Laser precision welding device for cylindrical lithium battery cover

Abstract

The invention discloses a laser precision welding device for a cylindrical lithium battery cover, and relates to the technical field of welding devices.The laser precision welding device comprises a box body, fixing frames are fixedly connected to the two ends of the front side of the box body, side plates are arranged on the inner sides of the two fixing frames, a material overturning table is fixedly connected to the tops of the side plates, and a welding table is fixedly connected to the interior of the box body; collecting barrels are fixedly connected to the two sides of the bottom of the welding table correspondingly, screw rods are arranged in the collecting barrels, guide discs are fixedly connected to the top ends of the screw rods, fixing discs are rotatably connected to the tops of the guide discs, sliding blocks are slidably connected to the interiors of the multiple sliding sleeves correspondingly, and round rods are fixedly connected to the tops of the multiple sliding blocks correspondingly. According to the laser precise welding device for the cylindrical lithium battery cover, the multiple limiting plates can be precisely folded or unfolded, it is ensured that a battery and the battery cover are aligned in the welding process, and therefore the welding precision and consistency are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, and in particular to a laser precision welding device for cylindrical lithium battery covers. Background Art

[0002] Cylindrical lithium batteries are a common lithium-ion battery packaging format, characterized by a cylindrical metal casing (usually steel or aluminum) containing a positive electrode, negative electrode, separator, and electrolyte. These batteries offer advantages such as structural stability, high energy density, and low cost. These batteries are widely used in electric vehicles, power tools, energy storage systems, and consumer electronics. Their standardized dimensions and mature production processes facilitate large-scale manufacturing. However, the welding of the battery cover requires high precision and sealing to prevent leakage or performance degradation, placing high demands on welding technology and equipment.

[0003] In the prior art, a Chinese patent with authorization announcement number CN118578015A discloses an automatic welding device for a battery cover, comprising a frame, a welding robot fixedly mounted on one side of the top of the frame, an inner frame embedded inside the frame, a slidable support ring provided between the frame and the inner frame, and a plurality of evenly distributed transmission mechanisms mounted on the support ring.

[0004] During the welding process of the battery and the battery cover, the above-mentioned welding device needs to manually place the battery in the corresponding position when loading and unloading the battery before subsequent processing can be carried out. Moreover, when welding the battery cover, especially the cylindrical battery, the battery shell and the battery end cover need to be completely aligned before subsequent welding can be carried out. Otherwise, the battery cover and the battery shell will deviate during welding, resulting in the subsequent cylindrical battery being unable to be installed in the cavity of the battery pack due to the raised edge. The above-mentioned scheme only clamps the battery during the battery welding process. There is no mechanism to ensure the correspondence between the battery cover and the battery during the alignment of the battery cover, which is prone to deviations and leads to unstable welding quality. Summary of the Invention

[0005] The object of the present invention is to provide a laser precision welding device for cylindrical lithium battery covers to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: A laser precision welding device for a cylindrical lithium battery cover, comprising a box body, wherein both ends of the front side of the box body are fixedly connected to a fixing frame, side plates are provided on the inner sides of the two fixing frames, a turning table is fixedly connected to the top of the side plates, a welding table is fixedly connected to the inside of the box body, and both sides of the bottom of the welding table are fixedly connected to a collecting cylinder, a spiral rod is provided inside the collecting cylinder, the top of the spiral rod is fixedly connected to a guide plate, the top of the guide plate is rotatably connected to a fixed plate, a plurality of sleeves are fixedly connected to the bottom end of the collecting cylinder in an annular array, a plurality of sleeves are slidably connected to sliders, a plurality of sliders are fixedly connected to round rods on the tops, a plurality of round rods respectively penetrate a plurality of sleeve top walls and are slidably connected to the sleeves, a plurality of round rods are fixedly connected to limit plates on the tops, a plurality of guide grooves are provided inside the fixed plate, a plurality of round rods respectively penetrate a plurality of guide grooves and are slidably connected to the plurality of guide grooves, a plurality of arc grooves are provided inside the guide plate, a plurality of round rods respectively penetrate a plurality of arc grooves and are slidably connected to the plurality of arc grooves.

[0007] Preferably, two spiral grooves are provided on the outer side of the spiral rod, and the two spiral grooves are arranged opposite to each other, and both sides of the bottom end of the collecting cylinder are fixedly connected with L-shaped plates.

