A welding robot

Abstract

The invention provides a robot for welding, belonging to the technical field of welding equipment. The robot for welding comprises a robot arm, a connecting piece and a welding gun. The connecting piece comprises a connecting sleeve installed on the robot arm and a motor assembly located on the outer wall of the connecting sleeve. The welding gun comprises a smoking pipe, an insulating tube and a conductor which are coaxial with each other and are sequentially sleeved from the outside to the inside. One end of the insulating tube is rotatably sleeved in the connecting sleeve and is transmission-connected to the motor assembly. One end of the conductor is fixedly sleeved in the connecting sleeve. An exhaust piece is sleeved on the outer wall of one end of the smoking pipe close to the connecting sleeve. A suction nozzle is fixedly sleeved on the other end of the smoking pipe. A smoking channel is provided between the smoking pipe and the insulating pipe, and impurities such as soot adhered to the outer wall of the insulating tube and the inner wall of the smoking pipe in the smoking channel can be scraped off, thereby avoiding the situation that the smoking channel is blocked due to the impurities of the smoke sticking to the outer wall of the insulating tube and the inner wall of the smoking pipe after the smoke passes through the smoking channel for a long time.

Description

Technical Field

[0001] The invention belongs to the technical field of welding equipment, and in particular relates to a robot for welding. Background Art

[0002] As a basic processing technology for hot processing of metal materials, welding has been widely used in many industrial enterprises such as metallurgy, petrochemical industry, machinery and equipment manufacturing, shipbuilding, etc. However, the welding production process will produce many gases, smoke and other substances that are harmful to physical and mental health. Especially when welding in a small space, the welding smoke concentration value will be as high as 100 mg per cubic meter, and even as high as 800 mg per cubic meter in some improperly ventilated workplaces. Such harsh working conditions pose a serious threat to the physical and mental health of welding workers.

[0003] A Chinese patent with the authorization announcement number CN111168281B discloses a clamping fixed welding gun vacuum cleaner nozzle, including a dust suction unit, including a dust suction part, a telescopic tube, and an exhaust part, the two ends of the telescopic tube are respectively connected to the dust suction part and the exhaust part; an adjustment unit, including an adjustment part, a connecting rod rotatably connected to the adjustment part, and an elastic part sleeved on the telescopic tube, the other end of the connecting rod is connected to the dust suction part; a welding gun, the dust suction part, the telescopic tube, and the exhaust part are sequentially installed on the welding gun, and the adjustment part, the connecting rod, the dust suction part and the welding gun form a crank slider mechanism. When the smoke concentration is high, the dust suction part moves forward, and when the smoke concentration is low, the dust suction part moves backward.

[0004] The existing welding manipulator is provided with a smoking device on the welding gun to absorb the smoke, but the impurities in the smoke will stick to the inner wall of the smoking pipe, which will cause the smoking pipe to be blocked after a long time, thereby affecting the smoking effect. Summary of the invention

[0005] The purpose of the present invention is to provide a welding robot, aiming to solve the problem in the prior art that impurities in the smoke will adhere to the inner wall of the smoking pipe, causing the smoking pipe to be blocked after a long time.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a welding robot, comprising a robot arm, a connecting part and a welding gun, the connecting part comprising a connecting sleeve installed on the robot arm and a motor assembly located on the outer wall of the connecting sleeve, the welding gun comprising a smoking pipe, an insulating tube and a conductor that are coaxial with each other and sequentially sleeved from the outside to the inside, one end of the insulating tube is rotatably sleeved in the connecting sleeve and is transmission connected to the motor assembly, one end of the conductor is fixedly sleeved in the connecting sleeve, an exhaust piece is sleeved on the outer wall of one end of the smoking pipe close to the connecting sleeve, a suction nozzle is fixedly sleeved on the other end of the smoking pipe, and a smoking channel is provided between the smoking pipe and the insulating tube.

