A reeling mechanism

Abstract

The invention discloses an unwinding mechanism, which belongs to a pole piece die-cutting machine. The unwinding mechanism comprises a large plate, an unwinding frame arranged on the large plate, an air expansion shaft slidably connected to the unwinding frame along an axial direction, and an unwinding component driving the air expansion shaft to roll out the pole piece. The unwinding frame is provided with a first deviation correction device, a second deviation correction device and a third deviation correction device. The pole piece is conveyed to the die-cutting mechanism after being corrected by the first deviation correction device, the second deviation correction device and the third deviation correction device in sequence. Problem to be solved: Traditional die-cutting machines adopt a two-level deviation correction mechanism. Due to the processing errors and assembly errors of parts in the over-roller or the buffer roller, the position of the pole piece cannot be very accurate before entering the mold, resulting in large deviations in the appearance size of the finished pole piece, increasing the risk of battery explosion, etc.

Description

Technical Field

[0001] The invention relates to a pole piece die cutting machine, in particular to an unwinding mechanism. Background Art

[0002] At present, the electrode die-cutting machine usually includes an unwinding mechanism and a die-cutting mechanism. The unwinding mechanism sends the electrode to the die-cutting mechanism for die-cutting at a certain speed.

[0003] The unwinding mechanism includes a variety of necessary devices such as tension adjustment devices and buffer devices. After passing through these devices and then entering the die-cutting mechanism, the pole piece will be radially offset along the direction of the unwinding roller. Therefore, it is necessary to add a correction device to the unwinding mechanism to correct the pole piece.

[0004] Traditional die-cutting machines use a two-level correction mechanism, that is, the electrode is corrected for the first time after the air expansion shaft is unwound, and the second correction is performed by moving correction at the middle position. After the second correction, the electrode does not directly enter the mold for die-cutting, but passes through a series of rollers or buffer rollers before entering the die-cutting machine. Due to the processing errors and assembly errors of the parts of the rollers or buffer rollers, the position of the electrode cannot be very accurate before entering the mold, resulting in large deviations in the appearance and size of the finished electrode, increasing the risk of battery explosion, etc., so it needs to be improved. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an unwinding mechanism to solve the above-mentioned technical problems.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A reeling mechanism comprises a large plate, a reeling frame arranged on the large plate, an air expansion shaft connected to the reeling frame in a sliding manner along an axial direction, and an unwinding assembly driving the air expansion shaft to reel out a pole piece, wherein the reeling frame is provided with a first deflection correction device, a second deflection correction device and a third deflection correction device, and the pole piece is conveyed to a die-cutting mechanism after being corrected by the first deflection correction device, the second deflection correction device and the third deflection correction device in sequence;

[0008] The first deviation-correcting device comprises a first deviation-correcting roller group, a first sensor and a first driving assembly, the unwinding assembly is arranged on the first deviation-correcting device, and the first driving assembly is used to drive the first deviation-correcting roller group to synchronously slide axially with the air expansion shaft;

[0009] The second deviation-correcting device comprises a second deviation-correcting roller group, a second sensor and a second driving assembly, wherein the second driving assembly is used to drive the second deviation-correcting roller group to rotate;

[0010] The third deviation correction device includes a traction device, a third sensor and a third drive assembly. The traction device is used to clamp the pole piece and send the pole piece to the die-cutting mechanism. The third drive assembly is used to drive the unwinding frame and the traction device to slide synchronously and integrally on the large plate.

[0011] By adopting the above technical scheme, the first correction device, the second correction device and the third correction device are used to correct the pole piece at the front position, the middle position and the rear position respectively. Compared with the traditional unwinding mechanism of the secondary correction, the present invention completes the final correction of the pole piece through the third correction device, so that the pole piece can enter the die-cutting mechanism accurately, avoiding large deviations in the appearance size of the finished pole piece and increasing the risk of battery explosion.

[0012] Preferably, the first deviation correction device further comprises an unwinding shaft mounting seat mounted on the unwinding frame, an unwinding guide rail arranged on the unwinding shaft mounting seat and extending in a direction perpendicular to the unwinding frame, and a sliding plate slidingly matched with the unwinding guide rail;

[0013] The unwinding assembly is mounted on the sliding plate, and the first driving assembly is mounted on the unwinding shaft mounting seat;

[0014] The first driving assembly includes a first motor, a first screw rod connected to the output shaft of the first motor, and a connecting plate threadedly connected to the first screw rod, the connecting plate is fixedly connected to the sliding plate, the end of the first screw rod away from the first motor is rotatably connected to a movable end seat, and the movable end seat is installed on the unwinding shaft mounting seat.

[0015] Preferably, the unwinding assembly comprises an unwinding motor, a reduction gear set, and an unwinding mounting plate mounted on a sliding plate;

[0016] The unwinding frame is provided with a hollow moving shaft, the moving shaft is slidingly connected to the unwinding frame through a sliding bearing, and the air expansion shaft is rotatably connected to the inside of the moving shaft;

[0017] The unwinding mounting plate is installed with unwinding synchronous wheel 1 and unwinding synchronous wheel 2 which rotate synchronously through the unwinding belt, the unwinding motor is connected to the reduction gear set, the reduction gear set is connected to the unwinding synchronous wheel 1 and drives the unwinding synchronous wheel 1 to rotate, and the end of the moving shaft away from the air expansion shaft is connected to the unwinding synchronous wheel 2.

