A welding device for processing lifting platform accessories

Abstract

The present invention discloses a welding device for processing lifting platform accessories in the field of welding equipment technology, comprising a metal frame, a steel pipe and a connecting frame, wherein the connecting frame is symmetrically rotatably connected with rotating rods at left and right sides; clamping mechanisms are symmetrically arranged at upper and lower sides of the rotating rods, and the clamping mechanisms are used to clamp and release the steel pipes; a rotating mechanism is provided on the connecting frame, and the rotating mechanism is used to drive the rotating rods on the left and right sides to rotate half a circle in relatively opposite directions at the same time; welding mechanisms are symmetrically arranged at upper and lower sides of the rotating rods, and the welding mechanisms are used to weld the upper and lower ends of the steel pipe to the metal frame when the steel pipe clamped by the clamping mechanism is located at the welding position in the metal frame; the device alternately transports the steel pipe and supports the whole by the clamping mechanisms on both sides, which can play an effect of continuously and stably welding the steel pipes and improve the welding efficiency, and the intervals between the welded steel pipes are the same, which can effectively improve the quality of the guardrail.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to a welding device for processing lifting platform accessories. Background Art

[0002] The guardrail is an indispensable safety accessory on the lifting platform. The guardrail is usually equipped with four guardrails to surround the lifting platform, which can effectively prevent people or objects on the lifting platform from falling. The guardrail is usually composed of a metal frame and multiple metal steel pipes, and the multiple metal steel pipes are welded in the metal frame in an equidistant and parallel state.

[0003] The metal steel pipes on the guardrails are usually welded manually. During welding, the worker needs to fix the steel pipe with one hand and operate the welding machine with the other hand. It is not easy to keep the steel pipe stable when manually fixing the steel pipe, so it is easy for the steel pipe to be welded crookedly. At the same time, due to the large number of steel pipes, a lot of time is required during welding, and the efficiency is extremely low. During welding, it is also difficult for workers to ensure that the gap between each steel pipe is consistent. When the gap between the steel pipes is too large, the protective effect will be greatly reduced. Summary of the invention

[0004] The object of the present invention is to provide a welding device for processing lifting platform accessories to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A welding device for processing lifting platform accessories, comprising a metal frame, a steel pipe and a connecting frame, wherein the connecting frame has rotating rods symmetrically connected to the left and right sides of the connecting frame;

[0006] Clamping mechanisms are symmetrically arranged at the upper and lower sides of the rotating rod, and the clamping mechanisms are used to clamp and release the steel pipe;

[0007] The connecting frame is provided with a rotating mechanism, and the rotating mechanism is used to drive the rotating rods on the left and right sides to rotate half a circle in opposite directions at the same time;

[0008] The rotating rod is symmetrically provided with welding mechanisms at the upper and lower sides thereof, and the welding mechanisms are used to weld the upper and lower ends of the steel pipe to the metal frame when the steel pipe clamped by the clamping mechanism is located at the welding position in the metal frame.

[0009] Preferably, the clamping mechanism includes a fixed frame, which is fixedly connected to the end position of the rotating rod and has clamps symmetrically connected to the left and right sides of the fixed frame; a positioning plate is provided at the bottom position of the connecting frame, and the thickness of the positioning plate is the same as the thickness of the bottom side of the metal frame; the clamp is magnetic; a clamping mechanism and a releasing mechanism are provided on the fixed frame; the clamping mechanism is used to drive the two clamps in the loose state to merge and clamp the steel pipe when the rotating rod drives the two clamps in the loose state to rotate clockwise relative to the connecting frame; the releasing mechanism is used to release the two clamps in the clamped state before the rotating rod drives the clamps in the clamped state to rotate clockwise relative to the connecting frame.

