Mechanical arm

Abstract

The invention belongs to the technical field of mechanical arms, and particularly relates to a mechanical arm which comprises a mechanical arm body, a support is arranged at one end of the mechanical arm body, a welding gun is connected to the top end of the support in a penetrating mode, and a connecting plate is connected to the surface of the bottom of the mechanical arm body. The suction hood is installed on the welding gun accessory, when the manipulator body drives the welding gun to conduct welding operation, the exhaust fan is started and enables the suction fan to generate suction force in the shell through the pipeline, in this way, the shell enables the suction hood connected with one end of the conveying hose to generate suction force through the connecting pipe, and smoke generated during welding can be adsorbed away; the smoke is conveyed into the shell to circulate, particulate matters and harmful substances in the circulating smoke can be filtered by the silk screen filter element and the activated carbon filter element in the filter box in the shell, the filtered smoke can be discharged from the output end of the exhaust fan, and the situation that the working environment is polluted due to the fact that the smoke is not treated and drifts in the air is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of robotic arms, and particularly relates to a robotic arm. Background Art

[0002] A robotic arm is an automated mechanical device that mimics the movements of a human arm and is typically composed of a mechanical structure, a drive system, a control system, sensors, and other components.

[0003] A welding robotic arm is also a type of robotic arm and is an industrial robot specifically used for welding operations. It can automatically complete welding tasks and has advantages such as high precision, high efficiency, and high stability, and is widely used in modern manufacturing. However, when a welding robotic arm performs a welding operation, welding fumes are generated at the workpiece welding position. The welding fumes contain metal oxide particles and some harmful substances, and the welding robotic arm cannot collect and process these welding fumes, resulting in the welding fumes directly dispersing into the working environment, thus polluting the working environment and causing damage to the operator's body after inhaling the fumes. At the same time, when installing a welding robotic arm, it is generally installed on a base with fixing bolts. When an operator needs to disassemble the welding robotic arm for maintenance, tools are required to disassemble multiple bolts, which is time-consuming and laborious, thus bringing inconvenience to the maintenance of the welding robotic arm.

[0004] Therefore, the present invention provides a robotic arm to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a robotic arm, aiming to solve the problems in the prior art that when the existing welding robotic arm performs a welding operation, welding fumes are generated at the workpiece welding position. The welding fumes contain metal oxide particles and some harmful substances, and the welding robotic arm cannot collect and process these welding fumes, resulting in the welding fumes directly dispersing into the working environment, thus polluting the working environment and causing damage to the operator's body after inhaling the fumes. At the same time, when installing a welding robotic arm, it is generally installed on a base with fixing bolts. When an operator needs to disassemble the welding robotic arm for maintenance, tools are required to disassemble multiple bolts, which is time-consuming and laborious, thus bringing inconvenience to the maintenance of the welding robotic arm.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a robot arm comprises a robot body, a bracket is provided at one end of the robot body, a welding gun is connected through the top of the bracket, a connecting plate is connected to the bottom surface of the robot body, a base is connected to the bottom surface of the connecting plate, a mounting frame is fixedly connected to the front end surface of the bottom end of the bracket, a suction hood is connected to the side surface of the mounting frame facing the welding gun, one end of the suction hood extends into the mounting frame and is connected to one end of a delivery hose, the other end of the delivery hose is connected to a connecting pipe through a threaded joint, and the delivery hose is slidably mounted on the mounting frame through a fixed block. On the manipulator body, the other end of the connecting pipe extends into the interior of the shell, the shell is connected to one side surface of the connecting plate, and a pipe is connected to the end surface of the shell away from the connecting pipe, the other end of the pipe is connected to the input end of the exhaust fan, and the exhaust fan is also connected to one side surface of the connecting plate, a placement groove is opened on one side surface of the shell, a filter box is slidably placed inside the placement groove, a connecting block is connected to the bottom surface of the manipulator body, one end of the connecting block extends into the connecting groove opened on the top surface of the connecting plate, and limiting grooves are opened on both side surfaces of the connecting block, and limiting blocks are slidably inserted inside the limiting grooves.