[0018] Preferably, the first deviation-correcting roller group includes a deviation-correcting follower roller 1, a deviation-correcting follower roller 2 and a deviation-correcting follower roller 3, and the pole piece rolled out of the air expansion shaft passes through the deviation-correcting follower roller 1, the deviation-correcting follower roller 2 and the deviation-correcting follower roller 3 in sequence;

[0019] The first deviation-correcting roller group is respectively located at three vertices of an obtuse triangle with a horizontal base, and the deviation-correcting follower roller 1 and the deviation-correcting follower roller 2 are located at two end points of the base of the obtuse triangle.

[0020] Preferably, the second deviation correction device comprises a traveling deviation correction seat arranged on the unwinding frame, and a roller mounting frame rotatably connected to the traveling deviation correction seat through a rotating shaft, and the second deviation correction roller group comprises two traveling deviation correction rollers, and both are mounted on the roller mounting frame;

[0021] Two cam followers are arranged between the traveling deviation correction seat and the roller mounting frame, the roller mounting frame is provided with a convex column, and the traveling deviation correction seat is provided with an arc groove for sliding with the convex column;

[0022] The second driving component is a second motor for driving the rotating shaft to rotate or a second electric cylinder for pushing the boss.

[0023] Preferably, the die-cutting mechanism includes a die-cutting bottom plate, and the third deviation-correcting device also includes a frame guide rail provided on the large plate for the unwinding frame to slide, and a traction guide rail provided on the die-cutting bottom plate for the traction device to slide;

[0024] The third driving assembly includes a third motor, a third screw rod connected to the third motor through a coupling, and a connecting piece threadedly connected to the third screw rod and fixedly connected to the unwinding frame. The end of the third screw rod away from the third motor is rotatably connected to a movable end seat.

[0025] Preferably, the traction device includes a traction mounting frame, a traction roller rotatably connected to the traction mounting frame, a rubber roller arranged above the traction roller, and a traction motor driving the traction roller. The traction device is fixedly connected to the unwinding frame through an L-shaped connecting block. The rubber roller and the traction roller jointly clamp the pole piece and deliver the pole piece to the die-cutting mechanism.

[0026] Preferably, the traction mounting frame is provided with a traction synchronous wheel 1 and a traction synchronous wheel 2, the output shaft of the traction motor is connected to the traction synchronous wheel 1 through a reduction gear unit, the end of the traction roller is connected to the traction synchronous wheel 2, and the traction synchronous wheel 1 and the traction synchronous wheel 2 rotate synchronously through a traction belt;

[0027] The traction mounting frame is provided with a traction cylinder, a vertical plate and a longitudinal guide rail. The vertical plate is slidably connected to the longitudinal guide rail. Both ends of the rubber roller are rotatably connected to the vertical plate. The traction cylinder drives the vertical plate to move along the longitudinal guide rail, bringing the rubber roller closer to or away from the traction roller.

[0028] The traction mounting frame is provided with a transition plate, which is located on the side of the traction roller close to the die-cutting mechanism, and the upper surface of the transition plate is tangent to the highest position of the traction roller or is 1-3 cm lower than the highest position of the traction roller.

[0029] Preferably, the unwinding frame is further provided with a tape connection platform, a tension adjustment device, a dust removal device, a buffer device, a first CCD detection device, and a second CCD detection device;

[0030] After being rolled out by the air expansion shaft, the electrode piece passes through the first deviation correction device, the belt connection platform, the tension adjustment device, the dust removal device, the second deviation correction device, the buffer device and the third deviation correction device in sequence, and is sent to the die-cutting mechanism by the third deviation correction device;

[0031] The first CCD detection device and the second CCD detection device are respectively used to detect the double-sided conditions of the pole piece before entering the third deviation correction device.

[0032] Preferably, the tension adjustment device comprises an adjustment rail arranged on the unwinding frame, an adjustment roller slidably connected to the adjustment rail, an adjustment cylinder driving the adjustment roller to slide along the adjustment rail, and an electrical proportional valve detecting the air pressure change of the adjustment cylinder;

[0033] The buffer device comprises a buffer guide rail arranged on the unwinding frame, an adjusting roller slidably connected to the buffer guide rail, and a buffer motor driving the adjusting roller to slide along the buffer guide rail.

[0034] The beneficial effects of the present invention are:

[0035] 1. At the front position, middle position and rear position of the pole piece transmission, the first deviation correction device, the second deviation correction device and the third deviation correction device are used to correct the deviation respectively, so as to improve the accuracy of the pole piece entering the die-cutting mechanism, thereby ensuring the quality of the pole piece after die-cutting;

[0036] 2. The first deviation correction device uses the first driving component to control the synchronous sliding of the air expansion shaft and the first deviation correction roller group to adjust the position of the pole piece when it is output to achieve the deviation correction effect. Compared with the existing technology, it will not pull the pole piece, reduce the influence of the deviation correction device on the pole piece, and improve the production quality of the pole piece;

