Laser welding device of air cooling box type unit

Abstract

The invention discloses a laser welding device of an air cooling box type unit, and belongs to the field of laser welding, the laser welding device comprises an air cooling unit and a transmission mechanism, the air cooling unit comprises a box body, a through bottom groove is formed in the lower part of the outer surface of the box body, a separation frame is fixed in the box body, and laser welding equipment is fixed in the middle of the separation frame in a penetrating manner; a laser head at the bottom of the laser welding equipment is positioned below the separation frame; through the design of the rotating rings and the through grooves in the partition frame, when a machined part enters the box body, the rotating second through groove and the first through groove are transiently communicated in an overlapped mode, air can be made to blow the machined part or dust and sundries on the surface of the machined part are sucked and discharged through operation of the draught fan, and the influence of dust and the like on follow-up machining is reduced; and during laser welding operation, the first through groove and the second through groove are staggered and not communicated, the machined part is located in a closed space, interference of factors such as gas flow on welding is reduced, the cleanliness of the welding environment is effectively guaranteed, and the welding quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and more particularly to a laser welding device for an air-cooled box-type unit. Background Art

[0002] Under the background that current laser welding technology is widely used in many industrial fields such as electronics, machinery, and automobiles, the following problems are exposed by traditional laser welding devices: Insufficient guarantee of welding environment: During the welding process of electronic chips, tiny dust particles on the surface of the workpiece may cause problems such as virtual soldering and short circuits at the solder joints, seriously affecting the product performance and quality. However, traditional devices lack effective pre-treatment and cleaning mechanisms and cannot thoroughly clean the impurities on the surface of the workpiece before welding. At the same time, it is difficult to create a stable sealed environment during welding, and gas flow interferes with the laser welding process, resulting in unstable welding quality, a high rejection rate, and it is difficult to meet the strict requirements for welding quality in high-end manufacturing.

[0003] High equipment maintenance cost: During continuous high-intensity industrial production, if a large amount of heat generated by laser welding equipment cannot be dissipated in time, it will lead to a decline in equipment performance and shorten the service life of the equipment. Traditional heat dissipation methods are inefficient, or require complex and expensive cooling systems, increasing equipment costs and operating costs. In addition, the dust generated during the welding process will adhere to components such as filters. Traditional devices rely on manual cleaning at regular intervals, which not only consumes a large amount of manpower and material resources, but also easily affects equipment heat dissipation due to untimely cleaning, leading to equipment failures, reducing production efficiency, and increasing the operating costs of enterprises.

[0004] Therefore, a laser welding device for an air-cooled box-type unit is needed to solve the above-mentioned problems. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a laser welding device for an air-cooled box-type unit, which solves the problems raised in the above background art.

[0006] Technical solution: To solve the above technical problems, according to one aspect of the present invention, more specifically, a laser welding device for an air-cooled box-type unit includes an air-cooled unit and a transmission mechanism. The air-cooled unit includes a box body. A through bottom groove is opened below the outer surface of the box body. A partition frame is fixed inside the box body. A laser welding device is fixedly penetrated through the middle of the partition frame. The laser head at the bottom of the laser welding device is located below the partition frame. A ring groove is opened on the upper surface of the partition frame. A plurality of through slots one are opened on the lower surface inside the ring groove. A rotating ring is rotatably connected inside the ring groove. A plurality of through slots two are penetrated and opened inside the rotating ring; The air-cooled unit further includes an air duct, which is fixedly penetrated through the top of the box body. Above the interior of the air duct, a first filter screen is fixedly installed. The front and rear surfaces of the box body are both fixedly penetrated with air inlets, and a second filter screen is fixedly installed inside the air inlets. Two brackets are fixedly installed on the right side of the box body. A rotating shaft is rotatably connected inside the brackets. On the opposite ends of the two rotating shafts, a first helical gear is fixedly installed respectively. On the opposite ends of the two rotating shafts facing away from each other, a first spur gear is fixedly installed respectively. The front and rear surfaces of the box body are both fixedly installed with sliding frames. A sliding rod is slidably connected inside the sliding frames. A toothed plate is fixedly installed on the right end of the sliding rod. A third helical gear is rotatably connected to the right side of the box body. At the center of the right side of the third helical gear, a second helical gear is fixedly installed. A fourth helical gear is rotatably connected to the upper right surface of the box body. The fourth helical gear is meshed and connected with the third helical gear. A swing rod is fixedly installed on the upper surface of the fourth helical gear. At the center of the lower surface of the fourth helical gear, a rotating rod is fixedly installed. The bottom end of the rotating rod penetrates into the interior of the box body and is fixedly installed with a rotating wheel, which is rotatably connected with the partition frame. A blower is installed below the interior of the air duct.

