 and the lower right suction plate 24 are both fixed to one side of the right suction plate base 25, and there is a gap between the upper right suction plate 23 and the lower right suction plate 24 to form an extension slot 21.

[0064] To ensure the pressing and fitting effect of the right suction plate assembly 2 on the pole piece 50, the upper right suction plate 23, the lower right suction plate 24, and the right suction plate base 25 can be made of the same material. At this time, the upper right suction plate 23, the lower right suction plate 24, and the right suction plate base 25 can be fixedly connected or integrally formed into a single integral structure.

[0065] In addition, as Figure 4 shown, the right suction plate assembly 2 can also include a right adhesive tape suction plate 26, and the right adhesive tape suction plate 26 is provided on the top of the right suction plate base 25.

[0066] Among them, the upper right suction plate 23, the lower right suction plate 24, and the right adhesive tape suction plate 26 all need to be provided with perforations for vacuum suction operations. During use, vacuum suction operations are performed at the upper right suction plate 23 and the lower right suction plate 24 to adsorb the spare pole piece 60, and vacuum suction operations are performed at the right adhesive tape suction plate 26 to adsorb the tape.

[0067] Correspondingly, the left suction plate assembly 1 can also include an upper left suction plate 10, a lower left suction plate 11, a left suction plate base 12, and a left adhesive tape suction plate 13. The upper left suction plate 10 and the lower left suction plate 11 are both fixed to one side of the left suction plate base 12, and there is a gap between the upper left suction plate 10 and the lower left suction plate 11 to form a cutter slot 14, which is used to accommodate the protruding cutter 31 for cooperating with the cutter 31 to perform cutting operations; the left adhesive tape suction plate 13 is provided on the top of the left suction plate base 12.

[0068] Among them, the upper left suction plate 10, the lower left suction plate 11, and the left adhesive tape suction plate 13 also all need to be provided with perforations for vacuum suction operations. During use, vacuum suction operations are performed at the upper left suction plate 10 and the lower left suction plate 11 to adsorb the pole piece 50, and vacuum suction operations are performed at the left adhesive tape suction plate 13 to adsorb the tape.

[0069] Further, to facilitate the replacement of the tape at the left tape suction plate 13 and the right tape suction plate 26, the left tape suction plate 13 can be slidably connected to the top of the left suction plate seat 12, and the right tape suction plate 26 can be slidably connected to the top of the right suction plate seat 25. It should be noted that in order to enable the tape to stably adhere to the left and right sides of the pole piece 50 and the spare pole piece 60 at the interface of the pole piece 50 and the spare pole piece 60 during the subsequent tape connection process, the left tape suction plate 13 and the right tape suction plate 26 are respectively used to adsorb the non-adhesive side of the tape.

[0070] As Figure 2 and Figure 3 shown, the moving drive assembly 4 includes a right drive assembly 40. A right support structure 400 is provided at the output end of the right drive assembly 40. The right suction plate assembly 2 and the cutter drive assembly 30 are respectively fixedly connected to the right support structure 400.

[0071] The right support structure 400 is used to support the right suction plate assembly 2 and the cutter drive assembly 30. Moreover, the right support structure 400 facilitates the right drive assembly 40 to drive the right suction plate assembly 2 and the cutter drive assembly 30 to move closer to the left suction plate assembly 1 simultaneously, so that after the right suction plate assembly 2 and the left suction plate assembly 1 press the pole piece 50 and the spare pole piece 60, the cutter drive assembly 30 can output a shorter stroke to push the cutter assembly 3 out of the extension slot 21.

[0072] Further, the moving drive assembly 4 further includes a left drive assembly 41. A left support structure 410 is provided at the output end of the left drive assembly 41. The left suction plate assembly 1 is fixedly connected to the left support structure 410.

[0073] The left support structure 410 is used to support the left suction plate assembly 1, which can enable the left suction plate assembly 1 to stably face the right suction plate assembly 2.

[0074] Further, the pole piece automatic tape connection device provided in this embodiment further includes an auxiliary drive assembly 7. An auxiliary drive assembly 7 is connected between the left support structure 410 and the left suction plate assembly 1, or between the right support structure 400 and the right suction plate assembly 2; or an auxiliary drive assembly 7 is respectively connected between the left support structure 410 and the left suction plate assembly 1, and between the right support structure 400 and the right suction plate assembly 2; the auxiliary drive assembly 7 is used to drive the left suction plate assembly 1 and the right suction plate assembly 2 to move closer to or away from each other.

