A welding galvanometer

Abstract

This application discloses a welding galvanometer in the field of laser welding equipment technology, including an integrated motor support assembly, plate assembly, and optical structure. The integrated motor support assembly includes an integrated motor bracket, a drive board, a motor mounting base, and a galvanometer motor assembly. The integrated motor bracket is a hollow cube with a field lens conversion seat hole on the bottom surface and galvanometer motor holes, optical path holes, and one-way vent valves on other surfaces. A lens temperature probe and a cooling nozzle are also installed on the integrated motor bracket. A water channel and a gas channel are respectively arranged inside the integrated motor bracket, and the cooling nozzle is connected to the gas channel. This invention solves the problems of bulky structure, difficult processing, and poor precision, performance, reliability, and heat dissipation in the prior art, achieving the beneficial effects of effectively improving precision, simplifying product structure, reducing weight, volume, and temperature, and improving product reliability and lifespan.

Description

Technical Field

[0001] This invention relates to the field of laser welding equipment technology, specifically a high-power welding galvanometer. Background Technology

[0002] Currently, high-power welding galvanometers can be broadly classified into two structural types: the first type is as follows... Figure 1a One method involves directly machining the galvanometer cavity from a single block of material, assembling the galvanometer motor into the cavity, and then completing the assembly using upper and lower cover shells formed by upper support 31 and lower support 32. The disadvantage of this structure is that it is too bulky and difficult to manufacture. A second structure is as follows... Figure 1b The galvanometer is assembled by mounting the galvanometer motor onto the clamping block structure 43. After the galvanometer assembly is completed by assembling the clamping block, it is assembled with the galvanometer assembly by splicing the plate splicing structure 42 and the U-shaped cover plate 41 (i.e., the plates around the perimeter). The disadvantage of this structure is that it has low precision and low reliability.

[0003] Therefore, regarding the existing structures of welding galvanometers, the first structural method involves machining an integral cavity and assembling the various components onto the cavity to complete the assembly of the welding galvanometer. This method has drawbacks such as high requirements for cavity machining, relatively heavy weight, large size, and high cost of the welding galvanometer. The second structural method is simpler, assembling the galvanometer motor onto the clamping block to complete the assembly of the galvanometer assembly. Then, the welding galvanometer is assembled by assembling the galvanometer assembly with the external plates. Although this structural method has lower requirements in terms of weight, size, cost, and machining difficulty, it will correspondingly reduce the precision and performance of the welding galvanometer, and the effect of water cooling and air cooling functions will be poor, affecting the reliability and lifespan of the welding galvanometer. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a welding galvanometer to solve the problems of bulky structure, difficult processing, poor precision, performance, reliability, and heat dissipation in the aforementioned existing technologies.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A welding galvanometer includes an optical structure, an integrated motor support assembly, and a plate assembly. The integrated motor support assembly includes an integrated motor bracket, a drive board, a motor mounting base, and a galvanometer motor assembly. The galvanometer motor assembly is composed of a photoelectric sensor, a galvanometer motor body, a motor lens clip, and a lens connected in sequence. The integrated motor bracket is a hollow cube with a field lens conversion hole on its bottom surface. A galvanometer motor hole is provided on the top surface and / or side surface of the integrated motor bracket. The galvanometer motor assembly holds the galvanometer motor via the motor mounting base. The main body is fixed on the surface of the integrated motor bracket, and the lens extends into the galvanometer motor hole. The drive board is also fixedly installed on one side of the integrated motor bracket and connected to the galvanometer motor assembly via a wiring harness. The drive board, motor mounting base, and galvanometer motor assembly are enclosed inside the shell assembled by the board assembly. One side of the integrated motor bracket has an optical path hole that is fixedly connected to the optical structure. The optical structure includes a collimation adapter and a QBH collimation and beam splitting module. The QBH collimation and beam splitting module is connected to the surface of the integrated motor bracket via the collimation adapter.

[0006] Preferably, the integrated motor bracket is made of aluminum.

[0007] Preferably, the panel assembly includes a base plate, a front panel, a top plate, a connecting plate, a left side plate, a right side plate, and a field lens adapter. The base plate, front panel, top plate, and connecting plate have screw holes on their sides. The left side plate and right side plate also have corresponding screw holes on their surfaces for fixing them to the base plate, front panel, top plate, and connecting plate to form a housing. The front panel, left side plate, and right side plate also have screw holes on their surfaces for fixing the housing to the screw holes on the side of the integrated motor bracket. The field lens adapter is fixed to the field lens conversion seat hole on the bottom surface of the integrated motor bracket.

