Roller device and die cutting machine

Abstract

The present application provides a roller device and a die-cutting machine, the roller device comprises a central shaft and a roller pressing assembly; the roller pressing assembly is sleeved on the central shaft; the roller pressing assembly comprises a protective tube, a roller pressing tube, a first rotating bearing component, a second rotating bearing component and a plurality of rubber rings, the outer peripheral wall of the protective tube is formed with a smooth surface; the inner wall of the roller pressing tube is rotatably connected to the central shaft, the outer wall of the roller pressing tube is provided with a plurality of grooves, each rubber ring is sleeved in a groove, so that the inner ring of each rubber ring is connected to the roller pressing tube, the outer rings of the plurality of rubber rings are connected to the inner wall of the protective tube, the inner rings of the first rotating bearing component and the second rotating bearing component are rotatably connected to the central shaft, and the outer rings of the first rotating bearing component and the second rotating bearing component are respectively sleeved on the inner rings at both ends of the roller pressing tube.

Description

Technical Field

[0001] The invention relates to the field of die-cutting of positive and negative electrode sheets of lithium-ion batteries, and in particular to a roller device and a die-cutting machine. Background Art

[0002] With the development of new energy technology, the demand for lithium batteries is increasing day by day. Lithium-ion batteries are composed of lithium-ion cells, electrolytes, protection circuits and outer shells. The cells are composed of positive electrodes, negative electrodes and separators. The components of the positive electrode are positive electrode materials + conductive agents + adhesives + current collectors, and the components of the negative electrode are graphite + conductive agents + thickeners + adhesives + current collectors. The positive and negative electrodes are generally called battery pole sheets in the industry. In order to improve the density and thickness consistency of the battery pole sheet surface materials, the positive and negative pole sheets must be rolled after the coating process. This process is called die-cutting of battery pole sheets.

[0003] When the pole piece is die-cut, a large roll of pole piece is first unwound through the unwinding shaft of the die-cutting machine equipment, and then the pole piece passes through several rollers on the die-cutting machine to generate a certain tension, and finally sent to the die-cutting machine die area, and then cut by the die-cutting die into the shape and size required by the model and process. The traditional roller is made of aluminum, and there is only a layer of oxide layer on the surface of the roller. The pole piece will produce a lot of friction with the roller during the belt conveying process. After the oxide layer is worn off, the pole piece will continue to rub against the aluminum roller. Since the hardness of aluminum is very low, the friction between the pole piece and the aluminum roller is very large. Therefore, during the friction between the pole piece and the aluminum roller, a lot of metal powder will be generated on the aluminum roller. The metal powder remains in the pole piece or the battery cell, which will cause low voltage to the battery cell. At the same time, the aluminum roller must be removed for outer circle grinding, and then surface oxidation treatment is performed after grinding. Only after repair can it be used normally. However, each grinding reduces the service life of the roller, resulting in a low service life of the aluminum roller. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a roller device and a die-cutting machine which have reduced wear and tear and have a longer service life.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A roller device comprises a central shaft and a roller pressing assembly; the roller pressing assembly is sleeved on the central shaft;

[0007] The rolling assembly includes a protective tube, a rolling tube, a first rotating bearing component, a second rotating bearing component and a plurality of rubber rings. The outer peripheral wall of the protective tube is formed with a smooth surface. The inner wall of the rolling tube is rotatably connected to the central axis. The outer wall of the rolling tube is provided with a plurality of slots. Each of the rubber rings is sleeved in a slot so that the inner ring of each of the rubber rings is connected to the rolling tube. The outer rings of the plurality of rubber rings are connected to the inner wall of the protective tube. The inner rings of the first rotating bearing component and the second rotating bearing component are rotatably connected to the central axis, and the outer rings of the first rotating bearing component and the second rotating bearing component are respectively sleeved on the inner rings at both ends of the rolling tube.