[0007] As a preferred embodiment of a mechanical arm of the present invention, the top surface of the filter box is provided with two groups of installation grooves, a wire mesh filter element is slidably placed inside one of the installation grooves, and an activated carbon filter element is slidably placed inside the other installation groove.

[0008] As a preferred embodiment of the robot arm of the present invention, a sealing ring is connected around the outer surface of the front end of the filter box, and one end of the sealing ring is engaged with a sealing groove opened on the inner surface of the placement groove.

[0009] As a preferred mechanical arm of the present invention, a slot is symmetrically provided on the surface of one end at the front end of the filter box, one end of a movable rod is slidably inserted into the slot, the other end of the movable rod is penetrated and connected with a protrusion, the protrusion is connected to the inner surface of one end of the slide groove, the slide groove is symmetrically provided on the surface of one side of the filter box, and a spring penetrated by the movable rod is provided inside the protrusion.

[0010] As a preferred embodiment of the mechanical arm of the present invention, one end of a toggle block is connected to the interior of the slide groove, and one end surface of the toggle block facing the protrusion is connected to the movable plug rod.

[0011] As a preferred mechanical arm of the present invention, a movable groove is opened in the middle position of the bottom surface of the connecting plate, and the inner two side surfaces of the movable groove are connected with first bearings, and a bidirectional screw is connected between the two first bearings. One end of the bidirectional screw extends into the connecting plate and is fixedly connected to the output end of the first motor, and movable blocks are threadedly connected at both ends of the bidirectional screw.

[0012] Preferably, for a robotic arm of the present invention, a moving plate is connected to the top surface of the movable block. One end of the moving plate extends into a moving groove opened inside the connecting plate. On the side surface of the moving plate facing the connecting block, limiting insertion blocks are symmetrically connected. The position of the moving groove is communicated with the position of the moving groove.

[0013] Preferably, for a robotic arm of the present invention, through grooves are symmetrically opened on the top surface of the mounting frame. On both side surfaces inside the through grooves, second bearings are connected. Between the two second bearings, a one-way screw rod is connected. One end of the one-way screw rod extends into the mounting frame and is fixedly connected to the output end of the second motor. And a slider is threadedly connected through one end of the one-way screw rod.

[0014] Preferably, for a robotic arm of the present invention, the slider passes through the through groove and extends into the positioning groove. The positioning grooves are symmetrically opened on the bottom surface of the connecting plate. Bolts are connected through both end surfaces of the connecting plate. The other end of the bolt passes through the slider and forms a threaded connection with the connecting plate.

[0015] Preferably, for a robotic arm of the present invention, the exhaust fan, the first motor and the second motor are electrically connected through a control switch and an external power source.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In the present invention, a suction hood is installed on the welding torch accessory. When the manipulator body drives the welding torch to perform welding operations, the exhaust fan is started, so that the exhaust fan generates suction in the housing through the pipeline. In this way, the housing will generate suction at the suction hood connected to one end of the conveying hose through the connecting pipe. In this way, the smoke generated by welding will be adsorbed and then conveyed into the housing for circulation, so that the wire mesh filter core and the activated carbon filter core in the filter box in the housing can filter the particulate matter and harmful substances in the circulating smoke. In this way, the filtered smoke will be discharged from the output end of the exhaust fan to prevent the unprocessed smoke from spreading in the air and polluting the working environment.

[0018] In the present invention, the toggle block is used to pull the movable insertion rod to squeeze the spring in the convex block, so that one end of the movable insertion rod is separated from the slot on the filter box, enabling the operator to disassemble the filter box without tools to maintain the internal wire mesh filter core and activated carbon filter core, thus bringing convenience to the maintenance work of the operator.

