Laser welding device for manufacturing large advertising board on expressway

Abstract

The invention belongs to the field of automatic welding, and particularly relates to a laser welding device for manufacturing a large highway advertising board, which comprises a robot main body, a movable arm is rotatably connected to the robot main body, a welding gun is fixedly connected to the bottom end of the movable arm, and a protective shell is fixedly connected to one side of the movable arm. Two sets of long grooves are formed in the side, away from the movable arm, of the protective shell, a through groove is formed in the bottom end of the protective shell, the size of the through groove is slightly larger than that of the industrial camera, two sets of rotating plates are rotationally connected to the through groove, and a telescopic mechanism is arranged at the top end of the industrial camera. The telescoping mechanism is used for telescoping the industrial camera, and the interior of the protective housing is provided with a turnover mechanism. And through the structural design of the telescopic mechanism, the functions of storing and protecting the industrial camera are achieved when the robot body welds the advertising metal plate, and it is guaranteed that sparks and welding slag cannot be sputtered to the industrial camera in the welding process.

Description

Technical Field

[0001] The invention relates to the field of automatic welding, in particular to a laser welding device for making large-scale billboards on expressways. Background Art

[0002] Large billboards on highways are welded together with multiple metal plates and supports. Since billboards are exposed to the wild for a long time, high requirements are placed on the welding quality of billboards. By using laser welding robots instead of manual welding, the welding quality can be guaranteed. The laser welding robot uses a visual recognition system to automatically take pictures and scan the metal plates of the billboards, thereby determining the positions where the metal plates need to be welded, and then obtaining the corresponding coordinate system to achieve automatic welding.

[0003] According to the patent document CN202410136417.4, a sheet metal automatic welding robot includes a machine tool and a robotic arm located on one side of the machine tool, a welding gun is arranged at the end of the robotic arm, two workpiece carriers and a workpiece fixing part are arranged on the top of the machine tool, the two workpiece carriers are arranged opposite to each other, and the workpiece fixing part is located at the outer periphery of the sheet metal part, so that the workpiece fixing part is located between the outer periphery of the sheet metal part to form a placement area for placing the sheet metal part. In the sheet metal automatic welding robot, the two workpiece carriers form a double-station design, so that when welding one sheet metal part, the workpiece fixing part uses the heat during the welding of the sheet metal part to fix the other sheet metal part, and there is no need to manually fix the sheet metal part. At the same time, the double-station design also improves the welding efficiency.

[0004] However, the automatic welding operation of the welding robot in the above technology needs to rely on the visual recognition system. The visual recognition system takes pictures and scans the metal plate through a camera. Since the camera needs to be installed close to the welding gun, the sparks and splashing slag generated in the process of welding the metal plate may splash onto the camera lens, resulting in unclear images obtained by the camera, affecting the welding accuracy, and the lens is easily damaged by the splashing slag during long-term use or the splashing slag adheres to the lens and affects the work of the visual recognition system; therefore, in view of the above problems, a laser welding device for the production of large billboards on highways is proposed. Summary of the invention

[0005] In order to solve the problem that the automatic welding operation of the welding robot in the above technology needs to rely on the visual recognition system, the visual recognition system takes pictures and scans the metal plate through a camera. Since the camera needs to be installed close to the welding gun, the sparks and splashing slag generated in the process of welding the metal plate may splash onto the camera lens, resulting in unclear images obtained by the camera, affecting the welding accuracy, and the lens is easily damaged by the splashing slag during long-term use or the splashing slag adheres to the lens and affects the work of the visual recognition system; therefore, in view of the above problems, a laser welding device for the production of large billboards on highways is proposed.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the laser welding device for making large highway billboards described in the present invention includes a robot body, a movable arm is rotatably connected to the robot body, a welding gun is fixedly connected to the bottom end of the movable arm, a protective shell is fixedly connected to one side of the movable arm, two groups of long grooves are provided on the side of the protective shell away from the movable arm, a through groove is provided at the bottom end of the protective shell, the size of the through groove is slightly larger than that of the industrial camera, two groups of rotating plates are rotatably connected to the through groove, a telescopic mechanism is provided at the top of the industrial camera, the telescopic mechanism is used to telescope the industrial camera, a flipping mechanism is provided inside the protective shell, the flipping mechanism is used to flip the rotating plate, and a straightening mechanism is provided on the rotating plate, the straightening mechanism is used to provide pulling force to the top of the rotating plate.