[0007] A support plate in contact with the outer wall of the insulating tube is fixedly installed at the end of the suction nozzle away from the smoking tube. A first scraper and a second scraper extending along the axial direction of the smoking tube are provided in the smoking channel. The bottom end of the first scraper is fixedly connected to the support plate and one of its side walls is in contact with the outer wall of the insulating tube. The two side walls of the second scraper are in contact with the first scraper and the inner wall of the smoking tube respectively. The top end of the second scraper is provided with a connecting portion fixedly connected to the outer wall of the insulating tube, and the bottom of the connecting portion is in contact with the top of the first scraper.

[0008] The effect is that, by arranging the first scraper and the second scraper, impurities such as soot adhering to the outer wall of the insulating tube and the inner wall of the smoking tube in the smoking passage can be scraped off under the rotation of the insulating tube, thereby preventing the smoking passage from being blocked due to impurities in the smoke adhering to the outer wall of the insulating tube and the inner wall of the smoking tube after the smoke has passed through the smoking passage for a long time.

[0009] There are multiple support plates, which are evenly distributed along the circumferential direction of the insulating tube, and a smoke inlet channel is formed between two adjacent support plates.

[0010] A connecting flange is provided between the exhaust component and the connecting sleeve. The exhaust component includes an annular sleeve and an air intake pipe. The annular sleeve is fixedly mounted on the connecting sleeve through the connecting flange. An air cavity is provided inside the annular sleeve. The smoking channel is connected to the air cavity. An exhaust port connected to the air cavity is provided on the outer wall of the annular sleeve. One end of the air intake pipe is fixedly mounted in the exhaust port on the outer wall of the annular sleeve, and the other end of the air intake pipe is connected to an external fan.

[0011] The exhaust component also includes a U-shaped partition located in the air cavity and sleeved on the outside of the insulating tube, a support shaft whose axis is parallel to the axis of the smoking tube, and a filter strip. The opening of the U-shaped partition faces the exhaust port and is fixedly connected to the top wall and the bottom wall of the air cavity. The connecting port between the smoking channel and the air cavity is located in the U-shaped groove of the U-shaped partition. There are two support shafts and they are respectively located between two symmetrical U-shaped walls of the U-shaped partition and the inner wall of the air cavity. The filter strip is installed between the two support shafts.

[0012] The effect is that, by setting filter bars and U-shaped partitions, the smoke in the exhaust part can be guided so that the smoke passes through the filter bars, thereby filtering impurities in the smoke, thereby preventing smoke impurities from entering the fan through the intake pipe and being discharged into the air, causing damage to the fan and air pollution.

[0013] The exhaust component also includes two micro motors fixedly mounted on the annular sleeve and a rotating shaft located in the air cavity and with its axis parallel to the axis of the smoking pipe. There are two rotating shafts that are rotatably mounted on both sides of the U-shaped partition. One end of the two rotating shafts rotates through the annular sleeve and is respectively connected to the output shafts of the two micro motors. The two sides of the filter strip respectively bypass the two supporting shafts and are connected to the outer walls of the two rotating shafts.

[0014] The effect is that by setting a rotating shaft, the filter strip can be wound, and by winding the filter strip, the blocked part of the filter strip is rolled away from the opening of the U-shaped partition, thereby ensuring the filtering effect of the filter strip on the flue gas. At the same time, when the entire filter strip is blocked, it is only necessary to open the exhaust piece and replace the new filter strip, thereby ensuring the filtering efficiency and effect of the flue gas.

[0015] An air jet channel is arranged between the insulating tube and the conductor, a gun head is fixedly mounted on one end of the conductor away from the connecting sleeve, and a nozzle sleeved on the outer wall of the gun head is arranged on one end of the insulating tube away from the connecting sleeve.

[0016] The nozzle is a conical tube, and a first guide plate extending along the generatrix of the conical tube and contacting the outer wall of the gun head is fixedly installed on the inner wall of the nozzle. The first guide plate is an arc plate. There are multiple first guide plates and they are evenly distributed along the circumference of the nozzle.

[0017] The effect is that, by setting the nozzle and the first guide plate, the shielding gas can be guided so that the shielding gas can be sprayed evenly to the welding area, thereby protecting the welding area, avoiding the situation where oxygen in the air may enter the welding area due to uneven shielding gas, causing the weld to be oxidized, thereby improving the welding quality and preventing defects such as thermal cracks from occurring in the welding area.