[0019] By starting the first motor, the output end of the first motor drives the bidirectional screw to rotate, so that the movable block on the bidirectional screw drives the moving plate to move in the moving groove. At this time, the moving plate can drive the limit insertion block to separate from the limit groove on the connecting block, so that the moving plate can be separated from the connecting plate, and thus the manipulator body can be disassembled from the connecting plate, enabling the operator to complete the disassembly work of the manipulator body without tools, which brings convenience to the maintenance of the manipulator body.

[0020] By starting the second motor, the output end of the second motor drives the unidirectional screw to rotate, so that the slider on the unidirectional screw moves along the through groove. At this time, the slider drives the connected connecting plate to move, enabling the position of the manipulator body on the connecting plate to move left and right, thereby increasing the working range of the manipulator body and improving the applicability of the manipulator body. Brief Description of the Drawings

[0021] The drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 is the Figure 1 partial enlarged structural schematic diagram at A in the present invention;

[0024] Figure 3 is a bottom view structural schematic diagram of the present invention;

[0025] Figure 4 is a partial structural schematic diagram of the housing of the present invention;

[0026] Figure 5 is a partial exploded structural schematic diagram of the housing of the present invention;

[0027] Figure 6 is a partial sectional structural schematic diagram of the convex block of the present invention;

[0028] Figure 7 is a partial exploded structural schematic diagram of the connecting plate of the present invention;

[0029] Figure 8 is a partial sectional structural schematic diagram of the connecting plate of the present invention;

[0030] Figure 9 is a bottom view structural schematic diagram of the connecting plate of the present invention.

[0031] In the figure: 1. robot body; 2. bracket; 3. welding gun; 4. connecting plate; 5. base; 6. mounting frame; 7. suction hood; 8. conveying hose; 9. fixing block; 10. connecting pipe; 11. shell; 12. pipeline; 13. exhaust fan; 14. placement slot; 15. filter box; 16. mounting slot; 17. wire mesh filter element; 18. activated carbon filter element; 19. sealing ring; 20. sealing slot; 21. slot; 22. movable plug rod; 23. , protrusion; 24, slide groove; 25, spring; 26, toggle block; 27, connecting block; 28, connecting groove; 29, limit groove; 30, limit plug; 31, moving plate; 32, moving groove; 33, movable groove; 34, first bearing; 35, bidirectional screw; 36, first motor; 37, movable block; 38, through groove; 39, second bearing; 40, unidirectional screw; 41, second motor; 42, slider; 43, positioning groove; 44, bolt. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1-9 The present invention provides the following technical solutions: a robot arm, including a robot body 1, the robot body 1 model is LH1500-B-6 six-axis welding robot arm, a bracket 2 is provided at one end of the robot body 1, a welding gun 3 is connected through the top of the bracket 2, a connecting plate 4 is connected to the bottom surface of the robot body 1, a base 5 is connected to the bottom surface of the connecting plate 4, a mounting frame 6 is fixedly connected to the front end surface of the bottom end of the bracket 2, a suction hood 7 is connected to the side surface of the mounting frame 6 facing the welding gun 3, one end of the suction hood 7 extends into the mounting frame 6 and is connected to one end of a delivery hose 8, the other end of the delivery hose 8 is connected to a connecting pipe 10 through a threaded joint, and the delivery hose 8 is slidably mounted on the fixing block 9. On the manipulator body 1, the other end of the connecting pipe 10 extends into the interior of the shell 11, the shell 11 is connected to the side surface of the connecting plate 4, and the end surface of the shell 11 away from the connecting pipe 10 is connected with a pipe 12, the other end of the pipe 12 is connected to the input end of the exhaust fan 13, and the exhaust fan 13 is also connected to the side surface of the connecting plate 4. A placement groove 14 is opened on one side surface of the shell 11, and a filter box 15 is slidably placed inside the placement groove 14. A connecting block 27 is connected to the bottom surface of the manipulator body 1, one end of the connecting block 27 extends into the connecting groove 28 opened on the top surface of the connecting plate 4, and limiting grooves 29 are opened on both side surfaces of the connecting block 27, and limiting plug blocks 30 are slidably inserted inside the limiting grooves 29.