[0010] Preferably, the clamping mechanism includes a sliding frame, the sliding frame is slidably connected to the fixed frame and the first connecting rod is symmetrically rotatably connected to the left and right positions of the sliding frame, the other end of the first connecting rod is rotatably connected to the second connecting rod, and the other end of the second connecting rod is fixedly connected to the clamping plate at the position where the fixed frame rotates; the sliding frame is slidably connected to a clamping block, the clamping block is fixedly connected to the first spring, and the other end of the first spring is fixedly connected to the sliding frame; the fixed frame is provided with a clamping slot, and the clamping block is engaged with the clamping slot; the first driving block is fixedly connected to the front side of the sliding frame; an arc rod is provided at a peripheral position of the sliding frame close to the direction of the other sliding frame, the arc rod and the first driving block are at the same height and the arc rod is fixedly connected to the connecting frame.

[0011] Preferably, the arc rods at the left and right sides have the same shape, the front end portion of the arc rod on the left is located on the left side of the rear end portion and the rear end portion of the arc top rod on the right is located on the right side of the front end portion; the trajectory of the first driving block on the left side rotating around the left rotating rod at the rearmost position and the trajectory of the first driving block on the right side rotating around the right rotating rod at the rearmost position and the trajectory of the first driving block on the right side rotating around the right rotating rod are tangent to the rear end and the front end of the arc rod on the right side.

[0012] Preferably, the release mechanism includes a moving frame, which is located at the periphery of the sliding frame close to one side of another sliding frame; a limiting slot is provided on the moving frame, and a limiting block is provided in the limiting slot, and the limiting block is clearance-matched with the limiting slot and the bottom end of the limiting block is rotatably connected to a lifting plate, and the lifting plate is slidably connected to the fixed frame; the upper end part of the clamping block is slidably connected to the lifting plate; the limiting block is coaxial with the rotation and the second driving block is symmetrically fixedly connected to the front and rear sides of the limiting block; the front and rear sides of the moving frame are symmetrically rotatably connected to an inclined rod, and the inclined rod and the moving frame are at the same height; a second spring is fixedly connected to the fixed frame, and the other end of the second spring is fixedly connected to the sliding frame.

[0013] Preferably, the left side of the diagonal rod is in a state of right lower and left higher, and the right side of the diagonal rod is in a state of left lower and right higher; a torsion spring is provided on the diagonal rod at the position where the movable frame rotates, and the torsion spring is used to keep the diagonal rod in an inclined state; a stop block is provided on the inner side of the movable frame at a position of the diagonal rod away from the movable frame, and the stop block is in contact with the surface of the diagonal rod.

[0014] Preferably, the rotating mechanism includes a motor, which is located at the right position behind the connecting frame and the motor is fixedly connected to the connecting frame; the left end of the motor output shaft is fixedly connected to two threaded rods, the two threaded rods are symmetrically distributed at the left and right sides of the connecting frame and the two threaded rods are rotatably connected to the connecting frame; the threaded rod is threadedly connected to a driving frame, and the driving frame is slidably connected to the connecting frame; driving rods are symmetrically provided at the upper and lower sides of the driving frame, the driving rods are rotatably connected to the connecting frame, and the left end of the left driving rod and the right end of the right driving rod are fixedly connected to the first bevel gear, the first bevel gear is meshed with the second bevel gear, and the second bevel gears on the left and right sides are respectively fixedly connected to the driving rods on the left and right sides; a driving groove is provided on the driving rod, and the driving frame is clearance-matched with the driving groove; the middle part of the driving groove is spiral and the two end parts are transverse; the driving frames on the left and right sides are respectively fixedly connected to the two moving frames on the left and right sides.