[0018] The outer wall of the nozzle is sleeved with a protective piece, and the protective piece is a conical tube. At least two installation grooves extending along the direction of the cone tube busbar are opened on the outer wall of the nozzle, and the multiple installation grooves are evenly distributed along the circumferential direction of the cone tube. A clamping plate is slidably sleeved in the installation groove, and an elastic piece is fixedly connected between the clamping plate and the bottom of the installation groove. The inner wall of the protective piece is opened with a clamping groove extending along the direction of the cone tube busbar and penetrating the protective piece. The number of the clamping grooves is the same as the installation grooves, and the multiple installation grooves correspond one-to-one to the multiple clamping grooves.

[0019] A protective head is fixedly installed on the outer wall of the end of the protective member away from the suction nozzle. The protective head is a conical tube. The end with a small diameter of the protective head is close to the suction nozzle and fixedly connected to the outer wall of the protective member. A second guide plate extending along the direction of the cone tube busbar is fixedly installed on the outer wall of the protective member. There are multiple second guide plates that are evenly distributed along the circumferential direction of the cone tube. The second guide plates are arc-shaped plates.

[0020] The effect is that by setting up the protective member, the second guide plate on the outer wall of the protective member can guide the gas generated by welding, and introduce the smoke generated by welding into the smoke inlet channel between the two adjacent support plates on the suction nozzle, and enter the smoking channel through the smoke inlet channel. The protective head of the protective member close to one end of the welding area can prevent the protective gas from being sucked into the smoking channel, thereby failing to protect the welding area.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. By setting the first scraper and the second scraper, the soot and other impurities adhering to the outer wall of the insulating tube and the inner wall of the smoking tube in the smoking passage can be scraped off under the rotation of the insulating tube, thereby preventing the smoking passage from being blocked due to the impurities of the smoke adhering to the outer wall of the insulating tube and the inner wall of the smoking tube after the smoke passes through the smoking passage for a long time.

[0023] 2. When the inert shielding gas passes through the jet channel, it will exchange heat with the smoke in the smoke channel, thereby reducing the temperature of the smoke and heating the shielding gas, thereby accelerating the cooling speed of the welding area and improving the welding quality to prevent defects such as thermal cracks in the welding area. The first guide plate on the inner wall of the nozzle guides the shielding gas so that the shielding gas can be evenly sprayed to the welding area.

[0024] 3. The second guide plate on the outer wall of the protective member guides the gas generated by welding, and introduces the smoke generated by welding into the smoke inlet channel between the two adjacent support plates on the suction nozzle, and enters the smoking channel through the smoke inlet channel. The protective head of the protective member close to one end of the welding area can prevent the protective gas from being sucked into the smoking channel, thereby failing to protect the welding area. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor. In the drawings:

[0026] Figure 1 It is a structural schematic diagram of the welding robot in the present invention;

[0027] Figure 2 It is a schematic diagram of the installation structure of the welding gun in the present invention;

[0028] Figure 3 It is a schematic diagram of the local explosion structure of the welding gun installation in the present invention;

[0029] Figure 4 It is a structural schematic diagram of the welding gun in the present invention;

[0030] Figure 5 It is a schematic diagram of the installation structure of the welding gun suction nozzle in the present invention;

[0031] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0032] Figure 7 It is a top cross-sectional schematic diagram of the exhaust member in the present invention;

[0033] Figure 8 It is a schematic diagram of the local structure of the welding gun in the present invention;

[0034] Fig. 9 It is a schematic diagram of the structure of the welding gun suction nozzle in the present invention;

[0035] Fig.10 It is a schematic diagram of the installation structure of the first scraper and the second scraper in the present invention.

[0036] In the figure: 1, mechanical arm; 2, connecting piece; 21, connecting sleeve; 22, motor assembly; 3, welding gun; 31, smoking pipe; 32, exhaust piece; 321, annular sleeve; 322, air cavity; 323, exhaust port; 324, suction pipe; 325, micro motor; 326, U-shaped partition; 327, support shaft; 328, rotating shaft; 329, filter strip; 33, insulating tube; 331, nozzle; 332, mounting groove; 333, the clamping plate; 334, the elastic member; 335, the first guide plate; 336, the transmission gear; 34, the conductor; 341, the gun head; 35, the suction nozzle; 351, the support plate; 352, the first scraper; 353, the second scraper; 3531, the connecting part; 36, the protective member; 361, the clamping groove; 362, the second guide plate; 363, the protective head; 37, the jet channel; 38, the smoking channel; 39, the connecting flange. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0040] See also Figure 1-Figure 9 The present invention provides the following technical solution: a welding robot comprises a robot arm 1, a connecting part 2 and a welding gun 3.