[0075] The left drive assembly 41 and the right drive assembly 40 are used for rough adjustment of the relative movement process between the left suction plate assembly 1 and the right suction plate assembly 2, while the auxiliary drive assembly 7 is used for fine adjustment of the relative movement process between the left suction plate assembly 1 and the right suction plate assembly 2.

[0076] It can be seen that the auxiliary drive assembly 7 can cooperate with the left drive assembly 41 and the right drive assembly 40 to effectively improve the moving efficiency and moving accuracy during the relative movement between the left suction plate assembly 1 and the right suction plate assembly 2.

[0077] In this embodiment, the left drive assembly 41, the right drive assembly 40, and the auxiliary drive assembly 7 can all be selected from telescopic drive devices such as cylinders and oil cylinders.

[0078] It should be noted that since one auxiliary drive assembly 7 can achieve fine adjustment of the relative movement between the left suction plate assembly 1 and the right suction plate assembly 2, the number of auxiliary drive assemblies 7 is preferably one in this embodiment, and as Figure 2 and Figure 3 shown, the auxiliary drive assembly 7 is arranged between the left support structure 410 and the left suction plate assembly 1.

[0079] Furthermore, as Figure 3 shown, the right support structure 400 may include a right sliding plate 4000 and a right support seat 4001. The right sliding plate 4000 is fixed to the output end of the right drive assembly 40, the right support seat 4001 is fixed to one side of the right sliding plate 4000, and the right suction plate seat 25 can be rotatably connected to the right support seat 4001 through a rotating shaft. To prevent the cutter drive assembly 30 from interfering with the process of the right suction plate assembly 2 approaching or separating from the left suction plate assembly 1, the cutter drive assembly 30 can be fixed to the right sliding plate 4000. At this time, the cutter drive assembly 30 and the right suction plate assembly 2 are respectively and independently fixed to the right sliding plate 4000.

[0080] As Figure 3 and Figure 4 shown, a right flipping drive assembly 8 can also be installed on the right sliding plate 4000. The output end of the right flipping drive assembly 8 is connected to the right suction plate seat 25. The right flipping drive assembly 8 is used to drive the right suction plate seat 25 to flip on the right support seat 4001 so that the upper right suction plate 23 and the lower right suction plate 24 face the left suction plate assembly 1, or so that the right adhesive tape suction plate 26 faces the left suction plate assembly 1.

[0081] Correspondingly, the left support structure 410 may include a left sliding plate 4100 and a left support seat 4101. The left sliding plate 4100 is fixed to the output end of the left drive assembly 41, the left support seat 4101 is fixed to one side of the left sliding plate 4100, and the left suction plate seat 12 can be rotatably connected to the left support seat 4101 through a rotating shaft. The auxiliary drive assembly 7 can be fixed to the left sliding plate 4100, and the output end of the auxiliary drive assembly 7 is connected to the left support seat 4101.

[0082] In addition, as Figure 3As shown, a left flipping drive assembly 9 may also be installed on the left sliding plate 4100. The output end of the left flipping drive assembly 9 is connected to the left suction plate seat 12. The left flipping drive assembly 9 is used to drive the left suction plate seat 12 to flip on the left support seat 4101 so that the upper left suction plate 10 and the lower left suction plate 11 face the right suction plate assembly 2, or so that the left adhesive tape suction plate 13 faces the right suction plate assembly 2.

[0083] Among them, both the left flipping drive assembly 9 and the right flipping drive assembly 8 may adopt a rotary drive device formed by combining a telescopic drive and a linkage mechanism. The telescopic drive can be a cylinder, an oil cylinder, etc. Both the left flipping drive assembly 9 and the right flipping drive assembly 8 may also adopt a motor. There is no limitation on the specific structures of the left flipping drive assembly 9 and the right flipping drive assembly 8, as long as the flipping of the left suction plate seat 12 and the right suction plate seat 25 can be realized.

