Wire unwinding device for current collector production

Abstract

The present application relates to the technical field of current collector production, and particularly relates to a wire unwinding device for current collector production, which comprises a wire unwinding table, an air inflation mechanism arranged beside the wire unwinding table and used for clamping a current collector wire roll, guide rail tables fixedly connected to both sides of the top of the wire unwinding table through support rods, a top plate fixedly connected to the middle of the side of the guide rail table close to each other, a recessed sliding groove formed in the side of the guide rail table close to each other and located on both sides of the top plate, a pair of cutting plates arranged between the guide rail tables, the cutting plates slidably connected to the inner sides of the sliding grooves, upper springs fixedly connected between the cutting plates and the top plate, and clamping plates arranged on the top of the cutting plates. Through the cooperation of the above-mentioned structure, the excess part of the new material roll and the old material roll can be automatically cut off, the connection part can be automatically aligned after cutting, manual alignment and cutting are not needed, the material replacement efficiency of the wire unwinding device is greatly improved, and the production efficiency of the device is further improved.

Description

Technical Field

[0001] This invention relates to the field of current collector production technology, and in particular to a wire unwinding device for current collector production. Background Technology

[0002] A current collector is a structure or component that collects current. In lithium-ion batteries, it mainly refers to metal foil, such as copper foil or aluminum foil. It can also generally include tabs. Its function is to collect the current generated by the active material of the battery so as to form a larger current output. Therefore, the current collector should be in full contact with the active material and its internal resistance should be as low as possible. In the production process, the current collector is first processed into a roll of fixed length, and then cut into short blanks of different sizes according to the size of the product. Therefore, an unwinding device is needed to unwind the current collector roll.

[0003] The prior art, disclosed in CN117284846A, describes an unwinding device that can automatically adjust the surface tension of aluminum foil. This device is equipped with a crossbar and a support plate. During the unwinding process, the diameter of the aluminum foil roll continuously decreases, causing the support plate to move upward under the action of a first spring. When the support plate moves upward, the crossbar forms a lever structure under the action of a limiting rod, thereby causing the movable frame to move downward. During the downward movement of the movable frame, the aluminum foil roll is pulled, which in turn changes the unwinding tension of the aluminum foil roll.

[0004] Although the unwinding equipment described above can adjust the unwinding tension of the current collector, it still has some defects in actual production. When the copper foil or aluminum foil roll is unwound and a new material is replaced, the worker needs to clamp the ends of the new roll and the old roll in sequence, then use a cutter to cut off the excess, and finally use tape to stick the new roll and the old roll together before the clamping on the material can be released and the equipment can continue production. It cannot automatically cut the ends of the new roll and the old roll when changing the roll, and the worker needs to spend a lot of time aligning and cutting, which is not only time-consuming and labor-intensive, but also greatly reduces the production efficiency of the device.

[0005] Therefore, a wire unwinding device for current collector production is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by providing a wire unwinding device for current collector production.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a wire unwinding device for current collector production, comprising an unwinding table and an air expansion mechanism disposed beside the unwinding table for clamping the current collector wire roller. Guide rails are fixedly connected to both sides of the top of the unwinding table via support rods. A top plate is fixedly connected to the middle of the side of the guide rails that are close to each other. Sliding grooves are provided on both sides of the guide rails that are close to each other and located on both sides of the top plate. A pair of cutting plates are provided between the guide rails. Both sides of the cutting plates are slidably connected to the inner side of the sliding grooves, and upper springs are fixedly connected between the cutting plates and the top plate. A clamping plate is provided on the top of each cutting plate. A clamping mechanism for driving the clamping plate to move is provided below the cutting plate. A driving mechanism for cutting the current collector and connecting the cut ends is provided on the unwinding table.

