A third deviation correction device for unwinding mechanism

Abstract

The invention discloses a third deviation correction device of an unwinding mechanism, which belongs to an unwinding mechanism of a die-cutting machine, comprising a large plate, an unwinding frame slidably connected to the large plate through a frame guide rail, a driving component arranged on the large plate and used for driving the unwinding frame to move along the frame guide rail direction, a traction device connected to the unwinding frame, and a sensor; the traction device is used for clamping a pole piece and sending the pole piece to a die-cutting mechanism with a die-cutting base plate, the die-cutting base plate is provided with a traction guide rail parallel to the frame guide rail, and the traction device is slidably connected to the traction guide rail; the sensor is installed on the die-cutting base plate and is located on one side of the pole piece; the problem that the position of the pole piece cannot be very accurate before entering the mold due to part processing errors and assembly errors of a passing roller or a buffer roller is solved, 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 an unwinding mechanism of a die-cutting machine, in particular to a third deviation-correcting device of the 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 at a certain speed for die-cutting.

[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 a third deviation-correcting device for 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 third deviation correction device of an unwinding mechanism comprises a large plate, an unwinding frame slidably connected to the large plate through a frame guide rail, a driving assembly arranged on the large plate and used to drive the unwinding frame to move along the frame guide rail, a traction device connected to the unwinding frame, and a sensor;

[0008] The traction device is used to clamp the pole piece and send the pole piece to a die-cutting mechanism with a die-cutting base plate. The die-cutting base plate is provided with a traction guide rail parallel to the frame guide rail. The traction device is slidably connected to the traction guide rail.

[0009] By adopting the above technical solution, the positions of the large plate and the die-cutting mechanism are kept stationary. When the edge position of the pole piece completely enters the sensor, the sensor sends a signal to the drive component, or sends a signal to the drive component through the PLC, and the drive component drives the screw rod to rotate, so that the unwinding frame moves in the direction away from the sensor along the frame guide rail, and the unwinding frame moves with the traction device, so that the traction device moves in the direction away from the sensor at the same time. Similarly, when the sensor cannot sense the edge position of the pole piece, the unwinding frame and the traction device move in a whole in the direction close to the sensor, so that no matter in which direction the pole piece is offset, it can be adjusted to the standard position;

[0010] In the present invention, the sensor is used to give a signal, and the driving component controls the unwinding frame and the traction device to move in an integrated manner. Compared with the traditional correcting device, on the one hand, it will not cause the 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 the secondary deviation of the pole piece after passing through other devices.

[0011] In addition, the traditional correction device has a delay, that is, when it is found that the pole piece entering the die-cutting mechanism is offset, the traditional correction device corrects the deviation, but there is a section of the pole piece between the correction device and the die-cutting mechanism that cannot be corrected in time.

[0012] Preferably, the driving assembly comprises a driving motor, a screw connected to the driving motor via a coupling, and a connecting piece threadedly connected to the screw and fixedly connected to the unwinding frame;

[0013] One end of the screw rod away from the driving motor is rotatably connected to a movable end seat.

[0014] By adopting the above technical solution, after the sensor gives an electrical signal to the drive motor according to the position of the pole piece, the drive motor drives the unwinding frame to move along the frame guide rail, so that the unwinding frame and the traction device move with the pole piece as a whole.

[0015] Preferably, the traction device comprises 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;

[0016] The traction device is fixedly connected to the unwinding frame via an L-shaped connection block;

[0017] The rubber roller and the traction roller clamp the pole piece together and send the pole piece to the die-cutting mechanism.

[0018] By adopting the above technical solution, the function of the traction device is to use the rubber roller and the traction roller to clamp the pole piece together. When the unwinding frame moves, the traction device can move with the pole piece. If there is no clamping force of the traction device, then during the movement of the unwinding frame, the pole piece of the unwinding frame is likely to be detached from the roller shaft on the unwinding frame.

[0019] Preferably, the traction mounting frame is provided with synchronous wheel one and synchronous wheel two, the output shaft of the traction motor is connected to synchronous wheel one through a reduction gear unit, the end of the traction roller is connected to synchronous wheel two, and the synchronous wheel one and synchronous wheel two rotate synchronously through a traction belt.