[0037] 3. The third correcting device adopts the third driving component to control the unwinding frame and the traction device to move as a whole. Compared with the traditional correcting device, on the one hand, it will not cause pulling of the pole piece, avoiding the influence of the correcting device on the quality of the pole piece. On the other hand, after the third correcting device of the present invention corrects the pole piece, the pole piece is immediately sent to the die-cutting mechanism for die-cutting, avoiding secondary deviation of the pole piece after passing through other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0039] Figure 1 It is a three-dimensional schematic diagram of the present invention hiding the large plate, the traction device and the die-cutting mechanism;

[0040] Figure 2 It is a main plan view of the present invention;

[0041] Figure 3 It is a schematic diagram of the three-dimensional structure of the first deviation-correcting device in the present invention;

[0042] Figure 4 is a structural schematic diagram of a first sensor;

[0043] Figure 5 It is a structural schematic diagram of the tension adjustment device in the present invention;

[0044] Figure 6 It is a schematic diagram of the explosion of the second deviation correction device in the present invention;

[0045] Figure 7 is a schematic diagram of the structure of the cache device in the present invention;

[0046] Figure 8 A schematic diagram of the structure after partially hiding the unwinding frame and all the devices on the unwinding frame;

[0047] Fig. 9 is a schematic structural diagram of the third driving assembly in the present invention;

[0048] Fig.10 It is a schematic diagram of the structure of the traction device in the present invention.

[0049] The descriptions of the reference numerals in the figures are as follows:

[0050] 1. Large board;

[0051] 2. Unwinding frame; 201. First CCD detection device; 202. Second CCD detection device; 203. Air expansion shaft; 204. Unwinding motor; 205. Reduction gear set; 206. Unwinding mounting plate; 207. Unwinding belt; 208. Unwinding synchronous wheel 1; 209. Unwinding synchronous wheel 2;

[0052] 3. First deviation correction device; 301. First sensor; 302. First deviation correction roller group; 303. Unwinding shaft mounting seat; 304. Unwinding guide rail; 305. Sliding plate; 306. Connecting plate 1; 307. Connecting plate 2; 308. Roller; 309. First motor; 310. First screw rod; 311. Connecting plate; 312. Floating end seat; 313. Moving shaft; 314. Deflection correction follower roller 1; 315. Deflection correction follower roller 2; 316. Deflection correction follower roller 3; 317. Detection opening; 318. Induction position;

[0053] 4. Belt connection platform;

[0054] 5. Tension adjustment device; 501. Adjustment guide rail; 502. Adjustment roller; 503. Adjustment cylinder; 504. Electrical proportional valve;

[0055] 6. Dust removal device;

[0056] 7. Second deviation correction device; 701. Travel deviation correction seat; 702. Rotating shaft; 703. Roller mounting frame; 704. Second deviation correction roller group; 705. Second sensor; 706. Travel deviation correction roller; 707. Cam follower; 708. Boss; 709. Arc groove;

[0057] 8. Cache device; 801. Cache guide rail; 802. Cache roller; 803. Cache screw rod; 804. Cache motor;

[0058] 9. Third deviation-correcting device; 901. Frame guide rail; 902. Connecting block; 903. Traction device; 904. Third sensor; 905. Traction guide rail; 906. Third motor; 907. Coupling; 908. Third screw rod; 909. Connecting piece; 910. Moving end seat; 911. Traction mounting frame; 912. Traction roller; 913. Rubber roller; 914. Traction synchronous wheel 1; 915. Traction synchronous wheel 2; 916. Traction belt; 917. Traction cylinder; 918. Vertical plate; 919. Longitudinal guide rail; 920. Transition plate; 921. Sliding block; 922. Support block;

[0059] 10. Pole piece;

[0060] 11. Die-cutting mechanism; 1101. Die-cutting base plate. DETAILED DESCRIPTION

[0061] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0062] A reeling mechanism, such as Figure 1 and Figure 2 As shown, it includes a large plate 1 and an unwinding frame 2. The large plate 1 is horizontally arranged and fixed in position. The unwinding frame 2 is supported on the large plate 1 and is used to install a series of necessary devices for detecting or adjusting the pole pieces 10. The unwinding frame 2 is provided with an air-expanding shaft 203 and an unwinding assembly. The air-expanding shaft 203 can slide on the unwinding frame 2 along the axial direction. The unwinding assembly is used to drive the air-expanding shaft 203 to roll out the pole piece 10.

[0063] The unwinding frame 2 is provided with a first deviation correcting device 3, a tape connection platform 4, a tension adjusting device 5, a dust removing device 6, a second deviation correcting device 7, a buffer device 8, a first CCD detection device 201, a second CCD detection device 202 and a third deviation correcting device 9.

[0064] After being rolled out by the air expansion shaft 203, the pole piece 10 passes through the first deviation correction device 3, the belt connection platform 4, the tension adjustment device 5, the dust removal device 6, the second deviation correction device 7, the buffer device 8 and the third deviation correction device 9 in sequence, and is sent to the die-cutting mechanism 11 with the die-cutting base plate 1101 by the third deviation correction device 9.

[0065] The first CCD detection device 201 and the second CCD detection device 202 are respectively used to detect the double-sided conditions of the pole piece 10 before entering the third deviation correction device 9 .

[0066] The above-mentioned devices will be described in detail in order below.