[0007] Furthermore, the transmission mechanism includes a turntable. The left side of the turntable is located inside the bottom groove and the box body. At the center of the upper surface of the turntable, a shaft rod is fixedly installed. Above the outer surface of the shaft rod, two incomplete gears are fixedly installed. Two material grooves are opened on the upper surface of the turntable. Side grooves are symmetrically opened inside the material grooves. Electric slide rails are installed inside the two side grooves. An expansion rod is slidably connected to the outer surface of the electric slide rail. On the opposite ends of the two expansion rods, a clamping seat is fixedly installed respectively. A workpiece is clamped between the two clamping seats. A motor is fixedly installed at the bottom of the transmission mechanism.

[0008] Furthermore, the toothed plate is meshed and connected with the adjacent first spur gear.

[0009] Furthermore, the outer surface of the rotating wheel is in transmission connection with the outer surface of the rotating ring.

[0010] Furthermore, rubber strips are fixedly installed on the opposite sides of the two sliding rods. The sliding rods are attached to the outer surface of the second filter screen through the rubber strips. A pneumatic rod is slidably connected to the lower part of the toothed plate. The bottom of the pneumatic rod is fixedly connected to the outer surface of the box body. An air inlet valve is installed at the top of the toothed plate. A number of swing wheels are embedded at the upper and lower corners on the side of the sliding rod close to the second filter screen. Nozzles are penetrated inside the swing wheels. A worm gear is coaxially fixedly installed on the swing wheel. The swing wheel and the worm gear are both rotatably connected to the sliding rod. Two worm shafts are rotatably connected inside the sliding rod. The worm gear is meshed and connected with the adjacent worm shaft. The left ends of the two worm shafts both penetrate to the left side of the sliding rod and are both fixedly installed with transmission wheels. The outer surfaces of the two transmission wheels are both attached to the outer surface of the air inlet.

[0011] Furthermore, the two incomplete gears are arranged vertically and horizontally in a staggered manner. The incomplete gears are respectively meshed and connected with the second helical gear and the first helical gear.

[0012] Furthermore, the second through slot is adapted to the first through slot.

[0013] Furthermore, a glass window is fixedly penetrated through the left side of the box.

[0014] The beneficial effects of the laser welding device of an air-cooled box-type unit of the present invention are: (1) The present invention uses the coordinated design of the rotating ring and the through groove on the partition frame to effectively clean the dust and debris on the surface of the workpiece when it enters the box, create a stable and closed space during welding, greatly reduce the probability of welding defects, and improve the welding quality; in the fields of precision electronic equipment manufacturing, high-end mechanical parts processing, etc., which have extremely high requirements for welding quality, it can ensure the high precision and high reliability of the product and meet the industry's growing demand for high-quality production.