[0008] Preferably, the bottom plate, front panel, top plate and connecting plate are provided with sealing strip grooves on both sides, and the left side plate and right side plate are provided with sealing strips between the bottom plate, front panel, connecting plate and top plate, and the sealing strips are provided in the sealing strip grooves.

[0009] Preferably, the sealing strip is a fluororubber sealing strip.

[0010] Preferably, the integrated motor bracket assembly further includes a lens temperature probe, which extends into the integrated motor bracket through a temperature probe hole on the wall of the integrated motor bracket and brings the probe close to the lens to be monitored.

[0011] Preferably, the integrated motor bracket assembly further includes a cooling nozzle and a one-way vent valve. The cooling nozzle extends into the integrated motor bracket through a nozzle hole next to the galvanometer motor hole on the wall of the integrated motor bracket, and the nozzle head is close to the lens to be cooled. Gas in the cooling nozzle is ejected from the nozzle head. The one-way vent valve is installed on a vent hole on one side of the wall of the integrated motor bracket, so that the airflow direction is only from the inside to the outside, thereby discharging the gas ejected from the nozzle head outside the integrated motor bracket.

[0012] Preferably, the integrated motor bracket has a through air passage pipe inside the wall, the cooling air nozzle is closed at the far end of the nozzle, and a radial hole is opened on the cooling air nozzle pipe wall to communicate with the nozzle head. The radial hole communicates with the air passage pipe inside the integrated motor bracket wall, and the air passage pipe opens on the outer surface of the integrated motor bracket.

[0013] Preferably, the panel is provided with air passages opening from the top and bottom sides, with an air passage connector installed at the top opening and the bottom side opening communicating with the outer surface opening of the air passage inside the integrated motor bracket.

[0014] Preferably, the integrated motor bracket has a through water pipe inside its wall, the water pipe opening onto the outer surface of the integrated motor bracket, and a water connector is installed at the opening.

[0015] Compared to existing technologies, this solution offers the following advantages: A novel welding galvanometer structure utilizes an integrated motor bracket, assembling the precision-critical galvanometer motor onto this bracket, thus ensuring product accuracy. The integrated motor bracket is then encased by surrounding panels to complete the entire machine. This solution also balances requirements for precision, size, weight, and cost. The novel welding galvanometer of this application features a compact structure, retaining reliability-enhancing functions such as water and air cooling while also achieving miniaturization and weight reduction. It eliminates cumbersome assembly steps, improving galvanometer production efficiency while maintaining the welding galvanometer's performance and reliability. Furthermore, this solution boasts a compact design, minimizing unnecessary design redundancy. The integrated motor bracket implements and ensures the main logical functions of the welding galvanometer, while the surrounding panel structure minimizes its thickness and volume, resulting in a simple, small, and lightweight design.

[0016] This solution has a low-cost advantage: it adopts an integrated motor bracket and plate splicing structure, and uses thin plates as much as possible, which greatly saves material costs; with this structure, the processing difficulty is smaller and the processing time is also greatly reduced, resulting in a very large advantage in overall cost.

[0017] This solution offers a weight advantage: both the integrated motor bracket and the surrounding panel structure utilize low-density aluminum. The integrated motor bracket is minimized as much as possible, eliminating unnecessary material and reducing its weight to the greatest extent. The surrounding panel structure also minimizes the thickness of the sheet metal, further contributing to the miniaturization and light weight of the solution. The simple design results in a smaller overall product size, and the lightweight design also reduces the overall weight. Practical testing shows that the total weight of the welding galvanometer is reduced by more than 30%.

[0018] This solution features excellent sealing performance: Fluororubber sealing strips are used to seal the joints between each plate assembly and at the joints between each plate assembly and the integrated motor bracket. Fluororubber sealing strips are resistant to high temperature and humidity, and can ensure their sealing performance even in harsh environments. This ensures the cleanliness of the galvanometer's interior, prevents dust from entering, avoids lens burn-out due to dust, and ensures welding.