[0015] Preferably, the welding mechanism comprises two connecting rods, and the two connecting rods are fixedly connected to two clamps respectively; a welding seat is fixedly connected to one end of the connecting rod away from the clamp, the welding seat is arc-shaped and a plurality of welding heads are fixedly connected to the welding seat; a welding machine is fixedly connected to the connecting rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention can provide support for the overall equipment by clamping the welded steel pipe with the clamping mechanism on one side, which can be more stable during transportation of steel pipes and welding; the clamping mechanism on the other side clamps the steel pipe to be welded, and transports the steel pipe to be welded to the welding position under the action of the rotating mechanism, which can become a new support point after the steel pipe is welded; the clamping mechanisms on both sides alternately transport the steel pipe and support the whole, which can achieve the effect of continuous and stable welding of the steel pipe and improve the welding efficiency, and the intervals between the welded steel pipes are the same, which can effectively improve the quality of the guardrail.

[0018] When the present invention closes the steel pipe by closing the two clamps, the clamps will drive the welding seat to stick to the surface of the steel pipe through the connecting rod, and the multiple welding heads on the welding seat will be directly aligned with the end position of the steel pipe; when the steel pipe moves to the welding position, the multiple welding heads can directly weld the steel pipe to the metal frame by starting the welding; the multiple welding heads are arranged around the steel pipe in a surrounding manner through the welding seat, so that the steel pipe can be welded more comprehensively, which can save the tedious steps of multiple welding around the steel pipe during manual welding, and can further improve the efficiency of steel pipe welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a front view structural schematic diagram of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the present invention from the rear;

[0022] Figure 4 It is a schematic diagram of the split structure of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the clamping mechanism in the present invention;

[0024] Figure 6 It is a schematic diagram of the split structure of the clamping mechanism in the present invention;

[0025] Figure 7 It is a structural schematic diagram of the stopper in the present invention;

[0026] Figure 8 It is a structural schematic diagram of the rotating mechanism in the present invention;

[0027] Fig. 9 It is a structural schematic diagram of the welding mechanism in the present invention;

[0028] Fig.10 The schematic diagram of the operation process of the present invention is shown in FIG.

[0029] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0030] 1. Connecting frame; 2. Rotating rod; 3. Fixed frame; 4. Clamp; 5. Positioning plate; 6. Sliding frame; 7. First connecting rod; 8. Second connecting rod; 9. Block; 10. First spring; 11. Slot; 12. First driving block; 13. Arc rod; 14. Moving frame; 15. Limiting slot; 16. Limiting block; 17. Second driving block; 18. Oblique rod; 19. Second spring; 20. Motor; 21. Threaded rod; 22. Driving frame; 23. Driving rod; 24. First bevel gear; 25. Second bevel gear; 26. Driving slot; 27. Connecting rod; 28. Welding seat; 29. ​​Welding head; 30. Welding machine; 31. Lifting plate; 32. Block. DETAILED DESCRIPTION

[0031] See also Figure 1-10 The present invention provides a technical solution: a welding device for processing lifting platform accessories, comprising a metal frame, a steel pipe and a connecting frame 1, and a rotating rod 2 is symmetrically connected to the left and right sides of the connecting frame 1;

[0032] Clamping mechanisms are symmetrically arranged on the upper and lower sides of the rotating rod 2, and the clamping mechanisms are used to clamp and release the steel pipe;

[0033] The connecting frame 1 is provided with a rotating mechanism, which is used to drive the rotating rods 2 on the left and right sides to rotate half a circle in opposite directions at the same time;

[0034] Welding mechanisms are symmetrically arranged at the upper and lower sides of the rotating rod 2, and the welding mechanisms are used to weld the upper and lower ends of the steel pipe to the metal frame when the steel pipe clamped by the clamping mechanism is located at the welding position in the metal frame;