[0015] (2) The present invention realizes automatic cleaning of filter screen 1 and filter screen 2 by driving the transmission mechanism with a motor, thereby reducing the workload and cost of manual maintenance. At the same time, the fan cools the laser welding equipment with air, ensuring the stability of the equipment during long-term operation and extending the service life of the equipment. It can reduce the downtime of equipment maintenance, improve production efficiency, and increase the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic cross-sectional view of the structure of the present invention; Figure 3 It is a structural schematic diagram of the air cooling unit in the present invention; Figure 4 It is a schematic diagram of the internal structure of the air-cooling unit in the present invention; Figure 5 It is a structural schematic diagram of the partition frame and the rotating ring in the present invention; Figure 6 It is a structural schematic diagram of the partition frame in the present invention; Figure 7 It is a structural schematic diagram of the spur gear 1 and the transmission mechanism in the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the left view structure; Figure 9 It is a structural schematic diagram of the air outlet and the tooth plate in the present invention; Figure 10 It is a schematic diagram of the top cross-sectional structure of the rubber strip and the tooth plate in the present invention; Figure 11This is a schematic side-sectional structure diagram of the sliding rod and the rubber strip in the present invention.

[0018] In the figure: 1, air-cooled unit; 11, box body; 12, bottom groove; 13, partition rack; 14, laser welding equipment; 15, annular groove; 16, first through groove; 17, rotating ring; 18, second through groove; 19, air duct; 110, first filter screen; 111, air outlet; 112, second filter screen; 113, support; 114, rotating shaft; 115, first helical gear; 116, first spur gear; 117, sliding frame; 118, sliding rod; 119, toothed plate; 120, second helical gear; 121, third helical gear; 122, fourth helical gear; 123, swing rod; 124, rotating rod; 125, rotating wheel; 126, fan; 2, transmission mechanism; 21, turntable; 22, shaft rod; 23, incomplete gear; 24, material trough; 25, side groove; 26, electric slide rail; 27, telescopic rod; 28, clamping seat; 3, motor; 4, glass window; 5, workpiece; 6, rubber strip; 61, pneumatic rod; 62, intake valve; 63, swing wheel; 64, nozzle; 65, worm gear; 66, worm; 67, transmission wheel. Detailed implementation manners