[0019] This solution offers excellent heat dissipation: it incorporates both water and air cooling, integrating a water and air system within the integrated motor bracket. The motor and drive board of the galvanometer are assembled and bonded to the integrated motor bracket, which utilizes aluminum with excellent thermal conductivity to effectively conduct heat from the motor and drive board to the bracket itself. The internal water circulation system removes this heat, ensuring the motor and drive board remain within a reasonable range and guaranteeing the appropriate temperature for the internal components during galvanometer operation. The welding galvanometer is equipped with cooling nozzles, assembled on the integrated motor bracket. These nozzles, connected to the air circulation system, direct airflow towards the lens, using air cooling to remove heat generated during lens operation. A one-way vent valve then expels the high-temperature gas from inside the galvanometer, maintaining the lens's operating temperature. This ensures both the cleanliness of the welding galvanometer cavity and facilitates heat exchange between the internal and external components. Therefore, the highly efficient integrated water-cooled and air-cooled motor bracket structure can effectively dissipate the high heat generated during the operation of the high-power welding galvanometer, preventing heat accumulation and damage to components, thus greatly improving product reliability and lifespan. As can be seen from the 6kW high-power welding temperature data in Tables 1 and 2, this solution has a very significant cooling effect on the inside of the welding galvanometer.

[0020] Table 1 Temperature data for single water-cooled high-power welding galvanometer Table 2 Temperature data for water-cooled + air-cooled high-power welding galvanometers This solution includes a temperature protection function: It is designed with temperature monitoring capabilities. Temperature probes located above the two lenses can monitor the lens temperature in real time. If the temperature exceeds a certain limit, it provides alarm and power-off protection, ensuring the lens temperature remains within a suitable range to prevent damage and thus protecting the lenses. It also facilitates the detection, alarm, and protection against abnormal conditions, preventing harm to the galvanometer or personnel and ensuring product safety.

[0021] This design offers excellent structural stability: The galvanometer motor is held in place by a motor mounting bracket, which is then secured to the integrated motor support using screws. This structure ensures motor stability during operation, preventing disturbances caused by inertia and vibration, and guaranteeing product accuracy. Furthermore, the integrated motor support serves as the central hub, with surrounding panel structures assembled around it. The product's center of gravity is located within this bracket, and the assembled panel structure provides excellent structural stability and impact resistance.

[0022] This solution is easy to manufacture and assemble: It uses a one-piece motor bracket as the centerpiece. Compared to existing technologies where the top and bottom covers need to be carved from a single piece of aluminum, this one-piece bracket eliminates the need for machining the four walls; only the outer shape needs to be machined, reducing manufacturing difficulty. The surrounding panel components are assembled around the one-piece motor bracket, using threads to connect the sheet metal parts. Because the structure avoids complex and redundant designs, it avoids the increased risk caused by too many parts, simplifies the assembly process, and facilitates installation. The absence of cumbersome assembly procedures and high assembly requirements significantly shortens assembly time and improves production efficiency. Attached Figure Description