[0007] Preferably, the telescopic mechanism includes a servo motor, which is fixedly connected to the top of the protective shell, the output shaft of the servo motor is fixedly connected to the driving gear, the bottom end of the driving gear is fixedly connected to the rotating disk, the bottom end of the rotating disk is rotatably connected to two groups of first connecting rods, the first connecting rod is rotatably connected to the second connecting rod on the side away from the rotating disk, the outer side of the second connecting rod is sleeved with a fixed shell, the side of the fixed shell away from the first connecting rod is fixedly connected to the inner wall of the protective shell, the middle part of the bottom end of the second connecting rod is rotatably connected to a support rod, the bottom end of the support rod is rotatably connected to a mounting block, the mounting block is fixedly connected to the top of the industrial camera, the outer side of the industrial camera is sleeved with a fixed sleeve, two groups of support frames are fixedly connected to the fixed sleeve, the side of the support frame away from the fixed sleeve is fixedly connected to the inner wall of the protective shell, and the bottom end of the industrial camera is located directly above the through slot.

[0008] Preferably, the flipping mechanism includes two groups of movable racks, both groups of movable racks are meshed with a driving gear, and a trapezoidal block is fixedly connected to a side of the movable rack away from the driving gear, and the trapezoidal block is slidably connected to the inside of the trapezoidal groove, and the trapezoidal groove is opened on a side of the fixed plate close to the movable rack, and the top of the fixed plate is fixedly connected to the inner wall of the protective shell, and one side of the movable rack is fixedly connected to a connecting block, and the connecting block is L-shaped, and the side of the connecting block away from the movable rack is fixedly connected to the first pull rope, and the first pull rope is provided with multiple groups of guide blocks, and the guide blocks are fixedly connected to the inner wall of the protective shell, and the bottom end of the first pull rope passes through a circular hole, and the circular hole is opened at the bottom end of the protective shell, and the bottom end of the first pull rope is fixedly connected to the rotating plate, and a magnetic strip is fixedly connected to the rotating plate.

[0009] Preferably, the straightening mechanism includes a second pull rope, the bottom end of the second pull rope is fixedly connected to the top of the rotating plate, the top end of the second pull rope is fixedly connected to the bottom end of the moving block, the top end of the moving block is fixedly connected with a tension spring, the top end of the tension spring is fixedly connected to the inner wall of the top end of the fixed cylinder, the tension spring is in a stretched state, a slot is provided on the side of the bottom end of the fixed cylinder close to the second pull rope, the moving block does not contact the inner wall of the fixed cylinder, and the top and bottom ends of the fixed cylinder are respectively fixedly connected to the bottom end of the support frame and the inner wall of the protective shell.

[0010] Preferably, a card block is fixedly connected to the side of the movable block away from the second pull rope, the card block is designed to be rectangular, the card block is slidably connected to the inside of the card slot, the card slot is opened on the side of the fixed tube away from the second pull rope, the card slot is designed to be a long rectangle, and the inner wall of the card slot is in contact with the card block.

[0011] Preferably, two groups of fixing blocks are fixedly connected to the inner wall of the top end of the protective shell, and the fixing blocks are close to the driving gears, and the fixing blocks do not contact the moving rack.

[0012] Preferably, the top of the support frame is fixedly connected to a limiting block, the limiting block is rectangular in design, the bottom end of the limiting block contacts the top of the industrial camera, and the top of the industrial camera and the top of the fixed sleeve remain level.

[0013] Preferably, a plurality of groups of rotating columns are rotatably connected to the inner walls on both sides of the fixed sleeve, and the rotating columns are in contact with the outer side of the industrial camera.

[0014] Preferably, a cushion block is fixedly connected to a side of the second connecting rod away from the first connecting rod, and a U-shaped groove is formed on the fixed shell, the second connecting rod and the cushion block, and the U-shaped groove is penetrated by the first pull rope.