[0008] The driving mechanism includes a bidirectional lead screw. Fixed plates are fixedly connected to both sides of the top of the feeding table. The bidirectional lead screw is rotatably connected between the fixed plates. A servo motor is fixedly connected to the side wall of one of the fixed plates. The output end of the servo motor passes through the fixed plate and is fixedly connected to the side wall of the bidirectional lead screw. A pair of L-shaped blocks are threaded onto the outer wall of the bidirectional lead screw. A bottom frame is fixedly connected to the bottom of the cutting plate on the side closest to it. A cutter is slidably connected to the inner side of the bottom frame. Each L-shaped block has a triangular block at its top horizontal end. A fixed seat is fixedly connected to the bottom of the cutter at a position corresponding to the triangular block. A roller is rotatably connected to the inner side of the fixed seat. A touch plate for touching the bottom frame is fixedly connected to the top of the L-shaped block on the side furthest from it. A limit plate is rotatably connected to the side of the clamping plate closest to it and above the cutter. A flipping mechanism for driving the limit plate to flip is provided next to each clamping plate.

[0009] In the above technical solution, the horizontal ends of the L-shaped blocks are staggered, and the top of the triangular block is set as a smooth arc surface. Several lower springs are fixedly connected between the top of the bottom frame and the cutter.

[0010] In the above technical solution, the flipping mechanism further includes a flipping gear, and a positioning plate is fixedly connected to the top of each guide rail. One side of the rotating part of the limiting plate passes through the positioning plate and is fixedly connected to the flipping gear. A moving groove is opened on the side wall of one of the positioning plates at a position corresponding to the flipping gear. An adjusting plate is slidably connected to the side wall of the positioning plate. Several tooth blocks that mesh with the flipping gear are fixedly connected to the bottom of the side of the adjusting plate. A T-shaped groove is opened at the bottom of the adjusting plate and passes through the tooth blocks. An L-shaped T-shaped rod is fixedly connected to the side wall of the clamping plate, and the top of the T-shaped rod is slidably connected to the inside of the T-shaped groove.

[0011] In the above technical solution, the clamping plate is further provided with a pair of top grooves on the top, and an L-shaped push block for locking the top of the limiting plate is slidably connected to the inner side of the top groove. A limiting spring is fixedly connected between the side wall of the push block and the inner side of the top groove. Each of the positioning plates is fixedly connected with a pressing rod for pushing the push block on the adjacent side, and the pressing rod and the limiting plate are staggered.

[0012] In the above technical solution, the bottom of the clamping plate is further provided with a stop plate for limiting the flipping angle of the limiting plate, and the bottom of the limiting plate and the position corresponding to the cutter are provided with cutting grooves.

[0013] In the above technical solution, the clamping mechanism further includes an electric telescopic cylinder, and two pairs of electric telescopic cylinders are provided. Each pair of electric telescopic cylinders is fixedly connected to both sides of the bottom of the cutting plate. The output end of the electric telescopic cylinder passes through the cutting plate and is fixedly connected to the bottom of the clamping plate.

[0014] In the above technical solution, further, an adjustment groove is provided at the top of the cutting plate near the side of the air expansion mechanism. An adjustment gear is rotatably connected to the middle position of the inner side of the adjustment groove. A rack that meshes with the adjustment gear is slidably connected to the bottom of the adjustment groove and on both sides of the adjustment gear. A rotating cap is fixedly connected to the bottom of the adjustment gear through the cutting plate. A positioning wheel is rotatably connected to the top of the rack on the side away from the cutting plate. A recessed bottom groove is provided at the bottom of the clamping plate and at the position corresponding to the positioning wheel.

[0015] In the above technical solution, the bottom end of the adjusting groove is provided with a toothed plate that meshes with the adjusting gear. A push rod is fixedly connected to the bottom of the toothed plate and passes through the bottom of the cutting plate. A positioning spring is fixedly connected between the bottom of the cutting plate and the outer wall of the push rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the cooperation of the drive mechanism and the flipping mechanism, not only can the excess parts of the new roll and the old roll be automatically cut off, but the connection point can also be automatically aligned after cutting, eliminating the need for manual alignment and cutting, which greatly improves the material changing efficiency of the unwinding device and thus improves the production efficiency of the device.