[0008] In one embodiment, the protection tube is an integrally formed glass tube or ceramic tube.

[0009] In one embodiment, the rolled tube is an integrally formed structure.

[0010] In one embodiment, there is a gap between the inner diameter of the protective tube and the outer diameter of the rolled tube.

[0011] In one embodiment, the rolling assembly further includes a first fixing member and a second fixing member, both of which are sleeved on the central axis, the first fixing member being respectively connected to one end of the protective tube, one end of the rolling tube and the first rotating bearing member, and the second fixing member being respectively connected to the other end of the protective tube, the other end of the rolling tube and the second rotating bearing member.

[0012] In one of the embodiments, the roller device further includes a tension adjustment component, and the tension adjustment component is sleeved on the central shaft.

[0013] In one embodiment, the number of the tension adjustment components is two, namely the first tension adjustment component and the second tension adjustment component. The first tension adjustment component is connected to the first fixing member, and the second tension adjustment component is connected to the second fixing member.

[0014] In one embodiment, the first tension adjustment assembly includes a first threaded screen, a first spring and a first nut, the first threaded screen is sleeved on the central axis, one end of the first threaded screen is connected to the first fixing member, the other end of the first threaded screen is rotatably connected to the first nut, the first spring is sleeved on the first threaded screen, one end of the first spring is connected to the first fixing member, and the other end of the first spring is connected to the first nut.

[0015] In one embodiment, the second tension adjustment assembly includes a second threaded screen, a second spring and a second nut, the second threaded screen is sleeved on the central axis, two ends of the second threaded screen are connected to the second fixing member, the other two ends of the second threaded screen are rotatably connected to the second nut, the second spring is sleeved on the second threaded screen, two ends of the second spring are connected to the second fixing member, and the other two ends of the second spring are connected to the second nut.

[0016] A die-cutting machine comprises the roller device described in any one of the above embodiments.

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] 1. The roller device of the present application drives the roller tube to rotate through the first rotating bearing and the second rotating bearing, and a protective tube is sleeved on the roller tube so that the roller tube will not contact with the pole piece and cause wear during the rolling operation, but the contact between the protective tube and the pole piece, and the surface of the protective tube is relatively smooth, which can effectively reduce the friction generated by the contact with the pole piece, thereby effectively reducing the wear of the roller device, thereby effectively improving the service life of the roller device. Furthermore, by using a non-metallic protective tube, when it contacts and squeezes the pole piece, it will not produce metal powder that affects the low voltage of the battery cell, which effectively ensures the product quality while greatly reducing the maintenance cost of the roller device.

[0019] 2. The roller device of the present application is provided with multiple rubber rings which are sleeved on the rolling tube, and the outer rings of the multiple rubber rings are tightly attached to the inner wall of the protective tube, so as to avoid the roller tube and the protective tube from being contacted and squeezed during the rolling process, so as to prevent the protective tube from being broken. At the same time, the rubber ring also plays a buffering role, which can effectively reduce the squeezing force on the protective tube during the rolling process, effectively reduce the wear of the protective tube, and further improve the service life of the roller device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the structure of a roller device before explosion in one embodiment;

[0022] Figure 2 This is a schematic diagram of part of the structure of the roller device after the explosion;

[0023] Figure 3 This is a schematic diagram of part of the structure of the roller device after the explosion;

[0024] Figure 4 This is a schematic diagram of part of the structure of the roller device after the explosion;

[0025] Figure 5 This is a schematic diagram of part of the structure of the roller device after the explosion;