[0020] By adopting the above technical solution, the output direction of the traction motor can be changed by using synchronous wheels one and two, so that the installation position of the traction motor is located inside the traction mounting frame, thereby reducing the installation space required for the components. In addition, when the output power of the traction motor remains unchanged, the external traction motor is a servo motor, and the speed and direction can be controlled by PLC to adjust the traction speed, that is, adjust the speed at which the pole piece enters the die-cutting mechanism.

[0021] Preferably, the traction mounting frame is provided with a traction cylinder, a mounting plate and a longitudinal guide rail, the mounting plate is slidingly connected to the longitudinal guide rail, both ends of the rubber roller are rotatably connected to the mounting plate, and the traction cylinder drives the mounting plate to move along the direction of the longitudinal guide rail, bringing the rubber roller closer to or away from the traction roller.

[0022] By adopting the above technical solution, the traction cylinder can drive the mounting plate and the rubber roller to move in the direction of the longitudinal guide rail, thereby changing the distance between the rubber roller and the traction roller. By adjusting the stroke of the traction cylinder, the rubber roller is just pressed against the traction roller. When the pole piece passes between the rubber roller and the traction roller, a clamping force is given to the pole piece.

[0023] Preferably, 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.

[0024] By adopting the above technical solution, the electrode piece will lose its clamping force after passing through the traction device, and the transition plate ensures that the electrode piece can be transported to the inside of the die-cutting mechanism in a straight line, that is, it accurately enters the die-cutting position; the upper surface of the transition plate is tangent to the highest position of the traction roller in order to seamlessly connect the electrode piece, and it is 1-3 cm lower than the highest position of the traction roller in order to avoid errors during installation that cause the transition plate to be slightly higher than the traction roller, causing the electrode piece to bend.

[0025] Preferably, the sensor has a U-shaped detection opening, in which a long strip-type sensing position is provided. When one side of the pole piece completely blocks the sensing position or completely detaches from the sensing position, the sensor transmits a forward electrical signal and a reverse electrical signal to the drive component respectively.

[0026] By adopting the above technical solution, the sensor in the present invention is installed on the side of the pole piece close to the unwinding frame. When the pole piece is biased toward the sensor, one side of the pole piece will completely enter the detection opening of the sensor and completely block the sensing position. At this time, the sensor gives a positive electrical signal to the drive component, allowing the drive component to move with the unwinding frame and the traction device, so that the pole piece is in a position that partially blocks the sensing position. This position is the standard position.

[0027] Preferably, the die-cutting base plate is provided with an adjustment track consisting of three sliding rods, the adjustment track is slidably connected with an adjustment block, and the sensor is mounted on the adjustment block.

[0028] By adopting the above technical solution and using the adjustment block and the adjustment track, the staff can adjust the position of the sensor accordingly according to the position of the die-cutting mechanism actually installed.

[0029] Preferably, the unwinding frame is provided with a CCD light source, the CCD light source is located in front of the traction device, and the CCD light source is used to remove defective pole pieces.

[0030] By adopting the above technical solution, the pole piece needs to pass through tension adjustment devices, buffer devices, etc. on the unwinding frame, and defective pole pieces are inevitable. The CCD light source can remove these defective pole pieces before the pole pieces enter the traction device.

[0031] Preferably, four frame guide rails are provided, and two of them are located on both sides of the driving assembly. Each of the frame guide rails is slidably connected to two sliders, and the sliders are fixedly connected to the unwinding frame. A plurality of L-shaped support blocks are also provided at the bottom of the unwinding frame, and the lower ends of the support blocks are against the upper surface of the large plate.

[0032] By adopting the above technical solution, four frame guides are used to share the weight of the unwinding frame, and a total of eight sliders are used to strengthen the connection between the unwinding frame and the frame guides; during transportation, the two sides of the support block are respectively fixed to the large plate and the unwinding frame to share the gravity borne by the frame guides.

[0033] The beneficial effects of the present invention are:

[0034] 1. The driving assembly controls the unwinding frame and the traction device to move in an integrated manner. Compared with the traditional deviation-correcting device, on the one hand, it will not cause the pulling of the pole piece, thus avoiding the influence of the deviation-correcting device on the quality of the pole piece. On the other hand, after the deviation is corrected by the third deviation-correcting device of the present invention, the pole piece is immediately sent to the die-cutting mechanism for die-cutting, thus avoiding the secondary deviation of the pole piece after passing through other devices.

