Laser welding device for electrically powered sickbeds

Abstract

The application discloses a laser welding device of an electric sickbed and belongs to the technical field of laser welding, which comprises a mechanical arm, the front face of the mechanical arm is equipped with a workbench, the left and right sides of the upper surface of the workbench are fixedly provided with adjusting cylinders, the left and right sides of the adjusting cylinders are fixedly provided with height adjusting rods, the middle sections of the height adjusting rods are fixedly provided with mounting cover plates, the inner sides of the mounting cover plates are fixedly connected with rotary cylinders through buckles assembled at the ends of telescopic rods, and the interiors of the mounting cover plates are equipped with flexible pressing mechanisms; the flexible pressing mechanisms comprise upper dies fixedly connected with the bottoms of the rotary cylinders and lower dies fixedly connected with the top of a sliding table, and the upper surface of the lower die is fixedly provided with telescopic supporting columns, and the flexible pressing mechanism can adapt to the shape of parts when the device is pressed, the welding quality is guaranteed, and part deformation caused by excessive pressing force is prevented.

Description

Technical Field

[0001] This application relates to the field of laser welding technology, and more specifically, to a laser welding device for an electric hospital bed. Background Technology

[0002] Electric hospital beds are essential equipment in medical institutions for patient care, rehabilitation, and transport. They typically feature multi-degree-of-freedom adjustment functions, including bed surface raising and lowering, backrest raising and lowering, and leg flexion and extension. The realization of these functions relies on the stable connections between the bed frame, lifting mechanism, drive components (such as electric actuators), and connecting parts. Therefore, the welding quality between the metal components of the electric hospital bed (such as carbon steel, stainless steel, or aluminum alloy parts) directly affects the overall structural strength, service life, and patient safety of the bed.

[0003] Existing technologies generally use rigid clamping mechanisms for clamping and positioning. These clamping mechanisms have a single specification. During the clamping operation, if the parts are of different specifications, forcibly clamping them can easily damage the parts, thereby affecting the welding quality. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a laser welding device for an electric hospital bed, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this application provides a laser welding device for an electric hospital bed, including a robotic arm. A worktable is mounted on the front of the robotic arm, and a conveyor rail is fixed on the upper surface of the worktable. Adjusting cylinders are fixed on both the left and right sides of the upper surface of the worktable, and height adjusting rods are fixed on both sides of the adjusting cylinders. A mounting cover plate is fixed in the middle section of the height adjusting rod. The inner side of the mounting cover plate is fixedly connected to a rotating cylinder through a buckle mounted at the end of a telescopic rod. A flexible pressing mechanism is mounted inside the mounting cover plate. The flexible clamping mechanism includes an upper mold fixedly connected to the bottom of a rotary cylinder and a lower mold fixedly connected to the top of a slide table. A connecting ring is fixed to the lower surface of the lower mold. A clamping rod is assembled at the bottom of the upper mold. A heat-resistant pressure head is sleeved at the end of the clamping rod. A ring of fixed supports is fixed to the outside of the clamping rod. A telescopic support column is fixed to the upper surface of the lower mold. A connecting shaft is fixed to the middle of the top of the telescopic support column.

[0006] Preferably, the housing of each clamping rod is hollow, and each clamping rod has a spring installed inside.

[0007] Preferably, a cooling device is mounted on the outer side of the flexible clamping mechanism, and a circulating power device is mounted below the cooling device.

[0008] Preferably, the cooling device consists of a mounting plate and multiple refrigeration pipes. Hydraulic chambers are fixed on both sides of the refrigeration pipes. A hydraulic rod is fixed and connected to the top of the hydraulic chamber. A temperature sensor is fixed inside the hydraulic chamber. A connecting rod is fixedly installed on the top of the hydraulic rod. Telescopic liquid guide rods are installed in the middle of both sides of the refrigeration pipes. A liquid inlet is installed at the end of the telescopic liquid guide rod. A flexible hose is installed at the end of the liquid inlet.

[0009] Preferably, there are five cooling pipes evenly distributed on the inner side of the mounting plate.

[0010] Preferably, the circulating power device includes a circulating pump, a liquid storage tank is fixed to the right side of the circulating pump, a water inlet is fixed to the back side of the liquid storage tank near the top, a heat dissipation hole is fixed to the back side of the liquid storage tank near the top, the liquid storage tank is movably connected to the filter box through a connecting pipe, and a pressure gauge is fixed to the front side of the liquid storage tank near the top.

[0011] Preferably, a filter element is fixed inside the filter box, and a filter screen is installed on the left side inside the filter box.