[0067] 1. The first deviation correction device 3 and unwinding assembly

[0068] like Figures 1 to 3 As shown, the first deviation correction device 3 includes a first sensor 301 installed on the unwinding frame 2, a first deviation correction roller group 302, an unwinding shaft mounting seat 303 installed on the unwinding frame 2, an unwinding guide rail 304 arranged on the unwinding shaft mounting seat 303 and extending in a direction perpendicular to the unwinding frame 2, a sliding plate 305 slidingly cooperated with the unwinding guide rail 304, and a first driving component for driving the sliding plate 305 to slide on the unwinding guide rail 304.

[0069] The sliding plate 305 is fixedly connected to the connecting plate 1 306, and the connecting plate 1 306 is fixedly connected to the connecting plate 2 307. The unwinding frame 2 is provided with a roller shaft 308, and the roller shaft 308 is slidingly connected to the unwinding frame 2 through a sliding bearing. One end of the roller shaft 308 is connected to the first deviation correction roller group 302, and the other end is fixed on the connecting plate 2 307.

[0070] The connecting plate 1 306 and the connecting plate 2 307 are used to connect the first deviation-correcting roller group 302 and the sliding plate 305, and are used to adapt to the distance between the deviation-correcting roller group and the air inflation shaft 203; the first deviation-correcting roller group 302 uses the roller shaft 308 to generate a sliding connection with the unwinding frame 2.

[0071] The first driving assembly includes a first motor 309, a first screw rod 310 connected to the output shaft of the first motor 309, and a connecting plate 311 threadedly connected to the first screw rod 310, the connecting plate 311 is fixedly connected to the sliding plate 305, and the end of the first screw rod 310 away from the first motor 309 is rotatably connected to a movable end seat 312, and the movable end seat 312 is installed on the unwinding shaft mounting seat 303.

[0072] After the first sensor 301 gives an electrical signal to the first drive motor according to the position of the pole piece 10, the first drive motor drives the connecting plate 311 and the sliding plate 305 to move along the direction of the first screw rod 310, allowing the sliding plate 305 to slide in the direction of the unwinding guide rail 304, so that all components on the sliding plate 305 including the air expansion shaft 203 and the first deviation correction roller group 302 move forward and backward together along the direction perpendicular to the unwinding frame 2.

[0073] The unwinding assembly includes an unwinding motor 204, a reduction gear set 205, and an unwinding mounting plate 206 mounted on a sliding plate 305; the unwinding frame 2 is provided with a hollow movable shaft 313, which is slidingly connected to the unwinding frame 2 through a sliding bearing, and the air inflation shaft 203 is rotatably connected to the inside of the movable shaft 313.

[0074] Under the premise of not affecting the unwinding assembly and the air-expanding shaft 203 from unloading, the unwinding assembly and the air-expanding shaft 203 can be moved integrally by using the hollow moving shaft 313, so that the air-expanding shaft 203 can slide relative to the unwinding frame 2 while rotating.

[0075] The unwinding mounting plate 206 is installed with an unwinding synchronous wheel 1 208 and an unwinding synchronous wheel 209 which rotate synchronously through the unwinding belt 207. The unwinding motor 204 is connected to the reduction gear set 205. The reduction gear set 205 is connected to the unwinding synchronous wheel 1 208 and drives the unwinding synchronous wheel 1 208 to rotate. The end of the air inflation shaft 203 away from the pole piece 10 is connected to the unwinding synchronous wheel 209.

[0076] Through the unwinding synchronous wheel 1 208 and the unwinding synchronous wheel 209, on the one hand, the power direction of the unwinding motor 204 can be changed so that it can drive the air expansion shaft 203. On the other hand, the installation position of the unwinding motor 204 and the reduction gear set 205 is moved to above the sliding shaft, which greatly reduces the space required for installation and reduces the floor space.

[0077] The first deflection correction roller group 302 includes a deflection correction follower roller 1 314, a deflection correction follower roller 2 315 and a deflection correction follower roller 3 316. The pole piece 10 rolled out by the air expansion shaft 203 passes through the deflection correction follower roller 1 314, the deflection correction follower roller 2 315 and the deflection correction follower roller 3 316 in sequence. The first deflection correction roller group 302 is respectively located at the three vertices of an obtuse triangle with a horizontal base, and the deflection correction follower roller 1 314 and the deflection correction follower roller 2 315 are located at the two end points of the base of the obtuse triangle.

[0078] In order to save the space required for the unwinding mechanism as a whole and compress the space between components, in the unwinding mechanism, the pole piece 10 is usually unwound along the three sides of the plane where the unwinding frame 2 is located, so that the unwinding length of the pole piece 10 can be increased in a limited space, and then the tension adjustment device 5 and the buffer device 8 can be installed. In this way, the pole piece 10 must undergo two or more turns, and the turning point is the place where the pole piece 10 is most vulnerable to damage. Therefore, the first deviation correction device 3 uses three deviation correction follower rollers to merge the first turning of the pole piece 10 with the first deviation correction point, thereby maximizing the transmission length of the pole piece 10 from the deviation correction to the next turning, and reducing the influence of the deviation correction on the pole piece 10.

[0079] like Figure 4 As shown, the first sensor 301 has a U-shaped detection opening 317, and a long sensing position 318 is provided in the detection opening 317. When one side of the pole piece 10 completely blocks the sensing position 318 or completely detaches from the sensing position 318, the sensor transmits a forward electrical signal and a reverse electrical signal to the PLC respectively, and the PLC then controls the first drive component to perform corresponding operations.