[0041] refer to Figure 1-Figure 3 As shown, the connecting member 2 includes a connecting sleeve 21 installed on the robot arm 1 and a motor assembly 22 located on the connecting sleeve 21 .

[0042] The motor assembly 22 includes a motor fixedly mounted on the outer wall of the connecting sleeve 21 , and the output shaft of the motor rotates and extends into the connecting sleeve 21 and is equipped with a gear.

[0043] refer to Figure 3 and Figure 4 As shown, the welding gun 3 includes a smoking pipe 31, an insulating tube 33, a conductor 34, and a suction nozzle 35 and a protective member 36 located at the end of the insulating tube 33 away from the connecting sleeve 21, which are coaxial with each other and are sequentially sleeved from the outside to the inside. An air jet channel 37 is provided between the inner wall of the insulating tube 33 and the outer wall of the conductor 34, and a smoking channel 38 is provided between the inner wall of the smoking pipe 31 and the outer wall of the insulating tube 33.

[0044] When the inert shielding gas passes through the jet channel 37, it will exchange heat with the smoke in the smoking channel 38, thereby reducing the temperature of the smoke and heating the shielding gas, making the shielding gas more active, thereby more effectively isolating the oxygen and other harmful gases in the air, preventing the metal from being oxidized and nitrided during welding or heat treatment, thereby improving the welding quality and preventing defects such as thermal cracks from occurring in the welding area.

[0045] An exhaust member 32 is sleeved on the outer wall of one end of the smoking pipe 31 close to the connecting sleeve 21 , and a connecting flange 39 is provided between the exhaust member 32 and the connecting sleeve 21 .

[0046] refer to Figure 3 , Figure 4 and Figure 7 As shown, the exhaust member 32 includes an annular sleeve 321 , an air suction pipe 324 , a micro motor 325 , a U-shaped partition 326 located in the air cavity 322 , a support shaft 327 , a rotating shaft 328 located in the air cavity 322 , and a filter bar 329 .

[0047] The annular sleeve 321 is fixedly mounted on the connecting sleeve 21 via a connecting flange 39 . An air cavity 322 is provided inside the annular sleeve 321 . The smoking channel 38 is connected to the air cavity 322 . An exhaust port 323 connected to the air cavity 322 is provided on the outer wall of the annular sleeve 321 .

[0048] One end of the air intake pipe 324 is fixedly installed in the exhaust port 323 located on the outer wall of the annular sleeve 321, and the other end of the air intake pipe 324 is connected to an external fan.

[0049] There are two micro motors 325 and both are fixedly mounted on the annular sleeve 321 .

[0050] The U-shaped partition 326 is sleeved on the outside of the insulating tube 33, and the opening of the U-shaped partition 326 faces the exhaust port 323. The U-shaped partition 326 is fixedly connected to the top wall and the bottom wall of the air cavity 322, and the connecting port between the smoking channel 38 and the air cavity 322 is located in the U-shaped groove of the U-shaped partition 326.

[0051] The axis of the support shaft 327 is parallel to the axis of the smoking pipe 31 . There are two support shafts 327 , which are respectively located between two symmetrical U-shaped walls of the U-shaped partition 326 and the inner wall of the air cavity 322 .

[0052] The axis of the rotating shaft 328 is parallel to the axis of the smoking pipe 31. There are two rotating shafts 328 and they are respectively located on both sides of the U-shaped partition 326. The two ends of the rotating shaft 328 are respectively rotatably installed on the top wall and the bottom wall of the air cavity 322. One end of the two rotating shafts 328 rotates through the annular sleeve 321 and is respectively connected to the output shafts of the two micro motors 325. Specifically, they can be connected through a coupling, or one end of one of the rotating shafts 328 can be directly welded to the output shaft of the micro motor 325.