[0019] In the following, the present invention will be described in detail with reference to the drawings and in combination with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0020] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0021] Refer to Figures 1-11 , a laser welding device for an air-cooled box-type unit, including an air-cooled unit 1 and a transmission mechanism 2. The air-cooled unit 1 includes a box body 11. A through bottom groove 12 is opened below the outer surface of the box body 11. A partition rack 13 is fixed inside the box body 11. The box body 11 is divided into upper and lower isolation spaces by the partition rack 13. The lower part is a stable processing space, and the upper part is an air-cooling space for air flow to cool the equipment. A laser welding equipment 14 is fixedly penetrated through the middle of the partition rack 13. The laser head at the bottom of the laser welding equipment 14 is located below the partition rack 13. An annular groove 15 is opened on the upper surface of the partition rack 13. A plurality of through first through grooves 16 are opened on the lower surface inside the annular groove 15. A rotating ring 17 is rotatably connected inside the annular groove 15. A plurality of through second through grooves 18 are penetrated inside the rotating ring 17. The second through grooves 18 are adapted to the first through grooves 16; The air-cooled unit 1 further includes an air duct 19, which is fixedly penetrated through the top of the box body 11. Above the inside of the air duct 19, a first filter screen 110 is fixed. On the front and rear surfaces of the box body 11, air inlets 111 are fixedly penetrated. Inside the air inlets 111, a second filter screen 112 is fixed. On the right side of the box body 11, two brackets 113 are fixed. Inside the brackets 113, a rotating shaft 114 is rotatably connected. On the opposite ends of the two rotating shafts 114, a first helical gear 115 is fixed. On the opposite ends of the two rotating shafts 114, a first spur gear 116 is fixed. On the front and rear surfaces of the box body 11, sliding frames 117 are fixed. Inside the sliding frames 117, sliding rods 118 are slidably connected. On the right end of the sliding rod 118, a toothed plate 119 is fixed. The toothed plate 119 is meshed and connected with the adjacent first spur gear 116. On the right side of the box body 11, a third helical gear 121 is rotatably connected. At the center of the right side of the third helical gear 121, a second helical gear 120 is fixed. On the upper right surface of the box body 11, a fourth helical gear 122 is rotatably connected. The fourth helical gear 122 is meshed and connected with the third helical gear 121. On the upper surface of the fourth helical gear 122, a swing rod 123 is fixed. At the center of the lower surface of the fourth helical gear 122, a rotating rod 124 is fixed. The bottom end of the rotating rod 124 penetrates into the inside of the box body 11 and is fixed with a runner 125. The outer surface of the runner 125 is in transmission connection with the outer surface of the rotating ring 17. The runner 125 is rotatably connected with the partition frame 13. Below the inside of the air duct 19, a blower 126 is arranged. When the runner 125 rotates with the transmission mechanism 2, the rotating ring 17 rotates, briefly connecting the upper and lower spaces inside the box body 11, and quickly discharging the dust and sundries brought in by the operation of the transmission mechanism 2 when the blower 126 is running; The transmission mechanism 2 includes a turntable 21. The left side of the turntable 21 is located inside the bottom groove 12 and the box body 11. At the center of the upper surface of the turntable 21, a shaft rod 22 is fixed. Above the outer surface of the shaft rod 22, two incomplete gears 23 are fixed. On the upper surface of the turntable 21, two material grooves 24 are opened. Inside the material grooves 24, side grooves 25 are symmetrically opened. Inside the two side grooves 25, electric slide rails 26 are arranged. On the outer surface of the electric slide rails 26, telescopic rods 27 are slidably connected. On the opposite ends of the two telescopic rods 27, clamping seats 28 are fixed. Between the two clamping seats 28, a workpiece 5 is jointly clamped. The workpiece 5 includes but is not limited to chip materials. At the bottom of the transmission mechanism 2, a motor 3 is fixed; During use, the fan 126 operates to blow air into the box body 11 or exhaust the air inside the box body. At the same time, the transmission mechanism 2 is driven by the motor 3 to enable the workpiece 5 to enter the interior of the box body 11. When the turntable 21 rotates, the shaft rod 22 rotates to drive the two incomplete gears 23 to rotate. Under the transmission of the second helical gear 120, the third helical gear 121, the rotating rod 124, and the rotating wheel 125, the rotating ring 17 rotates. At this time, the rotating through slot two 18 overlaps with the through slot one 16, so that the spaces separated by the partition frame 13 up and down are connected. The air flowing due to the operation of the fan 126 can blow the workpiece 5 below or suck and discharge the dust and sundries on the surface of the workpiece 5, avoiding the influence of dust and other sundries on subsequent processing. When the rotation stops, the through slot one 16 and the through slot two 18 are staggered and no longer connected, so that the workpiece 5 below is in a sealed space, reducing the influence of factors such as gas flow on laser welding. The laser welding device 14 operates to perform welding operations on the surface of the workpiece 5, and the electric slide rail 26 and the telescopic rod 27 are used to move the workpiece 5 for welding processing. At the same time, the operating fan 126 cools the main body part of the laser welding device 14, the part located above the partition frame 13 by air cooling; the cold air flows out or enters through the air outlet 111 and the air duct 19, and under the filtration of the filter screen, dust and sundries are prevented from entering the interior of the box body 11; after processing the workpiece 5, the shaft rod 22 driven by the motor 3 and the two incomplete gears 23 alternately engage with the first helical gear 115, so that under the reciprocating rotation of the rotating shaft 114 and the first spur gear 116, the toothed plate 119 and the sliding rod 118 move up and down reciprocally to clean the surface of the second filter screen 112. At the same time, under the transmission of the two incomplete gears 23, the second helical gear 120 and the third helical gear 121 drive the swing rod 123 to swing reciprocally to clean the first filter screen 110, reducing the cleaning burden of personnel.

