Automatic welding device for elevator shell

Abstract

The invention discloses an automatic welding device for an elevator shell, and belongs to the technical field of welding equipment.The automatic welding device comprises a welding table and a mechanical arm, a moving frame is installed on the mechanical arm, a welding gun and a protective sleeve are installed on the moving frame, the protective sleeve is arranged on the periphery of the welding gun in a sleeving mode, and an air inlet ring is arranged on the protective sleeve; a gas inlet ring is installed on the outer circumferential face of the welding gun, a gas conveying pipe is connected to the outer circumferential face of the gas inlet ring, a gas pump is arranged on the gas conveying pipe, the other end of the gas conveying pipe is connected with a gas storage system, a plurality of gas outlet pipes are installed on the inner circumferential face of the gas inlet ring and arranged at equal intervals in the circumferential direction of the gas inlet ring, and gas outlets of the gas outlet pipes face the welding gun. It can be guaranteed that the welding area is always in the stable protective atmosphere, and the welding quality is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of welding equipment, and in particular to an automatic welding device for elevator housings. Background Technology

[0002] As an important piece of equipment in modern construction and industry, elevators are widely used in high-rise buildings, factories, warehouses, and other locations. With the continuous development of construction and engineering machinery, the performance and safety requirements for elevators are becoming increasingly stringent. The elevator's outer shell, as one of its core components, serves multiple functions including load-bearing, protection, and decoration; therefore, its quality requirements are also extremely stringent.

[0003] During the production of the elevator shell, welding is required. Inert gas is introduced into the welding area during the welding process. Usually, nozzles are used to introduce inert gas into the welding area. However, the inert gas may be unevenly distributed, which can easily affect the welding quality. Summary of the Invention

[0004] To address the issue of uneven inert gas distribution affecting welding quality, this application provides an automatic welding device for elevator housings.

[0005] The automatic welding device for elevator shell provided in this application adopts the following technical solution: An automatic welding device for elevator shells includes a welding table and a robotic arm. A movable frame is mounted on the robotic arm, and a welding torch and a protective sleeve are mounted on the movable frame. The protective sleeve is fitted around the outer periphery of the welding torch. An air inlet ring is provided on the protective sleeve, and an air supply pipe is connected to the outer peripheral surface of the air inlet ring. An air pump is provided on the air supply pipe, and the other end of the air supply pipe is connected to an air storage system. A plurality of air outlet pipes are installed on the inner peripheral surface of the air inlet ring. The plurality of air outlet pipes are arranged at equal intervals along the circumference of the air inlet ring, and the air outlets of the air outlet pipes face the welding torch.

[0006] By adopting the above technical solution, the air pump is started, and inert gas enters the air intake ring through the air supply pipe, and then is sprayed to the welding area through several air outlet pipes. The inert gas fully covers the welding area and is evenly distributed, ensuring that the welding area is always in a stable protective atmosphere, thereby ensuring the welding quality.

[0007] Preferably, the movable frame includes a movable block, a telescopic rod and a fixing ring are fixed to the bottom surface of the movable block, a connecting plate is rotatably installed at the bottom end of the telescopic rod, the other end of the connecting plate is fixedly connected to the outer peripheral surface of the protective sleeve, the fixing ring is located at the top of the welding torch, the welding torch is located at the central axis of the fixing ring, the protective sleeve can be fitted onto the outer periphery of the fixing ring, the outer periphery of the fixing ring has a slot, the fixing ring slides radially along its own slot to install a locking block, and the inner peripheral surface of the protective sleeve has a locking groove for inserting the locking block.

[0008] By adopting the above technical solution, the anti-slip sleeve is rotated so that the protective sleeve is located at the bottom of the fixed ring. Then, the protective sleeve is moved upward and placed on the outer circumference of the fixed ring. The locking block is then inserted into the locking groove so that the protective sleeve and the fixed ring are locked together and fixed. The protective sleeve and the fixed ring are coaxially arranged, and the welding gun is located inside the protective sleeve so that the gas outlet pipe on the protective sleeve can deliver inert gas to the welding area of ​​the welding gun when it is working.