[0084] The following outlines the usage process of the pole piece automatic tape splicing device provided in this embodiment:

[0085] Before using the pole piece automatic tape splicing device provided in this embodiment to splice the pole piece 50 on the pole piece coil 5 and the spare pole piece 60 on the spare coil 6, as Figure 1 shown, the pole piece coil 5 is normally unrolled so that the pole piece 50 on the pole piece coil 5 passes through the gap between the left suction plate assembly 1 and the right suction plate assembly 2 and then bypasses the left idler roller 51. Also, the spare coil 6 is driven to rotate forward for unrolling so that the spare pole piece 60 on the spare coil 6 passes through the gap between the left suction plate assembly 1 and the right suction plate assembly 2 and is fixed on the second take-up shaft 63.

[0086] Then as Figure 2 shown, the left drive assembly 41, the right drive assembly 40, and the auxiliary drive assembly 7 are all in the retracted state. At the same time, the left adhesive tape suction plate 13 is located at the top of the left suction plate assembly 1 and tape is placed on the left adhesive tape suction plate 13 manually. Also, the right adhesive tape suction plate 26 is located at the top of the right suction plate assembly 2 and tape is placed on the right adhesive tape suction plate 26 manually. Then, by using the equipped vacuum suction mechanism, a vacuum is created on the surfaces of the left adhesive tape suction plate 13 and the right adhesive tape suction plate 26, so as to firmly adsorb the tape on the left adhesive tape suction plate 13 and the right adhesive tape suction plate 26.

[0087] Subsequently, the left drive assembly 41, the right drive assembly 40, and the auxiliary drive assembly 7 are activated to push the left suction plate assembly 1 and the right suction plate assembly 2 to the positions of the pole piece 50 and the spare pole piece 60 and clamp the pole piece 50 and the spare pole piece 60. Then, a vacuum is applied to the upper left suction plate 10 and the lower left suction plate 11 to suck the pole piece 50, and a vacuum is applied to the upper right suction plate 23 and the lower right suction plate 24 to suck the spare pole piece 60. Then, the cutter drive assembly 30 is activated, so that the output end of the cutter drive assembly 30 extends and impacts the abutting block 33. After the abutting block 33 is impacted, the cutter connecting plate 32 will push the cutter 31 to extend from the extending slit 21, thereby cutting off the spare pole piece 60 and the pole piece 50. Subsequently, the cutter drive assembly 30 is retracted, so that the elastic member releases energy and drives the cutter 31 to retract into the cavity 20.

[0088] Subsequently, the auxiliary drive assembly 7 is retracted, and the upper right suction plate 23 and the lower left suction plate 11 are broken vacuum. At this time, the discarded lower pole piece 50 on the pole piece coil 5 is taken away by the reversely rotating pole piece coil 5, and the discarded head on the upper side of the spare coil 6 is taken away by the reversely rotating second take-up shaft 63. After taking away the discarded lower left pole piece 50 and the head of the upper right spare pole piece 60, the auxiliary drive assembly 7 is activated again, so that the output end of the auxiliary drive assembly 7 extends to push the left suction plate assembly 1 and the right suction plate assembly 2 to fit together. Then, the lower left suction plate 11 is evacuated and the lower right suction plate 24 is disconnected from the vacuum. At this time, the lower left suction plate 11 sucks the lower side of the spare pole piece 60. The right flipping drive assembly 8 is activated, so that the right suction plate seat 25 flips 90° on the right support seat 4001 to make the right adhesive tape suction plate 26 face the upper left suction plate 10 and the lower left suction plate 11. Then, the right drive assembly 40 is activated continuously, so that the output end of the right drive assembly 40 continues to extend, thereby pasting the tape on the right adhesive tape suction plate 26 to the right side of the pole piece 50 and the spare pole piece 60. Subsequently, the upper right suction plate 23 and the lower right suction plate 24 are both evacuated, and the upper left suction plate 10 and the lower left suction plate 11 are both disconnected from the vacuum. Then, the auxiliary drive assembly 7 is used to drive the left suction plate assembly 1 to move away from the right suction plate assembly 2. Then, the left flipping drive assembly 9 is activated, so that the left suction plate seat 12 flips 90° on the left support seat 4101 to make the left adhesive tape suction plate 13 face the upper right suction plate 23 and the lower right suction plate 24. Then, the auxiliary drive assembly 7 or the left drive assembly 41 is activated to paste the tape on the left adhesive tape suction plate 13 to the left side of the pole piece 50 and the spare pole piece 60. Thus, the entire tape pasting process of the pole piece 50 and the spare pole piece 60 can be realized.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic pole piece tape connection device, characterized in that: It comprises a left suction plate assembly (1), a right suction plate assembly (2), a cutter assembly (3), a moving drive assembly (4) and a cutter drive assembly (30); The left suction plate assembly (1) and the right suction plate assembly (2) are arranged opposite to each other, the left suction plate assembly (1) and / or the right suction plate assembly (2) are connected to the output end of the moving drive assembly (4), and the moving drive assembly (4) is used to drive the left suction plate assembly (1) and the right suction plate assembly (2) to move closer to each other or away from each other; A cavity (20) is provided inside the right suction plate assembly (2); a protruding slit (21) connected to the cavity (20) is provided on a side of the right suction plate assembly (2) facing the left suction plate assembly (1); the cutter assembly (3) is arranged in the cavity (20); and an output end of the cutter drive assembly (30) can be connected to the cutter assembly (3) so as to drive the cutter assembly (3) to protrude out of the protruding slit (21).