[0053] Both sides of the filter bar 329 pass around the two support shafts 327 and are connected to the outer walls of the two rotating shafts 328 .

[0054] The micro motor 325 drives the rotating shaft 328 connected to it to rotate, thereby driving the filter strip 329 from another rotating shaft 328 through the opening of the U-shaped partition 326 and winding it onto the rotating shaft 328 connected to the output shaft of the micro motor 325. Then, when the portion of the filter strip 329 located at the opening of the U-shaped partition 326 is blocked after a long period of filtration, the filter strip 329 can be wound so that the blocked portion of the filter strip 329 is rolled away from the opening of the U-shaped partition 326, thereby ensuring the filtering effect of the filter strip 329 on the smoke. At the same time, when the entire filter strip 329 is blocked, it is only necessary to open the exhaust piece 32 and replace the new filter strip 329.

[0055] refer to Figure 3 , Figure 5 and Figure 6 As shown, one end of the insulating tube 33 is rotatably sleeved in the connecting sleeve 21 and is transmission-connected to the motor assembly 22, and the other end of the insulating tube 33 is provided with a nozzle 331. A transmission tooth 336 is fixedly installed on the outer wall of one end of the insulating tube 33 extending into the connecting sleeve 21, and the gear of the motor assembly 22 is meshed with the transmission tooth 336 for transmission.

[0056] The nozzle 331 is a conical tube, and a first guide plate 335 extending along the generatrix direction of the conical tube is fixedly installed on the inner wall of the nozzle 331. The first guide plate 335 is an arc-shaped plate. There are multiple first guide plates 335 and they are evenly distributed along the circumferential direction of the nozzle 331. At least two installation grooves 332 extending along the generatrix direction of the conical tube are opened on the outer wall of the nozzle 331. The multiple installation grooves 332 are evenly distributed along the circumferential direction of the conical tube. A clamping plate 333 is slidably sleeved in the installation groove 332, and an elastic member 334 is fixedly connected between the clamping plate 333 and the bottom of the installation groove 332.

[0057] refer to Figure 3 and Figure 5 As shown, one end of the conductor 34 is fixedly sleeved in the connecting sleeve 21, and the other end of the conductor 34 is fixedly installed with a gun head 341, the gun head 341 is a cone, the nozzle 331 is sleeved on the outside of the gun head 341, and the first guide plate 335 is in contact with the outer wall of the gun head 341.

[0058] refer to Figure 5 , Figure 6 , Figure 8 and Fig. 9 As shown, the suction nozzle 35 is fixedly installed on the end of the smoking pipe 31 away from the connecting sleeve 21, and a support plate 351 in contact with the outer wall of the insulating tube 33 is fixedly installed on the end of the suction nozzle 35 away from the smoking pipe 31. A first scraper 352 and a second scraper 353 extending along the axial direction of the smoking pipe 31 are provided in the smoking channel 38. The bottom end of the first scraper 352 is fixedly connected to the support plate 351 and one of its side walls is in contact with the outer wall of the insulating tube 33. The two side walls of the second scraper 353 are in contact with the first scraper 352 and the inner wall of the smoking pipe 31 respectively. The top of the second scraper 353 is provided with a connecting portion 3531 fixedly connected to the outer wall of the insulating tube 33, and the bottom of the connecting portion 3531 is in contact with the top of the first scraper 352.

[0059] There are multiple support plates 351 , and the multiple support plates 351 are evenly distributed along the circumferential direction of the insulating tube 33 , and a smoke inlet channel is formed between two adjacent support plates 351 .

[0060] As the insulating tube 33 and the second scraper 353 rotate, the first scraper 352 scrapes the outer wall of the insulating tube 33, and the second scraper 353 scrapes the inner wall of the smoking pipe 31, so that impurities such as soot that adhere to the outer wall of the insulating tube 33 and the inner wall of the smoking pipe 31 due to the smoke passing through the smoking channel 38 can be scraped off, and the scraped impurities are sucked into the air cavity 322 through negative pressure and filtered out by the filter strip 329, thereby preventing the smoking channel 38 from being blocked due to the impurities of the smoke sticking to the outer wall of the insulating tube 33 and the inner wall of the smoking pipe 31 after the smoke passes through the smoking channel 38 for a long time.