[0035] During work, when welding the guardrail of the lifting platform, first fix the metal frame, and then manually weld the first steel pipe in the metal frame. When the first steel pipe is welded, start the two clamping mechanisms on the left to clamp the welded steel pipe. The equipment can be fixed as a whole in the metal frame through the two clamping mechanisms on the left; clamp the steel pipe to be welded by starting the two clamping mechanisms on the right, and then start the rotating mechanism. The rotating mechanism drives the left and right rotating rods 2 to rotate half a circle relative to the connecting frame 1 at the same time, and the two rotating rods 2 rotate in opposite directions. After the rotating rods 2 on both sides rotate half a circle, the rotating rod 2 on the left remains stationary, and the connecting frame 1 and the rotating rod 2 on the right move to the right side of the rotating rod 2 on the left and transport the steel pipe to be welded to the welding position in the metal frame. At this time, start the welding mechanism, and the steel pipe to be welded in the metal frame can be welded to the metal frame through the welding mechanism;

[0036] When the steel pipe is welded, the clamping mechanism on the right side releases the welded steel pipe at the beginning, and then the rotating mechanism is started again. After the clamping mechanism on the right side is separated from the welded steel pipe, a new steel pipe is placed in the clamp on the right side, and then the new steel pipe is clamped again by the clamping mechanism on the right side. After the rotating mechanism is started again, the connecting frame 1 and the clamping mechanism on the right side drive the new steel pipe to move to the next welding position for welding again;

[0037] The clamping mechanism on one side clamps the welded steel pipe, which can provide support for the overall equipment and make it more stable during transportation and welding. The clamping mechanism on the other side clamps the steel pipe to be welded, and transports the steel pipe to be welded to the welding position under the action of the rotating mechanism, which can become a new support point after the steel pipe is welded. The clamping mechanisms on both sides alternately transport the steel pipe and support the whole, which can achieve the effect of continuous and stable welding of the steel pipe and improve the welding efficiency. The welded steel pipes are spaced the same distance apart, which can effectively improve the quality of the guardrail.

[0038] like Figure 1-2 As shown, as a further solution of the present invention, the clamping mechanism includes a fixing frame 3, the fixing frame 3 is fixedly connected to the end position of the rotating rod 2, and the fixing frame 3 is symmetrically rotatably connected with clamping plates 4 on the left and right sides; a positioning plate 5 is provided at the bottom position of the connecting frame 1, and the thickness of the positioning plate 5 is the same as the thickness of the bottom side of the metal frame; the clamping plate 4 is magnetic; a clamping mechanism and a loosening mechanism are provided on the fixing frame 3; the clamping mechanism is used to drive the two clamping plates 4 in the loose state to merge and clamp the steel pipe when the rotating rod 2 drives the two clamping plates 4 in the loose state to rotate clockwise relative to the connecting frame 1; the loosening mechanism is used to loosen the two clamping plates 4 in the clamped state before the rotating rod 2 drives the clamping plates 4 in the clamped state to rotate clockwise relative to the connecting frame 1;

[0039] During operation, when the steel pipe clamped by the two clamps 4 on the left side (taking the clamps 4 at the upper position as an example, the following description refers to the clamps 4 at the upper left and right positions) is welded, it is necessary to start the right-side releasing mechanism to release the two clamps 4 on the right side. After the two clamps 4 on the right side release the welded steel pipe, the two clamps 4 on the right side are driven to separate from the welded steel pipe through the rotating mechanism. At this time, it is necessary to pause the rotating mechanism and put the new steel pipe to be welded between the two clamps 4 on the right side. The bottom of the steel pipe is fitted with the positioning plate 5. Under the action of the positioning plate 5, the upper and lower ends of the steel pipe are just at the height of the inner walls of the upper and lower sides of the metal frame. At this time, continue to start the rotating mechanism. When the rotating mechanism is running, the clamping mechanism will drive the two clamps 4 on the right side to slowly clamp the steel pipe.