[0080] The first sensor 301 is installed between the second correcting follower roller 315 and the third correcting follower roller 316. When the pole piece 10 deviates toward the unwinding frame 2, one side of the pole piece 10 will completely enter the detection opening 317 of the first sensor 301 and completely block the sensing position 318. At this time, the first sensor 301 gives a positive electrical signal to the first drive component, allowing the first drive component to move with the air expansion shaft 203 and the first correcting roller group 302 away from the unwinding frame 2. When the pole piece 10 is away from the unwinding frame 2, one side of the pole piece 10 will completely break away from the sensing position 318. At this time, the first sensor 301 gives a reverse electrical signal to the first drive component, allowing the first drive component to move with the air expansion shaft 203 and the first correcting roller group 302 toward the unwinding frame 2, thereby completing the correction of the pole piece 10.

[0081] The first deviation correction device 3 uses the first driving component to simultaneously control the air expansion shaft 203 and the first deviation correction roller group 302 to move together, adjust the position of the pole piece 10 during output, and thus achieve the deviation correction effect. Compared with the prior art, it will not pull the pole piece 10, reduce the influence of the deviation correction device on the pole piece 10, and improve the production quality of the pole piece 10.

[0082] 2. Tension adjustment device 5

[0083] like Figure 2 and Figure 5 As shown, the tension adjustment device 5 includes an adjustment rail 501 arranged on the unwinding frame 2, an adjustment roller 502 slidably connected to the adjustment rail 501, an adjustment cylinder 503 driving the adjustment roller 502 to slide along the adjustment rail 501, and an electrical proportional valve 504 for detecting the air pressure change of the adjustment cylinder 503.

[0084] Specific working principle: When the pole piece 10 passes through the adjusting roller 502, tension is applied to the adjusting roller 502, causing the piston of the adjusting cylinder 503 to move in the opposite direction. The electrical proportional valve 504 is used to record a standard air pressure value in the adjusting cylinder 503. When the tensioning degree of the pole piece 10 changes, the air pressure in the adjusting cylinder 503 will change. The electrical proportional valve 504 detects the change and adjusts the output air pressure of the adjusting cylinder 503 accordingly to maintain the tension of the adjusting pole piece 10 at a fixed value.

[0085] 3. Second deviation correction device 7

[0086] like Figure 2 and Figure 6 As shown, the second deviation correction device 7 includes a traveling deviation correction seat 701 arranged on the unwinding frame 2, a roller mounting frame 703 rotatably connected to the traveling deviation correction seat 701 through a rotating shaft 702, a second deviation correction roller group 704 rotatably connected to the roller mounting frame 703, a second driving component that drives the roller mounting frame 703 to rotate around the rotating shaft 702, and a second sensor 705 arranged on the unwinding frame 2.

[0087] The second deviation correction roller group 704 includes two traveling deviation correction rollers 706, and both are installed on the roller mounting frame 703; two cam followers 707 are arranged between the traveling deviation correction seat 701 and the roller mounting frame 703, the roller mounting frame 703 is provided with a convex column 708, and the traveling deviation correction seat 701 is provided with an arc groove 709 for sliding with the convex column 708;

[0088] The second driving assembly is a second motor for driving the rotating shaft 702 to rotate or a second electric cylinder for pushing the boss 708, which is not shown in the figure due to its relatively simple structure.

[0089] Specific working principle: The second deviation correction adopts the rotational offset of two traveling deviation correction rollers 706, and the offset is performed by tension change. The second sensor 705 is fixed on the large plate 1. The structure and detection principle of the second sensor 705 are the same as those of the first sensor 301. The second sensor 705 sends a signal to the PLC according to the offset of the pole piece 10. The PLC controls the second drive component to make the boss 708 slide in the arc groove 709, so that the tension on both sides of the pole piece 10 is different. The pole piece 10 will deviate to the side with lower tension, thereby achieving the deviation correction. The deviation correction principle of the second deviation correction device 7 can refer to the utility model patent with authorization announcement number CN202167565U.

[0090] 4. Cache Device 8

[0091] like Figure 2 and Figure 7As shown, the cache device 8 includes a cache guide rail 801 arranged on the unwinding frame 2, a cache roller 802 slidably connected to the cache guide rail 801, and a cache screw rod 803 and a cache motor 804 driving the cache roller 802 to slide along the cache guide rail 801.

[0092] Specific working principle: the air-inflating shaft 203 discharges the material continuously. When the traction mechanism pulls the material forward, the material is fed into the die-cutting mechanism 11, and the cache motor 804 drives the cache screw 803 to rotate, lifts the cache roller 802 upward, and releases the material cached in the cache roller 802, thereby compensating for the speed difference between the discharge speed of the air-inflating shaft 203 and the traction device 903; when the traction device 903 stops, that is, the die-cutting mechanism 11 starts die-cutting, the cache motor 804 rotates to drive the cache screw 803 to rotate, moves the cache roller 802 downward, and caches the material released by the air-inflating shaft 203 into the cache device 8, and so on. Under the intermittent cutting of the die-cutting mechanism 11, the tension of the pole piece 10 is kept constant to ensure the die-cutting accuracy.