[0061] refer to Figure 5 , Figure 8 and Fig. 9 As shown, the protective member 36 is a conical tube and is sleeved on the outer wall of the nozzle 331. The inner wall of the protective member 36 is provided with a card slot 361 extending along the generatrix direction of the conical tube and penetrating the protective member 36. The number of the card slots 361 is the same as the mounting slots 332, and the plurality of mounting slots 332 correspond to the plurality of card slots 361 one by one. The card plate 333 is clamped in the mounting slot 332. A protective head 363 is fixedly installed on the outer wall of the end of the protective member 36 away from the suction nozzle 35. The protective head 363 is a conical tube. The end of the protective head 363 with a small diameter is close to the suction nozzle 35 and fixedly connected to the outer wall of the protective member 36. A second guide plate 362 extending along the generatrix direction of the conical tube is fixedly installed on the outer wall of the protective member 36. There are a plurality of second guide plates 362 and they are evenly distributed along the circumferential direction of the conical tube. The second guide plate 362 is an arc plate.

[0062] As the insulating tube 33 rotates, the nozzle 331 and the protective member 36 rotate synchronously with the insulating tube 33. The first guide plate 335 on the inner wall of the nozzle 331 guides the shielding gas so that the shielding gas can be evenly sprayed toward the welding area. At the same time, the second guide plate 362 on the outer wall of the protective member 36 guides the gas generated by welding, and guides the smoke generated by welding into the smoke inlet channel between the two adjacent support plates 351 on the suction nozzle 35, and enters the smoking channel 38 through the smoke inlet channel. The protective head 363 of the protective member 36 close to one end of the welding area can prevent the shielding gas from being sucked into the smoking channel 38, thereby failing to protect the welding area.

[0063] The implementation principle of the embodiment of the present invention is as follows: when the welding manipulator is working, the manipulator arm 1 is controlled to move the gun head 341 of the welding gun 3 to the place to be welded, and the welding gun 3 is started for welding. At the same time, the fan is started, and the fan continuously extracts the air in the air cavity 322 through the suction pipe 324, so that a negative pressure is formed in the air cavity 322. At this time, the smoke formed by welding enters the smoking channel 38 from the smoke inlet channel between the two adjacent support plates 351 on the suction nozzle 35 under the action of the negative pressure of the air cavity 322, and enters the air cavity 322 from the smoking channel 38. Due to the obstruction of the U-shaped partition 326, the smoke can only pass through the filter strip 329 at the opening of the U-shaped partition 326, and then enter the suction pipe 324. At this time, the filter strip 329 filters the smoke.

[0064] Start the micro motor 325 to drive the rotating shaft 328 connected to it to rotate, thereby driving the filter strip 329 from another rotating shaft 328 through the opening of the U-shaped partition 326 and winding it onto the rotating shaft 328 connected to the output shaft of the micro motor 325. Then, when the portion of the filter strip 329 located at the opening of the U-shaped partition 326 is blocked after a long period of filtration, the filter strip 329 can be wound so that the blocked portion of the filter strip 329 is rolled away from the opening of the U-shaped partition 326, thereby ensuring the filtering effect of the filter strip 329 on the smoke. At the same time, when the entire filter strip 329 is blocked, it is only necessary to open the exhaust component 32 and replace the new filter strip 329.

[0065] When the welding manipulator is working, the motor assembly 22 is started synchronously to drive the insulating tube 33 to rotate. Since the top of the second scraper 353 is fixedly connected to the outer wall of the insulating tube 33, the second scraper 353 rotates together with the insulating tube 33. The side wall of the second scraper 353 contacts the inner wall of the smoking tube 31. The first scraper 352 is located between the second scraper 353 and the outer wall of the insulating tube 33 and the first scraper 352 contacts the outer wall of the insulating tube 33. The bottom of the first scraper 352 is fixed on the support plate 351. As the insulating tube 33 and the second scraper 353 rotate, The first scraper 352 scrapes the outer wall of the insulating tube 33, and the second scraper 353 scrapes the inner wall of the smoking pipe 31, so as to scrape off impurities such as soot that adhere to the outer wall of the insulating tube 33 and the inner wall of the smoking pipe 31 due to the smoke passing through the smoking channel 38, and the scraped impurities are sucked into the air cavity 322 through negative pressure and filtered out by the filter strip 329, thereby preventing the smoking channel 38 from being blocked due to the impurities of the smoke sticking to the outer wall of the insulating tube 33 and the inner wall of the smoking pipe 31 after the smoke passes through the smoking channel 38 for a long time.

