A welding tool for the telescopic beam structure of a sling

Abstract

The present invention relates to the technical field of welding tooling, and specifically discloses a welding tooling for a telescopic beam structure of a spreader, comprising a main beam assembly, a first fixing device, a second fixing device and a telescopic beam, wherein the first fixing device is fixedly provided on the left and right sides of the top outer wall of the main beam assembly, and the second fixing device is fixedly provided on the front and rear sides of the top outer wall of the main beam assembly, and a plurality of telescopic beams can be provided on the bottom surface of the main beam assembly, and the first fixing device and the second fixing device can cooperate with the telescopic beams; the technical solution of the welding tooling for the telescopic beam structure of a spreader provided by the present invention has a flexible structure, can flexibly fix a single telescopic beam and multiple telescopic beams, the fixing device has a long service life, reduces safety hazards, and the open design is convenient for inspection, and is suitable for multiple telescopic beams that can still be flexibly adjusted and fixed when they are located at different orientations on the bottom surface of the main beam assembly.

Description

Technical Field

[0001] The invention relates to the technical field of welding tooling, in particular to a welding tooling for a telescopic beam structure of a sling. Background Art

[0002] In industrial production, telescopic beams of slings are widely used in material handling, welding tooling, automated production lines and other fields. Traditional telescopic beam fixing methods usually adopt bolt tightening, manual clamping or single-direction positioning structure. Traditional tooling is usually only suitable for fixing telescopic beams of a single size or a single direction, and it is difficult to adapt to the needs of telescopic beams of different specifications or different installation positions. When it is necessary to adjust the installation angle of the telescopic beam or fix multiple telescopic beams, it is often necessary to replace or redesign the tooling, resulting in reduced production efficiency.

[0003] In the existing technology, the positioning of the telescopic beam mostly relies on manual adjustment, which is prone to positioning deviation due to operational errors, affecting the welding accuracy. In addition, the traditional clamping mechanism is easily affected by vibration or external force during the welding process, causing the telescopic beam to loosen or shift, affecting the processing quality; traditional tooling usually relies on manual adjustment, such as manually tightening bolts or adjusting clamps, which is not only time-consuming and labor-intensive, but also difficult to achieve rapid replacement or precise positioning, and cannot meet the needs of modern automated production.

[0004] Some welding tooling adopts a closed structure, which limits the installation, adjustment and inspection process of the telescopic beam, making it difficult to observe the welding status in real time or make quick adjustments, affecting processing efficiency and quality control. Existing fixtures are usually only suitable for specific models of telescopic beams. When the size or installation method of the telescopic beam changes, the tooling needs to be redesigned or replaced, which increases production costs and management difficulties. Summary of the Invention

[0005] The object of the present invention is to provide a welding tool for a telescopic beam structure of a sling to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a welding tool for a telescopic beam structure of a sling, comprising a main beam assembly, a first fixing device, a second fixing device and a telescopic beam, the first fixing devices being fixedly provided on both the left and right sides of the top outer wall of the main beam assembly, the second fixing devices being fixedly provided on both the front and rear sides of the top outer wall of the main beam assembly, a plurality of telescopic beams being capable of being provided with a bottom surface of the main beam assembly, the first fixing device and the second fixing device being capable of cooperating with the telescopic beam to adjust and fix the telescopic beam, thereby performing welding between the main beam assembly and the telescopic beam.

[0007] Preferably, the main beam assembly includes a first concave plate, a first rectangular plate, a first groove, a second groove, a first rectangular block, a second rectangular block, a second concave plate, a second rectangular plate and a third rectangular block;