[0034] Preferably, two groups of mounting grooves 16 are provided on the top surface of the filter box 15 , a wire mesh filter element 17 is slidably placed inside one of the mounting grooves 16 , and an activated carbon filter element 18 is slidably placed inside the other of the mounting grooves 16 .

[0035] During specific use, the wire mesh filter element 17 and the activated carbon filter element 18 can slide in the installation groove 16 on the filter box 15, so that the wire mesh filter element 17 and the activated carbon filter element 18 can slide into or separate from the installation groove 16 on the filter box 15. The wire mesh filter element 17 and the activated carbon filter element 18 can be customized to the required size for use.

[0036] Preferably, a sealing ring 19 is connected around the outer surface of the front end of the filter box 15 , and one end of the sealing ring 19 is engaged in a sealing groove 20 provided on the inner surface of the placement groove 14 .

[0037] During specific use, the sealing ring 19 is made of rubber. When the filter box 15 is slid into the placement groove 14 on the shell 11, the sealing ring 19 on the filter box 15 will also move to the sealing groove 20, allowing the sealing ring 19 to be elastically engaged in the sealing groove 20, thereby increasing the sealing between the filter box 15 and the shell 11, ensuring that smoke will not escape from the placement groove 14.

[0038] Preferably: a slot 21 is symmetrically provided on the surface of one end at the front end of the filter box 15, one end of a movable rod 22 is slidably inserted into the slot 21, the other end of the movable rod 22 is penetrated and connected with a protrusion 23, the protrusion 23 is connected to the inner surface of one end of a slide groove 24, the slide groove 24 is symmetrically provided on the surface of one side of the filter box 15, and a spring 25 penetrated by the movable rod 22 is provided inside the protrusion 23.

[0039] During specific use, the movable rod 22 can be elastically extended and retracted on the protrusion 23 by the spring 25. When the movable rod 22 squeezes the spring 25, one end of the movable rod 22 can be separated from the slot 21 on the filter box 15. After the movable rod 22 is released, the spring 25 will elastically push one end of the movable rod 22, allowing one end of the movable rod 22 to slide and be inserted into the slot 21 on the filter box 15, so that the position of the filter box 15 is fixed in the placement groove 14.

[0040] Preferably, one end of a toggle block 26 is connected inside the slide groove 24 , and one end surface of the toggle block 26 facing the protrusion 23 is connected to the movable insertion rod 22 .

[0041] During specific use, one end of the toggle block 26 can slide in the slide groove 24 . By pushing the toggle block 26 to move inside the slide groove 24 , the toggle block 26 can simultaneously drive the two movable rods 22 to slide on the protrusion 23 .

[0042] Preferably, a movable groove 33 is formed in the middle position of the bottom surface of the connecting plate 4. Both side surfaces inside the movable groove 33 are connected with a first bearing 34. A bidirectional screw 35 is connected between the two first bearings 34. One end of the bidirectional screw 35 extends into the connecting plate 4 and is fixedly connected with the output end of the first motor 36. And movable blocks 37 are threadedly connected through both ends of the bidirectional screw 35.

[0043] During specific use, by starting the first motor 36, the output end of the first motor 36 can drive the bidirectional screw 35 to rotate in the first bearing 34, so that the movable blocks 37 on the bidirectional screw 35 will move in the connecting plate 4 along the movable groove 33.

[0044] Preferably, a moving plate 31 is connected to the top surface of the movable block 37. One end of the moving plate 31 extends into a moving groove 32 formed inside the connecting plate 4. And limiting insertion blocks 30 are symmetrically connected to one side surface of the moving plate 31 facing the connecting block 27. The position of the moving groove 32 is communicated with the position of the movable groove 33.