[0015] Preferably, two sets of protective sleeves are fixedly connected to the bottom end of the protective shell, and the protective sleeves are sleeved on the bottom end of the first pull rope.

[0016] The present invention is beneficial in that: 1. The present invention realizes the function of storing and protecting the industrial camera when the robot body welds the advertising metal plate through the structural design of the telescopic mechanism, so as to ensure that the sparks and welding slag in the welding process will not splash onto the industrial camera, and solves the problem that the automatic welding operation of the welding robot in the prior art needs to rely on the visual recognition system. The visual recognition system takes pictures and scans the metal plate through the camera. Since the camera needs to be installed close to the welding gun, the sparks and splashing welding slag generated in the process of welding the metal plate may splash onto the lens of the camera, thereby causing the image obtained by the camera to be unclear and affecting the welding accuracy. In addition, during long-term use, the lens is easily damaged by the splashing welding slag or the splashing welding slag adheres to the lens and affects the operation of the visual recognition system. Therefore, in view of the above problems, a laser welding device for making large billboards on highways is proposed.

[0017] 2. The present invention adopts the structural design of the flipping mechanism. When the industrial camera is stored, the two sets of rotating plates on the bottom end of the protective shell are flipped so that the rotating plates can close the through grooves, ensuring that the industrial camera will not be disturbed by the outside world inside the protective shell, and the two sets of rotating plates are flipped outward when the industrial camera is extended from the inside of the protective shell, ensuring that the two sets of rotating plates will not interfere with the normal movement of the industrial camera.

[0018] 3. The present invention realizes the function of keeping the first pull rope and the second pull rope in a taut state at all times during the turning process of the rotating plate through the structural design of the straightening mechanism, so that the two sets of rotating plates can be automatically closed when they are turned inward. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure inside the protective shell of the present invention; Figure 3 It is a structural schematic diagram of the bottom end of the protective housing of the present invention; Figure 4It is a schematic diagram of the connection structure of the driving gear of the present invention; Figure 5 It is a structural schematic diagram of the bottom end of the rotating disc of the present invention; Figure 6 It is a structural schematic diagram of the fixed sleeve and the industrial camera of the present invention; Figure 7 It is a structural schematic diagram of the straightening mechanism of the present invention; Figure 8 It is a schematic diagram of the connection structure of the inner wall of the protective shell of the present invention.

[0021] In the figure: 1, robot body; 20, servo motor; 21, driving gear; 22, rotating disc; 23, first connecting rod; 24, fixed shell; 25, second connecting rod; 26, U-shaped groove; 27, cushion block; 28, support rod; 29, fixed sleeve; 30, rotating column; 31, limit block; 32, support frame; 33, through groove; 34, fixed block; 35, moving rack; 36, connecting block; 37, guide block; 3 8. First pull rope; 39. Rotating plate; 40. Protective cover; 41. Second pull rope; 42. Block; 43. Slot; 44. Fixed cylinder; 45. Moving block; 46. Tension spring; 47. Long slot; 48. Protective shell; 49. Fixed plate; 50. Notch; 51. Trapezoidal slot; 52. Trapezoidal block; 53. Industrial camera; 54. Welding gun; 55. Movable arm; 56. Mounting block; 57. Round hole; 58. Magnetic strip. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0023] Embodiment 1