[0012] Preferably, the liquid storage tank is made of stainless steel, has a water inlet on the top, and has internal baffles to reduce media turbulence.

[0013] The advantages of this application are: (1) By setting up a flexible pressing mechanism, the heat-resistant pressure head can contact the part first and then squeeze the spring in the pressing rod when pressing the object. The heat-resistant pressure head is wear-resistant and adaptable to parts of different shapes, which not only produces an adaptive fitting effect, but also improves the welding consistency and makes welding more convenient.

[0014] (2) By setting up a cooling device, when welding is completed, the coolant is filled into the cooling pipe and the clamping rod. The coolant can be pre-cooled before it takes effect, which can quickly cool and extend the life of the component. After being filled, the part is pushed out smoothly to avoid bumping and damaging the welding surface, making it easier to pick up.

[0015] (3) This application enables the coolant to be recycled by setting up a circulating power device. The circulating pump has low energy consumption and stable delivery. The liquid storage tank baffle makes the coolant flow more evenly. After welding, it is delivered to the cooling device through a hose, which better solves the problems of thermal deformation. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1This is a schematic diagram of the overall appearance and structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall appearance and structure of the present invention. Figure 2 ; Figure 3 This is a partial structural diagram of the present invention. Figure 1 ; Figure 4 This is a partial structural diagram of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the flexible clamping structure of the present invention; Figure 6 This is a schematic diagram of the cooling device structure of the present invention; Figure 7 This is a schematic diagram of the circulating power device structure of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the ring power device structure of the present invention. Figure 2 .

[0017] In the above image, 100. Robotic arm; 200. Worktable; 300. Adjusting cylinder; 400. Height adjusting rod; 500. Conveyor track; 600. Mounting cover plate; 700. Rotary cylinder; 800. Flexible clamping mechanism; 801. Heat-resistant pressure head; 802. Upper mold; 803. Spring; 804. Connecting ring; 805. Fixed support; 806. Lower mold; 807. Clamping rod; 808. Telescopic support column; 809. Connecting shaft; 900. Cooling device; 901. Refrigeration pipe; 902. Hydraulic rod; 903. Temperature sensor; 904. Connecting rod; 905. Telescopic liquid guide rod; 906. Infusion port; 907. Hoses; 909. Hydraulic chamber; 1100. Circulating power unit; 1101. Circulating pump; 1102. Liquid storage tank; 1103. Heat dissipation hole; 1104. Pressure gauge; 1105. Water inlet; 1106. Connecting pipe; 1107. Filter box; 1108. Filter element; 1109. Filter screen. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Example 1, see Figures 1-5This embodiment provides a laser welding device for an electric hospital bed, including a robotic arm 100. A worktable 200 is mounted on the front of the robotic arm 100. The robotic arm 100 can move along a preset trajectory, driving the welding components into the welding area for precise welding. The worktable 200 provides an installation carrier and working platform for each component, ensuring the stability of the overall structure. A conveyor rail 500 is fixed to the upper surface of the worktable 200, which assists in conveying parts, enabling automated loading and unloading of parts and improving work efficiency. Adjustable cylinders 300 are fixed to both the left and right sides of the upper surface of the worktable 200. The adjustable cylinders 300 provide power for height adjustment, driving a height adjustment rod 400 to move up and down. Height adjustment rods 400 are fixed to both sides of the adjustable cylinders 300, allowing for precise adjustment of the height of the mounting cover plate 600 to accommodate the clamping requirements of parts of different thicknesses. A cover plate 600 is fixedly mounted in the middle of the height adjustment rod 400. The cover plate 600 is used to fix the rotary cylinder 700 and the flexible clamping mechanism 800, realizing the integrated assembly of the components. The inner side of the cover plate 600 is fixedly connected to the rotary cylinder 700 through a buckle at the end of its own telescopic rod. The rotary cylinder 700 can drive the upper clamping mechanism to rotate and press downward, providing power for the clamping action. The buckle connection method facilitates disassembly and maintenance, improving the convenience of equipment maintenance. The flexible clamping mechanism 800 is installed inside the cover plate 600. The flexible clamping mechanism 800 can adapt to the size of the parts to clamp them, avoiding damage to the parts under pressure, while ensuring clamping stability.