[0008] Preferably, the two L-shaped plates are fixedly connected to a guide rod on one side thereof, and the two guide rods are respectively slidably connected to the inside of the two spiral grooves and adapted to the two spiral grooves. The spiral grooves are limited by the guide rods, and when the spiral rods descend, the spiral grooves and the guide rods will slide relative to each other, thereby causing the fixed disk to rotate.

[0009] Preferably, a support ring is fixedly connected between the two L-shaped plates, the spiral rod passes through the support ring and is movably connected to the support ring, the bottom end of the spiral rod is rotatably connected to a rotating plate, and a tension spring is fixedly connected between the support ring and the rotating plate. The tension spring is sleeved on the outside of the spiral rod, and the rotating plate and the spiral rod are limited and supported by the tension spring.

[0010] Preferably, a movable plate is provided on the top of the box body, and an electric guide rail is fixedly connected to the top of the box body. The movable plate is slidably connected to the top of the box body through the electric guide rail, so that the movable plate can move on the top of the box body.

[0011] Preferably, a first hydraulic cylinder is fixedly connected to the inside of the movable plate, and the bottom end of the output end of the first hydraulic cylinder is fixedly connected to a horizontal plate. A lifting plate is provided between the movable plate and the horizontal plate. Vacuum pumps are fixedly connected to both sides of the lifting plate, and the two vacuum pump input ends are fixedly connected to air pipes, and the bottom ends of the two air pipes are fixedly connected to suction cups. When the vacuum pump is started, the air pipes evacuate the inside of the suction cups, so that the suction cups adsorb and fix the battery cover.

[0012] Preferably, both sides of the top of the lifting plate are fixedly connected to limit rods, the tops of the two limit rods are fixedly connected to upper baffles, springs are sleeved on the outsides of the two limit rods, and the two ends of the springs are respectively fixedly connected to the upper baffles and the lifting plate, and through holes compatible with the two upper baffles are opened on both sides of the interior of the movable plate to support and guide the lifting plate and the vacuum pump, thereby improving the stability of the lifting plate and the vacuum pump during movement.

[0013] Preferably, both sides of the top of the horizontal plate are fixedly connected to the limiting rails, the limiting rails are rotatably connected to the limiting disk, the bottom of the limiting disk is fixedly connected to a disk, the disk is rotatably connected to the inside of the horizontal plate, one side of the bottom of the disk is fixedly connected to a robotic arm, a laser welding head is installed at the execution end of the robotic arm, both sides of the top of the horizontal plate are fixedly connected to the motor, the output end of the motor is fixedly connected to a guide gear, the guide gear is meshed with the ring gear, so that the motor starts to drive the guide gear to rotate, and thereby drives the ring gear to rotate, so that the ring gear drives the limiting disk and the disk to rotate.

[0014] Preferably, both sides of the side plates are fixedly connected with rotating shafts, and one side of the top of the two fixing frames is fixedly connected with support plates, and the two rotating shafts respectively pass through the two support plates and are rotatably connected to the two support plates, and the rotating shaft passes through the side wall of the box and is rotatably connected to the box, and one side of the box is fixedly connected with a second hydraulic cylinder, and the output end of the second hydraulic cylinder is fixedly connected with a tooth plate, and one end of one of the rotating shafts extends to the outside of the box and is fixedly connected with a transmission gear, and the tooth plate is meshed with the transmission gear, so that the second hydraulic cylinder is started to drive the tooth plate to move, and the tooth plate drives the transmission gear to rotate, thereby driving the rotating shaft and the turning table to flip.