[0018] 2. By adjusting the cooperation of gears, racks and positioning wheels, the device can not only position the new material roll during the material change process, avoiding unevenness on both sides after the old material roll on the feeding table is cut and aligned, but also adjust the positioning position according to the different sizes of current collector material rolls, further improving the applicability of the device. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall front view of the unwinding device of the present invention;

[0020] Figure 2 This is a frontal full-section three-dimensional structural diagram of the unwinding device of the present invention;

[0021] Figure 3 This is a bottom-view perspective view of the wire-laying platform of the present invention.

[0022] Figure 4 This is a schematic diagram of the overall appearance structure of the clamping mechanism of the present invention;

[0023] Figure 5 This is a bottom-view perspective view of the cutting plate structure of the present invention;

[0024] Figure 6 Appendix of the present invention Figure 1 A magnified view of the structure at point A in the middle;

[0025] Figure 7 This is a partial bottom-view three-dimensional structural diagram of the clamping plate of the present invention;

[0026] Figure 8 This is a top-view, fully sectional, three-dimensional structural diagram of the cutting plate of the present invention.

[0027] In the diagram: 1. Paying table; 2. Air expansion mechanism; 3. Support rod; 4. Guide rail table; 5. Top plate; 6. Slide groove; 7. Cutting plate; 8. Upper spring; 9. Clamping plate; 10. Two-way lead screw; 11. Fixing plate; 12. Servo motor; 13. L-shaped block; 14. Base frame; 15. Cutting blade; 16. Fixing base; 17. Roller; 18. Triangular block; 19. Touch plate; 20. Limiting plate; 21. Lower spring; 22. Positioning plate; 23. 24. Reversing gear; 25. Moving groove; 26. Adjusting plate; 27. Tooth block; 28. Support plate; 29. ​​Cutting groove; 30. T-slot; 31. T-shaped rod; 32. Top groove; 33. Push block; 34. Limiting spring; 35. Pressing rod; 36. Electric telescopic cylinder; 37. Adjusting groove; 38. Adjusting gear; 39. Rack; 40. Rotating cap; 41. Positioning wheel; 42. Bottom groove; 43. Tooth plate; 44. Push rod; 45. Positioning spring. Detailed Implementation

[0028] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0029] like Figures 1-8The diagram shows a wire unwinding device for current collector production, including an unwinding table 1 and an air expansion mechanism 2 disposed beside the unwinding table 1 for clamping the current collector wire roller. The air expansion mechanism 2 mainly consists of an air expansion roller and support components, which are mature technologies in the prior art and will not be described in detail here. Guide rails 4 are fixedly connected to both sides of the top of the unwinding table 1 via support rods 3. A top plate 5 is fixedly connected to the middle of the side of the guide rails 4 closest to each other. The top plate 5 not only provides support at the junction of the new and old coils but also allows for cutting... The blade 15 serves to store the material and prevent the cutting plate 7 from being obstructed when it moves towards the center. The guide rails 4 are close to each other and have grooves 6 on both sides of the top plate 5. A pair of cutting plates 7 are provided between the guide rails 4. Both sides of the cutting plates 7 are slidably connected to the inside of the grooves 6. The cutting plates 7 and the top plate 5 are fixedly connected with upper springs 8. The top of the cutting plates 7 is provided with clamping plates 9. The bottom of the cutting plates 7 is provided with a clamping mechanism for driving the clamping plates 9 to move. The wire feeding table 1 is provided with a drive mechanism for cutting the current collector and connecting the cutting part.