[0045] During specific use, when the movable block 37 moves, the movable block 37 can drive the moving plate 31 to move in the moving groove 32 in the connecting plate 4. In this way, the moving plate 31 can drive the limiting insertion blocks 30 to move, so that the limiting insertion blocks 30 can be inserted into or separated from the limiting grooves 29 on the connecting block 27.

[0046] Preferably, through grooves 38 are symmetrically formed in the top surface of the mounting frame 6. Both side surfaces inside the through grooves 38 are connected with a second bearing 39. A unidirectional screw 40 is connected between the two second bearings 39. One end of the unidirectional screw 40 extends into the mounting frame 6 and is fixedly connected with the output end of the second motor 41. And a slider 42 is threadedly connected through one end of the unidirectional screw 40.

[0047] During specific use, by starting the second motor 41, the output end of the second motor 41 can drive the unidirectional screw 40 to rotate in the second bearing 39, so that the slider 42 on the unidirectional screw 40 can move along the through groove 38 on the mounting frame 6.

[0048] Preferably, the slider 42 passes through the through groove 38 and extends into a positioning groove 43. The positioning grooves 43 are symmetrically formed in the bottom surface of the connecting plate 4. Bolts 44 are connected through both ends of the connecting plate 4. The other end of the bolt 44 passes through the slider 42 and forms a threaded connection with the connecting plate 4.

[0049] During actual use, one end of the slider 42 can slide into the positioning groove 43 at the bottom of the connecting plate 4, and then a bolt 44 is passed through the slider 42 and screwed into the connecting plate 4, so that one end of the slider 42 can be fixed in the positioning groove 43, and the connecting plate 4 and the slider 42 are fixedly connected together. In this way, the slider 42 can drive the connecting plate 4 to move together at one end.

[0050] Preferably, the exhaust fan 13, the first motor 36 and the second motor 41 are electrically connected through a control switch and an external power supply.

[0051] During actual use, the exhaust fan 13, the first motor 36 and the second motor 41 can be controlled through a switch. At the same time, the control switch can start by controlling the two second motors 41, so that the two second motors 41 can run synchronously. The model of the exhaust fan 13 is CX100A industrial exhaust fan. At the same time, the operator can control the wind speed of the exhaust fan 13 through the control switch.