[0008] The top and bottom surfaces of the first concave plate are fixedly provided with a first rectangular plate, and the two first rectangular plates are divided into a top end and a bottom end. The centers of the top surfaces of the two first rectangular plates are provided with a first groove that runs through the top and bottom. The front sides of the two first rectangular plates are provided with a plurality of equidistant second grooves, and the plurality of second grooves run through the top and bottom. The two first rectangular plates are divided into a plurality of small rectangular plates by the plurality of first grooves and second grooves. The small rectangular plates of the two first rectangular plates are divided into two groups, front and back. The front ends of the top front ends of the plurality of small rectangular plates of the front group of the first rectangular plate at the bottom end are fixed with a first rectangular block. One end of the first rectangular block, the other end of the first rectangular block is fixedly arranged on the bottom surface of the front group of several small rectangular plates of the top first rectangular plate, the top surface of the first rectangular plate at the top is fixedly provided with a second concave plate, the top surface of the second concave plate is fixedly provided with a second rectangular plate, the front end of the top group of several small rectangular plates of the first rectangular plate at the top is fixedly provided with one end of the second rectangular block, the other end of the second rectangular block is fixedly provided on the bottom surface of the second rectangular plate, and the second rectangular plate connects and fixes the front group of several small rectangular plates of the two first rectangular plates, and the third rectangular block is fixedly provided at the center of the top surface of the second rectangular plate.

[0009] Preferably, the plurality of first grooves and the second grooves of the two first rectangular plates are interlaced and communicated with each other.

[0010] Preferably, the main beam assembly further comprises a first round rod, a round plate, a second round rod and a third groove;

[0011] Several first round rods that can slide forward, backward, left and right are provided in the first groove and the second groove in the first rectangular plate at the top. The top surfaces of several first round rods are fixed with round plates, the bottom surfaces of several first round rods are fixed with second round rods, and the bottom surfaces of several second round rods are provided with third grooves.

[0012] Preferably, the third groove matches the positioning pin at the center of the top surface of the telescopic beam.

[0013] Preferably, the first fixing device includes a first electric push rod, a second electric push rod, a fourth rectangular block, a first cavity, a third rectangular plate, a first rack, a first rotating shaft and a first cylindrical block;

[0014] The first fixing devices are fixedly provided on the left and right sides of the outer wall of the third rectangular block, one end of the first electric push rod is fixedly provided on the left side of the outer wall of the third rectangular block, the other end of the first electric push rod is fixedly provided on the outer wall of one end of the second electric push rod, and the other end of the second electric push rod is fixedly provided with a fourth rectangular block, a first cavity running through the left and right is opened in the fourth rectangular block, a third rectangular plate capable of moving left and right is provided in the bottom end of the first cavity, a first rack is fixedly provided on the front and rear ends of the top face of the third rectangular plate, a first rotating shaft is sleeved in the center of the front and rear outer walls of the fourth rectangular block, and the first cylindrical blocks are sleeved in the two first rotating shafts.

[0015] Preferably, the first fixing device further comprises a first gear and a first brake motor;

[0016] A first gear is fixedly provided at one end of the two first cylindrical blocks, and the first gear is arranged in the first cavity. The two first gears are engaged with the first rack, and the two first gears are located at one end of the first rotating shaft and at a certain distance. A first brake motor is fixedly provided at the other end of the two first rotating shafts, and the output end of the first brake motor is connected and fixed to the other end of the first cylindrical block.

[0017] Preferably, the second fixing device includes a third electric push rod, a fourth electric push rod, a fifth rectangular block, a second cavity, a fourth rectangular plate, a second rack, a second rotating shaft and a second cylindrical block;

[0018] The second fixing devices are fixedly provided on the front and rear sides of the outer wall of the third rectangular block, one end of the third electric push rod is fixedly provided on the front side of the outer wall of the third rectangular block, the other end of the third electric push rod is fixedly provided with the outer wall of one end of the fourth electric push rod, and the other end of the fourth electric push rod is fixedly provided with a fifth rectangular block, a second cavity running through the front and back is opened in the fifth rectangular block, a fourth rectangular plate capable of moving forward and backward is provided in the bottom end of the second cavity, second racks are fixedly provided on the left and right ends of the top surface of the fourth rectangular plate, a second rotating shaft is sleeved in the center of the left and right outer walls of the fifth rectangular block, and second cylindrical blocks are sleeved in the two second rotating shafts.

[0019] Preferably, the second fixing device further comprises a second gear and a second brake motor;

[0020] A second gear is fixedly provided at one end of the two second cylindrical blocks, and the second gear is arranged in the second cavity. The two second gears are engaged with the second rack, and the two second gears are located at one end of the second rotating shaft and at a certain distance. A second brake motor is fixedly provided at the other end of the two second rotating shafts, and the output end of the second brake motor is connected and fixed to the other end of the second cylindrical block.