[0035] 2. The traditional correction device has a delayed nature, that is, when the pole piece entering the die-cutting mechanism is found to be offset, the traditional correction device corrects the deviation, but there is a pole segment between the correction device and the die-cutting mechanism that cannot be corrected in time;

[0036] 3. The function of the traction device is to use the rubber roller and the traction roller to clamp the pole piece together. When the unwinding frame moves, the traction device can move with the pole piece. If there is no clamping force of the traction device, then during the movement of the unwinding frame, the pole piece of the unwinding frame is likely to be separated from the roller shaft on the unwinding frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0038] Figure 1 It is a front view of the present invention;

[0039] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0040] Figure 3 For Figure 2 On the basis, a schematic diagram of a three-dimensional structure behind a part of the unwinding frame and a part of the unwinding frame is hidden;

[0041] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0042] Figure 5 for Figure 3 A structural diagram from another perspective;

[0043] Figure 6 It is a schematic diagram of the structure of the driving component in the present invention;

[0044] Figure 7 It is a structural schematic diagram of the traction device in the present invention;

[0045] Figure 8 for Figure 7 Schematic diagram of the structure from another perspective.

[0046] The descriptions of the reference numerals in the figures are as follows:

[0047] 1. Large plate; 101. Frame rail; 102. Slider; 103. Support block;

[0048] 2. Unwinding frame; 201. CCD light source;

[0049] 3. Driving assembly; 301. Driving motor; 302. Coupling; 303. Screw rod; 304. Connecting piece; 305. Moving end seat;

[0050] 4. Traction device; 401. Traction mounting frame; 402. Traction roller; 403. Rubber roller; 404. Traction motor; 405. Connecting block; 406. Synchronous wheel 1; 407. Synchronous wheel 2; 408. Speed ​​reducer; 409. Traction belt; 410. Traction cylinder; 411. Mounting plate; 412. Longitudinal guide rail; 413. Transition plate;

[0051] 5. Pole piece;

[0052] 6. sensor; 601. detection opening; 602. sensing position;

[0053] 7. Die-cutting mechanism; 701. Die-cutting base plate; 702. Pulling guide rail; 703. Adjusting rail; 704. Adjusting block. DETAILED DESCRIPTION

[0054] 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.

[0055] A third deviation correction device of an unwinding mechanism, such as Figures 1 to 5 As shown, it includes a horizontal and fixed large plate 1, an unwinding frame 2 slidingly connected to the large plate 1 through a frame guide rail 101, a driving component 3 arranged on the large plate 1 and used to drive the unwinding frame 2 to move along the frame guide rail 101, a traction device 4 connected to the unwinding frame 2, and a sensor 6; the traction device 4 is used to clamp the pole piece 5 and send the pole piece 5 to a die-cutting mechanism 7 with a die-cutting base plate 701, the die-cutting base plate 701 is provided with a traction guide rail 702 parallel to the frame guide rail 101, and the traction device 4 is slidably connected to the traction guide rail 702; the sensor 6 is installed on the die-cutting base plate 701 and is located on one side of the pole piece 5.

[0056] The die-cutting mechanism 7 itself does not belong to the scope of the third deviation correction device, but the traction guide rail 702 and the sensor 6 of the third deviation correction device need to be installed on the die-cutting bottom plate 701 of the die-cutting mechanism 7.

[0057] Specific working principle: the positions of the large plate 1, the die-cutting mechanism 7 and the die-cutting bottom plate 701 remain stationary. When the edge position of the pole piece 5 completely enters the sensor 6, the sensor 6 sends a signal to the drive component 3, or sends a signal to the drive component 3 through the PLC. The drive component 3 drives the screw rod 303 to rotate, so that the unwinding frame 2 moves along the frame guide rail 101 in the direction away from the sensor 6, and the unwinding frame 2 moves with the traction device 4, so that the traction device 4 moves away from the sensor 6 at the same time. Similarly, when the sensor 6 cannot sense the edge position of the pole piece 5, the unwinding frame 2 and the traction device 4 move as a whole in the direction close to the sensor 6, so that no matter in which direction the pole piece 5 is offset, it can be adjusted to the standard position.