[0030] The drive mechanism includes a bidirectional lead screw 10. Fixed plates 11 are fixedly connected to both sides of the top of the feeding table 1. The bidirectional lead screw 10 is rotatably connected between the fixed plates 11. A servo motor 12 is fixedly connected to the side wall of one of the fixed plates 11. The output end of the servo motor 12 passes through the fixed plate 11 and is fixedly connected to the side wall of the bidirectional lead screw 10. A pair of L-shaped blocks 13 are threaded onto the outer wall of the bidirectional lead screw 10. A bottom frame 14 is fixedly connected to the bottom end of the cutting plate 7 on one side close to each other. A cutter 15 is slidably connected to the inner side of the bottom frame 14. Triangular blocks 18 are located at the top of the horizontal ends of the L-shaped blocks 13. Fixed seats 1 are fixedly connected to the bottom of the cutter 15 at positions corresponding to the triangular blocks 18. 6. Rollers 17 are rotatably connected to the inner side of the fixed base 16. Touch plates 19 for touching the bottom frame 14 are fixedly connected to the top of the L-shaped blocks 13 on the side away from each other. Limiting plates 20 are rotatably connected to the clamping plates 9 on the side close to each other and above the cutter 15. A flipping mechanism for driving the limiting plates 20 to flip is provided next to each clamping plate 9. The horizontal ends of the L-shaped blocks 13 are staggered to avoid obstruction and affect the two cutting plates 7 from sticking to the side of the top plate 5. The top of the triangular block 18 is set as a smooth arc surface, which can improve the smoothness when the rollers 17 roll. Several lower springs 21 are fixedly connected between the top of the bottom frame 14 and the cutter 15.

[0031] The clamping mechanism includes two pairs of electric telescopic cylinders 35, each pair of which is fixedly connected to both sides of the bottom of the cutting plate 7. The output end of the electric telescopic cylinder 35 passes through the cutting plate 7 and is fixedly connected to the bottom of the clamping plate 9.

[0032] When the current collector coil on the unwinding device is unwound and a replacement coil is needed, firstly, the electric telescopic cylinder 35 on the side away from the air expansion mechanism 2 is started to drive the clamping plate 9 to move downward and clamp the old coil. Then, the servo motor 12 is started to drive the bidirectional lead screw 10 to rotate, which in turn drives the two L-shaped blocks 13 connected by threads to move to both sides, and at the same time drives the touch plate 19 to move to both sides, thereby releasing the pressure on the bottom frame 14. Then, the upper spring 8 pushes the cutting plate 7 to slide to both sides, which will drive the clamping plate 9 and the limiting plate 20 to slide. Then, through the meshing of the tooth block 26 and the flip gear 23, the limiting plate 20 is driven to flip downward. Then, when the limiting plate 20 flips to be flush with the clamping plate 9, the flip gear 23 will slide out of the meshing position with the tooth block 26.

[0033] Then the cutting plate 7 moves to both ends of the chute 6, and at the same time, the push block 32 also moves out of the pressing position with the extrusion rod 34. Under the elastic force of the limiting spring 33, the push block 32 is pushed to lock onto the limiting plate 20, restricting the upward flipping position of the limiting plate 20. Subsequently, when the L-shaped block 13 continues to move, it will be obstructed by the chute 6, and then the movement of the triangular block 18 will push the roller 17 to move upward, thereby driving the cutter 15 to move upward to cut the excess part on the old roll material. At the same time, the lower spring 21 is stretched. Then, when the roller 17 moves to the other side of the triangular block 18, the compression on the roller 17 will be gradually released, thereby pushing the cutter 15 downward through the elastic force of the lower spring 21. The mechanism resets the roll, cuts off the excess portion of the roll, and then removes the old roll from the air expansion mechanism 2. The new roll is then inserted, passed through the guide roller, and placed on another cutting plate 7. At the same time, a portion of the new roll is pulled out of the cutting plate 7. Then, another electric telescopic cylinder 35 is activated to clamp the new roll. The servo motor 12 is then reversed, and the above operation is repeated in reverse to automatically cut off the excess portion of the new roll and the old roll. The new roll and the old roll are then automatically aligned, and the connection point can be held together with tape. The electric telescopic cylinder 35 is then activated to move the clamping plate 9 upward, and the unwinding operation of the collector can continue.