[0022] Preferably, rubber strips 6 are fixed on the opposite sides of the two sliding rods 118, and the sliding rods 118 are attached to the outer surface of the second filter screen 112 through the rubber strips 6; a pneumatic rod 61 is slidably connected to the lower part inside the toothed plate 119, and the bottom of the pneumatic rod 61 is fixedly connected to the outer surface of the box body 11. An air inlet valve 62 is arranged at the top of the toothed plate 119, and the air inlet valve 62 is a one-way valve. When the toothed plate 119 moves upward, the interior of the toothed plate 119 is in negative pressure and air enters through the air inlet valve 62. A plurality of swing wheels 63 are embedded at the upper and lower corners on the side of the sliding rod 118 close to the second filter screen 112. A nozzle 64 is arranged inside the swing wheel 63. A worm gear 65 is coaxially fixed to the swing wheel 63. The swing wheel 63 and the worm gear 65 are both rotatably connected to the sliding rod 118. Two worm shafts 66 are rotatably connected inside the sliding rod 118. The worm gear 65 is meshed with the adjacent worm shaft 66. The left ends of the two worm shafts 66 both penetrate to the left side of the sliding rod 118 and are both fixed with transmission wheels 67. The outer surfaces of the two transmission wheels 67 are both attached to the outer surface of the air outlet 111; When the toothed plate 119 and the sliding rod 118 move up and down reciprocally to clean the surface of the second filter screen 112, the air inside the moving up and down toothed plate 119 is relatively extruded by the fixed pneumatic rod 61 and sprayed onto the surface of the second filter screen 112 through the nozzle 64. At the same time, the two transmission wheels 67 are driven by friction to axially drive the grip rod 66 to rotate, so that the pendulum wheel 63 and the nozzle 64 swing left and right under the transmission of the worm gear 65, thereby making the cleaning range of the jet air flow larger and improving the cleaning effect of the filter screen.

[0023] Preferably, the two incomplete gears 23 are arranged vertically staggered. The incomplete gears 23 are respectively meshed with the second helical gear 120 and the first helical gear 115. The two incomplete gears 23 can only be meshed with a single first helical gear 115 at the same time, and the second helical gear 120 can only be meshed with a single incomplete gear 23 at the same time, so that the second helical gear 120 and the first helical gear 115 form a reciprocating rotation when the shaft rod 114 rotates in a stable direction.

[0024] Preferably, a glass window 4 is fixedly penetrated through the left side of the box body 11, and the processing progress can be conveniently observed through the glass window.

[0025] Working principle: Pretreatment of workpieces and environmental cleaning: When the motor 3 starts, the transmission mechanism 2 starts to operate, and the turntable 21 rotates accordingly, driving the shaft rod 22 and the two incomplete gears 23 fixed thereon to rotate. Under the transmission of the second helical gear 120, the third helical gear 121, the rotating rod 124 and the rotating wheel 125, the rotating ring 17 rotates synchronously. At this time, the second through groove 18 on the rotating ring 17 overlaps and communicates with the first through groove 16 on the partition frame 13 briefly. The blower 126 operates continuously, and the generated air flow blows the surface of the workpiece 5 quickly, or attracts and discharges dust and sundries. This process is remarkable in the field of electronic chip manufacturing, which can effectively remove the tiny particles on the surface of the chip generated during transportation and storage, avoid these impurities from mixing into the weld seam during welding to form defects such as pores and inclusions, greatly improve the welding quality, and ensure the reliability of the product.

[0026] Stable guarantee for the welding environment: When the workpiece 5 reaches the specified welding position, the turntable 21 stops rotating, and the rotating ring 17 also stops accordingly. The first through groove 16 and the second through groove 18 are staggered and not communicated, and the workpiece 5 is enclosed in a relatively stable space. In the field of laser welding, gas flow will interfere with the propagation path and energy distribution of the laser beam, resulting in uneven heat during welding and affecting the welding effect. Through this design of the closed space, the interference of gas flow on welding is effectively reduced, creating a stable working environment for the laser welding equipment 14, ensuring the stability of the welding process, and thus improving the welding quality.