[0025] The flexible clamping mechanism 800 includes an upper mold 802 fixedly connected to the bottom of the rotary cylinder 700 and a lower mold 806 fixedly connected to the top of the slide table. The upper mold 802 and the lower mold 806 cooperate to form a clamping space for positioning and clamping the parts. The cooperation between the upper mold 802 and the lower mold 806 ensures that the part's reference is precisely aligned with the welding path, improving welding accuracy. A connecting ring 804 is fixed to the lower surface of the lower mold 806 to enhance the connection stability between the lower mold 806 and the slide table. A clamping rod 807 is mounted on the bottom of the upper mold 802. The clamping rod 807 directly contacts the part and applies clamping force. The interior of the housing of the clamping rod 807 is hollow, and a spring 803 is installed inside each clamping rod 807. The hollow structure facilitates the subsequent injection of cooling medium. Spring 803 allows clamping rod 807 to adapt to the size of the part and clamp it, avoiding damage to the part due to overpressure. A heat-resistant pressure head 801 is sleeved at the end of clamping rod 807. The heat-resistant pressure head 801 can withstand the high temperature during welding, preventing the pressure head from deforming due to high temperature and extending its service life. A ring of fixing support 805 is fixed on the outside of clamping rod 807. The fixing support 805 is used to reinforce clamping rod 807 and prevent displacement during clamping. A telescopic support column 808 is fixed on the upper surface of lower mold 806. The telescopic support column 808 can extend and retract axially, and works with the clamping mechanism to achieve clamping and loosening of the part. A connecting shaft 809 is fixed at the top center of telescopic support column 808. The connecting shaft 809 enhances the structural stability of telescopic support column 808 and makes the overall connection more reliable during clamping.

[0026] In practical use, during the clamping welding process, the parts are first transported via the conveyor track 500 to the lower mold 806 of the flexible clamping mechanism 800. The parts are then precisely placed in the positioning groove of the lower mold 806, ensuring alignment between the part's reference point and the welding path. Subsequently, the adjusting cylinder 300 is activated, driving the height adjusting rod 400 downwards, which in turn moves the mounting cover plate 600 and the flexible clamping mechanism 800 to a preset height. Simultaneously, the telescopic support column 808 retracts axially along the connecting shaft 809, and the rotary cylinder 700 is activated, driving the upper clamping mechanism to clamp downwards. At this time, the telescopic support column 808, in conjunction with the upper mold 802, forms a clamping force on the parts. During clamping, the spring 803 inside the clamping rod 807 undergoes elastic deformation, causing the clamping rod 807 to adapt to the size of the parts and clamp them, ensuring uniform force distribution across all parts of the parts. After clamping is complete, the robotic arm 100 probes into the welding area along a preset trajectory, and the laser welding component is precisely aligned with the welding path to complete the laser welding operation. After welding is completed, the rotary cylinder 700 drives the upper clamping mechanism to reset upward, the telescopic support column 808 extends axially, releases the parts, and finally the welded parts are transported to the next process via the conveyor rail 500.

[0027] Example 2, see Figures 1-6In this embodiment, based on Embodiment 1, a cooling device 900 is mounted on the outer side of the flexible clamping mechanism 800. The cooling device 900 can quickly absorb heat from the welding area, preventing parts from deforming due to high temperatures and extending the service life of the clamping components. The cooling device 900 consists of a mounting plate and multiple cooling pipes 901. There are five cooling pipes 901, evenly distributed on the inner side of the mounting plate. The even distribution of multiple cooling pipes 901 ensures uniform heat dissipation, improves cooling efficiency, and quickly reduces the temperature of the welding area to a safe range. Hydraulic chambers 909 are fixed on both sides of the cooling pipes 901. A hydraulic rod 902 is fixed and connected to the top of the hydraulic chambers 909. A temperature sensor 903 is fixed on the inner side of the hydraulic chambers 909. A connecting rod 904 is fixedly installed on the top of the hydraulic rod 902. Telescopic liquid guide rods 905 are mounted in the middle of both sides of the cooling pipes 901. A liquid inlet 906 is mounted at the end of the telescopic liquid guide rod 905, and a hose 907 is mounted at the end of the liquid inlet 906. The cooling pipe 901 is the core component for heat absorption, the hydraulic chamber 909 provides power, the temperature sensor 903 monitors the temperature, and the telescopic liquid guide rod 905 and the liquid inlet 906 work together to achieve precise coolant delivery. All components work in tandem to achieve integrated cooling, temperature control, and automatic part release, improving operational efficiency. The hydraulic chamber 909 provides hydraulic power to the hydraulic rod 902, driving its up-and-down movement. The hydraulic rod 902 can lift the upper mold 802, enabling automatic release of the welded parts. The temperature sensor 903 can detect the temperature of the welding area in real time, precisely triggering the cooling stop and the lifting of the upper mold 802 to avoid over-cooling or insufficient cooling. The connecting rod 904 connects the hydraulic rod 902 and the upper mold 802 to achieve power transmission. The telescopic liquid guide rod 905 can adjust the position of the liquid inlet 906 to ensure precise coolant delivery to the target area; the telescopic structure adapts to different cooling range requirements, improving cooling flexibility. The hose 907 is used to deliver coolant, and the inlet 906 can evenly distribute the coolant into the refrigeration pipe 901 and the hollow cavity of the clamping rod 807. The connection method of the hose 907 is easy to adapt to the extension and retraction of the telescopic liquid guide rod 905, avoiding damage to the pipeline by pulling.