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

[0022] 1. Through the combination of the first concave plate, the first rectangular plate, the first groove, the second groove and other components, this design can not only adapt to the fixation of a single telescopic beam, but also fix multiple telescopic beams at the same time, and is suitable for telescopic beams of different orientations and sizes, greatly improving the versatility and flexibility of the tooling; the front side of the main beam assembly is an open design, which is convenient for observation and operation, simplifies the adjustment steps during the welding process, and improves work efficiency.

[0023] 2. The telescopic beam is precisely positioned through the cooperation of the first round rod, the circular plate, the second round rod and the third groove. The third groove matches the positioning pin at the center of the top surface of the telescopic beam. No matter how the second round rod slides, the positioning pin and the groove can be precisely docked, thereby ensuring that the fixed position of the telescopic beam is accurate.

[0024] 3. The first fixing device and the second fixing device adopt an electric push rod and a gear rack transmission mechanism. The first brake motor drives the first gear to drive the first rack to move, thereby achieving clamping and fixing of the telescopic beam, and at the same time being able to adjust the direction offset of the telescopic beam. The self-locking function of the first brake motor ensures the stability of the clamping and prevents loosening or displacement during welding. The bidirectional rotation function of the first brake motor can achieve rapid clamping and release of the telescopic beam, thereby improving the adjustment efficiency of the welding tooling; the self-locking function of the first brake motor not only improves the fixing effect, but also enhances the safety of the tooling and prevents clamping failure due to external force or vibration.

[0025] To sum up, the technical solution for the welding tooling of the telescopic beam structure of the sling provided by the present invention has a flexible structure, can flexibly fix a single telescopic beam and multiple telescopic beams, the fixing device has a long service life, reduces safety hazards, and the open design is convenient for inspection. It is suitable for multiple telescopic beams that can still be flexibly adjusted and fixed when they are located in different positions on the bottom surface of the main beam assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic structural diagram of the main beam assembly of the present invention;

[0028] Figure 3 This is a schematic diagram of the exploded structure of the main beam assembly of the present invention;

[0029] Figure 4 This is a schematic diagram of the second round rod structure of the main beam assembly of the present invention;

[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of the second round rod of the main beam assembly of the present invention;

[0031] Figure 6 This is a schematic structural diagram of the first fixing device of the present invention;

[0032] Figure 7 This is a schematic structural diagram of the first rotating shaft connection assembly of the first fixing device of the present invention;

[0033] Figure 8 is a schematic cross-sectional structural diagram of a first fixing device of the present invention;

[0034] Figure 9 is a schematic cross-sectional structural diagram of a second fixing device of the present invention;

[0035] Figure 10 This is a schematic diagram of the second cavity structure of the second fixing device of the present invention.

[0036] In the figure: 1, main beam assembly; 11, first concave plate; 12, first rectangular plate; 13, first groove; 14, second groove; 15, first rectangular block; 16, second rectangular block; 17, second concave plate; 18, second rectangular plate; 19, third rectangular block; 110, first round rod; 111, round plate; 112, second round rod; 113, third groove.

[0037] First fixing device; 21. First electric push rod; 22. Second electric push rod; 23. Fourth rectangular block; 24. First cavity; 25. Third rectangular plate; 26. First rack; 27. First rotating shaft; 28. First cylindrical block; 29. First gear; 210. First brake motor.

[0038] 3. Second fixing device; 31. Third electric push rod; 32. Fourth electric push rod; 33. Fifth rectangular block; 34. Second cavity; 35. Fourth rectangular plate; 36. Second rack; 37. Second rotating shaft; 39. Second gear; 310. Second brake motor.

[0039] 4. Telescopic beam. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0041] See also Figures 1-10The present invention provides a technical solution for welding tooling of a telescopic beam structure of a sling: it includes a main beam assembly 1, a first fixing device 2, a second fixing device 3 and a telescopic beam 4, the first fixing device 2 is fixedly provided on the left and right sides of the top outer wall of the main beam assembly 1, and the second fixing device 3 is fixedly provided on the front and back sides of the top outer wall of the main beam assembly 1. The first fixing device 2 and the second fixing device 3 have the same principle and can be adjusted and clamped in different directions. The bottom surface of the main beam assembly 1 can be provided with several telescopic beams 4. The bottom surface of the main beam assembly 1 can be provided with a single telescopic beam 4 and several contraction beams 4. The first fixing device 2 and the second fixing device 3 can cooperate with the telescopic beam 4. The first fixing device 2 and the second fixing device 3 can adjust and fix the telescopic beam 4 or several telescopic beams 4. This fixing method can be applied to multiple telescopic beams 4, and they can still be flexibly adjusted and fixed when they are located at different orientations on the bottom surface of the main beam assembly 1.