[0024] See also Figure 1 - Figure 8As shown, a laser welding device for making a large billboard on a highway includes a robot body 1, a movable arm 55 is rotatably connected to the robot body 1, a welding gun 54 is fixedly connected to the bottom end of the movable arm 55, a protective shell 48 is fixedly connected to one side of the movable arm 55, two groups of long grooves 47 are provided on the side of the protective shell 48 away from the movable arm 55, a through groove 33 is provided at the bottom end of the protective shell 48, the size of the through groove 33 is slightly larger than the size of the industrial camera 53, two groups of rotating plates 39 are rotatably connected to the through groove 33, a telescopic mechanism is provided at the top of the industrial camera 53, the telescopic mechanism is used to telescope the industrial camera 53, a flipping mechanism is provided inside the protective shell 48, the flipping mechanism is used to flip the rotating plate 39, and a straightening mechanism is provided on the rotating plate 39, the straightening mechanism is used to provide tension to the top of the rotating plate 39; Further, the telescopic mechanism includes a servo motor 20, the servo motor 20 is fixedly connected to the top of the protective housing 48, the output shaft of the servo motor 20 is fixedly connected to the driving gear 21, the bottom end of the driving gear 21 is fixedly connected to the rotating disk 22, the bottom end of the rotating disk 22 is rotatably connected to two groups of first connecting rods 23, the first connecting rod 23 is rotatably connected to the second connecting rod 25 on the side away from the rotating disk 22, and the outer side of the second connecting rod 25 is sleeved with a fixed shell 24, and the fixed shell 24 is away from the first connecting rod 2 One side of the second connecting rod 25 is fixedly connected to the inner wall of the protective housing 48, the middle part of the bottom end of the second connecting rod 25 is rotatably connected to the support rod 28, the bottom end of the support rod 28 is rotatably connected to the mounting block 56, the mounting block 56 is fixedly connected to the top of the industrial camera 53, the outer side of the industrial camera 53 is sleeved with a fixed sleeve 29, two groups of support frames 32 are fixedly connected to the fixed sleeve 29, the side of the support frame 32 away from the fixed sleeve 29 is fixedly connected to the inner wall of the protective housing 48, and the bottom end of the industrial camera 53 is located directly above the through slot 33; Furthermore, the flip mechanism includes two groups of moving racks 35, both of which are meshed with the driving gear 21, and the side of the moving rack 35 away from the driving gear 21 is fixedly connected with a trapezoidal block 52, and the trapezoidal block 52 is slidably connected to the inside of the trapezoidal groove 51, and the trapezoidal groove 51 is opened on the side of the fixed plate 49 close to the moving rack 35, and the top of the fixed plate 49 is fixedly connected to the inner wall of the protective shell 48, and one side of the moving rack 35 is fixedly connected with a connecting block 36, the connecting block 36 is L-shaped, and the side of the connecting block 36 away from the moving rack 35 is fixedly connected to the first pull rope 38, and the first pull rope 38 is sleeved with multiple groups of guide blocks 37, and the guide blocks 37 are fixedly connected to the inner wall of the protective shell 48. The bottom end of the first pull rope 38 passes through a circular hole 57, and the circular hole 57 is opened at the bottom end of the protective shell 48. The bottom end of the first pull rope 38 is fixedly connected to the rotating plate 39, and the rotating plate 39 is fixedly connected with a magnetic strip 58; Further, the straightening mechanism includes a second pull rope 41, the bottom end of the second pull rope 41 is fixedly connected to the top of the rotating plate 39, the top end of the second pull rope 41 is fixedly connected to the bottom end of the moving block 45, the top end of the moving block 45 is fixedly connected with a tension spring 46, the top end of the tension spring 46 is fixedly connected to the inner wall of the top end of the fixed cylinder 44, the tension spring 46 is in a tensioned state, a notch 50 is provided on one side of the bottom end of the fixed cylinder 44 close to the second pull rope 41, the moving block 45 does not contact the inner wall of the fixed cylinder 44, and the top and bottom ends of the fixed cylinder 44 are fixedly connected to the bottom end of the support frame 32 and the inner wall of the protective shell 48 respectively; Through the structural design of the telescopic mechanism, the function of storing and protecting the industrial camera is realized when the robot body is welding the advertising metal plate, so as to ensure that the sparks and welding slag in the welding process will not splash onto the industrial camera 53. When working, when the metal plate is to be photographed and scanned by the industrial camera 53, the servo motor 20 is first used to drive the driving gear 21 inside the protective housing 48 to rotate. The driving gear 21 and the rotating disk 22 are fixed on the same rotating shaft, so they will rotate synchronously with the driving gear 21. During the rotation of the rotating disk 22, the two sets of first connecting rods 23 rotatably connected at the bottom end thereof will move, and the first connecting rods 23 will move close to the rotating disk 22. One side of the moving disk 22 will make a circular motion along the bottom end of the rotating disk 22. At this time, the first connecting rod 23 will pull the second connecting rod 25 to move when it moves. The first connecting rod 23 is rotatably connected to the second connecting rod 25, and a fixed shell 24 is sleeved on the outer side of the second connecting rod 25. The fixed shell 24 will limit the moving direction of the second connecting rod 25 to ensure that the second connecting rod 25 can only move back and forth in the same direction. At this time, the two groups of second connecting rods 25 will gradually approach each other under the pull of the first connecting rod 23, and the support rod 28 rotatably connected to the bottom end of the second connecting rod 25 will push the mounting block 56 downward, and the mounting block 56 is fixed on the top of the industrial camera 53. At this time, the industrial camera 53 will move downward until the industrial camera 53 extends out from the inside of the protective shell 48, wherein a fixed sleeve 29 is provided on the outer side of the industrial camera 53, and the fixed sleeve 29 is used to ensure that the industrial camera 53 can remain stable when moving up and down to avoid deviation. The bottom of the industrial camera 53 will extend from the through slot 33. At this time, the industrial camera 53 can be used to take pictures and scan the metal parts. Similarly, when the robot body 1 is to perform welding operations on metal parts, the servo motor 20 is started to drive the rotating disk 22 to rotate in the opposite direction, and the two sets of second connecting rods 25 will move away from each other. When the second connecting rod 25 moves, it will pull the support rod 28 to The industrial camera 53 is moved upward to be accommodated in the interior of the protective shell 48, so as to protect the industrial camera 53 and prevent the industrial camera 53 from being damaged by external collision. At the same time, the protective shell 48 can also block the sparks and welding slag inserted by the robot body 1 during the welding process to ensure that the industrial camera 53 will not be affected. The size of the through groove 33 opened at the bottom of the protective shell 48 is larger than the industrial camera 53, so that the industrial camera 53 can smoothly extend through the through groove 33. Two groups of long grooves 47 are also opened on the protective shell 48, so that the connection lines on the industrial camera 53 can pass through the protective shell 48 to connect with the outside world.