[0093] 5. The third deviation correction device 9

[0094] like Figure 2 , Figure 8 , Fig. 9 and Fig.10 As shown, the die-cutting mechanism 11 includes a die-cutting base plate 1101, the third deviation correction device 9 includes a frame guide rail 901 arranged on the large plate 1 and for the unwinding frame 2 to slide on the large plate 1, a third driving assembly arranged on the large plate 1, a traction device 903 fixedly connected to the unwinding frame 2 through an L-shaped connecting block 902, a third sensor 904 arranged on the die-cutting base plate 1101, and a traction guide rail 905 arranged on the die-cutting base plate 1101 and for the traction device 903 to slide on the die-cutting base plate 1101.

[0095] The traction device 903 is used to clamp the pole piece 10 and send the pole piece 10 to the die-cutting mechanism 11, and the third driving assembly is used to drive the unwinding frame 2 and the traction device 903 to slide synchronously and integrally on the large plate 1.

[0096] The die-cutting mechanism 11 itself is not a part of the unwinding mechanism provided by the present invention, but the traction guide rail 905 and the third sensor 904 of the third deviation correction device 9 need to be installed on the die-cutting bottom plate 1101 of the die-cutting mechanism 11 .

[0097] The third driving assembly includes a third motor 906, a third screw rod 908 connected to the third motor 906 via a coupling 907, and a connecting piece 909 threadedly connected to the third screw rod 908 and fixedly connected to the unwinding frame 2. The end of the third screw rod 908 away from the third motor 906 is rotatably connected to a movable end seat 910.

[0098] Specific working principle: the positions of the large plate 1 and the die-cutting mechanism 11 remain stationary. When the edge position of the pole piece 10 completely enters the third sensor 904, the third sensor 904 sends a signal to the third drive component, or sends a signal to the third drive component through the PLC. The third drive component drives the third screw rod 908 to rotate, so that the unwinding frame 2 moves along the frame guide rail 901 in the direction away from the third sensor 904, and the unwinding frame 2 moves with the traction device 903, so that the traction device 903 moves in the direction away from the third sensor 904 at the same time. Similarly, when the third sensor 904 cannot sense the edge position of the pole piece 10, the unwinding frame 2 and the traction device 903 move as a whole in the direction close to the third sensor 904, so that no matter in which direction the pole piece 10 is offset, it can be adjusted to the standard position.

[0099] The traction device 903 includes a traction mounting frame 911, a traction roller 912 rotatably connected to the traction mounting frame 911, a rubber roller 913 disposed above the traction roller 912, and a traction motor ( Fig. 9 The rubber roller 913 and the traction roller 912 jointly clamp the pole piece 10 and send the pole piece 10 to the die-cutting mechanism 11.

[0100] The function of the traction device 903 is to use the rubber roller 913 and the traction roller 912 to clamp the pole piece 10 together. When the unwinding frame 2 moves, the traction device 903 can move with the pole piece 10. If there is no clamping force of the traction device 903, then during the movement of the unwinding frame 2, the pole piece 10 of the unwinding frame 2 is likely to be detached from the guide roller on the unwinding frame 2.

[0101] The traction mounting frame 911 is provided with a traction synchronous wheel 1 914 and a traction synchronous wheel 2 915. The output shaft of the traction motor is connected to the traction synchronous wheel 1 914 through a reduction gear unit. The end of the traction roller 912 is connected to the traction synchronous wheel 2 915. The traction synchronous wheel 1 914 and the traction synchronous wheel 2 915 rotate synchronously through the traction belt 916.

[0102] The use of traction synchronous wheel 1 914 and traction synchronous wheel 2 915 can change the output direction of the traction motor, so that the installation position of the traction motor is located in the traction mounting frame 911, thereby reducing the installation space required for the components. In addition, when the traction motor is a servo motor, the speed and direction can be controlled by PLC to adjust the speed of the traction roller 912, that is, adjust the speed of the pole piece 10 entering the die-cutting mechanism 11.

[0103] The traction mounting frame 911 is provided with a traction cylinder 917, a vertical plate 918 and a longitudinal guide rail 919. The vertical plate 918 is slidably connected to the longitudinal guide rail 919. Both ends of the rubber roller 913 are rotatably connected to the vertical plate 918. The traction cylinder 917 drives the vertical plate 918 to move along the direction of the longitudinal guide rail 919, bringing the rubber roller 913 closer to or away from the traction roller 912.

[0104] The traction cylinder 917 can drive the vertical plate 918 and the rubber roller 913 to move in the direction of the longitudinal guide rail 919, thereby changing the distance between the rubber roller 913 and the traction roller 912. By adjusting the stroke of the traction cylinder 917, the rubber roller 913 is just pressed against the traction roller 912. When the pole piece 10 passes between the rubber roller 913 and the traction roller 912, a clamping force is given to the pole piece 10.

[0105] The traction mounting frame 911 is provided with a transition plate 920, which is located on the side of the traction roller 912 close to the die-cutting mechanism 11, and the upper surface of the transition plate 920 is tangent to the highest position of the traction roller 912 or is 1-3 cm lower than the highest position of the traction roller 912.