[0042] As a preferred solution, further, the main beam assembly 1 includes a first concave plate 11, a first rectangular plate 12, a first groove 13, a second groove 14, a first rectangular block 15, a second rectangular block 16, a second concave plate 17, a second rectangular plate 18 and a third rectangular block 19. The top and bottom surfaces of the first concave plate 11 are fixedly provided with the first rectangular plate 12, and the two first rectangular plates 12 are divided into a top end and a bottom end. The top surface centers of the two first rectangular plates 12 are each provided with a first groove 13 that passes through from top to bottom. The front sides of the two first rectangular plates 12 are each provided with a plurality of equidistant second grooves 14, and the plurality of second grooves 14 pass through from top to bottom. The plurality of first grooves 13 and the second grooves 14 of the two first rectangular plates 12 are staggered and connected. The two first rectangular plates 12 are divided into a plurality of small rectangular plates by the plurality of first grooves 13 and the second grooves 14. The small rectangular plates of the two first rectangular plates 12 are divided into two groups, front and back. The front group of the first rectangular plate 12 at the bottom has a plurality of small rectangular plates. The front end of the top surface of the plate is fixedly provided with one end of a first rectangular block 15, and the other end of the first rectangular block 15 is fixedly provided on the bottom surface of several small rectangular plates of the front group of the top first rectangular plate 12, and the top surface of the top first rectangular plate 12 is fixedly provided with a second concave plate 17, and the top surface of the second concave plate 17 is fixedly provided with a second rectangular plate 18; the front end of the top surface of several small rectangular plates of the front group of the top first rectangular plate 12 is fixedly provided with one end of a second rectangular block 16, and the other end of the second rectangular block 16 is fixedly provided on the bottom surface of the second rectangular plate 18, and the second rectangular plate 18 is connected and fixed to several small rectangular plates of the front group of the two first rectangular plates 12, and the small rectangular plates of the front group of the two first rectangular plates 12 are connected and fixed through several first rectangular blocks 15 and several second rectangular blocks 16. A third rectangular block 19 is fixedly provided at the center of the top surface of the second rectangular plate 18. The front side of this component is open, and this design structure is convenient for the use of subsequent devices, and observation is more convenient and operation is simpler.

[0043] As a preferred solution, further, the main beam assembly 1 also includes a first round rod 110, a circular plate 111, a second round rod 112 and a third groove 113. The first groove 13 and the second groove 14 in the top first rectangular plate 12 are provided with several first round rods 110 that can slide back and forth and left and right. The top surfaces of several first round rods 110 are fixedly provided with circular plates 111, the bottom surfaces of several first round rods 110 are fixedly provided with second round rods 112, and the bottom surfaces of several second round rods 112 are provided with third grooves 113. The third groove 113 matches the locating pin in the center of the top surface of the telescopic beam 4. No matter how the second round rod 112 slides in the first groove 13 and the second groove 14 at the upper end through the first round rod 110, the third groove 113 can penetrate to the first groove 13 and the second groove 14 at the lower end. When the second round rod 112 moves to the specified position, it is connected to the locating pin in the center of the top surface of the telescopic beam 4.