[0026] Figure 6 This is a schematic diagram of part of the structure after the roller device exploded. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0028] It should be noted that when an element is referred to as being "fixed to" 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", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] The roller device provided in the present application includes a central axis and a rolling assembly; the rolling assembly is sleeved on the central axis; the rolling assembly includes a protective tube, a rolling tube, a first rotating bearing member, a second rotating bearing member and a plurality of rubber rings, and the outer peripheral wall of the protective tube is formed with a smooth surface; the inner wall of the rolling tube is rotatably connected to the central axis, and the outer wall of the rolling tube is provided with a plurality of grooves, each rubber ring is sleeved in a groove, so that the inner ring of each rubber ring is connected to the rolling tube, and the outer rings of the plurality of rubber rings are connected to the inner wall of the protective tube, the inner rings of the first rotating bearing member and the second rotating bearing member are rotatably connected to the central axis, and the outer rings of the first rotating bearing member and the second rotating bearing member are respectively connected to the two ends of the protective tube and the two ends of the rolling tube.

[0031] See also Figures 1 to 6In order to better understand the roller device 10 of the present application, the roller device 10 is further explained below:

[0032] The roller device 10 of one embodiment includes a central shaft 100 and a roller assembly 200; the roller assembly 200 is sleeved on the central shaft 100; the roller assembly 200 includes a protection tube 210, a roller tube 220, a first rotating bearing component 230, a second rotating bearing component 240 and a plurality of rubber rings 250, and the outer peripheral wall of the protection tube 210 is formed with a smooth surface; the inner wall of the roller tube 220 is rotatably connected to the central shaft 100, and the outer wall of the roller tube 220 is provided with a plurality of slots 222, each rubber ring 250 is sleeved in a slot 222, so that the inner ring of each rubber ring 250 is connected to the roller tube 220, and the outer rings of the plurality of rubber rings 250 are connected to the inner wall of the protection tube 210, the inner rings of the first rotating bearing component 230 and the second rotating bearing component 240 are rotatably connected to the central shaft 100, and the outer rings of the first rotating bearing component 230 and the second rotating bearing component 240 are respectively sleeved on the inner rings at both ends of the roller tube 220. Since the traditional roller is made of aluminum, there is only one oxide layer on the surface of the roller, and the pole piece will have a lot of friction with the roller during the tape running process. After the oxide layer is worn off, the pole piece will continue to rub against the aluminum roller. Since the hardness of aluminum is very low, the friction between the pole piece and the aluminum roller is very large. Therefore, during the friction between the pole piece and the aluminum roller, a lot of metal powder will be generated on the aluminum roller. The metal powder remains in the pole piece or the battery cell, which will cause low voltage to the battery cell. At the same time, the aluminum roller must be removed for outer circle grinding, and then surface oxidation treatment is performed after grinding. Only after this repair can it be used normally. However, each grinding reduces the service life of the roller, resulting in a lower service life of the aluminum roller. Therefore, in the present embodiment, the roughness value RA of the smooth surface of the protection tube 210 is 0 to 0.05, so that the surface of the protection tube 210 is relatively smooth; the rolling tube 220 is driven to rotate by the first rotating bearing and the second rotating bearing, and the protection tube 210 is sleeved on the rolling tube 220, so that the rolling tube 220 will not contact with the pole piece to generate wear during the rolling operation, but through the contact between the protection tube 210 and the pole piece, and the surface of the protection tube 210 is relatively smooth, it can effectively reduce the friction generated by the contact with the pole piece, and then effectively reduce the wear of the roller device 10, thereby effectively improving the service life of the roller device 10. Specifically, by using a non-metallic protection tube 210, when it contacts and squeezes the pole piece, it will not generate metal powder that affects the low voltage of the battery cell, which effectively ensures the product quality and greatly reduces the maintenance cost of the roller device 10.Furthermore, by providing a plurality of rubber rings 250 which are sleeved on the rolling tube 220, and the outer rings of the plurality of rubber rings 250 are tightly attached to the inner wall of the protective tube 210, it is avoided that the rolling tube 220 and the protective tube 210 are in contact and squeezed with each other during the rolling process, so that the protective tube 210 is not broken. At the same time, the rubber ring 250 also plays a buffering role, which can effectively reduce the squeezing force on the protective tube 210 during the rolling process, effectively reduce the wear of the protective tube 210, and further improve the service life of the roller device 10.