[0023] Figure 1a This is a three-dimensional schematic diagram of the first structure in the prior art; Figure 1b This is a three-dimensional schematic diagram of the second structure in the prior art; Figure 2 This is a three-dimensional structural diagram of an embodiment of the integrated motor bracket of this application; Figure 3 A three-dimensional structural schematic diagram of an embodiment of the integrated motor bracket assembly of this application; Figure 4 This is an exploded perspective view of an embodiment of the welding galvanometer of this application; Figure 5a This is a three-dimensional structural diagram of an embodiment of the X-ray galvanometer motor assembly of this application; Figure 5b This is a three-dimensional structural diagram of an embodiment of the Y-type galvanometer motor assembly of this application; Figure 6This is a schematic diagram of the axial projection of an embodiment of the welding galvanometer of this application after assembly; Figure 7 This is a three-dimensional structural diagram of an embodiment of the present application showing the fixed structure of an integrated motor bracket and a galvanometer motor. Figure 8a for Figure 6 Schematic diagram of cross-section in plane V; Figure 8b This is an enlarged schematic diagram of point I in 8a; Figure 9 This is a schematic diagram of the internal water and air channels of an embodiment of the integrated motor bracket of this application; Figure 10 This is a perspective view of the interior of the integrated motor bracket as seen from the field lens adapter hole at the bottom of the integrated motor bracket, according to an embodiment of the integrated motor bracket assembly of this application. Figure 11 This is a perspective view of the interior of the integrated motor bracket from a cross-section at the bottom of an embodiment of the integrated motor bracket of this application. Among them, 10-integrated motor bracket, 101-air circuit interface, 102-water circuit interface, 11-drive board, 12a-X galvanometer motor assembly, 12b-Y galvanometer motor assembly, 121-photoelectric sensor, 122-galvanometer motor body, 123a-X motor lens clip, 123b-Y motor lens clip, 124a-X lens, 124b-Y lens, 13-air circuit pipe, 14-motor mounting base, 15a-X cooling nozzle, 15b-Y cooling nozzle, 16-water circuit Pipeline, 17a-X lens temperature probe, 17b-Y lens temperature probe, 18-One-way vent valve, 19-Gas connector, 20-Water connector, 21-Base plate, 22-Front panel, 23-Top plate, 24-Connecting plate, 25-Sealing strip, 26a-Left side plate, 26b-Right side plate, 27-Collimation adapter, 28-Field lens adapter, 29-QBH collimation and beam splitting module, 31-Upper bracket, 32-Lower bracket, 41-U-shaped cover plate, 42-Panel assembly structure, 43-Clamping block structure. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] This embodiment provides a technical solution: a welding galvanometer structure according to this application includes an integrated motor support assembly, plate assembly, and optical and temperature monitoring structure. The integrated motor support assembly includes a galvanometer motor assembly, a motor mounting base 14, a drive board 11, cooling nozzles, and a one-way vent valve 18. In this embodiment, the galvanometer motor assembly includes two sets: an X-galvanometer motor assembly 12a and a Y-galvanometer motor assembly 12b. Therefore, the cooling nozzles are also divided into corresponding X-cooling nozzles 15a and Y-cooling nozzles 15b. In this embodiment, the X-galvanometer motor assembly 12a and the Y-galvanometer motor assembly 12b are mainly composed of a photoelectric sensor 121, a galvanometer motor body 122, an X-motor lens clip 123a / Y-motor lens clip 123b, and an X-lens 124a / Y-lens 124b connected in sequence.

[0026] The integrated motor bracket 10 is a hollow cube with a field lens conversion seat hole on the bottom surface. In this embodiment, the top surface and one side surface of the integrated motor bracket 10 are respectively provided with one galvanometer motor hole and four galvanometer motor fixing holes. The two galvanometer motor assemblies are respectively fixed to the four galvanometer motor fixing holes on both sides of the integrated motor bracket 10 by clamping the galvanometer motor body 122 with the motor fixing seat 14, and the lens extends into the galvanometer motor hole. One side of the integrated motor bracket 10 has an optical path hole for fixed connection with the optical structure. The opposite side of the integrated motor bracket 10 where the Y-galvanometer motor assembly 12b is mounted has an optical path hole for fixed connection with the optical structure.

[0027] The plate assembly includes a base plate 21, a front plate 22, a top plate 23, a connecting plate 24, a sealing strip 25, a left side plate 26a, a right side plate 26b, and a field lens adapter 28, all assembled together with screws. The left side plate 26a and right side plate 26b are fixed to two opposite sides of the integrated motor bracket 10 with screws, forming a shell enclosing the integrated motor bracket assembly. During assembly, the sealing strip 25 seals the entire welding galvanometer cavity, preventing dust from entering. The plate assembly is lightweight, small in size, easy to manufacture, and convenient to assemble, making the entire welding galvanometer miniaturized and lightweight. The temperature monitoring structure includes an X-lens temperature probe 17a and a Y-lens temperature probe 17b installed through the wall of the integrated motor bracket 10 to monitor the temperature of the motor lenses during operation. The optical structure includes a collimation adapter 27 and a QBH collimation and beam splitting module 29. The collimation adapter 27 is assembled onto the side of the integrated motor bracket 10 with the optical path hole using screws and pins. The QBH collimation and beam splitting module 29 is then fastened to the collimation adapter 27 with screws, completing the construction of the galvanometer optical path. This application, through the assembly structure of the plate components and sealing strip 25, ensures that dust, especially from the motor lenses, can enter the welded galvanometer, maintaining its cleanliness and preventing dust and foreign objects from entering and damaging the galvanometer during operation.