[0044] As a preferred embodiment, further, the first fixing device 2 includes a first electric push rod 21, a second electric push rod 22, a fourth rectangular block 23, a first cavity 24, a third rectangular plate 25, a first rack 26, a first rotating shaft 27, a first cylindrical block 28, a first gear 29 and a first brake motor 210. The first fixing device 2 is fixedly provided on both sides of the left and right outer walls of the third rectangular block 19. One end of the first electric push rod 21 is fixedly provided on the left side of the outer wall of the third rectangular block 19, and one end of the second electric push rod 22 is fixedly provided on the other end of the first electric push rod 21. The first electric push rod 21 and the second electric push rod 22 are three-section electric push rods with a longer unfolded length and an improved range of applicable models for telescopic beams 4 of different sizes. The other end of the second electric push rod 22 is fixedly provided with a fourth rectangular block 23. A first cavity 24 that runs through the left and right is opened in the fourth rectangular block 23. A third rectangular plate 25 that can move left and right is provided at the bottom end of the first cavity 24. The third rectangular plate 25 has two front and rear ends on the top. The ends are fixedly provided with first racks 26; the centers of the front and rear outer walls of the fourth rectangular block 23 are both sleeved with first rotating shafts 27, and the two first cylindrical blocks 28 are sleeved with first gears 29 at one end of the two first cylindrical blocks 28, and the first gears 29 are arranged in the first cavity 24, and the two first gears 29 are meshed with the first racks 26, and the two first gears 29 are located at one end of the first rotating shaft 27 and at a certain distance, and the other ends of the two first rotating shafts 27 are fixedly provided with first brake motors 210. The added function of the first brake motors 210 is that they have a self-locking structure. This self-locking has a certain fixing effect, and can clamp and fix the telescopic beam 4 through the third rectangular plate 25, and can rotate in both clockwise and counterclockwise directions. The two first brake motors 210 both make the first gear 29 drive the first rack 26 to move the third rectangular plate 25 left and right, and the output end of the first brake motor 210 is connected and fixed to the other end of the first cylindrical block 28.

[0045] As a preferred solution, further, the second fixing device 3 includes a third electric push rod 31, a fourth electric push rod 32, a fifth rectangular block 33, a second cavity 34, a fourth rectangular plate 35, a second rack 36, a second rotating shaft 37, a second cylindrical block, a second gear 39 and a second brake motor 310. The second fixing device 3 is fixedly provided on both the front and rear sides of the outer wall of the third rectangular block 19. One end of the third electric push rod 31 is fixedly provided on the front side of the outer wall of the third rectangular block 19. The other end of the third electric push rod 31 is fixedly provided with an outer wall of one end of the fourth electric push rod 32. The other end of the fourth electric push rod 32 is fixedly provided with the fifth rectangular block 33. A second cavity 34 that runs through from front to back is opened in the fifth rectangular block 33. A fourth rectangular plate 35 that can move back and forth is provided in the bottom end of the second cavity 34. Second racks 36 are fixedly provided on the left and right ends of the top surface of the fourth rectangular plate 35. The left A second rotating shaft 37 is sleeved in the center of the outer wall on the right side, and a second cylindrical block is sleeved in the two second rotating shafts 37. A second gear 39 is fixedly provided at one end of the two second cylindrical blocks, and the second gear 39 is arranged in the second cavity 34. The two second gears 39 are meshed with the second rack 36, and the two second gears 39 are located at one end of the second rotating shaft 37 and have a certain distance. A second brake motor 310 is fixedly provided at the other end of the two second rotating shafts 37, and the output end of the second brake motor 310 is connected and fixed to the other end of the second cylindrical block. This device has the same principle as the first fixing device 2 but a different shape. Both fixing methods can fix the horizontal and vertical telescopic beams 4. The work station fixation is different, and the two fixing devices can be better fixed. By correcting and clamping the telescopic beam at 4 points, the mechanical structure of the two fixing devices has improved service life, and the open design is more intuitive and convenient for maintenance.