[0033] like Figure 1 As shown, in one embodiment, the protective tube 210 is an integrally formed glass tube or ceramic tube. It should be noted that the hardness of the protective tube 210 made of glass or ceramic material is quite high and is not easily worn by the pole piece. Therefore, the service life of the protective tube 210 made of glass or ceramic material is very long. The cost of repair and maintenance of the roller device 10 can be greatly reduced and the utilization rate of the roller device 10 can be increased. Specifically, the glass tube or ceramic tube will not produce metal powder when rubbing against the pole piece. The metal powder will not enter the pole piece or the battery to cause low voltage to the battery cell. Even if the pole piece rubs against the glass tube or ceramic tube, causing the glass tube or ceramic tube to be worn into powder, such powder is very, very small, and it is not metal powder. Such powder will not conduct electricity, and entering the pole piece or the battery will not cause poor quality to the battery cell. Further, the glass tube or ceramic tube is processed by an integral molding process, so that the protective tube 210 is not only high in hardness, but also has good structural stability, and can be well adapted to the needs of mass production of die-cutting machines.

[0034] like Figure 3 As shown, in one embodiment, the rolling tube 220 is an integrally formed structure. It should be noted that the rolling tube 220 can be a metal tube, and the metal tube processed by the integrally formed process has good structural stability, and the heavy weight of the metal tube can be well adapted to the first rotating bearing and the second rotating bearing, so that the rolling operation of the roller device 10 is more stable.

[0035] like Figures 1 to 4 As shown, in one embodiment, there is a gap between the inner diameter of the protection tube 210 and the outer diameter of the rolling tube 220. It should be noted that the material of the protection tube 210 is glass or ceramic, while the material of the rolling tube 220 is metal. The two are easily broken by contact and extrusion, so the inner diameter of the protection tube 210 is larger than the outer diameter of the rolling tube 220. Then, a plurality of rubber rings 250 are sleeved on the rolling tube 220, so that the protection tube 210 will not contact the rolling tube 220, thereby avoiding the situation where the protection tube 210 and the rolling tube 220 are in contact with each other. Specifically, the outer diameter of the rubber ring 250 is just tightly matched with the inner diameter of the protection tube 210, so the rolling tube 220 and the protection tube 210 can maintain synchronization during the rolling operation.

[0036] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, in one embodiment, the rolling assembly 200 further includes a first fixing member 260 and a second fixing member 270, both of which are sleeved on the central shaft 100, and the first fixing member 260 is respectively connected to one end of the protection tube 210, one end of the rolling tube 220 and the first rotating bearing member 230, and the second fixing member 270 is respectively connected to the other end of the protection tube 210, the other end of the rolling tube 220 and the second rotating bearing member 240. It can be understood that the connection between the rolling assembly 200 and the central shaft 100 is more stable through the first fixing member 260 and the second fixing member 270, and the first fixing member 260 is connected to the first rotating bearing member 230, and the second fixing member 270 is connected to the second rotating bearing member 240, so that the structural stability of the rolling assembly 200 during rolling operation is better, so there will be no situation where the shaking of the roller assembly affects the rolling effect.

[0037] like Figure 1 As shown, in one embodiment, the roller device 10 further includes a tension adjustment component 300, and the tension adjustment component 300 is sleeved on the central shaft 100. It should be noted that the tension adjustment component 300 can adjust the rotation speed of the roller device 10 according to the wrinkling of the pole piece, thereby reducing the wrinkling of the pole piece. Specifically, when the pole piece is wrinkled, the tension adjustment component 300 can be used to increase the resistance of the roller device 10, so that the rotation speed of the roller device 10 slows down, so that the tension of the pole piece belt will increase, thereby reducing the wrinkling of the pole piece. When the pole piece is not wrinkled, the tension adjustment component 300 can be used to reduce the resistance of the roller device 10, so that the rotation speed of the roller device 10 is accelerated, and the tension of the pole piece belt is reduced, thereby reducing the friction of the roller device 10 on the pole piece, thereby reducing the powder generated by friction. Therefore, the friction between the roller device 10 and the pole piece can be reduced by the tension adjustment component 300, thereby effectively reducing the wear of the roller device 10 and effectively improving the service life of the roller device 10.