[0009] Preferably, a spring is fixed to the end face of the locking block away from the protective sleeve, and the end of the spring away from the locking block is fixedly connected to the inner wall of the locking groove. An inclined surface is provided on the side of the locking block near the protective sleeve, and the inclined surface is located on the bottom surface of the locking block.

[0010] By adopting the above technical solution, the protective sleeve is moved upward from the bottom of the welding gun, so that the protective sleeve is fitted on the outer circumference of the fixed ring. The protective sleeve abuts against the inclined surface, so that the locking block enters the locking groove. The spring is in a compressed state. Then the locking block is aligned with the locking groove. Under the elastic force of the spring, the locking block is inserted into the locking groove, so as to realize the locking and fixing of the protective sleeve and the fixed ring.

[0011] Preferably, the outer circumferential surface of the protective sleeve is provided with an abutment groove that communicates with the snap-fit ​​groove. An abutment block is installed on the protective sleeve by sliding along its own radial direction through the abutment groove. A slider is fixed on the side of the abutment block. A sliding groove is provided on the inner wall of the abutment groove. The slider slides and engages with the protective sleeve along the radial direction of the protective sleeve through the sliding groove. A second spring is fixed on the side of the slider away from the snap-fit ​​block. The end of the second spring away from the slider is fixedly connected to the sliding groove.

[0012] By adopting the above technical solution, the abutment block does not contact the locking block under the elastic force of spring two. When it is necessary to disassemble the protective sleeve, the abutment block is pressed towards the locking block, so that the abutment block contacts the locking block and pushes the locking block to move, so that the locking block disengages from the locking groove, making it easier to disassemble the protective sleeve.

[0013] Preferably, the outer circumferential surface of the protective sleeve is provided with an annular groove, the air inlet ring is fixed in the annular groove, the air outlet pipe includes a corrugated pipe and a nozzle, the inner circumferential surface of the protective sleeve is provided with a plurality of through holes for the nozzle to pass through, one end of the corrugated pipe is fixedly connected to the air inlet ring, the other end of the corrugated pipe is fixedly connected to the nozzle, a movable circular plate is fixedly fitted on the outer circumferential surface of the nozzle, the inner circumferential surface of the annular groove is provided with a plurality of movable grooves, the movable circular plate slides and engages with the protective sleeve radially along the protective sleeve through the movable grooves, and the protective sleeve is provided with a pusher for pushing the movable circular plate toward the direction of the welding torch.

[0014] By adopting the above technical solution, the nozzle is driven to move radially along the air intake ring by the pusher, so as to change the distance between the nozzle and the welding gun. This allows the coverage and density of the inert gas to be adjusted according to the different thicknesses of the workpiece or the welding requirements, thereby improving the welding effect.

[0015] Preferably, a spring three is sleeved on the outer circumferential surface of the bellows, one end of the spring three is fixedly connected to the inner circumferential surface of the air intake ring, and the other end of the spring three is fixedly connected to the side surface of the movable circular plate.

[0016] By adopting the above technical solution, when the pusher moves the moving circular plate toward the direction closer to the welding gun, the third spring is in a stretched state. When the moving circular plate is not acted upon by the pusher, the moving circular plate moves toward the direction away from the welding gun under the elastic force of the third spring, thereby realizing the adjustment of the distance between the nozzle and the welding gun.

[0017] Preferably, a moving rod is fixed to the side of the movable circular plate away from the welding gun. A through hole two communicating with the moving groove is opened on the outer peripheral surface of the protective sleeve. The moving rod slides and engages with the protective sleeve radially through the through hole two. The pushing member includes a pushing ring sleeved on the outer periphery of the protective sleeve. A plurality of pushing blocks are fixed on the bottom surface of the pushing ring. An inclined surface three is provided on the bottom surface of the pushing block. The inclined surface three is located on the side of the pushing block closer to the moving rod. The end of the moving rod can abut against the inclined surface three.