[0058] After passing through the tension adjustment device, buffer device, etc. on the unwinding frame 2, defective pole pieces 5 are inevitable. To solve this problem, the unwinding frame 2 is provided with a CCD light source 201, which is located in the front position of the traction device 4. The CCD light source 201 is used to remove defective pole pieces 5.

[0059] The pole piece 5 needs to pass through tension adjustment devices, buffer devices, etc. on the unwinding frame 2, and defective pole pieces 5 are inevitable. The CCD light source 201 can remove these defective pole pieces 5 before the pole pieces 5 enter the traction device 4.

[0060] In order to enhance the supporting strength of the unwinding frame 2 on the large board 1 and the sliding smoothness of the unwinding frame 2, the present invention is further configured as follows.

[0061] Under normal circumstances, the unwinding frame 2 will block the frame guide rail 101 below, so Figure 3 and 5 The unwinding frame 2 is partially hidden in the middle to reveal the frame guide rail 101 below. It can be inferred that the frame guide rail 101 is matched with the hidden part of the unwinding frame 2.

[0062] There are four frame guide rails 101, and two of them are located on both sides of the driving assembly 3. Each frame guide rail 101 is slidably connected to two sliders 102, and the sliders 102 are fixedly connected to the unwinding frame 2. A plurality of L-shaped support blocks 103 are also provided at the bottom of the unwinding frame 2, and the lower ends of the support blocks 103 are against the upper surface of the large plate 1.

[0063] Four frame guide rails 101 are used to share the weight of the unwinding frame 2, and a total of eight sliders 102 are used to strengthen the connection between the unwinding frame 2 and the frame guide rails 101; during transportation, the two sides of the support block 103 are respectively fixed to the large board 1 and the unwinding frame 2 to share the gravity borne by the frame guide rails 101.

[0064] like Figure 4and Figure 5 As shown, further, the sensor 6 has a U-shaped detection opening 601, and a long strip-type sensing position 602 is provided in the detection opening 601. When one side of the pole piece 5 completely blocks the sensing position 602 or completely detaches from the sensing position 602, the sensor 6 transmits a forward electrical signal and a reverse electrical signal to the driving component 3 respectively.

[0065] The sensor 6 in the present invention is installed on the side of the pole piece 5 close to the unwinding frame 2. When the pole piece 5 is biased toward the sensor 6, one side of the pole piece 5 will completely enter the detection opening 601 of the sensor 6 and completely block the sensing position 602. At this time, the sensor 6 gives a positive electrical signal to the drive component 3, allowing the drive component 3 to move with the unwinding frame 2 and the traction device 4, so that the pole piece 5 is in a position that partially blocks the sensing position 602. This position is the standard position.

[0066] In order to make the position of the sensor 6 move along with the position of the die-cutting mechanism 7, the die-cutting bottom plate 701 is provided with an adjustment track 703 consisting of three slide bars, and the adjustment track 703 is slidably connected with an adjustment block 704, and the sensor 6 is installed on the adjustment block 704. By using the adjustment block 704 and the adjustment track 703, the staff can adjust the position of the sensor 6 accordingly according to the position of the die-cutting mechanism 7 actually installed.

[0067] In order to provide a more specific structure of the driving assembly 3 so that the driving assembly 3 can drive the unwinding frame, the present invention is further configured as follows.

[0068] like Figure 6 As shown, the driving assembly 3 includes a driving motor 301, a screw rod 303 connected to the driving motor 301 through a coupling 302, and a connecting member 304 threadedly connected to the screw rod 303 and fixedly connected to the unwinding frame 2; the end of the screw rod 303 away from the driving motor 301 is rotatably connected to a movable end seat 305.

[0069] After the sensor 6 gives an electrical signal to the driving motor 301 according to the position of the pole piece 5 , the driving motor 301 drives the unwinding frame 2 to move along the frame guide rail 101 , so that the unwinding frame 2 and the traction device 4 move with the pole piece 5 as a whole.

[0070] In order to enable the traction device 4 to have the function of clamping the pole piece 5, the present invention is further configured as follows.

[0071] like Figure 7 and Figure 8As shown, the traction device 4 includes a traction mounting frame 401, a traction roller 402 rotatably connected to the traction mounting frame 401, a rubber roller 403 arranged above the traction roller 402, and a traction motor 404 driving the traction roller 402; the traction device 4 is fixedly connected to the unwinding frame 2 through an L-shaped connecting block 405; the rubber roller 403 and the traction roller 402 jointly clamp the pole piece 5 and send the pole piece 5 to the die-cutting mechanism 7.