[0066] Before the welding robot works, the protective part 36 is sleeved on the nozzle 331 so that the clamping plate 333 on the nozzle 331 is inserted into the clamping groove 361 on the protective part 36, thereby fixing the protective part 36. During welding, the inert shielding gas is introduced into the jet channel 37 and sprayed toward the welding point through the nozzle 331, thereby effectively reducing the influence of air on the welding metal and preventing the formation of oxides, thereby improving the welding quality and stability. When passing through the jet channel 37, the inert shielding gas will exchange heat with the flue gas in the smoking channel 38, thereby reducing the temperature of the flue gas and heating the shielding gas, thereby accelerating the cooling speed of the welding area and improving the welding quality to prevent defects such as thermal cracks in the welding area. As the insulating tube 33 rotates, the nozzle 331 and the protective member 36 rotate synchronously with the insulating tube 33. The first guide plate 335 on the inner wall of the nozzle 331 guides the shielding gas so that the shielding gas can be evenly sprayed toward the welding area. At the same time, the second guide plate 362 on the outer wall of the protective member 36 guides the gas generated by welding, and guides the smoke generated by welding into the smoke inlet channel between the two adjacent support plates 351 on the suction nozzle 35, and enters the smoking channel 38 through the smoke inlet channel. The protective head 363 of the protective member 36 close to one end of the welding area can prevent the shielding gas from being sucked into the smoking channel 38, thereby failing to protect the welding area.

[0067] Although only embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape, and parameter values ​​of various elements, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be changed or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to a specific embodiment, but extends to a variety of modifications that still fall within the scope of the appended claims.

[0068] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0069] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A welding robot, comprising a robot arm (1), a connecting piece (2) and a welding gun (3), wherein the connecting piece (2) comprises a connecting sleeve (21) mounted on the robot arm (1) and a motor assembly (22) located on an outer wall of the connecting sleeve (21), characterized in that: The welding gun (3) comprises a smoking pipe (31), an insulating pipe (33) and a conductor (34) which are coaxial with each other and are sleeved in sequence from the outside to the inside. One end of the insulating pipe (33) is rotatably sleeved in the connecting sleeve (21) and is drivingly connected to the motor assembly (22). One end of the conductor (34) is fixedly sleeved in the connecting sleeve (21). An exhaust member (32) is sleeved on the outer wall of one end of the smoking pipe (31) close to the connecting sleeve (21). A suction nozzle (35) is fixedly sleeved on the other end of the smoking pipe (31). A smoking passage (38) is provided between the smoking pipe (31) and the insulating pipe (33). A support plate (351) in contact with the outer wall of the insulating tube (33) is fixedly mounted on one end of the suction nozzle (35) away from the smoking tube (31); a first scraper (352) and a second scraper (353) extending along the axial direction of the smoking tube (31) are provided in the smoking passage (38); the bottom end of the first scraper (352) is fixedly connected to the support plate (351) and one of its side walls is in contact with the outer wall of the insulating tube (33); two side walls of the second scraper (353) are in contact with the first scraper (352) and the inner wall of the smoking tube (31) respectively; and a connecting portion (3531) fixedly connected to the outer wall of the insulating tube (33) is provided at the top end of the second scraper (353).

2. A welding robot according to claim 1, characterized in that: There are a plurality of support plates (351), and the plurality of support plates (351) are evenly distributed along the circumferential direction of the insulating tube (33), and a smoke inlet channel is formed between two adjacent support plates (351).