[0028] In the integrated motor bracket assembly structure, the galvanometer motor bodies 122 of the X-galvanometer motor assembly 12a and the Y-galvanometer motor assembly 12b are installed into the motor mounting base 14 and then assembled and fixed on the integrated motor bracket 10. The lens extends into the integrated motor bracket 10 to complete the internal reflection optical path of the galvanometer. The drive board 11 is fixed on the integrated motor bracket 10 by fasteners and is connected to the X-galvanometer motor assembly 12a and the Y-galvanometer motor assembly 12b by wire harnesses to provide power to them and control their high-precision logic actions, so that the incoming laser beam is accurately positioned at the position of the part to be welded. In this embodiment, the X cooling nozzle 15a and Y cooling nozzle 15b have truncated conical end holes on their pipe walls. The far end of the nozzle is closed and has a step. The axial position of the cooling nozzle is determined by the step along the nozzle hole on the wall of the integrated motor bracket 10. The cooling nozzle can be accurately assembled onto the integrated motor bracket 10 by using truncated conical end set screws installed from the side of the integrated motor bracket 10. In this embodiment, radial holes are also opened on the cooling nozzle pipe walls to accurately connect with the air passage pipe 13 inside the integrated motor bracket 10. Sealing ring grooves are provided before and after the radial holes to provide air cooling for the motor lens during the welding galvanometer operation, thus cooling the lens during operation. The one-way vent valve 18 is assembled onto the vent hole on the integrated motor bracket 10 through its own threads and sealing ring, which can realize the exchange of hot gas inside the galvanometer and ensure the internal sealing. The cooling nozzle can also use a two-way opening design to provide air from the outside, but compared with the design of the embodiment of this application which is connected through the internal air passage pipe 13 of the integrated motor bracket 10, there is a clear defect of structural complexity. By also setting the air passage pipe 13 and air passage connector 19 on the panel 22, the ease of use of the entire welding galvanometer can be further simplified.

[0029] In this embodiment, the welding galvanometer uses a relatively mature and commonly used X / Y galvanometer motor control. The laser collimating head is inserted into and locked into the QBH collimating and splitting module 29. After the laser is powered on, it illuminates the surface. The collimating lens inside the QBH collimating and splitting module 29 converts the Gaussian beam of the laser into a parallel beam. Then, the laser beam is refracted by the 45° reflecting lens inside the QBH collimating and splitting module 29 and enters the X lens 124a of the galvanometer. After that, it is refracted by the X lens 124a to the Y lens 124b. The Y lens 124b refracts the laser beam out of the welding galvanometer. The parallel beam is then focused onto the parts to be welded by an external field lens, thus realizing the welding function.

[0030] During the operation of the welding galvanometer, the welding of components requires a large amount of energy, so the laser power is generally large. At this time, the laser beam energy is also high, and the heat generated when the laser beam passes through the X / Y lens is also large, which can easily cause overheating damage to the lens. This solution is designed with a wind-cooled nozzle, which blows air onto the lens through the air passage 13 inside the integrated motor bracket 10 to achieve the purpose of heat dissipation. The blown gas is discharged from the welding galvanometer cavity through the one-way vent valve 18, which not only achieves heat dissipation, but also ensures the airtightness of the cavity.

[0031] This solution also integrates the water pipe 16 and the gas pipe 13 into the integrated motor bracket 10, which significantly reduces the temperature rise caused by reflected light beams irradiating the galvanometer cavity, the temperature rise caused by the drive board 11 and the motor during operation, and the temperature rise caused by stray light from laser incidence irradiating into the cavity. Maintaining the temperature of the welding galvanometer within a low range during operation greatly improves the reliability and lifespan of the internal components.

[0032] In this embodiment, the through air pipe 13 and through water pipe 16, which are respectively opened inside the wall of the integrated motor bracket 10, are both opened on the outer surface of the integrated motor bracket 10. These pipes can be processed by drilling, and unused openings can be sealed. The used openings form air interface 101 and water interface 102. There are two water interfaces 102, one for inlet and one for outlet. A water connector 20 is installed at the opening of the water interface 102.

[0033] In the description of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] The above description is only a preferred embodiment of the present solution, but the scope of protection claimed by the present solution is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this application, should be covered within the scope of protection of this application.