[0072] The function of the traction device 4 is to use the rubber roller 403 and the traction roller 402 to clamp the pole piece 5 together. When the unwinding frame 2 moves, the traction device 4 can move with the pole piece 5. If there is no clamping force of the traction device 4, then during the movement of the unwinding frame 2, the pole piece 5 of the unwinding frame 2 is likely to be detached from the roller shaft on the unwinding frame 2.

[0073] In addition, in order to enable the pole piece 5 between the traction device 4 and the die-cutting mechanism 7 to be relatively gently corrected and adjusted, the connecting block 405 can be replaced with one with an elastic buffer.

[0074] In order to reduce the installation space required for the traction device 4 and to adjust the rotation speed of the traction roller 402, the present invention is further configured as follows.

[0075] The traction mounting frame 401 is provided with a synchronous wheel 1 406 and a synchronous wheel 2 407. The output shaft of the traction motor 404 is connected to the synchronous wheel 1 406 through a reduction gear unit 408. The end of the traction roller 402 is connected to the synchronous wheel 2 407. The synchronous wheel 1 406 and the synchronous wheel 2 407 rotate synchronously through a traction belt 409.

[0076] The use of synchronous wheel 1 406 and synchronous wheel 2 407 can change the output direction of the traction motor 404, so that the installation position of the traction motor 404 is located in the traction mounting frame 401, thereby reducing the installation space required for the components. In addition, when the output power of the traction motor 404 remains unchanged, the external traction motor 404 is a servo motor, and the speed and direction can be controlled by PLC to adjust the traction speed, that is, adjust the speed at which the pole piece enters the die-cutting mechanism.

[0077] The traction mounting frame 401 is provided with a traction cylinder 410, a mounting plate 411 and a longitudinal guide rail 412. The mounting plate 411 is slidably connected to the longitudinal guide rail 412. Both ends of the rubber roller 403 are rotatably connected to the mounting plate 411. The traction cylinder 410 drives the mounting plate 411 to move along the direction of the longitudinal guide rail 412, bringing the rubber roller 403 closer to or away from the traction roller 402.

[0078] The traction cylinder 410 can drive the mounting plate 411 and the rubber roller 403 to move in the direction of the longitudinal guide rail 412, thereby changing the distance between the rubber roller 403 and the traction roller 402. By adjusting the stroke of the traction cylinder 410, the rubber roller 403 is just pressed against the traction roller 402. When the pole piece 5 passes between the rubber roller 403 and the traction roller 402, a clamping force is given to the pole piece 5.

[0079] The traction mounting frame 401 is provided with a transition plate 413, which is located on the side of the traction roller 402 close to the die-cutting mechanism 7, and the upper surface of the transition plate 413 is tangent to the highest position of the traction roller 402 or is 1-3 cm lower than the highest position of the traction roller 402.

[0080] After the pole piece 5 passes through the traction device 4, the clamping force will be lost. The transition plate 413 ensures that the pole piece 5 can be transported to the inside of the die-cutting mechanism 7 in a straight line, that is, it accurately enters the die-cutting position; the upper surface of the transition plate 413 is tangent to the highest position of the traction roller 402 in order to seamlessly connect the pole piece 5, and is 1-3 cm lower than the highest position of the traction roller 402 in order to avoid errors during installation that cause the transition plate 413 to be slightly higher than the traction roller 402, causing the pole piece 5 to bend.

[0081] To sum up, in the present invention, the sensor 6 is used to give a signal, and the driving component 3 controls the unwinding frame 2 and the traction device 4 to move as a whole. Compared with the traditional correcting device, on the one hand, it will not cause pulling of the pole piece 5, thereby avoiding the influence of the correcting device on the quality of the pole piece 5. On the other hand, after the third correcting device of the present invention is corrected, the pole piece 5 is immediately sent to the die-cutting mechanism for die-cutting, thereby avoiding secondary deviation of the pole piece 5 after passing through other devices.

[0082] In addition, the conventional deflection correction device has a delay, that is, when it is found that the pole piece 5 entering the die-cutting mechanism 7 is deflected, the conventional deflection correction device performs deflection correction, but there is a section of the pole piece 5 between the deflection correction device and the die-cutting mechanism 7 that cannot be corrected in time.