[0028] In practical use, after the welding operation is completed, the cooling device 900 automatically starts. Coolant is delivered to the inlet 906 via hose 907 and evenly distributed to the five cooling pipes 901 via telescopic guide rod 905. The cooling pipes 901 contact the welding area and rapidly absorb heat through heat conduction, achieving rapid cooling of the welded area. Simultaneously, the temperature sensor 903 inside the hydraulic chamber 909 monitors the area temperature in real time. When the detected temperature drops below 80 degrees Celsius, the temperature sensor 903 sends a signal to trigger the hydraulic chamber 909 to operate. Hydraulic pressure is generated within the hydraulic chamber 909, pushing the hydraulic rod 902 upwards. The hydraulic rod 902, through connecting rod 904, synchronously lifts the upper mold 802, providing space for part removal. During this process, the telescopic liquid guide rod 905 injects coolant into the hollow cavity of the clamping rod 807. On the one hand, the coolant absorbs the heat of the clamping rod 807 and the heat-resistant pressure head 801, further cooling the clamping components and preventing high temperature from affecting the service life of the components. On the other hand, the pressure of the coolant is used to smoothly push the welded parts out of the positioning groove of the lower mold 806, avoiding scratches on the surface of the parts due to improper operation when manually picking them up, and realizing automated unloading of the parts.

[0029] Example 3, see Figures 1-8In this embodiment, based on Embodiment 1, a circulating power unit 1100 is installed below the cooling device 900. The circulating power unit 1100 can realize the recycling of coolant, reduce coolant consumption costs, and form a stable cooling closed loop to ensure cooling efficiency. The circulating power unit 1100 includes a circulating pump 1101, a liquid storage tank 1102 is fixed to the right side of the circulating pump 1101, a water inlet 1105 is fixed to the back of the liquid storage tank 1102 near the top, and a heat dissipation hole 1103 is fixed to the back of the liquid storage tank 1102 near the top. The liquid storage tank 1102 is movably connected to the filter box 1107 through a connecting pipe 1106, and a pressure gauge 1104 is fixed to the front of the liquid storage tank 1102 near the top. The circulating pump 1101 provides circulation power, the coolant tank 1102 stores coolant, the filter box 1107 purifies the coolant, and the pressure gauge 1104 monitors the system pressure. These components work together to form a complete circulation system, ensuring a clean and continuous supply of coolant, suitable for continuous operation. The filter box 1107 contains a fixed filter element 1108, and a filter screen 1109 is installed on the left side of the filter box. The filter screen 1109 first filters out large particles of impurities in the coolant, and the filter element 1108 further removes fine particles. This dual filtration ensures the cleanliness of the coolant. Clean coolant prevents clogging of the refrigerant pipe 901 and the inlet 906, ensuring stable operation of the cooling system. The coolant tank 1102 is made of stainless steel, with a water inlet 1105 on the top and internal baffles to reduce media turbulence. The coolant reservoir 1102 stores coolant, continuously supplying it to the cooling device 900. Made of stainless steel, it is corrosion-resistant and high-temperature resistant, extending its service life. A baffle design reduces coolant turbulence, prevents impurity buildup, and ensures coolant cleanliness. The inlet 1105 facilitates replenishment of lost coolant, improving maintenance convenience. The heat dissipation holes 1103 help lower the coolant temperature within the reservoir 1102, preventing overheating due to prolonged circulation and ensuring cooling efficiency. The connecting pipe 1106 provides a coolant transport channel, enabling coolant flow between the reservoir 1102 and the filter box 1107. The movable connection facilitates the disassembly of the filter box 1107 and the replacement of the filter element 1108. The pressure gauge 1104 monitors the pressure of the circulation system in real time, allowing operators to monitor the system's operating status. Abnormal pressure can be detected and addressed promptly, preventing cooling system malfunctions due to pressure issues.