[0038] like Figure 2As shown, in one embodiment, there are two tension adjustment components 300, namely, a first tension adjustment component 300a and a second tension adjustment component 300b, wherein the first tension adjustment component 300a is connected to the first fixing member 260, and the second tension adjustment component 300b is connected to the second fixing member 270. It should be noted that the tension adjustment component 300 adjusts the rotation speed of the roller device 10 by controlling the rotating bearing component, and because the roller device 10 has the first rotating bearing component 230 and the second rotating bearing component 240, the number of tension adjustment components 300 required is two, namely, the first tension adjustment component 300a and the second tension adjustment component 300b.

[0039] like Figure 6 As shown, in one embodiment, the first tension adjustment component 300a includes a first threaded screen 310a, a first spring 320a and a first nut 330a, the first threaded screen 310a is sleeved on the central axis 100, one end of the first threaded screen 310a is connected to the first fixing member 260, and the other end of the first threaded screen 310a is rotatably connected to the first nut 330a, the first spring 320a is sleeved on the first threaded screen 310a, one end of the first spring 320a is connected to the first fixing member 260, and the other end of the first spring 320a is connected to the first nut 330a. It should be noted that when the first nut 330a is twisted in the first threaded screen 310a toward the direction close to the first fixing member 260, the first nut 330a squeezes the first spring 320a, so that the first fixing member 260 is squeezed by the first spring 320a, and then the first fixing member 260 squeezes the first rotating bearing member 230, that is, the friction between the first fixing member 260 and the first rotating bearing member 230 is increased, thereby reducing the rotation speed of the first rotating bearing member 230, and further reducing the rotation speed of the roller device 10. Similarly, when the first nut 330a is twisted in the first threaded screen 310a toward the direction away from the first fixing member 260, the first spring 320a is gradually reset, and the squeezing force on the first fixing member 260 is gradually reduced, thereby reducing the friction between the first fixing member 260 and the first rotating bearing member 230, thereby increasing the rotation speed of the first rotating bearing member 230, and further increasing the rotation speed of the roller device 10.

[0040] Furthermore, when the pole piece is wrinkled, the resistance of the first rotating bearing member 230 can be increased by the first nut 330a, so that the rotation speed of the roller device 10 becomes slower, so that the tension of the pole piece during tape movement becomes larger, thereby reducing the wrinkling of the pole piece. When the pole piece is not wrinkled, the resistance of the first rotating bearing member 230 can be reduced by the first nut 330a, so that the rotation speed of the roller device 10 becomes faster, and the tension of the pole piece during tape movement becomes smaller, thereby reducing the friction of the roller device 10 on the pole piece, thereby reducing the powder generated by the friction. Therefore, by adjusting the first nut 330a, the friction between the roller device 10 and the pole piece can be reduced, thereby effectively reducing the wear of the roller device 10 and effectively increasing the service life of the roller device 10. Figure 6 As shown, in one embodiment, the second tension adjustment component 300b includes a second threaded screen 310b, a second spring 320b and a second nut 330b, the second threaded screen 310b is sleeved on the central axis 100, two ends of the second threaded screen 310b are connected to the second fixing member 270, and the other two ends of the second threaded screen 310b are rotatably connected to the second nut 330b, the second spring 320b is sleeved on the second threaded screen 310b, two ends of the second spring 320b are connected to the second fixing member 270, and the other two ends of the second spring 320b are connected to the second nut 330b. It should be noted that when the second nut 330b is twisted in the direction close to the second fixing member 270 in the second threaded screen 310b, the second nut 330b squeezes the second spring 320b and also squeezes the second fixing member 270 through the second spring 320b, and then squeezes the second rotating bearing member 240 through the second fixing member 270, that is, the friction between the second fixing member 270 and the second rotating bearing member 240 is increased, thereby reducing the rotation speed of the second rotating bearing member 240, and further reducing the rotation speed of the roller device 10. Similarly, when the second nut 330b is twisted in the direction away from the second fixing member 270 in the second threaded screen 310b, the second spring 320b is gradually reset and the squeezing force on the second fixing member 270 is gradually reduced, thereby reducing the friction between the second fixing member 270 and the second rotating bearing member 240, thereby increasing the rotation speed of the second rotating bearing member 240, and further increasing the rotation speed of the roller device 10.