[0083] 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 third deviation correction device for an unwinding mechanism, characterized in that: It comprises a large plate (1), an unwinding frame (2) slidably connected to the large plate (1) via a frame guide rail (101), a driving assembly (3) arranged on the large plate (1) and used to drive the unwinding frame (2) to move along the direction of the frame guide rail (101), a traction device (4) connected to the unwinding frame (2), and a sensor (6); The traction device (4) is used to clamp the pole piece (5) and deliver the pole piece (5) to a die-cutting mechanism (7) with a die-cutting base plate (701); the die-cutting base plate (701) is provided with a traction guide rail (702) parallel to the frame guide rail (101); the traction device (4) is slidably connected to the traction guide rail (702); The traction device (4) comprises a traction mounting frame (401), a traction roller (402) rotatably connected to the traction mounting frame (401), a rubber roller (403) arranged above the traction roller (402), and a traction motor (404) driving the traction roller (402); The traction device (4) is fixedly connected to the unwinding frame (2) via an L-shaped connection block (405); The rubber roller (403) and the traction roller (402) jointly clamp the pole piece (5) and send the pole piece (5) to the die-cutting mechanism (7); The traction mounting frame (401) is provided with a transition plate (413), the transition plate (413) is located on a side of the traction roller (402) close to the die-cutting mechanism (7), and the upper surface of the transition plate (413) is tangent to the highest position of the traction roller (402) or is 1-3 cm lower than the highest position of the traction roller (402); The sensor (6) has a U-shaped detection opening (601), and a long strip-shaped sensing position (602) is arranged in the detection opening (601). When one side of the pole piece (5) completely blocks the sensing position (602) or completely detaches from the sensing position (602), the sensor (6) transmits a forward electrical signal and a reverse electrical signal to the driving component (3) respectively; The unwinding frame (2) is provided with a CCD light source (201), the CCD light source (201) is located in front of the traction device (4), and the CCD light source (201) is used to remove defective pole pieces (5).

2. The third deviation-correcting device of the unwinding mechanism according to claim 1 is characterized in that: The driving assembly (3) comprises a driving motor (301), a screw rod (303) connected to the driving motor (301) via a coupling (302), and a connecting piece (304) threadedly connected to the screw rod (303) and fixedly connected to the unwinding frame (2); One end of the screw rod (303) away from the driving motor (301) is rotatably connected to a movable end seat (305).

3. The third deviation-correcting device of the unwinding mechanism according to claim 1 is characterized in that: The traction mounting frame (401) is provided with a synchronous wheel one (406) and a synchronous wheel two (407); the output shaft of the traction motor (404) is connected to the synchronous wheel one (406) via a reduction gear unit (408); the end of the traction roller (402) is connected to the synchronous wheel two (407); the synchronous wheel one (406) and the synchronous wheel two (407) rotate synchronously via a traction belt (409).

4. The third deviation-correcting device of the unwinding mechanism according to claim 1 is characterized in that: The traction mounting frame (401) is provided with a traction cylinder (410), a mounting plate (411) and a longitudinal guide rail (412); the mounting plate (411) is slidably connected to the longitudinal guide rail (412); both ends of the rubber roller (403) are rotatably connected to the mounting plate (411); the traction cylinder (410) drives the mounting plate (411) to move along the longitudinal guide rail (412), and drives the rubber roller (403) to approach or move away from the traction roller (402).

5. The third deviation-correcting device of the unwinding mechanism according to claim 1 is characterized in that: The die-cutting bottom plate (701) is provided with an adjustment track (703) composed of three sliding rods, the adjustment track (703) is slidably connected to an adjustment block (704), and the sensor (6) is mounted on the adjustment block (704).

6. The third deviation-correcting device of the unwinding mechanism according to claim 1 is characterized in that: Four frame guide rails (101) are provided, and two of them are arranged on both sides of the driving assembly (3). Each of the frame guide rails (101) is slidably connected to two sliders (102). The sliders (102) are fixedly connected to the unwinding frame (2). A plurality of L-shaped support blocks (103) are also provided at the bottom of the unwinding frame (2). The lower ends of the support blocks (103) are against the upper surface of the large plate (1).

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