[0040] like Figure 5-6As shown, as a further solution of the present invention, the clamping mechanism includes a sliding frame 6, the sliding frame 6 is slidably connected to the fixed frame 3 and the sliding frame 6 is symmetrically rotatably connected with a first connecting rod 7 at the left and right sides, the other end of the first connecting rod 7 is rotatably connected to the second connecting rod 8, and the other end of the second connecting rod 8 is fixedly connected to the clamping plate 4 at the position where it rotates with the fixed frame 3; the sliding frame 6 is slidably connected with a clamping block 9, the clamping block 9 is fixedly connected with a first spring 10, and the other end of the first spring 10 is fixedly connected to the sliding frame 6; the fixed frame 3 is provided with a clamping groove 11, and the clamping block 9 is engaged with the clamping groove 11; the front side of the sliding frame 6 is fixedly connected with a first driving block 12; the peripheral position of the sliding frame 6 is provided with an arc rod 13 close to the other sliding frame 6, the arc rod 13 and the first driving block 12 are at the same height and the arc rod 13 is fixedly connected to the connecting frame 1;

[0041] The arc-shaped rods 13 at the left and right sides have the same shape, the front end of the left arc-shaped rod 13 is located at the left side of the rear end, and the rear end of the right arc-shaped rod is located at the right side of the front end; the trajectory of the left first driving block 12 rotating around the left rotating rod 2 at the rearmost and frontmost positions is tangent to the front end and rear end of the left arc-shaped rod 13 respectively; the trajectory of the right first driving block 12 rotating around the right rotating rod 2 at the rearmost and frontmost positions is tangent to the rear end and front end of the right arc-shaped rod 13 respectively;

[0042] During operation, after the two clamping plates 4 on the right are loosened and the welded steel pipes are connected, the sliding frame 6 and the first driving block 12 connected thereto are both in the frontmost position, and as the right rotating rod 2 starts to rotate clockwise relative to the connecting frame 1, the first driving block 12 will slowly approach the front end portion of the arc-shaped rod 13 corresponding thereto; when the first driving block 12 fits the front end portion of the arc-shaped rod 13, as the rotating rod 2 continues to rotate, the first driving block 12 will be squeezed by the arc-shaped rod 13, and the first driving block 12 and the sliding frame 6 will slowly move in the direction close to the fixed frame 3; when the first driving block 12 is in contact with the front end portion of the arc-shaped rod 13, .... When the block 12 moves to the rear end part of the arc rod 13, the sliding frame 6 moves to the position closest to the fixed frame 3, and the blocking block 9 on the sliding frame 6 engages with the card slot 11 on the fixed frame 3 under the action of the first spring 10; when the sliding frame 6 moves to the position close to the fixed frame 3, the sliding frame 6 pushes the two second connecting rods 8 to rotate respectively through the two first connecting rods 7, and the two second connecting rods 8 will respectively push the two clamping plates 4 to rotate. When the sliding frame 6 moves to the position closest to the fixed frame 3, the two clamping plates 4 just rotate to the closest position, and the two clamping plates 4 can clamp the steel pipe.

[0043] like Figure 5-7As shown, as a further solution of the present invention, the release mechanism includes a moving frame 14, which is located on the periphery of the sliding frame 6 near one side of another sliding frame 6; a limiting groove 15 is provided on the moving frame 14, and a limiting block 16 is provided in the limiting groove 15, the limiting block 16 is clearance-matched with the limiting groove 15 and the bottom end of the limiting block 16 is rotatably connected to a lifting plate 31, and the lifting plate 31 is slidably connected to the fixed frame 3; the upper end part of the clamping block 9 is slidably connected to the lifting plate 31; the limiting block 16 is coaxial with the rotation and the limiting block 16 is symmetrically fixedly connected to the front and rear sides of the limiting block 16; the front and rear sides of the moving frame 14 are symmetrically rotatably connected to an inclined rod 18, and the inclined rod 18 and the moving frame 14 are at the same height; a second spring 19 is fixedly connected to the fixed frame 3, and the other end of the second spring 19 is fixedly connected to the sliding frame 6;