[0041] Furthermore, when the pole piece is wrinkled, the resistance of the second rotating bearing member 240 can be increased by the second nut 330b, so that the speed of the roller device 10 is slowed down, so that the tension of the pole piece during tape running will be increased, thereby reducing the wrinkling of the pole piece. When the pole piece is not wrinkled, the resistance of the second rotating bearing member 240 can be reduced by the second nut 330b, so that the speed of the roller device 10 is accelerated, and the tension of the pole piece during tape running is reduced, thereby reducing the friction of the roller device 10 on the pole piece, thereby reducing the powder generated by friction. Therefore, by adjusting the first nut 330a, the friction between the roller device 10 and the pole piece can be reduced, thereby effectively reducing the wear of the roller device 10 and effectively improving the service life of the roller device 10.

[0042] Furthermore, the over-roll device 10 also includes a pole piece tension detection mechanism and an alarm. The pole piece tension detection mechanism includes a controller and a tension sensor. The tension sensor elastically abuts against the pole piece. The tension sensor is electrically connected to the controller, and the controller is also electrically connected to the alarm. When the pole piece is wrinkled, the tension sensor senses that the tension of the pole piece is lower than a preset value, and the controller generates an alarm signal to make the alarm sound to remind the user to adjust the first tension adjustment component 300a and the second tension adjustment component 300b. In this way, the problem of pole piece wrinkling can be dealt with in a timely and effective manner, thereby ensuring the qualified rate of pole piece production.

[0043] Furthermore, the tension sensor is a pressure sensor for sensing the tension of the electrode; further, the tension sensor includes a sensor body and an elastic contact part, the sensing end of the sensor body is connected to the elastic contact part, the elastic contact part abuts against the surface of the electrode, so that the tension sensor elastically abuts against the electrode. Further, the tension sensor is arranged adjacent to the rolling assembly 200; wherein when the electrode in the rolling working area of ​​the rolling assembly 200 is wrinkled, that is, the tension decreases, the tension sensor can accurately sense the change in the tension value of the electrode at the first time, and the controller generates an alarm signal, so that the alarm alarms, and can timely remind the user to adjust the first tension adjustment component 300a and the second tension adjustment component 300b, thereby effectively avoiding the wrinkling of the electrode, thereby improving the qualified rate of the electrode production, and at the same time can ensure the contact friction stability between the protection tube and the electrode, reduce the wear of the protection tube due to the change of the contact extrusion force, thereby effectively improving the service life of the roller device. In this embodiment, the elastic resistance part is an elastic rubber block, so that the elastic resistance part has good elasticity and prevents the tension sensor from damaging the pole piece.