2. The automatic pole piece splicing device according to claim 1, characterized in that: A through opening (22) communicating with the cavity (20) is provided on a side of the right suction plate assembly (2) facing away from the left suction plate assembly (1); an output end of the cutter drive assembly (30) is located on one side of the through opening (22); and the output end of the cutter drive assembly (30) is capable of passing through the through opening (22) and pushing the cutter assembly (3) to extend out of the extension slot (21).

3. The automatic pole piece splicing device according to claim 2, characterized in that: An elastic member is connected between the cutter assembly (3) and the right suction plate assembly (2), and the elastic member is used to store energy when the cutter assembly (3) extends out of the extension slot (21), and to release energy when the output end of the cutter drive assembly (30) is away from the cutter assembly (3).

4. The automatic pole piece splicing device according to claim 1, characterized in that: The cutter assembly (3) comprises a cutter (31) and a cutter connecting plate (32); the cutter (31) is fixed to one side of the cutter connecting plate (32); and the cutter connecting plate (32) is used to drive the cutter (31) to extend out of the extension slot (21) under the drive of the cutter driving assembly (30).

5. The automatic pole piece splicing device according to claim 4, characterized in that: The material density of the cutter connecting plate (32) is less than the material density of the right suction plate assembly (2).

6. The automatic pole piece splicing device according to any one of claims 1 to 5, characterized in that: A guide rail assembly (200) is provided between the cutter assembly (3) and the inner wall of the cavity (20), and the cutter assembly (3) is slidably connected to the interior of the cavity (20) via the guide rail assembly (200).

7. The automatic pole piece splicing device according to any one of claims 1 to 5, characterized in that: The right suction plate assembly (2) comprises a right upper suction plate (23), a right lower suction plate (24) and a right suction plate seat (25); the cavity (20) is provided inside the right suction plate seat (25); the right upper suction plate (23) and the right lower suction plate (24) are both fixed to one side of the right suction plate seat (25); and a gap is provided between the right upper suction plate (23) and the right lower suction plate (24) to form the extension slot (21).

8. The automatic pole piece splicing device according to any one of claims 1 to 5, characterized in that: The mobile drive assembly (4) comprises a right drive assembly (40), the output end of the right drive assembly (40) is provided with a right support structure (400), and the right suction plate assembly (2) and the cutter drive assembly (30) are respectively fixedly connected to the right support structure (400).

9. The automatic pole piece splicing device according to claim 8, characterized in that: The mobile drive assembly (4) further comprises a left drive assembly (41), the output end of the left drive assembly (41) is provided with a left support structure (410), and the left suction plate assembly (1) is fixedly connected to the left support structure (410).

10. The automatic pole piece splicing device according to claim 9, characterized in that: The invention also comprises an auxiliary driving component (7), which is connected between the left supporting structure (410) and the left suction plate component (1), and / or between the right supporting structure (400) and the right suction plate component (2), and is used to drive the left suction plate component (1) and the right suction plate component (2) to move towards or away from each other.

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