[0015] Preferably, both sides of the box are fixedly connected with unloading racks, and the two unloading racks respectively correspond to the grooves on both sides of the top of the turning table. The upper conveyor and the lower conveyor are fixedly connected inside the box, and the lower conveyor is arranged at the bottom of the upper conveyor. The lower conveyor corresponds to the welding table, and the upper conveyor corresponds to the lifting height of the suction cup.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present application sets a first hydraulic cylinder to drive the cross plate to descend, so that the suction cup presses the battery cover and the battery and pushes them downward, thereby causing the battery to push the fixed plate to descend, so that the fixed plate drives the guide plate and the spiral rod to descend. When the spiral rod is in the process of descending, the guide rod guides the spiral groove, and the spiral rod rotates when descending, so that the spiral rod drives the guide plate to rotate, and the multiple arc grooves inside the guide plate limit and guide the multiple round rods, thereby limiting the round rods, so that the multiple round rods and the limit plates are retracted toward the middle, and the multiple round rods drive the multiple sliders to move inside the sliding sleeve, and the multiple round rods and the limit plates limit the batteries, so that the batteries and the battery cover are aligned, thereby improving the welding accuracy. Through the linkage design of the spiral rod, the guide plate and the fixed plate, combined with the limiting and guiding of the round rods by the arc grooves and the guide grooves, the multiple limit plates can be accurately retracted or opened, ensuring that the battery and the battery cover are aligned during the welding process, thereby significantly improving the welding accuracy and consistency.

[0017] 2. In this application, after the suction cup presses down on the battery, the battery will provide an upward force to the suction cup, so that the suction cup drives the vacuum pump and the lifting plate to rise, and then the lifting plate compresses the spring, so that the horizontal plate and the lifting plate move relative to each other, and the horizontal plate drives the disc and the robotic arm to descend to the side of the battery cover. By controlling the robotic arm, the laser welding head is driven to move to the outside of the battery and the battery cover, so that the motor starts and drives the guide gear to rotate, and the guide gear drives the ring gear to rotate, and then drives the limit plate and the disc to rotate, and the laser welding head is used to weld the battery and the battery cover around, so as to perform precise welding on the battery. The device adopts automated components such as electric guide rails, hydraulic cylinders, vacuum pumps and robotic arms to realize automatic adsorption, transportation, positioning and welding of the battery cover, reducing manual intervention, and improving production efficiency and convenience of operation.

[0018] 3. The present application drives the air pipe and the suction cup to rise by resetting the first hydraulic cylinder, so that the tension spring rises and drives the spiral rod to rise, the spiral rod drives the guide plate and the fixed plate to rise, the fixed plate drives the battery to move upward, and the spiral rod reverses when rising, so as to make multiple round rods and limit plates open outward, release the limit on the battery, and then turn off the vacuum pump, the suction cup stops adsorbing the battery, and the subsequent turning table loads the battery again, and the subsequent battery pushes the welded battery backward, so that the welded battery is flipped over to the top of the lower conveyor for transmission. The device integrates multiple functional modules such as the turning table, conveyor and welding table, and can complete the whole process of loading, positioning, welding and unloading of the battery, optimizes the production process, and saves space and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the rear structure; Figure 3This is a structural diagram of the material turning table of the present invention; Figure 4 It is a structural schematic diagram of the movable plate of the present invention; Figure 5 It is a structural schematic diagram of the fixing frame of the present invention; Figure 6 It is a structural schematic diagram of the welding station of the present invention; Figure 7 Schematic diagram of the structure of the sliding sleeve of the present invention; Figure 8 Schematic diagram of the structure of the spiral rod of the present invention; Figure 9 It is a structural schematic diagram of the guide plate of the present invention; Figure 10 Schematic diagram of the structure of the limiting plate of the present invention; Figure 11 It is a structural schematic diagram of the lifting plate of the present invention; Figure 12 It is a structural schematic diagram of the suction cup of the present invention; Figure 13 Schematic diagram of the structure of the limit rail of the present invention; Figure 14 It is a structural schematic diagram of the limiting plate of the present invention.