[0025] Through the structural design of the flip mechanism, when the industrial camera 53 is stored, the two sets of rotating plates 39 on the bottom of the protective shell 48 are flipped so that the rotating plates 39 can close the through slots 33 to ensure that the industrial camera 53 is not disturbed by the outside world inside the protective shell 48, and when the industrial camera 53 is extended from the inside of the protective shell 48, the two sets of rotating plates 39 are flipped outward to ensure that the two sets of rotating plates 39 do not interfere with the normal movement of the industrial camera 53. The driving gear 21 will drive the industrial camera 53 to rotate during the rotation process. The two meshing moving racks 35 move, and the sliding of the trapezoidal block 52 inside the trapezoidal groove 51 enables the moving rack 35 to stably move on the fixed plate 49, so as to ensure the correct meshing of the moving rack 35 with the driving gear 21. When the rotating disk 22 rotates to make the two sets of second connecting rods 25 approach each other, the moving rack 35 will slide on the fixed plate 49, and a connecting block 36 is fixed on the moving rack 35, and one side of the connecting block 36 is connected to the first pull rope 38. The connecting block 36 will pull the first pull rope 38 to move, and the first pull rope 38 will move. The bottom end of a pull rope 38 passes through the circular hole 57 and is connected to the bottom end of the rotating plate 39, so the bottom end of the first pull rope 38 will pull the rotating plate 39, and the rotating plate 39 will rotate on the through slot 33. Under the pulling of the first pull rope 38, the rotating plate 39 will flip outward, thereby opening the through slot 33 so that the industrial camera 53 can smoothly pass through the through slot 33 and extend from the inside of the protective housing 48. Similarly, when the servo motor 20 drives the driving gear 21 to rotate in the opposite direction, the two sets of moving racks 35 move. When the moving racks 35 are reset, At this time, the through slot 33 can be closed by manually flipping the two groups of rotating plates 39. During the inward flipping of the rotating plates 39, the rotating plates 39 are fixed by the mutual attraction of the magnetic strips 58 fixed on the rotating plates 39 so that the rotating plates 39 can keep the through slot 33 closed. The two groups of rotating plates 39 do not contact each other to ensure that the rotating plates 39 do not abut each other during the flipping process. The first pull rope 38 is provided with multiple groups of guide blocks 37 to guide the first pull rope 38 when it moves inside the protective shell 48.