[0030] In practical use, after the cooling operation in Embodiment 2 is completed, the circulation pump 1101 of the circulation power unit 1100 automatically starts. The circulation pump 1101 generates suction to draw the used coolant from the cooling device 900 back from the hose 907. The coolant passes through the inlet 906 and the telescopic guide rod 905 before being delivered to the filter box 1107. After entering the filter box 1107, the coolant first passes through the filter screen 1109 on the left side to filter out large particles of impurities generated during the welding process, and then flows through the filter element 1108. The filter element 1108 adsorbs fine impurity particles in the coolant, achieving deep purification of the coolant. The filtered clean coolant flows back to the storage tank 1102 for storage through the connecting pipe 1106. The baffles in the storage tank 1102 reduce the turbulence of the coolant and prevent the filtered impurities from being resuspended. At the same time, the heat dissipation holes 1103 on the back of the storage tank 1102 dissipate heat naturally, reducing the coolant temperature. During the process, the pressure gauge 1104 on the front of the liquid storage tank 1102 displays the pressure value of the circulation system in real time, and the operator can monitor the system's operating status through the pressure gauge 1104. When the coolant level in the liquid storage tank 1102 is too low, new coolant can be added through the top water inlet 1105. The purified coolant can be drawn again by the circulation pump 1101 and transported to the cooling device 900, forming a stable coolant circulation closed loop, which meets the continuous welding operation requirements of the equipment and reduces coolant waste.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A laser welding device for an electrically powered bed, comprising a robot arm (100), characterized in that, The front of the robotic arm (100) is equipped with a worktable (200), and a conveyor rail (500) is fixed on the upper surface of the worktable (200). Adjustment cylinders (300) are fixed on both the left and right sides of the upper surface of the worktable (200), and height adjustment rods (400) are fixed on both sides of the adjustment cylinders (300). A mounting cover plate (600) is fixed in the middle section of the height adjustment rod (400). The inner side of the mounting cover plate (600) is fixedly connected to the rotary cylinder (700) through the buckle at the end of the telescopic rod assembled on its own. A flexible pressing mechanism (800) is assembled inside the mounting cover plate (600). The flexible clamping mechanism (800) includes an upper mold (802) fixedly connected to the bottom of a rotary cylinder (700) and a lower mold (806) fixedly connected to the top of a slide table. A connecting ring (804) is fixed to the lower surface of the lower mold (806). A clamping rod (807) is assembled at the bottom of the upper mold (802). A heat-resistant pressure head (801) is sleeved at the end of the clamping rod (807). A fixed support (805) is fixed to the outside of the clamping rod (807). A telescopic support column (808) is fixed to the upper surface of the lower mold (806). A connecting shaft (809) is fixed to the middle of the top of the telescopic support column (808).

2. The laser welding device for an electric hospital bed according to claim 1, characterized in that, The housing of each clamping rod (807) is hollow, and each clamping rod (807) is equipped with a spring (803).

3. The laser welding device for an electric hospital bed according to claim 1, characterized in that, A cooling device (900) is mounted on the outside of the flexible pressing mechanism (800), and a circulating power device (1100) is mounted below the cooling device (900).

4. The laser welding device for an electric hospital bed according to claim 3, characterized in that, The cooling device (900) consists of a mounting plate and multiple cooling pipes (901). Hydraulic chambers (909) are fixed on both sides of the cooling pipes (901). A hydraulic rod (902) is fixed and connected to the top of the hydraulic chambers (909). A temperature sensor (903) is fixed on the inside of the hydraulic chambers (909). A connecting rod (904) is fixedly installed on the top of the hydraulic rod (902). Telescopic liquid guide rods (905) are installed in the middle of both sides of the cooling pipes (901). An inlet (906) is installed at the end of the telescopic liquid guide rod (905). A hose (907) is installed at the end of the inlet (906).

5. The laser welding device for an electric hospital bed according to claim 4, characterized in that, There are five cooling pipes (901) evenly distributed on the inside of the mounting plate.

6. The laser welding device for an electric hospital bed according to claim 3, characterized in that, The circulating power unit (1100) includes a circulating pump (1101), a liquid storage tank (1102) is fixed on the right side of the circulating pump (1101), a water inlet (1105) is fixed on the back side of the liquid storage tank (1102) near the top, a heat dissipation hole (1103) is fixed on the back side of the liquid storage tank (1102) near the top, the liquid storage tank (1102) is movably connected to the filter box (1107) through a connecting pipe (1106), and a pressure gauge (1104) is fixed on the front side of the liquid storage tank (1102) near the top.

7. The laser welding device for an electric hospital bed according to claim 6, characterized in that, The filter box (1107) has a filter element (1108) fixed inside, and a filter screen (1109) is installed on the left side inside the filter box (1107).

8. The laser welding device for an electric hospital bed according to claim 7, characterized in that, The liquid storage tank (1102) is made of stainless steel and has a water inlet (1105) on the top. It is equipped with a baffle to reduce media turbulence.

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