[0020] Numbers in the figure: 1, box body; 2, fixed frame; 3, side plate; 4, turning table; 5, unloading rack; 6, welding table; 7, collecting cylinder; 8, spiral rod; 9, guide plate; 10, fixed plate; 11, sliding sleeve; 12, slider; 13, round rod; 14, limit plate; 15, guide groove; 16, arc groove; 17, spiral groove; 18, L-shaped plate; 19, guide rod; 20, support ring; 21, rotating plate; 22, tension spring; 23, moving plate; 24, first hydraulic cylinder; 25, horizontal Plate; 26. Lifting plate; 27. Vacuum pump; 28. Air pipe; 29. ​​Suction cup; 30. Limit rod; 31. Spring; 32. Upper baffle; 33. Disc; 34. Limit disc; 35. Limit rail; 36. Ring gear; 37. Motor; 38. Guide gear; 39. Robotic arm; 40. Laser welding head; 41. Rotating shaft; 42. Support plate; 43. Transmission gear; 44. Second hydraulic cylinder; 45. Gear plate; 46. Upper conveyor; 47. Lower conveyor; 48. Electric guide rail. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example: Figures 1-14 As shown, the present invention provides a technical solution for a laser precision welding device for cylindrical lithium battery covers, including a box body 1, wherein both ends of the front side of the box body 1 are fixedly connected to a fixing frame 2, and side plates 3 are provided on the inner sides of the two fixing frames 2. Both sides of the side plates 3 are fixedly connected to a rotating shaft 41, and one side of the top of the two fixing frames 2 is fixedly connected to a support plate 42. The two rotating shafts 41 respectively penetrate the two support plates 42 and are rotatably connected to the two support plates 42. The rotating shaft 41 penetrates the side wall of the box body 1 and is rotatably connected to the box body 1. A second hydraulic cylinder 44 is fixedly connected to one side of the box body 1, and a tooth plate 45 is fixedly connected to the output end of the second hydraulic cylinder 44. One of the rotating shafts 41 extends to the outer side of the box body 1 and is fixedly connected to a transmission gear 43. The tooth plate 45 is meshed with the transmission gear 43, so that the second hydraulic cylinder 44 is started to drive the tooth plate 45 to move, and the tooth plate 45 drives the transmission gear 43 to rotate, thereby driving the rotating shaft 41 and the turning table 4 to flip.

[0023] The top of the side panel 3 is fixedly connected to the turning table 4, the inside of the box body 1 is fixedly connected to the welding table 6, the bottom two sides of the welding table 6 are fixedly connected to the collecting cylinder 7, a spiral rod 8 is provided inside the collecting cylinder 7, the top of the spiral rod 8 is fixedly connected to the guide plate 9, the top of the guide plate 9 is rotatably connected to the fixed plate 10, the bottom end of the collecting cylinder 7 is fixedly connected to a plurality of sliding sleeves 11 in an annular array, the interiors of the plurality of sliding sleeves 11 are slidably connected to sliders 12, the tops of the plurality of sliders 12 are fixedly connected to round rods 13, the plurality of round rods 13 respectively penetrate the top walls of the plurality of sliding sleeves 11 and are slidably connected to the sliding sleeves 11, the tops of the plurality of round rods 13 are fixedly connected to limiting plates 14, a plurality of guide grooves 15 are provided inside the fixed plate 10, the plurality of round rods 13 respectively penetrate the plurality of guide grooves 15 and are slidably connected to the plurality of guide grooves 15, a plurality of arc grooves 16 are provided inside the guide plate 9, the plurality of round rods 13 respectively penetrate the plurality of arc grooves 16 and are slidably connected to the plurality of arc grooves 16, The rod 13 is limited and guided so that the round rod 13 moves along the intersection of the guide groove 15 and the arc groove 16. Two spiral grooves 17 are provided on the outside of the spiral rod 8. The two spiral grooves 17 are arranged opposite to each other. L-shaped plates 18 are fixedly connected on both sides of the bottom end of the collecting cylinder 7. The two L-shaped plates 18 are fixedly connected on one side. The two guide rods 19 are slidably connected to the inside of the two spiral grooves 17 and adapt to the two spiral grooves 17. The spiral groove 17 is limited by the guide rod 19. When the spiral rod 8 descends, the spiral groove 17 and the guide rod 19 will slide relative to each other, so that the fixed disk 10 rotates. A support ring 20 is fixedly connected between the two L-shaped plates 18. The spiral rod 8 passes through the support ring 20 and is movably connected to the support ring 20. The bottom end of the spiral rod 8 is rotatably connected to a rotating plate 21. A tension spring 22 is fixedly connected between the support ring 20 and the rotating plate 21. The tension spring 22 is sleeved on the outside of the spiral rod 8, and the rotating plate 21 and the spiral rod 8 are limited and supported by the tension spring 22.