[0034] In order to open the limiting plate 20 during the alignment of the new material roll and the old material roll, and to avoid obstructing the use of tape to bond the joint, the flipping mechanism includes a flipping gear 23. The top of the guide rail 4 is fixedly connected to a positioning plate 22. One side of the rotating part of the limiting plate 20 passes through the positioning plate 22 and is fixedly connected to the flipping gear 23. A moving groove 24 is opened on the side wall of one of the positioning plates 22 and at the position corresponding to the flipping gear 23. An adjusting plate 25 is slidably connected to the side wall of the positioning plate 22. Several tooth blocks 26 that mesh with the flipping gear 23 are fixedly connected to the bottom of the side of the adjusting plate 25. A T-shaped groove 29 is opened at the bottom of the adjusting plate 25 and passes through the tooth blocks 26. An L-shaped T-shaped rod 30 is fixedly connected to the side wall of the clamping plate 9, and the top of the T-shaped rod 30 is slidably connected to the inside of the T-shaped groove 29.

[0035] During the process of cutting off the excess parts of the new and old rolls, the clamping plate 9 and the flipping gear 23 will move below the adjusting plate 25. When the flipping gear 23 moves to the tooth block 26, the flipping gear 23 and the tooth block 26 will mesh with each other, causing the flipping gear 23 to rotate. This will cause the limiting plate 20 to flip upward inside the clamping plate 9, thereby opening the obstruction of the cutting position of the new and old rolls and avoiding affecting the subsequent use of adhesive tape for bonding. Conversely, when the drive mechanism drives the cutting plate 7 to move to both sides, the limiting plate 20 will flip downward to avoid affecting the normal cutting of the excess parts of the new and old rolls. Moreover, during the process of the clamping mechanism driving the clamping plate 9 to move up and down, the sliding of the T-shaped rod 30 in the T-shaped groove 29 will cause the adjusting plate 25 to move up and down on the side wall of the positioning plate 22 at the same time.

[0036] To further improve the stability of the current collector coil during cutting, a pair of top grooves 31 are provided on the top of the clamping plate 9. An L-shaped push block 32 for locking the top of the limiting plate 20 is slidably connected to the inside of the top groove 31. A limiting spring 33 is fixedly connected between the side wall of the push block 32 and the inside of the top groove 31. A pressing rod 34 for pushing the push block 32 is fixedly connected to the side of the positioning plate 22. The pressing rod 34 and the limiting plate 20 are staggered to avoid the pressing rod 34 from obstructing the normal rotation of the limiting plate 20. A stop plate 27 for limiting the rotation angle of the limiting plate 20 is fixedly connected to the bottom of the clamping plate 9. The stop plate 27 can limit the downward rotation position of the limiting plate 20 to prevent the limiting plate 20 from rotating downward when the clamping mechanism drives the clamping plate 9 to move downward. A cutting groove 28 is provided at the bottom of the limiting plate 20 and at the position corresponding to the cutter 15. The cutting groove 28 allows the cutter 15 to be inserted deeper to ensure complete removal of the excess part of the current collector.

[0037] When the drive mechanism moves the cutting plate 7 to both sides to cut the excess parts of the new and old material rolls, the push block 32 loses the pressure of the extrusion rod 34 and gets stuck between the clamping plate 9 and the limiting plate 20 under the elastic force of the limiting spring 33. This causes the limiting plate 20 to rotate upwards, preventing the cutter 15 from losing its force when cutting the excess parts of the new and old material rolls, thus affecting the normal cutting of the roll material. Furthermore, as the drive mechanism drives the cutting plate 7 to move towards the center, it gradually moves the push block 32 to the side of the extrusion rod 34. The extrusion rod 34 then pushes the push block 32 to slide in the top groove 31, while gradually compressing the limiting spring 33, thus pushing the push block 32 to the top of the limiting plate 20 and preventing it from affecting the normal flipping of the limiting plate 20.