[0106] The pole piece 10 will lose its clamping force after passing through the traction device 903. The transition plate 920 ensures that the pole piece 10 can be transported to the inside of the die-cutting mechanism 11 in a straight line, that is, it accurately enters the die-cutting position; the upper surface of the transition plate 920 is tangent to the highest position of the traction roller 912 in order to seamlessly connect the pole piece 10, and it is 1-3 cm lower than the highest position of the traction roller 912 in order to avoid errors during installation that cause the transition plate 920 to be slightly higher than the traction roller 912, causing the pole piece 10 to bend.

[0107] The structure and principle of the third sensor 904 are the same as those of the first sensor 301 and are not described in detail here.

[0108] There are four frame guide rails 901, and two of them are located on both sides of the third driving assembly. Each frame guide rail 901 is slidably connected to two sliders 921, and the sliders 921 are fixedly connected to the unwinding frame 2. A plurality of L-shaped support blocks 922 are also provided at the bottom of the unwinding frame 2. The lower ends of the support blocks 922 are against the upper surface of the large plate 1, and the support blocks 922 are fixed to the large plate 1 with bolts during transportation.

[0109] Four frame guide rails 901 are used to share the weight of the unwinding frame 2, and a total of eight sliders are used to strengthen the connection between the unwinding frame 2 and the frame guide rails 901; during transportation, the two sides of the support block are respectively fixed to the large board 1 and the unwinding frame 2 to share the gravity borne by the frame guide rails 901.

[0110] The main technical effects of the third deflection-correcting device 9 are as follows: the third sensor 904 gives a signal, and the third driving assembly controls the unwinding frame 2 and the traction device 903 to move integrally. Compared with the traditional deflection-correcting device, on the one hand, it will not cause the pulling of the pole piece 10, and avoid the influence of the deflection-correcting device on the quality of the pole piece 10. On the other hand, after the deflection is corrected by the third deflection-correcting device 9, the pole piece 10 is immediately sent to the die-cutting mechanism 11 for die-cutting, and the pole piece 10 is prevented from secondary deviation after passing through other devices.

[0111] In addition, the conventional deflection correction device has a delay, that is, when it is found that the pole piece 10 entering the die-cutting mechanism 11 is deflected, the conventional deflection correction device performs deflection correction, but there is a section of the pole piece 10 between the deflection correction device and the die-cutting mechanism 11 that cannot be corrected in time.

[0112] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A reeling mechanism, characterized in that: The invention comprises a large plate (1), an unwinding frame (2) arranged on the large plate (1), an air expansion shaft (203) slidably connected to the unwinding frame (2) along the axial direction, and an unwinding assembly driving the air expansion shaft (203) to unwind a pole piece (10), wherein the unwinding frame (2) is provided with a first deflection correction device (3), a second deflection correction device (7) and a third deflection correction device (9), and the pole piece (10) is conveyed to a die-cutting mechanism (11) after being deflected by the first deflection correction device (3), the second deflection correction device (7) and the third deflection correction device (9) in sequence; The first deflection-correcting device (3) comprises a first deflection-correcting roller group (302), a first sensor (301) and a first driving component, the unwinding component is arranged on the first deflection-correcting device (3), and the first driving component is used to drive the first deflection-correcting roller group (302) and the air expansion shaft (203) to synchronously slide axially; The second deflection-correcting device (7) comprises a second deflection-correcting roller group (704), a second sensor (705) and a second driving component, wherein the second driving component is used to drive the second deflection-correcting roller group (704) to rotate; The third deviation-correcting device (9) comprises a traction device (903), a third sensor (904) and a third driving assembly, wherein the traction device (903) is used to clamp the pole piece (10) and send the pole piece (10) to the die-cutting mechanism (11), and the third driving assembly is used to drive the unwinding frame (2) and the traction device (903) to slide synchronously and integrally on the large plate (1); The first deflection correction roller group (302) comprises a deflection correction follower roller one (314), a deflection correction follower roller two (315) and a deflection correction follower roller three (316); the pole piece (10) rolled out by the air expansion shaft (203) passes through the deflection correction follower roller one (314), the deflection correction follower roller two (315) and the deflection correction follower roller three (316) in sequence; The first deviation-correcting roller group (302) is respectively located at three vertices of an obtuse triangle with a horizontal base, and the deviation-correcting follower roller 1 (314) and the deviation-correcting follower roller 2 (315) are located at two end points of the base of the obtuse triangle; The second deflection correction device (7) comprises a traveling deflection correction seat (701) arranged on the unwinding frame (2), and a roller mounting frame (703) rotatably connected to the traveling deflection correction seat (701) via a rotating shaft (702), and the second deflection correction roller group (704) comprises two traveling deflection correction rollers (706), and both are mounted on the roller mounting frame (703); Two cam followers (707) are provided between the traveling deviation correction seat (701) and the roller mounting frame (703); the roller mounting frame (703) is provided with a convex column (708); and the traveling deviation correction seat (701) is provided with an arc groove (709) for sliding with the convex column (708); The second driving component is a second motor for driving the rotating shaft (702) to rotate or a second electric cylinder for pushing the boss (708); The die-cutting mechanism (11) comprises a die-cutting bottom plate (1101), and the third deviation-correcting device (9) further comprises a frame guide rail (901) arranged on the large plate (1) and for the unwinding frame (2) to slide, and a traction guide rail (905) arranged on the die-cutting bottom plate (1101) and for the traction device (903) to slide; The third driving assembly comprises a third motor (906), a third screw rod (908) connected to the third motor (906) via a coupling (907), and a connecting member (909) threadedly connected to the third screw rod (908) and fixedly connected to the unwinding frame (2), and one end of the third screw rod (908) away from the third motor (906) is rotatably connected to a movable end seat (910); The traction device (903) comprises a traction mounting frame (911), a traction roller (912) rotatably connected to the traction mounting frame (911), a rubber roller (913) arranged above the traction roller (912), and a traction motor driving the traction roller (912); the traction device (903) is fixedly connected to the unwinding frame (2) via an L-shaped connecting block (902); the rubber roller (913) and the traction roller (912) jointly clamp the pole piece (10) and deliver the pole piece (10) to the die-cutting mechanism (11); The traction mounting frame (911) is provided with a traction synchronous wheel 1 (914) and a traction synchronous wheel 2 (915); the output shaft of the traction motor is connected to the traction synchronous wheel 1 (914) via a reduction gear unit; the end of the traction roller (912) is connected to the traction synchronous wheel 2 (915); the traction synchronous wheel 1 (914) and the traction synchronous wheel 2 (915) rotate synchronously via a traction belt (916); The traction mounting frame (911) is provided with a traction cylinder (917), a vertical plate (918) and a longitudinal guide rail (919); the vertical plate (918) is slidably connected to the longitudinal guide rail (919); both ends of the rubber roller (913) are rotatably connected to the vertical plate (918); the traction cylinder (917) drives the vertical plate (918) to move along the longitudinal guide rail (919), and drives the rubber roller (913) to approach or move away from the traction roller (912); The traction mounting frame (911) is provided with a transition plate (920), and the transition plate (920) is located on a side of the traction roller (912) close to the die-cutting mechanism (11), and the upper surface of the transition plate (920) is tangent to the highest position of the traction roller (912) or is 1-3 cm lower than the highest position of the traction roller (912).