[0024] A movable plate 23 is provided on the top of the box body 1, and an electric guide rail 48 is fixedly connected to the top of the box body 1. The movable plate 23 is slidably connected to the top of the box body 1 through the electric guide rail 48, so that the movable plate 23 can move on the top of the box body 1. A first hydraulic cylinder 24 is fixedly connected inside the movable plate 23, and a horizontal plate 25 is fixedly connected to the bottom of the output end of the first hydraulic cylinder 24. A lifting plate 26 is provided between the movable plate 23 and the horizontal plate 25. Vacuum pumps 27 are fixedly connected to both sides of the lifting plate 26. The input ends of the two vacuum pumps 27 are fixedly connected to air pipes 28, and the bottom ends of the two air pipes 28 are fixedly connected to suction cups 29. By starting the vacuum pump 27, the air pipe 28 draws a vacuum on the inside of the suction cup 29, so that the suction cup 29 adsorbs and fixes the battery cover. The limiting rods 30 are fixedly connected to both sides of the top of the lifting plate 26. The tops of the two limiting rods 30 are fixedly connected to the upper baffles 32. The outer sides of the two limiting rods 30 are sleeved with springs 31. The two ends of the springs 31 are fixedly connected to the upper baffles 32 and the lifting plate 26 respectively. Through holes that are compatible with the two upper baffles 32 are opened on both sides of the movable plate 23 to support and guide the lifting plate 26 and the vacuum pump 27, thereby improving the stability of the lifting plate 26 and the vacuum pump 27 when moving.

[0025] Both sides of the top of the horizontal plate 25 are fixedly connected to the limit rails 35, and the limit rails 35 are internally rotatably connected to the limit disk 34. The bottom of the limit disk 34 is fixedly connected to the disk 33, and the disk 33 is rotatably connected to the inside of the horizontal plate 25. One side of the bottom of the disk 33 is fixedly connected to a mechanical arm 39. A laser welding head 40 is installed at the end of the mechanical arm 39. Both sides of the top of the horizontal plate 25 are fixedly connected to the motor 37. The output end of the motor 37 is fixedly connected to a guide gear 38. The guide gear 38 is meshed with the ring gear 36. The motor 37 is started to drive the guide gear 38 to rotate, and thereby drive the ring gear 36 to rotate, so that the ring gear 36 drives the limit plate 34 and the disc 33 to rotate. The two sides of the box body 1 are fixedly connected with the unloading rack 5, and the two unloading racks 5 respectively correspond to the grooves on both sides of the top of the turning table 4. The upper conveyor 46 and the lower conveyor 47 are fixedly connected inside the box body 1. The lower conveyor 47 is arranged at the bottom of the upper conveyor 46. The lower conveyor 47 corresponds to the welding table 6, and the upper conveyor 46 corresponds to the lifting height of the suction cup 29.

[0026] When this solution is in use, the unloading racks 5 on both sides are arranged and lowered, and the battery at the bottom enters the grooves on both sides of the turning table 4. The battery is limited by the grooves, and the subsequent batteries are blocked. The second hydraulic cylinder 44 is started to drive the tooth plate 45 to move, and the tooth plate 45 drives the transmission gear 43 and the rotating shaft 41 to rotate when it descends, and then the rotating shaft 41 drives the side plate 3 and the turning table 4 to turn upward. After lifting the battery, the battery falls on both sides of the welding table 6, and the fixed plate 10 supports the battery. When the turning table 4 turns over, the two sides of the turning table 4 block the batteries above the unloading rack 5 to prevent subsequent batteries from falling.

[0027] The upper conveyor 46 transports the battery cover, and the cross plate 25 is driven down by the first hydraulic cylinder 24, and the lifting plate 26 and the vacuum pump 27 are driven down, and the suction cup 29 is fitted with the battery cover, and the vacuum pump 27 is started to vacuum the inside of the suction cup 29 to adsorb the battery cover, so that the fixed frame 2 moves the movable plate 23 forward to above the welding table 6. At this time, the position of the suction cup 29 corresponds to the center of the circle of the collecting cylinder 7, so that the position of the battery cover and the battery correspond. The cross plate 25 is driven down by the output end of the first hydraulic cylinder 24, and the lifting plate 26 and the vacuum pump 27 are driven to move above the battery. The cross plate 25 is driven down by the first hydraulic cylinder 24, and the air pipe 28 and the suction cup 29 are driven down, so that the suction cup 29 drives the battery cover to move to the top of the battery, and then the first hydraulic cylinder 24 drives the cross plate 25 to move down. The plate 25 descends, causing the suction cup 29 to press and push the battery cover and the battery downward, and then the battery pushes the fixed plate 10 to descend, causing the fixed plate 10 to drive the guide plate 9 and the screw rod 8 to descend. When the screw rod 8 is in the process of descending, the guide rod 19 guides the spiral groove 17, and the screw rod 8 rotates when descending, causing the screw rod 8 to drive the guide plate 9 to rotate. The multiple arc grooves 16 inside the guide plate 9 limit and guide the multiple round rods 13, thereby limiting the round rods 13, causing the multiple round rods 13 and the limiting plates 14 to converge toward the middle, and the multiple round rods 13 drive the multiple sliders 12 to move inside the sliding sleeve 11. The multiple round rods 13 and the limiting plates 14 limit the batteries, squeezing the batteries to the center of the collecting tube 7 and fixing them, so that the batteries and the battery covers are aligned, thereby improving the welding accuracy.