Claims

1. A welding galvanometer, comprising an optical structure, characterized in that: It also includes an integrated motor bracket assembly and a plate assembly. The integrated motor bracket assembly includes an integrated motor bracket (10), a drive board (11), a motor mounting base (14), and a galvanometer motor assembly. The galvanometer motor assembly is composed of a photoelectric sensor (121), a galvanometer motor body (122), a motor lens clip, and a lens connected in sequence. The integrated motor bracket (10) is a hollow cube with a field lens conversion seat hole on the bottom surface. The integrated motor bracket (10) has a galvanometer motor hole on its top surface and / or side surface. The galvanometer motor assembly is fixed to the integrated motor bracket by clamping the galvanometer motor body (122) with the motor mounting base (14). The lens extends into the galvanometer motor hole on the surface of the bracket (10). The drive board (11) is also fixedly installed on one side of the integrated motor bracket (10) and connected to the galvanometer motor assembly through a wire harness. The drive board (11), the motor mounting base (14) and the galvanometer motor assembly are enclosed inside the shell assembled by the plate assembly. One side of the integrated motor bracket (10) has an optical path hole and is fixedly connected to the optical structure. The optical structure includes a collimation adapter (27) and a QBH collimation and beam splitting module (29). The QBH collimation and beam splitting module (29) is connected to the surface of the integrated motor bracket (10) through the collimation adapter (27).

2. The welding galvanometer according to claim 1, characterized in that: The integrated motor bracket (10) is made of aluminum.

3. The welding galvanometer according to claim 1, characterized in that: The panel assembly includes a base plate (21), a panel (22), a top plate (23), a connecting plate (24), a left side plate (26a), a right side plate (26b), and a field lens adapter (28). The base plate (21), panel (22), top plate (23), and connecting plate (24) are provided with screw holes on their sides. The left side plate (26a) and right side plate (26b) are also provided with screw holes at corresponding positions on their surfaces for fixing the base plate (21), panel (22), top plate (23), and connecting plate (24) into a shell. The panel (22), left side plate (26a), and right side plate (26b) are also provided with screw holes on their surfaces for fixing the shell to the screw holes on the side of the integrated motor bracket (10). The field lens adapter (28) is fixed to the field lens conversion seat hole on the bottom surface of the integrated motor bracket (10).

4. The welding galvanometer according to claim 3, characterized in that: Sealing grooves are provided on both sides of the bottom plate (21), the front panel (22), the top plate (23) and the connecting plate (24). Sealing strips (25) are provided between the left side plate (26a) and the right side plate (26b) and the bottom plate (21), the front panel (22), the connecting plate (24) and the top plate (23). The sealing strips (25) are provided in the sealing grooves.

5. The welding galvanometer according to claim 4, characterized in that: The sealing strip (25) is a fluororubber sealing strip.

6. The welding galvanometer according to claim 1, characterized in that: The integrated motor bracket assembly also includes a lens temperature probe, which extends into the integrated motor bracket (10) through a temperature probe hole on the wall of the integrated motor bracket (10) and brings its probe close to the lens to be monitored.

7. The welding galvanometer according to claim 3, characterized in that: The integrated motor bracket assembly also includes a cooling nozzle and a one-way vent valve (18). The cooling nozzle extends into the interior of the integrated motor bracket (10) through a nozzle hole next to the galvanometer motor hole on the wall of the integrated motor bracket (10) and brings the nozzle head close to the lens to be cooled. Gas in the cooling nozzle is ejected from the nozzle head. The one-way vent valve (18) is installed on a vent hole on one side of the wall of the integrated motor bracket (10) so that the airflow direction is only from the inside to the outside, thereby discharging the gas ejected from the nozzle head out of the integrated motor bracket (10).

8. The welding galvanometer according to claim 7, characterized in that: The integrated motor bracket (10) has a through air passage pipe (13) inside its wall. The cooling nozzle is closed at the far end of the nozzle and has a radial hole on its wall that communicates with the nozzle head. The radial hole communicates with the air passage pipe (13) inside the wall of the integrated motor bracket (10). The air passage pipe (13) opens on the outer surface of the integrated motor bracket (10).

9. The welding galvanometer according to claim 8, characterized in that: The panel (22) is provided with air passages opening from the top and bottom sides. An air passage connector (19) is installed at the top opening, and the bottom side opening is connected to the outer surface opening of the air passage (13) inside the integrated motor bracket (10).

10. The welding galvanometer according to any one of claims 1-9, characterized in that: The integrated motor bracket (10) has a through water pipe (16) inside its wall. The water pipe (16) opens onto the outer surface of the integrated motor bracket (10), and a water connector (20) is installed at the opening.

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