[0052] Working implementation principle: When using the robot arm, first move the base 5 to the designated position of the workpiece to be welded, then place the connecting plate 4 on the base 5, insert the slider 42 on the base 5 into the positioning groove 43 at the bottom of the connecting plate 4, and then use the bolt 44 to penetrate the slider 42 and screw it into the connecting plate 4, so that the position of the connecting plate 4 can be connected with the slider 42. At this time, slide the connecting block 27 at the bottom of the robot body 1 into the connecting groove 28 on the connecting plate 4, and then start the first motor 36, so that the output end of the first motor 36 drives the bidirectional screw 35 to rotate in the first bearing 34, and then the movable block 37 on the bidirectional screw 35 will move along the movable groove 33, and then the movable block 37 will move with the movable plate 31 in the movable groove. The movable plate 31 moves in the movable groove 32, so that the movable plate 31 brings the limiting plug 30 closer to the connecting block 27, so that the limiting plug 30 on the movable plate 31 will slide and insert into the limiting groove 29 on the connecting block 27, so that the position of the connecting block 27 is fixed in the connecting groove 28, so that the manipulator body 1 can be installed on the connecting plate 4, and then one end of the conveying hose 8 is connected to the connecting pipe 10 through a threaded joint, so that the welding host is connected to the manipulator body 1 through a connecting line, and then the control system of the manipulator body 1 is started, and according to the shape, material and welding requirements of the welding workpiece, a suitable welding program is selected and loaded into the control system, and then the coordinate system of the manipulator body 1 is calibrated to ensure that the robot can accurately identify the position of the workpiece. The welding gun 3 of the robot body 1 can be moved to the welding position of the workpiece, and the robot body 1 can be manually operated through the teach pendant to move the welding gun 3 along the trajectory to be welded, and the welding trajectory can be taught, so that the robot body 1 will generate a corresponding welding program according to the recorded trajectory information, and then the robot body 1 is switched to the automatic welding mode, and the robot body 1 will control the welding gun 3 to perform welding operations according to the preset trajectory and parameters. The welding gun 3 will generate smoke when welding, and the exhaust fan 13 is started at this time, so that the exhaust fan 13 absorbs the air in the shell 11 through the pipeline 12, so that the shell 11 can generate suction at the suction hood 7 connected to one end of the conveying hose 8 through the connecting pipe 10, so that the smoke generated by welding can be sucked by the suction hood 7 is adsorbed away, and then transported into the housing 11 through the connecting pipe 10 connected to the delivery hose 8. In this way, when the smoke in the housing 11 circulates, the wire mesh filter element 17 and the activated carbon filter element 18 in the filter box 15 will filter the particulate matter and harmful substances in the smoke, so that the filtered smoke is discharged from the output end of the exhaust fan 13 through the pipeline 12, preventing the smoke from floating in the air without being processed and polluting the working environment, ensuring the health of the operators. Secondly, when the wire mesh filter element 17 and the activated carbon filter element 18 in the filter box 15 need to be maintained, it is only necessary to pull the toggle block 26 to slide in the slide groove 24, so that the toggle block 26 can squeeze the spring 25 in the protrusion 23 with the two movable plug rods 22.One end of the movable insertion rod 22 can be separated from the slot 21 on the filter cartridge 15. At this time, the filter cartridge 15 can be slid out from the placement groove 14 on the housing 11, enabling the operator to complete the disassembly operation of the filter cartridge 15 without tools. The operator can slide out the wire mesh filter element 17 and the activated carbon filter element 18 in the installation groove 16 on the filter cartridge 15 for maintenance and replacement, ensuring the use effect of the wire mesh filter element 17 and the activated carbon filter element 18 and facilitating the maintenance operation of the wire mesh filter element 17 and the activated carbon filter element 18. Secondly, when the operator needs to disassemble and maintain the manipulator body 1, first separate one end of the conveying hose 8 from the connecting pipe 10, and then start the first motor 36. The output end of the first motor 36 drives the bidirectional screw 35 to rotate in the reverse direction. At this time, the movable block 37 on the bidirectional screw 35 drives the limit insertion block 30 on the moving plate 31 to move, so that the limit insertion block 30 can be separated from the limit groove 29 on the connecting block 27. At this time, the connecting block 27 can be separated from the connecting groove 28, enabling the manipulator body 1 to be disassembled from the connecting plate 4 without tools, thus facilitating the maintenance operation of the manipulator body 1. Secondly, start the second motor 41. The output end of the second motor 41 drives the unidirectional screw 40 to rotate, enabling the unidirectional screw 40 to rotate in the second bearing 39. The slider 42 on the unidirectional screw 40 moves left and right along the through groove 38 on the base 5. In this way, the slider 42 drives the connected connecting plate 4 to move, enabling the manipulator body 1 on the connecting plate 4 to move left and right, thereby increasing the working range of the manipulator body 1 and improving the applicability of the manipulator body 1.