3. A welding robot according to claim 1, characterized in that: A connecting flange (39) is provided between the exhaust member (32) and the connecting sleeve (21). The exhaust member (32) comprises an annular sleeve (321) and an air intake pipe (324). The annular sleeve (321) is fixedly mounted on the connecting sleeve (21) via the connecting flange (39). An air cavity (322) is provided inside the annular sleeve (321). The smoking passage (38) is communicated with the air cavity (322). An exhaust port (323) communicated with the air cavity (322) is provided on the outer wall of the annular sleeve (321). One end of the air intake pipe (324) is fixedly mounted inside the exhaust port (323) located on the outer wall of the annular sleeve (321). The other end of the air intake pipe (324) is communicated with an external fan.

4. A welding robot according to claim 3, characterized in that: The exhaust member (32) further comprises a U-shaped partition (326) located in the air cavity (322) and sleeved on the outside of the insulating tube (33), a support shaft (327) whose axis is parallel to the axis of the smoking tube (31), and a filter strip (329); the opening of the U-shaped partition (326) faces the exhaust port (323) and is fixedly connected to the top wall and the bottom wall of the air cavity (322); the communication port between the smoking channel (38) and the air cavity (322) is located in the U-shaped groove of the U-shaped partition (326); there are two support shafts (327) and they are respectively located between two symmetrical U-shaped walls of the U-shaped partition (326) and the inner wall of the air cavity (322); and the filter strip (329) is installed between the two support shafts (327).

5. A welding robot according to claim 4, characterized in that: The exhaust member (32) further comprises two micro motors (325) fixedly mounted on the annular sleeve (321) and a rotating shaft (328) located in the air cavity (322) and having an axis parallel to the axis of the smoking pipe (31). There are two rotating shafts (328) which are rotatably mounted on both sides of the U-shaped partition (326). One end of each of the two rotating shafts (328) rotates through the annular sleeve (321) and is respectively connected to the output shafts of the two micro motors (325). Both sides of the filter strip (329) respectively bypass the two supporting shafts (327) and are connected to the outer walls of the two rotating shafts (328).

6. A welding robot according to claim 1, characterized in that: An air jet channel (37) is provided between the insulating tube (33) and the conductor (34); a gun head (341) is fixedly mounted on one end of the conductor (34) away from the connecting sleeve (21); and a nozzle (331) is provided on the outer wall of the gun head (341) on the one end of the insulating tube (33) away from the connecting sleeve (21).

7. A welding robot according to claim 6, characterized in that: The nozzle (331) is a conical tube, and a first guide plate (335) extending along the generatrix direction of the conical tube and in contact with the outer wall of the gun head (341) is fixedly mounted on the inner wall of the nozzle (331), and the first guide plate (335) is an arc-shaped plate, and there are a plurality of the first guide plates (335) which are evenly distributed along the circumferential direction of the nozzle (331).

8. A welding robot according to claim 6, characterized in that: The outer wall of the nozzle (331) is sleeved with a protective member (36), the protective member (36) being a conical tube, the outer wall of the nozzle (331) being provided with at least two mounting grooves (332) both extending in the direction of the generatrix of the conical tube, the plurality of mounting grooves (332) being evenly distributed in the circumferential direction of the conical tube, a clamping plate (333) being slidably sleeved in the mounting groove (332), an elastic member (334) being fixedly connected between the clamping plate (333) and the bottom of the mounting groove (332), the inner wall of the protective member (36) being provided with a clamping groove (361) extending in the direction of the generatrix of the conical tube and penetrating the protective member (36), the number of the clamping grooves (361) being the same as the number of the mounting grooves (332), and the plurality of mounting grooves (332) corresponding to the plurality of clamping grooves (361) respectively.

9. A welding robot according to claim 8, characterized in that: A protective head (363) is fixedly mounted on the outer wall of one end of the protective member (36) away from the suction nozzle (35); the protective head (363) is a conical tube; an end of the protective head (363) with a smaller diameter is close to the suction nozzle (35) and is fixedly connected to the outer wall of the protective member (36); a second guide plate (362) extending along the generatrix direction of the conical tube is fixedly mounted on the outer wall of the protective member (36); a plurality of the second guide plates (362) are evenly distributed along the circumferential direction of the conical tube; and the second guide plates (362) are arc-shaped plates.

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