[0026] Through the structural design of the straightening mechanism, the function of keeping the first pull rope 38 and the second pull rope 41 in a taut state at all times during the flipping of the rotating plate 39 is achieved, so that the two sets of rotating plates 39 can be automatically closed when flipped inwardly. When the first pull rope 38 pulls the rotating plate 39 to flip it outwardly, the second pull rope 41 fixed on the top of the rotating plate 39 will pull the moving block 45, and the moving block 45 will slide inside the fixed cylinder 44, and the tension spring 46 fixed on the top of the moving block 45 will be stretched again. Since the size of the through slot 33 is larger than the industrial camera 53, when the industrial camera 53 extends from the through slot 33 into the protective shell 48, the second pull rope 41 will not affect the normal movement of the industrial camera 53. When the industrial camera 53 is stored in the protective housing 48, the second pull rope 41 connected to the top of the rotating plate 39 will always be in a taut state under the action of the tension spring 46. Therefore, under the action of the tension spring 46, the top of the rotating plate 39 can automatically flip inward so that the two groups of rotating plates 39 can automatically close the through groove 33, wherein a notch 50 is provided on the side of the fixed cylinder 44 close to the second pull rope 41 so that the second pull rope 41 can smoothly pass through the bottom end portion of the fixed cylinder 44, and the tension spring 46 is always in a stretched state to ensure that the second pull rope 41 can remain taut, and the moving block 45 does not contact the inner wall of the fixed cylinder 44 so as to reduce the friction resistance of the moving block 45 when moving.

[0027] Furthermore, a clamping block 42 is fixedly connected to the side of the moving block 45 away from the second pull rope 41. The clamping block 42 is designed in a rectangular shape. The clamping block 42 is slidably connected to the inside of the clamping slot 43. The clamping slot 43 is provided on the side of the fixed tube 44 away from the second pull rope 41. The clamping slot 43 is designed in a long rectangular shape. The inner wall of the clamping slot 43 contacts the clamping block 42. During operation, when the moving block 45 slides inside the fixed cylinder 44, the block 42 fixed on the moving block 45 will slide in the slot 43, so as to limit the maximum height of the moving block 45 moving upward inside the fixed cylinder 44 through the slot 43, to prevent the second pull rope 41 from being excessively pulled by the tension spring 46 and causing the rotating plate 39 to flip toward the inside of the protective shell 48, and the rotation angle of the rotating plate 39 is too large to abut against the bottom end of the industrial camera 53. The block 42 and the slot 43 are designed so that the two groups of rotating plates 39 can remain horizontal, and the block 42 contacts the inner wall of the slot 43 so that the moving block 45 will not shake inside the fixed cylinder 44 when the block 42 moves.

[0028] Furthermore, two groups of fixing blocks 34 are fixedly connected to the inner wall of the top of the protective shell 48, and the fixing blocks 34 are close to the driving gear 21, and the fixing blocks 34 do not contact the moving rack 35; During operation, when the movable rack 35 moves to drive the connecting block 36 to approach the driving gear 21, in order to prevent the connecting block 36 from abutting against the driving gear 21, two sets of fixed blocks 34 are arranged near the driving gear 21 to block the connecting block 36 and limit the moving distance of the movable rack 35.

[0029] Furthermore, the top of the support frame 32 is fixedly connected to a limit block 31, the limit block 31 is rectangular in design, the bottom end of the limit block 31 contacts the top of the industrial camera 53, and the top of the industrial camera 53 and the top of the fixed sleeve 29 are kept horizontal; During operation, the limit block 31 is fixed on the top of the support frame 32 and contacts the top of the industrial camera 53 to ensure that the industrial camera 53 can move back to its original position when it is stored in the protective housing 48 .