[0018] By adopting the above technical solution, the pushing ring moves downward, and the pushing ring drives several pushing blocks to move downward synchronously. The pushing blocks move the moving rod towards the direction of the welding gun through the inclined plane, and the moving rod drives the nozzle towards the direction of the welding gun through the moving circular plate.

[0019] Preferably, a limiting block is fixed on the inner circumferential surface of the pushing ring, and a limiting groove is formed on the outer circumferential surface of the protective sleeve. The limiting block slides and engages with the protective sleeve vertically through the limiting groove. A positioning screw is passed through the outer circumferential surface of the pushing ring. The positioning screw is threadedly connected to the pushing ring, and the end of the positioning screw can abut against the outer circumferential surface of the protective sleeve.

[0020] By adopting the above technical solution, the push ring is moved vertically to adjust the position of the nozzle. After the adjustment is completed, the positioning screw is tightened so that the end of the positioning screw is in close contact with the outer circumferential surface of the protective sleeve, thereby fixing the push ring and the protective sleeve together.

[0021] Preferably, the welding table includes two vertically arranged fixed plates, rotating plates are rotatably mounted on the opposite inner sides of the two fixed plates, and a horizontally arranged mounting plate is fixed between the two rotating plates. Two sets of symmetrically arranged support members are mounted on the top surface of the mounting plate. The support members include a support base and a support plate for placing the workpiece. A backing plate for abutting against the side of the workpiece is provided on the top surface of the mounting plate. A cylinder is mounted on the top surface of the support plate. A gripper for clamping the workpiece is installed at the piston rod end of the cylinder. The cylinder is located above the support plate.

[0022] By adopting the above technical solution, the workpiece is placed on the support base and support plate, and the support plate abuts against the workpiece, thereby limiting and supporting the workpiece to improve the stability of the workpiece during welding. Then, the workpiece is clamped and fixed by the cylinder and the air gripper so that the welding gun can weld the workpiece. The rotating plate drives the mounting plate to rotate, which, in conjunction with the movement of the robotic arm, allows the welding gun to weld different positions of the workpiece.

[0023] In summary, this application includes at least one of the following beneficial technical effects: Start the air pump, and inert gas enters the air intake ring through the air supply pipe, and then is sprayed to the welding area through several air outlet pipes. The inert gas fully covers the welding area and is evenly distributed, ensuring that the welding area is always in a stable protective atmosphere, thereby ensuring the welding quality. Rotate the anti-slip sleeve so that the protective sleeve is at the bottom of the fixed ring. Then move the protective sleeve upward and put it on the outer circumference of the fixed ring. Then insert the locking block into the locking groove so that the protective sleeve and the fixed ring are locked and fixed. The protective sleeve and the fixed ring are coaxially set, and the welding gun is located inside the protective sleeve so that the gas outlet pipe on the protective sleeve can deliver inert gas to the welding area of ​​the welding gun when it is working. By using a pusher to move the nozzle radially along the air intake ring, the distance between the nozzle and the welding torch can be changed. This allows for adjustment of the coverage and density of the inert gas according to the different thicknesses of the workpiece or welding requirements, thereby improving the welding effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the automatic welding device for the elevator shell according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the support component in the automatic welding device for the elevator shell according to an embodiment of this application.

[0026] Figure 3 This is a schematic diagram of the moving frame in the automatic welding device for the elevator shell according to an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the structure of the protective sleeve and the fixing ring in the automatic welding device for the elevator shell according to an embodiment of this application.

[0028] Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0029] Figure 6 This is a cross-sectional view of the protective sleeve in the automatic welding device for the elevator housing according to an embodiment of this application.