[0028] After the suction cup 29 presses down on the battery, the battery will provide an upward force to the suction cup 29, so that the suction cup 29 drives the vacuum pump 27 and the lifting plate 26 to rise, and then the lifting plate 26 compresses the spring 31, so that the horizontal plate 25 and the lifting plate 26 move relative to each other, and the horizontal plate 25 drives the disc 33 and the robotic arm 39 to descend to the side of the battery cover. By controlling the robotic arm 39, the laser welding head 40 is driven to move to the outside of the battery and the battery cover, so that the motor 37 is started to drive the guide gear 38 to rotate, and the guide gear 38 drives the ring gear 36 to rotate, and then the ring gear 36 drives the limit plate 34 and the disc 33 to rotate, and the laser welding head 40 is used to weld the battery and the battery cover around. In this way, the battery is accurately welded.

[0029] The first hydraulic cylinder 24 is reset to drive the air pipe 28 and the suction cup 29 to rise, and the tension spring 22 rises to drive the screw rod 8 to rise, so that the screw rod 8 drives the guide plate 9 and the fixed plate 10 to rise, and the fixed plate 10 drives the battery to move upward. The screw rod 8 reverses when it rises, so as to make multiple round rods 13 and limit plates 14 open outward, releasing the limit on the battery, and then the vacuum pump 27 is turned off, and the suction cup 29 stops adsorbing the battery. The subsequent turning table 4 loads the battery again, and the subsequent battery pushes the welded battery backward, so that the welded battery is overturned to the top of the lower conveyor 47 for transmission.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A laser precision welding device for cylindrical lithium battery covers, comprising a box (1), characterized in that: Both ends of the front side of the box body (1) are fixedly connected to a fixing frame (2), the inner sides of the two fixing frames (2) are provided with side panels (3), the tops of the side panels (3) are fixedly connected to a turning table (4), the inside of the box body (1) is fixedly connected to a welding table (6), the bottom sides of the welding table (6) are fixedly connected to a collecting cylinder (7), a spiral rod (8) is provided inside the collecting cylinder (7), the top of the spiral rod (8) is fixedly connected to a guide plate (9), the top of the guide plate (9) is rotatably connected to a fixing plate (10), the bottom end of the inside of the collecting cylinder (7) is fixedly connected to a plurality of sliding sleeves (11) in an annular array, the insides of the plurality of sliding sleeves (11) are all sliding sleeves (11). The sliding plate (10) is movably connected to a slider (12), and the tops of the plurality of sliding plates (12) are fixedly connected to round rods (13), and the plurality of round rods (13) respectively penetrate the top walls of the plurality of sliding sleeves (11) and are slidably connected to the sliding sleeves (11). The tops of the plurality of round rods (13) are fixedly connected to a limiting plate (14), and the interior of the fixed plate (10) is provided with a plurality of guide grooves (15), and the plurality of round rods (13) respectively penetrate the plurality of guide grooves (15) and are slidably connected to the plurality of guide grooves (15). The interior of the guide plate (9) is provided with a plurality of arc grooves (16), and the plurality of round rods (13) respectively penetrate the plurality of arc grooves (16) and are slidably connected to the plurality of arc grooves (16).

2. The laser precision welding device for cylindrical lithium battery covers according to claim 1, characterized in that: Two spiral grooves (17) are formed on the outer side of the spiral rod (8), and the two spiral grooves (17) are arranged opposite to each other. L-shaped plates (18) are fixedly connected to both sides of the bottom end of the collecting cylinder (7).