[0030] Furthermore, multiple groups of rotating columns 30 are rotatably connected to the inner walls on both sides of the fixed sleeve 29, and the rotating columns 30 are in contact with the outer side of the industrial camera 53; During operation, through the design of the rotating column 30, when the industrial camera 53 moves inside the fixed sleeve 29, the sliding friction between the inner wall of the fixed sleeve 29 and the outer side of the industrial camera 53 can be converted into rolling friction, thereby reducing the friction resistance between the industrial camera 53 and the inner wall of the fixed sleeve 29, and reducing the wear of the industrial camera 53 when moving.

[0031] Embodiment 2

[0032] See also Figure 3 - Figure 5 As shown, comparative example 1 is another embodiment of the present invention, a cushion block 27 is fixedly connected to a side of the second connecting rod 25 away from the first connecting rod 23, and a U-shaped groove 26 is formed on the fixed shell 24, the second connecting rod 25 and the cushion block 27, and the U-shaped groove 26 is penetrated by a first pull rope 38; During operation, the cushion block 27 is made of rubber material to provide a buffer between the second connecting rod 25 and the inner wall of the protective shell 48 to avoid direct contact between the second connecting rod 25 and the inner wall of the protective shell 48, and a U-shaped groove 26 is provided on the fixed shell 24, the second connecting rod 25 and the cushion block 27. The design of the U-shaped groove 26 ensures that the first pull rope 38 can pass through smoothly to avoid affecting the movement of the first pull rope 38.

[0033] The bottom end of the protective shell 48 is fixedly connected with two sets of protective sleeves 40, and the protective sleeves 40 are sleeved on the bottom end of the first pull rope 38; During operation, the protective sleeve 40 is fixed to the bottom end of the protective shell 48 to protect the bottom end portion of the first pull rope 38 .

[0034] The above shows and describes 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, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A laser welding device for making large billboards on highways, comprising a robot body (1), a movable arm (55) rotatably connected to the robot body (1), a welding gun (54) fixedly connected to the bottom end of the movable arm (55), characterized in that: A protective shell (48) is fixedly connected to one side of the movable arm (55); two groups of long grooves (47) are provided on a side of the protective shell (48) away from the movable arm (55); a through slot (33) is provided at the bottom end of the protective shell (48); the size of the through slot (33) is slightly larger than the size of the industrial camera (53); two groups of rotating plates (39) are rotatably connected to the through slot (33); a telescopic mechanism is provided at the top of the industrial camera (53); the telescopic mechanism is used to telescope the industrial camera (53); a flipping mechanism is provided inside the protective shell (48); the flipping mechanism is used to flip the rotating plate (39); a straightening mechanism is provided on the rotating plate (39); the straightening mechanism is used to provide a pulling force to the top of the rotating plate (39).

2. The laser welding device for making large billboards on highways according to claim 1 is characterized in that: The telescopic mechanism comprises a servo motor (20), the servo motor (20) is fixedly connected to the top of the protective housing (48), the output shaft of the servo motor (20) is fixedly connected to a driving gear (21), the bottom end of the driving gear (21) is fixedly connected to a rotating disk (22), the bottom end of the rotating disk (22) is rotatably connected to two groups of first connecting rods (23), the first connecting rod (23) is rotatably connected to a second connecting rod (25) on a side away from the rotating disk (22), the second connecting rod (25) is sleeved with a fixed shell (24) on the outside, and the fixed shell (24) is away from the first connecting rod (23). One side is fixedly connected to the inner wall of the protective shell (48); the middle part of the bottom end of the second connecting rod (25) is rotatably connected to a support rod (28); the bottom end of the support rod (28) is rotatably connected to a mounting block (56); the mounting block (56) is fixedly connected to the top of the industrial camera (53); a fixed sleeve (29) is sleeved on the outer side of the industrial camera (53); two groups of support frames (32) are fixedly connected to the fixed sleeve (29); the side of the support frame (32) away from the fixed sleeve (29) is fixedly connected to the inner wall of the protective shell (48); the bottom end of the industrial camera (53) is located directly above the through groove (33).