[0044] The left side inclined rod 18 is in a state of right lower and left higher, and the right side inclined rod 18 is in a state of left lower and right higher; a torsion spring is provided on the inclined rod 18 at the position where it rotates with the driving frame 22, and the torsion spring is used to keep the inclined rod 18 in an inclined state; a stopper 32 is provided on the inner side of the moving frame 14 at a position of the inclined rod 18 away from the moving frame 14, and the stopper 32 is in contact with the surface of the inclined rod 18;

[0045] During operation, when the two clamping plates 4 on the right side are needed to loosen the welded steel pipes, the mobile frame 14 on the right side is driven to move to the left. When the mobile frame 14 moves, it drives the two inclined rods 18 to move to the left. Under the action of the stopper 32, the inclined rod 18 will directly lift the limit block 16 through the second driving block 17. When the limit block 16 is lifted up, it will drive the clamping block 9 to move upward and disengage from the clamping slot 11; when the clamping block 9 is disengaged from the clamping slot 11, under the action of the second spring 19, the sliding frame 6 will directly slide forward, and the sliding frame 6 will drive the two clamping plates 4 to open and loosen the welded steel pipes through the two first connecting rods 7 and the two second connecting rods 8.

[0046] like Figure 8As shown, as a further solution of the present invention, the rotating mechanism includes a motor 20, which is located at the right rear position of the connecting frame 1 and the motor 20 is fixedly connected to the connecting frame 1; the left end of the output shaft of the motor 20 is fixedly connected to two threaded rods 21, the two threaded rods 21 are symmetrically distributed on the left and right sides of the connecting frame 1 and the two threaded rods 21 are both rotatably connected to the connecting frame 1; a driving frame 22 is threadedly connected to the threaded rod 21, and the driving frame 22 is slidably connected to the connecting frame 1; driving rods 23 are symmetrically arranged at the upper and lower sides of the driving frame 22, the driving rod 23 is rotatably connected to the connecting frame 1, and the left end of the left driving rod 23 and the right end of the right driving rod 23 are both fixedly connected to the first bevel gear 24, the first bevel gear 24 is meshed with a second bevel gear 25, and the second bevel gears 25 on the left and right sides are respectively fixedly connected to the driving rods 23 on the left and right sides; a driving groove 26 is provided on the driving rod 23, and the driving frame 22 and the driving groove 26 are clearance-matched; the middle part of the driving groove 26 is spiral and the two end parts are transverse; the left and right driving frames 22 are respectively fixedly connected to the two moving frames 14 on the left and right sides;

[0047] When working, by starting the motor 20, the motor 20 drives the two threaded rods 21 to rotate at the same time, and the two threaded rods 21 will simultaneously drive the driving frames 22 on the left and right sides to move to the left, and the driving frame 22 will drive the two mobile frames 14 connected thereto to move to the left when it moves to the left; when the right driving frame 22 moves to the left, the two clamping plates 4 on the right side are opened to loosen the welded steel pipe; as the driving frame 22 continues to move to the left, the driving frame 22 will move from the driving grooves 26 horizontally distributed on the driving rod 23 to the spiral driving grooves 26, and at this time, when the driving frame 22 continues to move, it will drive the driving rod 23 to rotate, and the driving rod 23 drives the first bevel gear 24 to rotate, and the first bevel gear 24 will drive the rotating rod 2 to rotate relative to the connecting frame 1 through the second bevel gear 25; when the driving frame 22 passes over the spiral driving grooves 26, the rotating rods 2 on the left and right sides just rotate half a circle relative to the connecting frame 1; at this time, the connecting frame 1 flips over half a circle, and the positions of the rotating rods 2 on the left and right sides are reversed.