[0046] The detailed connection means are well-known technologies in the field. The following mainly introduces the working principle and process. The specific work is as follows: the device can install a single or multiple telescopic beams 4. How many telescopic beams 4 need to be installed, and the corresponding second round rods 112 need to be installed. The first round rod 110 passes through the front side of the outer wall of the main beam assembly 1 into the first groove 13 at the top, so that the staff can adjust the position of the second round rod 112 in the first groove 13 or the second groove 14. Because the several first grooves 13 and the second grooves 14 of the two first rectangular plates 12 are aligned up and down, the third groove 113 penetrates to the several first grooves 13 and the first grooves 14 of the bottom first rectangular plate 12 no matter where it slides. The first gear 29 is driven by the two first brake motors 210, and the second gear 29 is driven by the two first brake motors 211. The first gear 29 is driven by the two first brake motors 212, and the second gear 29 is driven by the two first brake motors 213. A gear 29 is meshed with the first rack 26, so that the first gear 29 rotates counterclockwise to drive the third rectangular plate 25 to push the center of the outer wall of the telescopic beam 4. Because the outer wall of the third rectangular plate 25 is a right-angled surface, it can push the telescopic beam 4 to be perpendicular to the main beam in a cross shape. Similarly, another first fixing device 2 is pushed to cooperate with a first fixing device 2 to clamp and fix the telescopic beam 4, so that workers can perform welding. This design method can correct and adjust the telescopic beam 4 at any position of the main beam, and can also fix it at the same time; when the telescopic beam 4 is horizontal and overlaps with the main beam, a third electric push rod 31 of a second fixing device 3 moves outward to expand, and the fourth electric push rod 32 moves downward to make the fourth rectangular plate 3 5 is kept horizontal with the center of the outer wall of the telescopic beam 4, and the two second brake motors 310 drive the second gear 39 to rotate. Because the two second gears 39 are meshed with the second rack 36, the second gear 39 rotates counterclockwise to drive the fourth rectangular plate 35 to push the center of the outer wall of the telescopic beam 4. Because the outer wall of the fourth rectangular plate 35 is a right-angled surface, it can push the telescopic beam 4 to overlap with the main beam. Similarly, it pushes another second fixing device 3 to cooperate with a second fixing device 3 to clamp and fix the telescopic beam 4, so that workers can perform welding. This device can flexibly install single or multiple telescopic beams 4, and when the telescopic beam 4 is corrected and adjusted with respect to the main beam, the main beam and the telescopic beam 4 can be fixed at the same time.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A welding tool for a telescopic beam structure of a sling, comprising a main beam assembly (1), a first fixing device (2), a second fixing device (3) and a telescopic beam (4), wherein the first fixing device (2) is fixedly provided on both the left and right sides of the top outer wall of the main beam assembly (1), and the second fixing device (3) is fixedly provided on both the front and rear sides of the top outer wall of the main beam assembly (1), and a plurality of telescopic beams (4) can be provided on the bottom surface of the main beam assembly (1), and the first fixing device (2) and the second fixing device (3) can cooperate with the telescopic beam (4) to adjust and fix the telescopic beam (4), thereby performing welding between the main beam assembly (1) and the telescopic beam (4); The main beam assembly (1) comprises a first concave plate (11), a first rectangular plate (12), a first groove (13), a second groove (14), a first round rod (110), a round plate (111), a second round rod (112), and a third groove (113); The top and bottom surfaces of the first concave plate (11) are both fixedly provided with a first rectangular plate (12), and the two first rectangular plates (12) are divided into a top end and a bottom end. The top centers of the two first rectangular plates (12) are both provided with a first groove (13) that is passed through vertically in the left-right direction. The front sides of the two first rectangular plates (12) are both provided with a plurality of equidistant second grooves (14) in the front-back direction, and the plurality of second grooves (14) are passed through vertically. The two first rectangular plates (12) are both divided into a plurality of small rectangular plates by the plurality of first grooves (13) and the second grooves (14). The small rectangular plates of a rectangular plate (12) are divided into two groups, front and rear. A plurality of first round rods (110) capable of sliding forward, backward, left and right are provided in the first groove (13) and the second groove (14) in the first rectangular plate (12) at the top. A circular plate (111) is fixedly provided on the top surface of the plurality of first round rods (110). A second round rod (112) is fixedly provided on the bottom surface of the plurality of first round rods (110). A third groove (113) is provided on the bottom surface of the plurality of second round rods (112). The third groove (113) matches the positioning pin at the center of the top surface of the telescopic beam (4).