[0030] Reference numerals: 1. Welding table; 11. Fixed plate; 12. Rotating plate; 13. Mounting plate; 14. Support component; 141. Support base; 142. Support plate; 143. Backing plate; 144. Cylinder; 145. Pneumatic gripper; 2. Robotic arm; 21. Moving frame; 211. Moving block; 212. Fixed ring; 22. Welding torch; 23. Telescopic rod; 24. Connecting plate; 3. Protective sleeve; 31. Snap-fit ​​groove; 32. Abutment block; 33. Abutment groove; 34. Slider; 35. Slide groove; 36. Spring 2; 37. Annular groove; 38. Through hole 1; 39. Through hole 2; 4. Locking block; 41. Locking groove; 42. Spring 1; 43. Inclined surface 1; 5. Inlet ring; 51. Air supply pipe; 52. Air pump; 53. Outlet pipe; 531. Corrugated pipe; 532. Nozzle; 54. Moving circular plate; 55. Moving groove; 56. Spring 3; 57. Moving rod; 6. Pushing ring; 61. Pushing block; 62. Inclined surface 3; 63. Limiting block; 64. Limiting groove; 65. Positioning screw. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0032] This application discloses an automatic welding device for elevator shells.

[0033] Reference Figure 1 and Figure 2The automatic welding device for the elevator shell includes a welding table 1 and a robotic arm 2, with the robotic arm 2 located on one side of the welding table 1. A movable frame 21 is mounted on the robotic arm 2, and a welding torch 22 for welding workpieces is mounted on the movable frame 21. The welding table 1 includes two vertically arranged fixed plates 11, with rotating plates 12 rotatably mounted on their respective inner sides. A horizontally arranged mounting plate 13 is fixed between the two rotating plates 12, and two symmetrically arranged sets of support members 14 are mounted on the top surface of the mounting plate 13. The support members 14 include two support seats 141, two support plates 142, and two backing plates 143. The two support seats 141 and the two backing plates 143 are located on opposite sides of the top surface of the mounting plate 13, and the two support plates 142 are located on the side of the mounting plate 13 closest to the rotating plates 12. Two cylinders 144 are mounted on the top surface of the support plates 142, with the cylinders 144 located above the support plates 142. A gripper 145 for clamping workpieces is mounted on the piston rod end of the cylinders 144.

[0034] The workpiece is placed on the support base 141 and support plate 142, with the abutment plate 143 abutting against the workpiece to limit and support it, thereby improving the stability of the workpiece during welding. Then, the workpiece is clamped and fixed by the cylinder 144 and the pneumatic gripper 145 so that the welding torch 22 can weld the workpiece. The rotating disk drives the mounting plate 13 to rotate, which, in conjunction with the movement of the robotic arm 2, allows the welding torch 22 to weld different positions of the workpiece. Reference Figure 3 The movable frame 21 includes a movable block 211, on the bottom surface of which a telescopic rod 23 and a fixing ring 212 are fixed. The fixing ring 212 is located at the top of the welding torch 22, and the welding torch 22 is located at the central axis of the fixing ring 212. A connecting plate 24 is rotatably mounted at the bottom end of the telescopic rod 23, and a protective sleeve 3 is fixed at the other end of the connecting plate 24. The protective sleeve 3 can be fitted onto the outer circumference of the fixing ring 212.

[0035] Reference Figure 4 and Figure 5 The outer circumference of the fixing ring 212 has two slots 41. The fixing ring 212 slides radially along its own axis through the slots 41 to mount the locking block 4. The inner circumferential surface of the protective sleeve 3 has a locking groove 31 for inserting the locking block 4. A spring 42 is fixed to the end face of the locking block 4 away from the protective sleeve 3. The end of the spring 42 away from the locking block 4 is fixedly connected to the inner wall of the slot 41. An inclined surface 43 is provided on the side of the locking block 4 near the protective sleeve 3. The inclined surface 43 is located on the bottom surface of the locking block 4.