[0048] like Fig. 9 As shown, as a further solution of the present invention, the welding mechanism includes two connecting rods 27, and the two connecting rods 27 are fixedly connected to the two clamping plates 4 respectively; the end of the connecting rod 27 away from the clamping plate 4 is fixedly connected to a welding seat 28, the welding seat 28 is in an arc shape and a plurality of welding heads 29 are fixedly connected to the welding seat 28; the connecting rod 27 is fixedly connected to a welding machine 30;

[0049] During operation, when the two clamps 4 are closed to clamp the steel pipe, the clamps 4 will drive the welding seat 28 to stick to the surface of the steel pipe through the connecting rod 27, and the multiple welding heads 29 on the welding seat 28 will be directly aligned with the end position of the steel pipe; when the steel pipe moves to the welding position, by starting welding, the multiple welding heads 29 can directly weld the steel pipe to the metal frame; through the welding seat 28, the multiple welding heads 29 are arranged around the steel pipe in a surrounding manner, so that the steel pipe can be welded more comprehensively, which can save the tedious steps of multiple welding around the steel pipe during manual welding, and can further improve the efficiency of steel pipe welding.

Claims

1. A welding device for processing lifting platform accessories, comprising a connecting frame (1), characterized in that: The connecting frame (1) is symmetrically and rotationally connected to rotating rods (2) at left and right sides. Clamping mechanisms are symmetrically arranged at the upper and lower sides of the rotating rod (2), and the clamping mechanisms are used to clamp and release the steel pipe; The connecting frame (1) is provided with a rotating mechanism, and the rotating mechanism is used to drive the rotating rods (2) on the left and right sides to rotate half a circle in opposite directions at the same time; The rotating rod (2) is symmetrically provided with welding mechanisms at upper and lower sides, the welding mechanisms being used to weld the upper and lower ends of the steel pipe to the metal frame when the steel pipe clamped by the clamping mechanism is located at a welding position in the metal frame; The clamping mechanism comprises a fixed frame (3), the fixed frame (3) is fixedly connected to the end position of the rotating rod (2), and clamping plates (4) are symmetrically rotatably connected to the left and right sides of the fixed frame (3); a positioning plate (5) is provided at the bottom position of the connecting frame (1), and the thickness of the positioning plate (5) is the same as the thickness of the bottom side part of the metal frame; the clamping plate (4) is magnetic; a clamping mechanism and a loosening mechanism are provided on the fixed frame (3); the clamping mechanism is used to drive the two clamping plates (4) in a loose state to merge and clamp the steel pipe when the rotating rod (2) drives the two clamping plates (4) in a loose state to rotate clockwise relative to the connecting frame (1); the loosening mechanism is used to loosen the two clamping plates (4) in a clamped state before the rotating rod (2) drives the clamping plates (4) in a clamped state to rotate clockwise relative to the connecting frame (1).

2. According to claim 1, a welding device for processing lifting platform accessories is characterized in that: The clamping mechanism comprises a sliding frame (6), the sliding frame (6) is slidably connected to the fixed frame (3), and the sliding frame (6) is symmetrically rotatably connected to a first connecting rod (7) at left and right sides, the other end of the first connecting rod (7) is rotatably connected to a second connecting rod (8), and the other end of the second connecting rod (8) is fixedly connected to a position on the clamping plate (4) at a rotation point with the fixed frame (3); a clamping block (9) is slidably connected to the sliding frame (6), and a first spring (10) is fixedly connected to the clamping block (9). The other end of the first spring (10) is fixedly connected to the sliding frame (6); a slot (11) is provided on the fixed frame (3), and the clamping block (9) is clamped and matched with the slot (11); a first driving block (12) is fixedly connected to the front side of the sliding frame (6); an arc rod (13) is provided at a peripheral position of the sliding frame (6) close to the other sliding frame (6), the arc rod (13) and the first driving block (12) are at the same height and the arc rod (13) is fixedly connected to the connecting frame (1).