3. The laser welding device for making large billboards on highways according to claim 1 is characterized in that: The flip mechanism comprises two groups of movable racks (35), both of which are meshed with the driving gear (21), a trapezoidal block (52) is fixedly connected to the side of the movable rack (35) away from the driving gear (21), the trapezoidal block (52) is slidably connected to the inside of the trapezoidal groove (51), the trapezoidal groove (51) is opened on the side of the fixed plate (49) close to the movable rack (35), the top end of the fixed plate (49) is fixedly connected to the inner wall of the protective shell (48), and a connecting block (36) is fixedly connected to one side of the movable rack (35). The connecting block (36) is designed to be L-shaped. The side of the connecting block (36) away from the movable rack (35) is fixedly connected to the first pull rope (38). The first pull rope (38) is sleeved with a plurality of guide blocks (37). The guide blocks (37) are fixedly connected to the inner wall of the protective shell (48). The bottom end of the first pull rope (38) passes through a circular hole (57). The circular hole (57) is provided at the bottom end of the protective shell (48). The bottom end of the first pull rope (38) is fixedly connected to the rotating plate (39). The rotating plate (39) is fixedly connected with a magnetic strip (58).

4. The laser welding device for making large billboards on highways according to claim 1 is characterized in that: The straightening mechanism comprises a second pull rope (41), the bottom end of the second pull rope (41) is fixedly connected to the top end of the rotating plate (39), the top end of the second pull rope (41) is fixedly connected to the bottom end of the moving block (45), the top end of the moving block (45) is fixedly connected to a tension spring (46), the top end of the tension spring (46) is fixedly connected to the inner wall of the top end of the fixed cylinder (44), the tension spring (46) is in a tensioned state, a notch (50) is provided on a side of the bottom end of the fixed cylinder (44) close to the second pull rope (41), the moving block (45) does not contact the inner wall of the fixed cylinder (44), and the top and bottom ends of the fixed cylinder (44) are fixedly connected to the bottom end of the support frame (32) and the inner wall of the protective shell (48) respectively.

5. The laser welding device for making large billboards on highways according to claim 4 is characterized in that: A clamping block (42) is fixedly connected to a side of the moving block (45) away from the second pull rope (41); the clamping block (42) is rectangular in design; the clamping block (42) is slidably connected to the inside of a clamping slot (43); the clamping slot (43) is provided on a side of the fixed cylinder (44) away from the second pull rope (41); the clamping slot (43) is long and rectangular in design; the inner wall of the clamping slot (43) is in contact with the clamping block (42).

6. The laser welding device for making large billboards on highways according to claim 3 is characterized by: Two groups of fixed blocks (34) are fixedly connected to the inner wall at the top of the protective shell (48), the fixed blocks (34) are close to the driving gear (21), and the fixed blocks (34) do not contact the moving rack (35).

7. The laser welding device for making large billboards on highways according to claim 4 is characterized in that: The top end of the support frame (32) is fixedly connected to a limit block (31), the limit block (31) is rectangular in design, the bottom end of the limit block (31) contacts the top end of the industrial camera (53), and the top end of the industrial camera (53) and the top end of the fixed sleeve (29) are kept horizontal.

8. The laser welding device for making large billboards on highways according to claim 7 is characterized in that: Multiple groups of rotating columns (30) are rotatably connected to the inner walls on both sides of the fixed sleeve (29), and the rotating columns (30) are in contact with the outer side of the industrial camera (53).

9. The laser welding device for making large billboards on highways according to claim 2 is characterized in that: A cushion block (27) is fixedly connected to a side of the second connecting rod (25) away from the first connecting rod (23); a U-shaped groove (26) is formed on the fixed shell (24), the second connecting rod (25) and the cushion block (27); and a first pull rope (38) penetrates the U-shaped groove (26).

10. The laser welding device for making large billboards on highways according to claim 9 is characterized in that: Two sets of protective sleeves (40) are fixedly connected to the bottom end of the protective shell (48), and the protective sleeves (40) are sleeved on the bottom end of the first pull rope (38).

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