[0027] Welding Process and Workpiece Adjustment: The laser welding equipment 14 is started to perform welding operations on the workpiece 5. During the welding process, the electric slide rail 26 and the telescopic rod 27 work together, and according to the pre-set program or the welding conditions monitored in real time, the position and posture of the workpiece 5 are precisely adjusted. In the field of mechanical manufacturing, for the welding of complex-shaped parts, this flexible adjustment method of this device can ensure the accuracy of the welding position, improve the welding precision, make the weld seam more uniform and beautiful, and enhance the structural strength and stability of the product.

[0028] Equipment Heat Dissipation and Filter Cleaning: During the continuous operation of the fan 126, it not only pre-treats and cleans the workpiece 5, but also cools the main body of the laser welding equipment 14 located above the partition 13 by air cooling. Through the air duct 19 and the air outlet 111, cold air enters the box body 11, takes away the heat generated by the operation of the equipment, and is discharged after being filtered by the first filter 110 and the second filter 112. During the long-term operation of the equipment, dust will gradually adhere to the filters, affecting the ventilation and heat dissipation effect. When the transmission mechanism 2 conveys and outputs the workpiece 5, the motor 3 drives the shaft rod 22 to rotate, and the two incomplete gears 23 alternately mesh with the first helical gear 115. Driven by the rotating shaft 114 and the first spur gear 116, the toothed plate 119 drives the slide rod 118 to reciprocate up and down to clean the dust on the surface of the second filter 112, and the air inside the toothed plate 119 that moves up and down is relatively squeezed by the fixed pneumatic rod 61 and sprayed onto the surface of the second filter 112 through the nozzle 64. At the same time, the two transmission wheels 67 are axially driven to rotate the grip rod 66 by friction, so that the swing wheel 63 and the nozzle 64 swing left and right under the drive of the worm gear 65, thereby making the cleaning range of the jet air flow larger and improving the cleaning effect of the filter; at the same time, the incomplete gear 23 drives the swing rod 123 to reciprocate through the transmission of the second helical gear 120 and the third helical gear 121 to clean the first filter 110. This automatic cleaning mechanism reduces the frequency of manual cleaning, reduces labor costs, avoids poor heat dissipation of the equipment caused by untimely cleaning, extends the service life of the equipment, and improves production efficiency.

[0029] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

1. A laser welding device for an air-cooled box-type unit, comprising an air-cooled unit (1) and a transmission mechanism (2), characterized in that: The air-cooled unit (1) includes a box body (11). A through bottom groove (12) is formed in the lower part of the outer surface of the box body (11). A partition shelf (13) is fixed inside the box body (11). A laser welding device (14) is fixedly penetrated through the middle of the partition shelf (13). The laser head at the bottom of the laser welding device (14) is located below the partition shelf (13). An annular groove (15) is formed in the upper surface of the partition shelf (13). A plurality of through first through grooves (16) are formed in the lower surface of the annular groove (15). A rotating ring (17) is rotatably connected inside the annular groove (15). A plurality of through second through grooves (18) are formed through the inside of the rotating ring (17). The transmission mechanism (2) includes a turntable (21). The left side of the turntable (21) is located inside the bottom groove (12) and the box body (11). A shaft rod (22) is fixed at the center of the upper surface of the turntable (21). Two incomplete gears (23) are fixed above the outer surface of the shaft rod (22). Two material grooves (24) are formed in the upper surface of the turntable (21). Side grooves (25) are symmetrically formed inside the material grooves (24). Electric slide rails (26) are arranged inside the two side grooves (25). Expansion rods (27) are slidably connected to the outer surfaces of the electric slide rails (26). Clamping seats (28) are fixed to the opposite ends of the two expansion rods (27). A workpiece (5) is jointly clamped between the two clamping seats (28). A motor (3) is fixed to the bottom of the transmission mechanism (2).