[0044] The present application also provides a die-cutting machine, including a roller device as described in any of the above embodiments. In this embodiment, the roller device drives the rolling tube to rotate through the first rotating bearing and the second rotating bearing, and a protective tube is sleeved on the rolling tube, so that the rolling tube will not contact with the pole piece and cause wear during the rolling operation, but through the contact between the protective tube and the pole piece, and the surface of the protective tube is relatively smooth, which can effectively reduce the friction generated by the contact with the pole piece, thereby effectively reducing the wear of the roller device, thereby effectively improving the service life of the roller device. Furthermore, by using a protective tube made of a glass tube or a ceramic tube, when the protective tube contacts and squeezes the pole piece, no metal powder that affects the low voltage of the battery cell will be generated, which effectively ensures the product quality while greatly reducing the maintenance cost of the roller device, thereby effectively improving the production efficiency of the die-cutting machine. The roller device is provided with multiple rubber rings which are sleeved on the rolling tube, and the outer rings of the multiple rubber rings are tightly attached to the inner wall of the protective tube, so as to avoid the rolling tube and the protective tube from being contacted and squeezed during the rolling process, so as to prevent the protective tube from being broken. At the same time, the rubber ring also plays a buffering role, which can effectively reduce the squeezing force on the protective tube during the rolling process, effectively reduce the wear of the protective tube, and further improve the service life of the roller device.

[0045] Furthermore, when the pole piece is wrinkled, the resistance of the first rotating bearing member and the second rotating bearing member can be increased by the first nut and the second nut, so that the speed of the roller device is slowed down, so that the tension of the pole piece during tape running will be increased, thereby reducing the wrinkling of the pole piece. When the pole piece is not wrinkled, the resistance of the first rotating bearing member and the second rotating bearing member can be reduced by the first nut and the second nut, so that the speed of the roller device is increased, and the tension of the pole piece during tape running is reduced, thereby reducing the friction of the roller device on the pole piece, thereby reducing the powder generated by friction, so the friction between the roller device and the pole piece can be reduced by adjusting the first nut, thereby effectively reducing the wear of the roller device and effectively improving the service life of the roller device. Therefore, the die-cutting machine can adjust different roller speeds according to different pole pieces to avoid the wrinkling of the pole piece and affect the work efficiency, thereby effectively improving the work efficiency and adaptability of the die-cutting machine.

[0046] Furthermore, the die-cutting machine also includes a die-cutting mounting seat, and the central axis is rotatably connected to the die-cutting mounting seat. Furthermore, the die-cutting mounting seat includes a seat body and an adjustment seat, the adjustment seat is slidably connected to the seat body, and the connection position between the adjustment seat and the seat body is adjustable, and the central axis is rotatably connected to the adjustment seat. When the pole piece is wrinkled, the adjustment seat can be adjusted in a first direction, so that the tension of the pole piece is increased when passing the roller, thereby making the pole piece run more smoothly. When the pole piece is not wrinkled, the adjustment seat can be adjusted in a second direction, so that you can effectively improve the rolling effect of the pole piece, that is, effectively improve the flatness of the pole piece, and improve the quality of the pole piece. Furthermore, the die-cutting mounting seat also includes a screw adjustment mechanism, which includes an adjusting screw and a nut. The adjusting screw is rotatably connected to the seat body, the nut is fixed on the adjusting seat, and the nut is sleeved on the adjusting screw. When the connection position of the adjusting seat and the seat body needs to be adjusted, the adjusting screw is rotated to adapt to the extrusion force of the adjusting protective tube when it is in contact and extrusion with the pole piece, thereby avoiding the problem of poor pole piece rolling quality caused by excessive or insufficient contact and extrusion of the protective tube with the pole piece. At the same time, it can ensure the contact friction stability between the protective tube and the pole piece, reduce the wear of the protective tube due to changes in the contact extrusion force, thereby effectively improving the service life of the roller device.