3. A welding device for processing lifting platform accessories according to claim 2, characterized in that: The arc-shaped rods (13) at the left and right sides have the same shape, the front end of the arc-shaped rod (13) at the left side is located at the left side of the rear end, and the rear end of the arc-shaped rod at the right side is located at the right side of the front end; the trajectory of the first driving block (12) at the left side rotating around the left rotating rod (2) at the rearmost and frontmost positions is tangent to the front end and rear end of the arc-shaped rod (13) at the left side, respectively; the trajectory of the first driving block (12) at the right side rotating around the right rotating rod (2) at the rearmost and frontmost positions is tangent to the rear end and front end of the arc-shaped rod (13) at the right side, respectively.

4. According to claim 2, a welding device for processing lifting platform accessories is characterized in that: The release mechanism comprises a moving frame (14), the moving frame (14) being located on the periphery of the sliding frame (6) and close to one side of another sliding frame (6); a limiting groove (15) is provided on the moving frame (14), a limiting block (16) is provided in the limiting groove (15), the limiting block (16) and the limiting groove (15) are clearance-matched, and a lifting plate (31) is rotatably connected to the bottom end of the limiting block (16), and the lifting plate (31) is slidably connected to the fixed frame (3); the clamping block (9) The upper end portion is slidably connected to the lifting plate (31); the limit block (16) is coaxial with the rotation and a second driving block (17) is symmetrically fixedly connected to the limit block (16) at both sides; an inclined rod (18) is symmetrically rotationally connected to the front and rear sides of the moving frame (14), and the inclined rod (18) and the moving frame (14) are at the same height; a second spring (19) is fixedly connected to the fixed frame (3), and the other end of the second spring (19) is fixedly connected to the sliding frame (6).

5. A welding device for processing lifting platform accessories according to claim 4, characterized in that: The left side of the inclined rod (18) is in a state where the right side is lower and the left side is higher, and the right side of the inclined rod (18) is in a state where the left side is lower and the right side is higher; a torsion spring is provided on the inclined rod (18) at a position where it rotates with the moving frame (14), and the torsion spring is used to keep the inclined rod (18) in an inclined state; a stopper (32) is provided on the inner side of the moving frame (14) at a position on the side of the inclined rod (18) away from the moving frame (14), and the stopper (32) is in contact with the surface of the inclined rod (18).

6. A welding device for processing lifting platform accessories according to claim 4, characterized in that: The rotating mechanism comprises a motor (20), the motor (20) being located at a rear right position of the connecting frame (1) and the motor (20) being fixedly connected to the connecting frame (1); two threaded rods (21) being fixedly connected to the left end of the output shaft of the motor (20), the two threaded rods (21) being symmetrically distributed at left and right sides of the connecting frame (1) and both of the two threaded rods (21) being rotatably connected to the connecting frame (1); a driving frame (22) being threadedly connected to the threaded rods (21), the driving frame (22) being slidably connected to the connecting frame (1); driving rods (23) being symmetrically provided at upper and lower sides of the driving frame (22), the driving rods (23) being rotatably connected to the connecting frame (1); The connecting frame (1) is rotatably connected and the left end of the left driving rod (23) and the right end of the right driving rod (23) are both fixedly connected with a first bevel gear (24), the first bevel gear (24) is meshed with a second bevel gear (25), and the second bevel gears (25) on the left and right sides are respectively fixedly connected to the driving rods (23) on the left and right sides; a driving groove (26) is provided on the driving rod (23), and the driving frame (22) and the driving groove (26) are clearance-matched; the middle part of the driving groove (26) is spiral-shaped and the two end parts are transversely shaped; the driving frames (22) on the left and right sides are respectively fixedly connected to the two moving frames (14) on the left and right sides.

7. The welding device for processing lifting platform accessories according to claim 1 is characterized in that: The welding mechanism comprises two connecting rods (27), the two connecting rods (27) being fixedly connected to two clamping plates (4) respectively; one end of the connecting rod (27) away from the clamping plate (4) is fixedly connected to a welding seat (28), the welding seat (28) is arc-shaped and a plurality of welding heads (29) are fixedly connected to the welding seat (28); and a welding machine (30) is fixedly connected to the connecting rod (27).

Images