3. The laser precision welding device for cylindrical lithium battery covers according to claim 2, characterized in that: A guide rod (19) is fixedly connected to one opposite side of the two L-shaped plates (18), and the two guide rods (19) are respectively slidably connected to the inside of the two spiral grooves (17) and adapted to the two spiral grooves (17).

4. The laser precision welding device for cylindrical lithium battery covers according to claim 2, characterized in that: A support ring (20) is fixedly connected between the two L-shaped plates (18), the spiral rod (8) passes through the support ring (20) and is movably connected to the support ring (20), the bottom end of the spiral rod (8) is rotatably connected to a rotating plate (21), a tension spring (22) is fixedly connected between the support ring (20) and the rotating plate (21), and the tension spring (22) is sleeved on the outside of the spiral rod (8).

5. The laser precision welding device for cylindrical lithium battery covers according to claim 1, characterized in that: A movable plate (23) is provided on the top of the box body (1), an electric guide rail (48) is fixedly connected to the top of the box body (1), and the movable plate (23) is slidably connected to the top of the box body (1) via the electric guide rail (48).

6. The laser precision welding device for cylindrical lithium battery covers according to claim 5, characterized in that: A first hydraulic cylinder (24) is fixedly connected to the interior of the movable plate (23), and a horizontal plate (25) is fixedly connected to the bottom of the output end of the first hydraulic cylinder (24). A lifting plate (26) is provided between the movable plate (23) and the horizontal plate (25). Both sides of the lifting plate (26) are fixedly connected to vacuum pumps (27). The input ends of the two vacuum pumps (27) are fixedly connected to air pipes (28), and the bottom ends of the two air pipes (28) are fixedly connected to suction cups (29).

7. The laser precision welding device for cylindrical lithium battery covers according to claim 6, characterized in that: Both sides of the top of the lifting plate (26) are fixedly connected to limit rods (30), and the tops of the two limit rods (30) are fixedly connected to upper baffles (32). The outer sides of the two limit rods (30) are sleeved with springs (31), and the two ends of the springs (31) are fixedly connected to the upper baffles (32) and the lifting plate (26) respectively. Through holes that are compatible with the two upper baffles (32) are opened on both sides of the interior of the movable plate (23).

8. The laser precision welding device for cylindrical lithium battery covers according to claim 6, characterized in that: Both sides of the top of the transverse plate (25) are fixedly connected to the limiting rails (35), the limiting rails (35) are rotatably connected to the limiting disk (34), the bottom of the limiting disk (34) is fixedly connected to a disk (33), the disk (33) is rotatably connected to the inside of the transverse plate (25), one side of the bottom of the disk (33) is fixedly connected to a robotic arm (39), the execution end of the robotic arm (39) is equipped with a laser welding head (40), both sides of the top of the transverse plate (25) are fixedly connected to a motor (37), the output end of the motor (37) is fixedly connected to a guide gear (38), and the guide gear (38) is meshed with the ring gear (36).

9. The laser precision welding device for cylindrical lithium battery covers according to claim 1, characterized in that: Both sides of the side plate (3) are fixedly connected with a rotating shaft (41), and one side of the top of the two fixing frames (2) is fixedly connected with a supporting plate (42). The two rotating shafts (41) respectively penetrate the two supporting plates (42) and are rotatably connected to the two supporting plates (42). The rotating shaft (41) penetrates the side wall of the box body (1) and is rotatably connected to the box body (1). One side of the box body (1) is fixedly connected with a second hydraulic cylinder (44), and the output end of the second hydraulic cylinder (44) is fixedly connected with a tooth plate (45). One end of one of the rotating shafts (41) extends to the outside of the box body (1) and is fixedly connected with a transmission gear (43). The tooth plate (45) is meshed with the transmission gear (43).

10. The laser precision welding device for cylindrical lithium battery covers according to claim 6, characterized in that: Both sides of the box body (1) are fixedly connected with a material unloading rack (5), and the two material unloading racks (5) respectively correspond to the grooves on both sides of the top of the turning table (4). The box body (1) is fixedly connected with an upper conveyor (46) and a lower conveyor (47), and the lower conveyor (47) is arranged at the bottom of the upper conveyor (46). The lower conveyor (47) corresponds to the welding table (6), and the upper conveyor (46) corresponds to the lifting height of the suction cup (29).

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