[0038] To enable positioning during roll material replacement, an adjustment groove 36 is provided at the top of the cutting plate 7 near the air expansion mechanism 2. An adjustment gear 37 is rotatably connected to the middle of the inner side of the adjustment groove 36. A rack 38 that meshes with the adjustment gear 37 is slidably connected to the bottom of the adjustment groove 36 on both sides of the adjustment gear 37. A rotating cap 39 is fixedly connected to the bottom of the adjustment gear 37 through the cutting plate 7. A positioning wheel 40 is rotatably connected to the top of the rack 38 on the opposite side. A recessed bottom groove 41 is provided at the bottom of the clamping plate 9, corresponding to the positioning wheel 40. The bottom groove 41 prevents the clamping plate 9 from being obstructed by the positioning wheel 40 when it moves downward to clamp the roll material. A toothed plate 42 that meshes with the adjustment gear 37 is provided at the bottom of the adjustment groove 36. A push rod 43 is fixedly connected to the bottom of the toothed plate 42 and extends through the bottom of the cutting plate 7. A positioning spring 44 is fixedly connected between the bottom of the cutting plate 7 and the outer wall of the push rod 43.

[0039] The positioning wheels 40 serve a positioning function when new rolls are placed on the cutting plate 7. They align the two sides of the current collector roll with the outer wall of the positioning wheels 40, preventing misalignment between the new and old rolls and ensuring proper alignment during roll changing. When unwinding current collectors of different sizes, adjusting the spacing between the positioning wheels 40 is necessary. This can be achieved by pressing the push rod 43 upwards, causing the toothed plate 42 to slide downwards and engage with the adjusting gear 37, simultaneously compressing the positioning spring 44. Release the position restriction on the adjusting gear 37, and then rotate the rotating cap 39 to drive the adjusting gear 37 to rotate. This causes the two meshing racks 38 to move closer to each other, which in turn causes the two positioning wheels 40 to move towards the center in the adjusting groove 36, thereby adjusting the distance between the positioning wheels 40. After the adjustment is completed, release the push rod 43, and then the elastic force of the positioning spring 44 pulls the push rod 43 downward, which in turn causes the toothed plate 42 to move downward and slide to the meshing point with the adjusting gear 37, thus releasing the fixation of the adjusted position of the positioning wheels 40.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A wire unwinding device for current collector production, comprising an unwinding table (1) and an air expansion mechanism (2) disposed beside the unwinding table (1) for clamping the current collector wire roller, wherein guide rails (4) are fixedly connected to both sides of the top of the unwinding table (1) via support rods (3), characterized in that: A top plate (5) is fixedly connected to the middle of the side of the guide rail (4). Slide grooves (6) are provided on both sides of the top plate (5) and the side of the guide rail (4) is close to each other. A pair of cutting plates (7) are provided between the guide rails (4). Both sides of the cutting plates (7) are slidably connected to the inside of the slide grooves (6). An upper spring (8) is fixedly connected between the cutting plates (7) and the top plate (5). A clamping plate (9) is provided on the top of the cutting plates (7). A clamping mechanism for driving the clamping plate (9) to move is provided below the cutting plates (7). A drive mechanism for cutting the current collector and connecting the cutting part is provided on the wire feeding table (1). The driving mechanism includes a bidirectional lead screw (10). Fixed plates (11) are fixedly connected to both sides of the top of the wire feeding table (1). The bidirectional lead screw (10) is rotatably connected between the fixed plates (11). A servo motor (12) is fixedly connected to the side wall of one of the fixed plates (11). The output end of the servo motor (12) passes through the fixed plate (11) and is fixedly connected to the side wall of the bidirectional lead screw (10). A pair of L-shaped blocks (13) are threaded onto the outer wall of the bidirectional lead screw (10). A bottom frame (14) is fixedly connected to the bottom end of the cutting plate (7) on one side. The inner side of the bottom frame (14) is slidably connected... The L-shaped block (13) is equipped with a cutter (15), and each of the top of the horizontal end of the L-shaped block (13) has a triangular block (18). The bottom of the cutter (15) and the position corresponding to the triangular block (18) are fixedly connected to a fixed seat (16). The inner side of the fixed seat (16) is rotatably connected to a roller (17). The top of the L-shaped block (13) is fixedly connected to a touch plate (19) for touching the bottom frame (14) on the side away from the top. The clamping plate (9) is rotatably connected to a limit plate (20) on the side close to the cutter (15). The clamping plate (9) is provided with a flipping mechanism for driving the limit plate (20) to flip. The flipping mechanism includes a flipping gear (23). The top of the guide rail (4) is fixedly connected to a positioning plate (22). One side of the rotating part of the limiting plate (20) passes through the positioning plate (22) and is fixedly connected to the flipping gear (23). A moving groove (24) is opened on the side wall of one of the positioning plates (22) and at the position corresponding to the flipping gear (23). An adjusting plate (25) is slidably connected to the side wall of the positioning plate (22). Several tooth blocks (26) that mesh with the flipping gear (23) are fixedly connected to the bottom of the side of the adjusting plate (25). A T-shaped groove (29) is opened at the bottom of the adjusting plate (25) and passes through the tooth blocks (26). An L-shaped T-shaped rod (30) is fixedly connected to the side wall of the clamping plate (9), and the top of the T-shaped rod (30) is slidably connected to the inside of the T-shaped groove (29). The clamping plate (9) has a pair of top grooves (31) on its top. The top grooves (31) are slidably connected to an L-shaped push block (32) for locking the top of the limiting plate (20). A limiting spring (33) is fixedly connected between the side wall of the push block (32) and the inside of the top groove (31). The positioning plate (22) is fixedly connected to a pressing rod (34) for pushing the push block (32) on the side closest to each other. The pressing rod (34) and the limiting plate (20) are staggered.