[0036] Reference Figure 4 and Figure 5The outer circumferential surface of the protective sleeve 3 has an abutment groove 33 that communicates with the locking groove 31. An abutment block 32 is mounted on the protective sleeve 3 by sliding radially along the abutment groove 33. A slider 34 is fixed to the side of the abutment block 32. A sliding groove 35 is formed on the inner wall of the abutment groove 33. The slider 34 slides and engages with the protective sleeve 3 radially along the sliding groove 35. A second spring 36 is fixed to the side of the slider 34 away from the locking block 4. The end of the second spring 36 away from the slider 34 is fixedly connected to the sliding groove 35.

[0037] Move the protective sleeve 3 upwards from the bottom of the welding gun 22, so that the protective sleeve 3 is fitted onto the outer periphery of the fixing ring 212. The protective sleeve 3 abuts against the inclined surface 43, so that the locking block 4 enters the locking groove 41. The spring 42 is in a compressed state. Then align the locking block 4 with the locking groove 31. Under the elastic force of the spring 42, the locking block 4 is inserted into the locking groove 31, realizing the locking and fixing of the protective sleeve 3 and the fixing ring 212. The protective sleeve 3 and the fixing ring 212 are coaxially arranged, and the welding gun 22 is located inside the protective sleeve 3. When it is necessary to disassemble the protective sleeve 3, press the abutting block 32 towards the locking block 4, so that the abutting block 32 contacts the locking block 4 and pushes the locking block 4 to move, so that the locking block 4 disengages from the locking groove 31, so as to facilitate the disassembly of the protective sleeve 3.

[0038] Reference Figure 6 The protective sleeve 3 has an annular groove 37 on its outer circumferential surface, and an air inlet ring 5 is fixed inside the annular groove 37. An air supply pipe 51 is connected to the outer circumferential surface of the air inlet ring 5, and an air pump 52 is installed on the air supply pipe 51. The other end of the air supply pipe 51 is connected to an air storage system. Several air outlet pipes 53 are installed on the inner circumferential surface of the air inlet ring 5. These air outlet pipes 53 are evenly spaced along the circumference of the air inlet ring 5, and their outlets face the welding torch 22. Each air outlet pipe 53 includes a corrugated pipe 531 and a nozzle 532. One end of the corrugated pipe 531 is fixedly connected to the air inlet ring 5, and the other end is fixedly connected to the nozzle 532. Several through holes 38 are provided on the inner circumferential surface of the protective sleeve 3 for the nozzle 532 to pass through. A movable circular plate 54 is fixedly fitted on the outer circumferential surface of the nozzle 532. Several movable grooves 55 are opened on the inner circumferential surface of the annular groove 37. The movable circular plate 54 slides and engages with the protective sleeve 3 radially along the movable grooves 55.

[0039] Reference Figure 6A spring 56 is fitted onto the outer circumference of the bellows 531. One end of the spring 56 is fixedly connected to the inner circumference of the air intake ring 5, and the other end is fixedly connected to the side of the movable circular plate 54. A moving rod 57 is fixedly attached to the side of the movable circular plate 54 away from the welding torch 22. A through hole 39 communicating with the moving groove 55 is provided on the outer circumference of the protective sleeve 3. The moving rod 57 slides and engages with the protective sleeve 3 radially through the through hole 39. A push ring 6 is fitted onto the outer circumference of the protective sleeve 3. Several push blocks 61 are fixed to the bottom surface of the push ring 6. An inclined surface 62 is provided on the bottom surface of the push block 61. The inclined surface 62 is located on the side of the push block 61 closer to the moving rod 57, and the end of the moving rod 57 can abut against the inclined surface 62.