[0047] Compared with the prior art, the present invention has at least the following advantages:

[0048] 1. The roller device of the present application drives the roller tube to rotate through the first rotating bearing and the second rotating bearing, and a protective tube is sleeved on the roller tube so that the roller tube will not contact with the pole piece and cause wear during the rolling operation, but the contact between the protective tube and the pole piece, and the surface of the protective tube is relatively smooth, which can effectively reduce the friction generated by the contact with the pole piece, thereby effectively reducing the wear of the roller device, thereby effectively improving the service life of the roller device. Furthermore, by using a non-metallic protective tube, when it contacts and squeezes the pole piece, it will not produce metal powder that affects the low voltage of the battery cell, which effectively ensures the product quality while greatly reducing the maintenance cost of the roller device.

[0049] 2. The roller device of the present application is provided with multiple rubber rings which are sleeved on the rolling tube, and the outer rings of the multiple rubber rings are tightly attached to the inner wall of the protective tube, so as to avoid the roller tube and the protective tube from being contacted and squeezed during the rolling process, so as to prevent the protective tube from being broken. At the same time, the rubber ring also plays a buffering role, which can effectively reduce the squeezing force on the protective tube during the rolling process, effectively reduce the wear of the protective tube, and further improve the service life of the roller device.

[0050] 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 roller device, characterized in that: It includes a central shaft and a rolling assembly; the rolling assembly is sleeved on the central shaft; The rolling assembly comprises a protection tube, a rolling tube, a first rotating bearing component, a second rotating bearing component and a plurality of rubber rings, the outer peripheral wall of the protection tube is formed with a smooth surface; the inner wall of the rolling tube is rotatably connected to the central axis, the outer wall of the rolling tube is provided with a plurality of slots, each of the rubber rings is sleeved in one of the slots, so that the inner ring of each of the rubber rings is connected to the rolling tube, the outer rings of the plurality of rubber rings are connected to the inner wall of the protection tube, the inner rings of the first rotating bearing component and the second rotating bearing component are rotatably connected to the central axis, and the outer rings of the first rotating bearing component and the second rotating bearing component are respectively sleeved on the inner rings at both ends of the rolling tube; The rolling assembly further comprises a first fixing member and a second fixing member, wherein the first fixing member and the second fixing member are both sleeved on the central axis, the first fixing member is respectively connected to one end of the protection tube, one end of the rolling tube and the first rotating bearing member, and the second fixing member is respectively connected to the other end of the protection tube, the other end of the rolling tube and the second rotating bearing member; The roller device further includes a tension adjustment component, and the number of the tension adjustment components is two, namely the first tension adjustment component and the second tension adjustment component; The first tension adjustment assembly includes a first threaded screen, a first spring and a first nut, wherein the first threaded screen is sleeved on the central shaft, one end of the first threaded screen is connected to the first fixing member, and the other end of the first threaded screen is rotatably connected to the first nut, the first spring is sleeved on the first threaded screen, one end of the first spring is connected to the first fixing member, and the other end of the first spring is connected to the first nut; The second tension adjustment assembly includes a second threaded screen, a second spring and a second nut, the second threaded screen is sleeved on the central shaft, two ends of the second threaded screen are connected to the second fixing member, the other two ends of the second threaded screen are rotatably connected to the second nut, the second spring is sleeved on the second threaded screen, two ends of the second spring are connected to the second fixing member, and the other two ends of the second spring are connected to the second nut; The roller device further comprises a pole piece tension detection mechanism and an alarm, wherein the pole piece tension detection mechanism comprises a controller and a tension sensor, wherein the tension sensor elastically abuts against the pole piece, the tension sensor is electrically connected to the controller, and the controller is also electrically connected to the alarm; The tension sensor is a pressure sensor, which is used to sense the tension of the pole piece.

2. The roller device according to claim 1, characterized in that: The protection tube is an integrally formed glass tube or ceramic tube.

3. The roller device according to claim 2, characterized in that: The rolled tube is an integrally formed structure.

4. The roller device according to claim 2, characterized in that: There is a gap between the inner diameter of the protection tube and the outer diameter of the rolled tube.

5. A die-cutting machine, characterized in that: The invention comprises the roller device as described in any one of claims 1 to 4.

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