2. The laser welding device for an air-cooled box-type unit according to claim 1, characterized in that: The air-cooled unit (1) further includes an air duct (19), the air duct (19) is fixedly penetrated through the top of the box body (11), a first filter screen (110) is fixedly arranged above the inside of the air duct (19), air inlets (111) are fixedly penetrated through the front and rear surfaces of the box body (11), a second filter screen (112) is fixedly arranged inside the air inlets (111), two supports (113) are fixedly arranged on the right side of the box body (11), a rotating shaft (114) is rotatably connected inside the supports (113), a first helical gear (115) is fixedly arranged at the opposite ends of the two rotating shafts (114), a first spur gear (116) is fixedly arranged at the opposite ends of the two rotating shafts (114), sliding frames (117) are fixedly arranged on the front and rear surfaces of the box body (11), a sliding rod (118) is slidably connected inside the sliding frames (117), a rack (119) is fixedly arranged at the right end of the sliding rod (118), a third helical gear (121) is rotatably connected to the right side of the box body (11), a second helical gear (120) is fixedly arranged at the center of the right side of the third helical gear (121), a fourth helical gear (122) is rotatably connected to the upper right side of the upper surface of the box body (11), the fourth helical gear (122) is meshed and connected with the third helical gear (121), a swing rod (123) is fixedly arranged on the upper surface of the fourth helical gear (122), a rotating rod (124) is fixedly arranged at the center of the lower surface of the fourth helical gear (122), the bottom end of the rotating rod (124) penetrates into the box body (11) and is fixedly provided with a rotating wheel (125), the rotating wheel (125) is rotatably connected with the partition frame (13), and a blower (126) is arranged below the inside of the air duct (19).

3. The laser welding device for an air-cooled box-type unit according to claim 2, characterized in that: The rack (119) is meshed and connected with the adjacent first spur gear (116).

4. The laser welding device for an air-cooled box-type unit according to claim 2, wherein: The outer surface of the rotating wheel (125) is in transmission connection with the outer surface of the rotating ring (17).

5. The laser welding device for an air-cooled box-type unit according to claim 2, characterized in that: Rubber strips (6) are fixedly arranged on the opposite sides of the two sliding rods (118), and the sliding rods (118) are attached to the outer surface of the second filter screen (112) through the rubber strips (6); a pneumatic rod (61) is slidably connected to the lower part inside the rack (119), the bottom of the pneumatic rod (61) is fixedly connected with the outer surface of the box body (11), an air inlet valve (62) is arranged at the top of the rack (119), a plurality of swing wheels (63) are embedded at the upper and lower corners of the side of the sliding rod (118) close to the second filter screen (112), nozzles (64) are arranged inside the swing wheels (63), worm wheels (65) are coaxially fixedly arranged on the swing wheels (63), the swing wheels (63) and the worm wheels (65) are rotatably connected with the sliding rods (118), two worm shafts (66) are rotatably connected inside the sliding rods (118), the worm wheels (65) are meshed and connected with the adjacent worm shafts (66), the left ends of the two worm shafts (66) penetrate to the left side of the sliding rods (118) and are fixedly provided with transmission wheels (67), and the outer surfaces of the two transmission wheels (67) are attached to the outer surface of the air inlet (111).

6. The laser welding device for an air-cooled box-type unit according to claim 2, characterized in that: The two incomplete gears (23) are arranged in a staggered manner up and down, and the incomplete gears (23) are respectively meshed and connected with the second helical gear (120) and the first helical gear (115).

7. The laser welding device for an air-cooled box-type unit according to claim 1, characterized in that: The second through groove (18) is adapted to the first through groove (16).

8. The laser welding device of an air-cooled box-type unit according to claim 1, characterized in that: A glass window (4) is fixedly penetrated through the left side of the box body (11).

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