[0053] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A robotic arm, comprising a robotic arm body (1), characterized in that: A bracket (2) is provided at one end of the manipulator body (1), a welding gun (3) is connected through the top of the bracket (2), a connecting plate (4) is connected to the bottom surface of the manipulator body (1), a base (5) is connected to the bottom surface of the connecting plate (4), a mounting frame (6) is fixedly connected to the front surface of the bottom end of the bracket (2), a suction hood (7) is connected to the side surface of the mounting frame (6) facing the welding gun (3), one end of the suction hood (7) extends into the mounting frame (6) and is connected to one end of a delivery hose (8), the other end of the delivery hose (8) is connected to a connecting pipe (10) through a threaded joint, and the delivery hose (8) is slidably mounted on the manipulator body (1) through a fixing block (9), and the other end of the connecting pipe (10) extends into the inner surface of the shell (11). The housing (11) is connected to a side surface of the connecting plate (4), and a pipe (12) is connected to the end surface of the housing (11) away from the connecting pipe (10), and the other end of the pipe (12) is connected to the input end of the exhaust fan (13). The exhaust fan (13) is also connected to a side surface of the connecting plate (4). A placement groove (14) is provided on one side surface of the housing (11), and a filter box (15) is slidably placed inside the placement groove (14). A connecting block (27) is connected to the bottom surface of the manipulator body (1), and one end of the connecting block (27) extends into a connecting groove (28) provided on the top surface of the connecting plate (4). Limiting grooves (29) are provided on both side surfaces of the connecting block (27), and limiting plug blocks (30) are slidably inserted inside the limiting grooves (29).

2. A robotic arm according to claim 1, characterized in that: The top surface of the filter box (15) is provided with two groups of installation grooves (16), a wire mesh filter element (17) is slidably placed inside one of the installation grooves (16), and an activated carbon filter element (18) is slidably placed inside the other of the installation grooves (16).

3. A robotic arm according to claim 1, characterized in that: A sealing ring (19) is connected around the outer surface of the front end of the filter box (15), and one end of the sealing ring (19) is engaged in a sealing groove (20) provided on the inner surface of the placement groove (14).

4. A robotic arm according to claim 1, characterized in that: A slot (21) is symmetrically provided on one end surface at the front end of the filter box (15), one end of a movable rod (22) is slidably inserted into the slot (21), the other end of the movable rod (22) is penetrated and connected with a protrusion (23), the protrusion (23) is connected to an end surface inside a slide groove (24), the slide groove (24) is symmetrically provided on one side surface of the filter box (15), and a spring (25) penetrated by the movable rod (22) is provided inside the protrusion (23).

5. A robotic arm according to claim 4, characterized in that: One end of a toggle block (26) is connected inside the slide groove (24), and one end surface of the toggle block (26) facing the protrusion (23) is connected to the movable insertion rod (22).

6. A robotic arm according to claim 1, characterized in that: A movable groove (33) is provided at the middle position of the bottom surface of the connecting plate (4), and first bearings (34) are connected to both side surfaces of the movable groove (33). A bidirectional screw (35) is connected between the two first bearings (34), and one end of the bidirectional screw (35) extends into the connecting plate (4) and is fixedly connected to the output end of the first motor (36), and movable blocks (37) are threadedly connected at both ends of the bidirectional screw (35).

7. A robotic arm according to claim 6, characterized in that: The top surface of the movable block (37) is connected to a movable plate (31), one end of the movable plate (31) extends into a movable groove (32) provided inside the connecting plate (4), and a side surface of the movable plate (31) facing the connecting block (27) is symmetrically connected to a limited position plug block (30), and the position of the movable groove (32) is connected to the position of the movable groove (33).

8. A robotic arm according to claim 1, characterized in that: The top surface of the mounting frame (6) is symmetrically provided with through slots (38), and the inner two side surfaces of the through slots (38) are both connected with second bearings (39), and a one-way screw (40) is connected between the two second bearings (39), and one end of the one-way screw (40) extends into the mounting frame (6) and is fixedly connected to the output end of the second motor (41), and a slider (42) is threadedly connected to one end of the one-way screw (40).

9. A robotic arm according to claim 8, characterized in that: The slider (42) passes through the through groove (38) and extends into the positioning groove (43). The positioning groove (43) is symmetrically arranged on the bottom surface of the connecting plate (4). Bolts (44) are connected through the surfaces of both ends of the connecting plate (4). The other end of the bolt (44) passes through the slider (42) and forms a threaded connection with the connecting plate (4).

10. A robotic arm according to claim 1, characterized in that: The exhaust fan (13), the first motor (36) and the second motor (41) are electrically connected to an external power supply via a control switch.

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