2. The wire unwinding device for current collector production according to claim 1, characterized in that: The L-shaped blocks (13) are staggered at their lateral ends, and the top of the triangular block (18) is set as a smooth arc surface. Several lower springs (21) are fixedly connected between the top of the bottom frame (14) and the cutter (15).

3. The wire unwinding device for current collector production according to claim 1, characterized in that: The bottom of the clamping plate (9) is fixedly connected to a stop plate (27) for limiting the flipping angle of the limiting plate (20). The bottom of the limiting plate (20) and the corresponding position of the cutter (15) are provided with cutting grooves (28).

4. The wire unwinding device for current collector production according to claim 1, characterized in that: The clamping mechanism includes an electric telescopic cylinder (35), and there are two pairs of electric telescopic cylinders (35). Each pair of electric telescopic cylinders (35) is fixedly connected to both sides of the bottom of the cutting plate (7). The output end of the electric telescopic cylinder (35) passes through the cutting plate (7) and is fixedly connected to the bottom of the clamping plate (9).

5. The wire unwinding device for current collector production according to claim 1, characterized in that: An adjustment groove (36) is provided at the top of the cutting plate (7) near the side of the air expansion mechanism (2). An adjustment gear (37) is rotatably connected to the middle position of the inner side of the adjustment groove (36). A rack (38) that meshes with the adjustment gear (37) is slidably connected to the bottom of the adjustment groove (36) and on both sides of the adjustment gear (37). A rotating cap (39) is fixedly connected to the bottom of the adjustment gear (37) through the cutting plate (7). A positioning wheel (40) is rotatably connected to the top of the rack (38) on the side away from the top. A recessed bottom groove (41) is provided at the bottom of the clamping plate (9) and at the position corresponding to the positioning wheel (40).

6. The wire unwinding device for current collector production according to claim 5, characterized in that: The bottom end of the adjusting groove (36) is provided with a toothed plate (42) that meshes with the adjusting gear (37). A push rod (43) is fixedly connected to the bottom of the toothed plate (42) and passes through the bottom of the cutting plate (7). A positioning spring (44) is fixedly connected between the bottom of the cutting plate (7) and the outer wall of the push rod (43).

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