2. The unwinding mechanism according to claim 1, characterized in that: The first deviation-correcting device (3) further comprises an unwinding shaft mounting seat (303) mounted on the unwinding frame (2), an unwinding guide rail (304) arranged on the unwinding shaft mounting seat (303) and extending in a direction perpendicular to the unwinding frame (2), and a sliding plate (305) slidingly matched with the unwinding guide rail (304); The unwinding assembly is mounted on a sliding plate (305), and the first driving assembly is mounted on an unwinding shaft mounting seat (303); The first driving assembly comprises a first motor (309), a first screw rod (310) connected to the output shaft of the first motor (309), and a connecting plate (311) threadedly connected to the first screw rod (310), wherein the connecting plate (311) is fixedly connected to the sliding plate (305), and the end of the first screw rod (310) away from the first motor (309) is rotatably connected to a movable end seat (312), and the movable end seat (312) is mounted on the unwinding shaft mounting seat (303).

3. The unwinding mechanism according to claim 2, characterized in that: The unwinding assembly comprises an unwinding motor (204), a reduction gear set (205), and an unwinding mounting plate (206) mounted on a sliding plate (305); The unwinding frame (2) is provided with a hollow movable shaft (313), the movable shaft (313) is slidingly connected to the unwinding frame (2) via a sliding bearing, and the air expansion shaft (203) is rotatably connected to the inside of the movable shaft (313); The unwinding mounting plate (206) is provided with an unwinding synchronous wheel 1 (208) and an unwinding synchronous wheel 2 (209) which rotate synchronously via an unwinding belt (207); the unwinding motor (204) is connected to a reduction gear set (205); the reduction gear set (205) is connected to the unwinding synchronous wheel 1 (208) and drives the unwinding synchronous wheel 1 (208) to rotate; and the end of the movable shaft (313) away from the air expansion shaft (203) is connected to the unwinding synchronous wheel 2 (209).

4. The unwinding mechanism according to claim 1, characterized in that: The unwinding frame (2) is also provided with a tape connection platform (4), a tension adjustment device (5), a dust removal device (6), a buffer device (8), a first CCD detection device (201), and a second CCD detection device (202); After being rolled out by the air expansion shaft (203), the pole piece (10) passes through the first deviation correction device (3), the belt connection platform (4), the tension adjustment device (5), the dust removal device (6), the second deviation correction device (7), the buffer device (8) and the third deviation correction device (9) in sequence, and is then sent to the die-cutting mechanism (11) by the third deviation correction device (9); The first CCD detection device (201) and the second CCD detection device (202) are respectively used to detect the double-sided conditions of the pole piece (10) before entering the third deviation correction device (9).

5. The unwinding mechanism according to claim 4, characterized in that: The tension adjustment device (5) comprises an adjustment rail (501) arranged on the unwinding frame (2), an adjustment roller (502) slidably connected to the adjustment rail (501), an adjustment cylinder (503) driving the adjustment roller (502) to slide along the adjustment rail (501), and an electrical proportional valve (504) for detecting changes in air pressure of the adjustment cylinder (503); The cache device (8) comprises a cache guide rail (801) arranged on the unwinding frame (2), a cache roller (802) slidably connected to the cache guide rail (801), and a cache lead screw (803) and a cache motor (804) for driving the cache roller (802) to slide along the cache guide rail (801).

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