[0040] The push ring 6 is moved downwards, which in turn drives several push blocks 61 to move downwards simultaneously. The push blocks 61 move the moving rod 57 toward the welding torch 22 via the inclined plane 43. The moving rod 57 drives the nozzle 532 toward the welding torch 22 via the moving circular plate 54, thereby changing the distance between the nozzle 532 and the welding torch 22. This allows the coverage and density of the inert gas to be adjusted according to the different thicknesses of the workpiece or welding requirements, thereby improving the welding effect.

[0041] Reference Figure 6 A limiting block 63 is fixed to the inner circumferential surface of the pushing ring 6, and a limiting groove 64 is formed on the outer circumferential surface of the protective sleeve 3. The limiting block 63 slides vertically with the protective sleeve 3 through the limiting groove 64. A positioning screw 65 is threaded through the outer circumferential surface of the pushing ring 6 and is threadedly connected to the pushing ring 6. The end of the positioning screw 65 can abut against the outer circumferential surface of the protective sleeve 3. The pushing ring 6 is moved vertically to adjust the position of the nozzle 532. After adjustment, the positioning screw 65 is tightened so that the end of the positioning screw 65 abuts tightly against the outer circumferential surface of the protective sleeve 3, thereby fixing the pushing ring 6 and the protective sleeve 3 together.

[0042] The implementation principle of the automatic welding device for elevator shell in this application embodiment is as follows: the air pump 52 is started, and inert gas enters the air inlet ring 5 through the air supply pipe 51, and then is sprayed to the welding area through several air outlet pipes 53. The inert gas in the welding area is fully covered and evenly distributed, ensuring that the welding area is always in a stable protective atmosphere, thereby ensuring the welding quality.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic welding device for elevator shells, characterized in that: The assembly includes a welding table (1) and a robotic arm (2). A movable frame (21) is mounted on the robotic arm (2). A welding torch (22) and a protective sleeve (3) are mounted on the movable frame (21). The protective sleeve (3) is fitted around the outer periphery of the welding torch (22). An air inlet ring (5) is provided on the protective sleeve (3). An air supply pipe (51) is connected to the outer periphery of the air inlet ring (5). An air pump (52) is provided on the air supply pipe (51). An air storage system is connected to the other end of the air supply pipe (51). Several air outlet pipes (53) are installed on the inner periphery of the air inlet ring (5). The several air outlet pipes (53) are arranged at equal intervals along the circumference of the air inlet ring (5). The air outlets of the air outlet pipes (53) face the welding torch (22).

2. The automatic welding device for elevator shell according to claim 1, characterized in that: The movable frame (21) includes a movable block (211). A telescopic rod (23) and a fixing ring (212) are fixed on the bottom surface of the movable block (211). A connecting plate (24) is rotatably installed at the bottom end of the telescopic rod (23). The other end of the connecting plate (24) is fixedly connected to the outer circumferential surface of the protective sleeve (3). The fixing ring (212) is located at the top of the welding torch (22). The welding torch (22) is located at the central axis of the fixing ring (212). The protective sleeve (3) can be fitted onto the outer circumference of the fixing ring (212). A slot (41) is provided on the outer circumference of the fixing ring (212). A locking block (4) is installed on the fixing ring (212) by sliding along its own radial direction through the slot (41). A locking groove (31) for inserting the locking block (4) is provided on the inner circumferential surface of the protective sleeve (3).

3. The automatic welding device for elevator shell according to claim 2, characterized in that: A spring (42) is fixed to the end face of the locking block (4) away from the protective sleeve (3). The end of the spring (42) away from the locking block (4) is fixedly connected to the inner wall of the slot (41). An inclined surface (43) is provided on the side of the locking block (4) near the protective sleeve (3). The inclined surface (43) is located on the bottom surface of the locking block (4).