2. The welding tool for the telescopic beam structure of a spreader according to claim 1, characterized in that: The main beam assembly (1) further comprises a first rectangular block (15), a second rectangular block (16), a second concave plate (17), a second rectangular plate (18) and a third rectangular block (19); The front ends of the top groups of several small rectangular plates of the first rectangular plate (12) at the bottom are all fixedly provided with one end of a first rectangular block (15), the other ends of the first rectangular blocks (15) are all fixedly provided on the bottom surfaces of the front groups of several small rectangular plates of the first rectangular plate (12) at the top, the top surface of the first rectangular plate (12) at the top is fixedly provided with a second concave plate (17), the top surface of the second concave plate (17) is fixedly provided with a second rectangular plate (18), the front ends of the top groups of several small rectangular plates of the first rectangular plate (12) at the top are all fixedly provided with one end of a second rectangular block (16), the other end of the second rectangular block (16) is fixedly provided on the bottom surface of the second rectangular plate (18), and the second rectangular plate (18) connects and fixes the front groups of several small rectangular plates of the two first rectangular plates (12), and the center of the top surface of the second rectangular plate (18) is fixedly provided with a third rectangular block (19).

3. The welding tool for the telescopic beam structure of a spreader according to claim 2, characterized in that: The plurality of first grooves (13) and the second grooves (14) of the two first rectangular plates (12) are interlaced and communicated with each other.

4. The welding tool for the telescopic beam structure of a spreader according to claim 3, characterized in that: The first fixing device (2) comprises a first electric push rod (21), a second electric push rod (22), a fourth rectangular block (23), a first cavity (24), a third rectangular plate (25), a first rack (26), a first rotating shaft (27), a first cylindrical block (28), a first gear (29) and a first brake motor (210); The first fixing device (2) is fixedly provided on both left and right sides of the outer wall of the third rectangular block (19); one end of a first electric push rod (21) is fixedly provided on the left side of the outer wall of the third rectangular block (19); the outer wall of one end of a second electric push rod (22) is fixedly provided on the other end of the first electric push rod (21); the fourth rectangular block (23) is fixedly provided on the other end of the second electric push rod (22); a first cavity (24) which is through-through to the left and right is provided in the fourth rectangular block (23); a third rectangular plate (25) which can move left and right is provided in the bottom end of the first cavity (24); first racks (26) are fixedly provided on both front and rear ends of the top of the third rectangular plate (25); A first rotating shaft (27) is sleeved in the center of the outer walls on both sides of the front and rear sides of the block (23), a first cylindrical block (28) is sleeved in the two first rotating shafts (27), a first gear (29) is fixedly provided at one end of the two first cylindrical blocks (28), and the first gear (29) is provided in the first cavity (24), the two first gears (29) are meshed with the first rack (26), and the two first gears (29) are located at one end of the first rotating shaft (27) and at a certain distance, a first brake motor (210) is fixedly provided at the other end of the two first rotating shafts (27), and the output end of the first brake motor (210) is connected and fixed to the other end of the first cylindrical block (28).

5. The welding tool for the telescopic beam structure of a spreader according to claim 4, characterized in that: The second fixing device (3) includes a third electric push rod (31), a fourth electric push rod (32), a fifth rectangular block (33), a second cavity (34), a fourth rectangular plate (35), a second rack (36), a second rotating shaft (37), a second cylindrical block, a second gear (39) and a second brake motor (310); The outer wall of the third rectangular block (19) is fixedly provided with a second fixing device (3) on both the front and rear sides. One end of a third electric push rod (31) is fixedly provided on the front side of the outer wall of the third rectangular block (19). The outer wall of one end of a fourth electric push rod (32) is fixedly provided on the other end of the third electric push rod (31). The other end of the fourth electric push rod (32) is fixedly provided with a fifth rectangular block (33). A second cavity (34) that passes through the front and rear is provided in the fifth rectangular block (33). A fourth rectangular plate (35) that can move forward and backward is provided in the bottom end of the second cavity (34). Second racks (36) are fixedly provided on both the left and right ends of the top surface of the fourth rectangular plate (35). A second rotating shaft (37) is sleeved in the center of the outer walls on the left and right sides of the fifth rectangular block (33), and a second cylindrical block is sleeved in the two second rotating shafts (37). A second gear (39) is fixedly provided at one end of the two second cylindrical blocks, and the second gear (39) is provided in the second cavity (34). The two second gears (39) are meshed with the second rack (36), and the two second gears (39) are located at one end of the second rotating shaft (37) and have a certain distance therefrom. A second brake motor (310) is fixedly provided at the other end of the two second rotating shafts (37), and the output end of the second brake motor (310) is connected and fixed to the other end of the second cylindrical block.

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