4. The automatic welding device for elevator shell according to claim 3, characterized in that: The outer circumferential surface of the protective sleeve (3) is provided with an abutment groove (33) that communicates with the snap-fit ​​groove (31). The protective sleeve (3) is equipped with an abutment block (32) that slides radially along its own through the abutment groove (33). A slider (34) is fixed on the side of the abutment block (32). A sliding groove (35) is provided on the inner wall of the abutment groove (33). The slider (34) slides and engages with the protective sleeve (3) radially along the protective sleeve (3) through the sliding groove (35). A second spring (36) is fixed on the side of the slider (34) away from the snap-fit ​​block (4). The end of the second spring (36) away from the slider (34) is fixedly connected to the sliding groove (35).

5. The automatic welding device for elevator shell according to claim 1, characterized in that: The outer circumferential surface of the protective sleeve (3) is provided with an annular groove (37), the air inlet ring (5) is fixed in the annular groove (37), the air outlet pipe (53) includes a corrugated pipe (531) and a nozzle (532), the inner circumferential surface of the protective sleeve (3) is provided with a plurality of through holes (38) for the nozzle (532) to pass through, one end of the corrugated pipe (531) is fixedly connected to the air inlet ring (5), and the other end of the corrugated pipe (531) is connected to the nozzle. (532) Fixed connection, a movable circular plate (54) is fixedly fitted on the outer peripheral surface of the nozzle (532), and a plurality of movable grooves (55) are opened on the inner peripheral surface of the annular groove (37). The movable circular plate (54) slides and engages with the protective sleeve (3) radially through the movable grooves (55). The protective sleeve (3) is provided with a pusher for pushing the movable circular plate (54) to move toward the direction close to the welding gun (22).

6. The automatic welding device for elevator shell according to claim 5, characterized in that: A spring three (56) is sleeved on the outer circumferential surface of the bellows (531). One end of the spring three (56) is fixedly connected to the inner circumferential surface of the air intake ring (5), and the other end of the spring three (56) is fixedly connected to the side of the movable circular plate (54).

7. The automatic welding device for elevator shell according to claim 6, characterized in that: A moving rod (57) is fixed on the side of the movable circular plate (54) away from the welding gun (22). A through hole (39) communicating with the moving groove (55) is opened on the outer peripheral surface of the protective sleeve (3). The moving rod (57) slides and engages with the protective sleeve (3) radially through the through hole (39). The pushing member includes a pushing ring (6) sleeved on the outer periphery of the protective sleeve (3). Several pushing blocks (61) are fixed on the bottom surface of the pushing ring (6). An inclined surface (62) is provided on the bottom surface of the pushing block (61). The inclined surface (62) is located on the side of the pushing block (61) close to the moving rod (57). The end of the moving rod (57) can abut against the inclined surface (62).

8. The automatic welding device for elevator shell according to claim 7, characterized in that: A limiting block (63) is fixed on the inner circumferential surface of the pushing ring (6), and a limiting groove (64) is opened on the outer circumferential surface of the protective sleeve (3). The limiting block (63) slides and engages with the protective sleeve (3) vertically through the limiting groove (64). A positioning screw (65) is provided on the outer circumferential surface of the pushing ring (6). The positioning screw (65) is threadedly connected to the pushing ring (6), and the end of the positioning screw (65) can abut against the outer circumferential surface of the protective sleeve (3).

9. The automatic welding device for elevator shell according to claim 1, characterized in that: The welding table (1) includes two vertically arranged fixed plates (11). Rotating plates (12) are rotatably installed on the inner sides of the two fixed plates (11). A horizontally arranged mounting plate (13) is fixed between the two rotating plates (12). Two sets of symmetrically arranged support members (14) are installed on the top surface of the mounting plate (13). The support member (14) includes a support seat (141) for placing the workpiece and a support plate (142). A backing plate (143) for abutting against the side of the workpiece is provided on the top surface of the mounting plate (13). A cylinder (144) is installed on the top surface of the support plate (142). A pneumatic gripper (145) for clamping the workpiece is installed at the piston rod end of the cylinder (144). The cylinder (144) is located above the support plate (142).

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