A multi-pipe welding assembly for pipe truss machining

Abstract

The application relates to a multi-pipe welding assembly for pipe truss machining and relates to the technical field of pipe truss welding, which comprises a rotary clamp for clamping a pipe truss, a plurality of pipe truss main rods are fixedly connected to the rotary clamp, and a welding robot and a feeding mechanical arm are arranged on one side of the rotary clamp; wherein the rotary clamp comprises a tool base frame, clamping end plates are symmetrically movably connected to the top of the tool base frame, a steering transmission device is arranged on the side of any one of the clamping end plates, and a sawtooth sliding rail strip is transmissionally matched below the steering transmission device; the clamping end plate comprises main support end plates symmetrically arranged at the two ends of the pipe truss main rod, a truss connecting plate is movably connected to the side of the main support end plate close to the pipe truss main rod, a truss lock frame is movably connected to the truss connecting plate, a positioning column corresponding to the pipe truss main rod is integrally arranged on the side of the truss lock frame, and the end of the positioning column is inserted into and matched with the end of the pipe truss main rod through the truss connecting plate.

Description

Technical Field

[0001] This invention relates to the field of tubular truss welding technology, and more specifically to a multi-tube welding assembly for tubular truss fabrication. Background Technology

[0002] A tubular truss steel structure is a spatial structural system that uses steel pipes as the main load-bearing components and connects them at nodes to form triangular units (trusses). The welding of tubular truss steel structures is centered on the connection of steel pipes (round pipes, square and rectangular pipes). In particular, the welding of intersecting nodes requires high precision equipment and pre-processing of the web members' ends. Generally, a CNC intersecting line cutting machine is used to cut the web members' ends to ensure a tight fit with the chord surface, and bevels are processed according to design requirements. Then, tooling fixtures (such as molds and positioning pins) are used to fix the relative positions of the chords and web members to ensure the geometric dimensions of the truss. Finally, appropriate welding equipment needs to be selected according to the welding method (such as intersecting line welding, bevel welding, corner welding, etc.), the material and thickness of the steel pipes, and then welding is carried out along the weld seam using a welding robot or manually.

[0003] A process for fabricating and welding a tubular truss steel structure, patent application number CN202110473586.3, includes a workbench, a fixing mechanism, an adjusting mechanism, a locking mechanism, and a rotating mechanism. The upper surface of the workbench is equipped with a fixing mechanism, which in turn is equipped with an adjusting mechanism and a rotating mechanism. The adjusting mechanism is equipped with a locking mechanism. The locking mechanism used in this invention can fix one end of the tubular truss to a positioning hollow column. Then, the spacing between the tubular truss rods fitted onto the positioning hollow column can be adjusted by the adjusting mechanism. This allows for fixing of tubular trusses of different sizes, facilitating the welding and forming of the tubular truss by the operator. At the same time, the rotating mechanism can drive the tubular truss to rotate.

[0004] However, when the aforementioned welding forming equipment welds tubular truss steel structures, it is necessary to use multiple jigs to fix the web members. Therefore, the web members need to be manually placed before welding, and the jigs need to be manually removed after welding. This process consumes a lot of time, which will affect the welding efficiency of tubular truss steel structures. Moreover, manual intervention is required when rotating the tubular truss. This requires long-term supervision of the welding process and timely rotation of the tubular truss steel structure. Otherwise, it will also affect the processing efficiency and increase the labor intensity of workers. Summary of the Invention

[0005] Technical problems to be solved

[0006] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide a multi-tube welding assembly for truss processing to solve the above-mentioned technical problems.

[0007] Technical solution

[0008] To achieve the objectives of this invention, the technical solution adopted is as follows:

[0009] A multi-tube welding assembly for processing tubular trusses includes a rotating clamp for holding the tubular trusses, and multiple tubular truss main rods are fixedly connected to the rotating clamp. A welding robot and a loading robotic arm are respectively provided on one side of the rotating clamp.

[0010] The rotary fixture includes a tooling base frame, with clamping end plates symmetrically and movably connected to the top of the tooling base frame. A steering transmission device is installed on the side of the clamping end plate at either end, and a serrated slide rail is engaged with the steering transmission device below it.

[0011] The clamping end plate includes main support end plates symmetrically arranged at both ends of the main tube truss. A truss connecting plate is movably connected to the side of the main support end plate near the main tube truss. A truss locking frame is movably connected to the truss connecting plate. The side of the truss locking frame is integrally provided with a positioning column corresponding to the main tube truss. The end of the positioning column passes through the truss connecting plate and is inserted into the end of the main tube truss.

[0012] As a further technical solution of the present invention, the truss connecting plate includes a connecting end plate attached to the end of the main member of the tubular truss, and the connecting end plate is provided with through holes in a rectangular array, and the positioning post on the side of the truss lock frame is inserted into the through hole.

[0013] The side of the truss lock frame is also fitted with a locking screw, and the end of the locking screw passes through the truss lock frame and is threaded into the connecting end plate.

[0014] As a further technical solution of the present invention, the main support end plate is provided with a mounting shaft hole, and the side of the connecting end plate is integrally provided with a stepped shaft, and the end of the stepped shaft is rotatably engaged with the mounting shaft hole. The top of the main support end plate is also provided with a vertical sliding hole communicating with the mounting shaft hole, and an elastic locking seat is installed in the vertical sliding hole.

[0015] As a further technical solution of the present invention, the elastic locking seat includes a limiting end cap threaded to the top of the vertical sliding hole, a compression spring provided at the bottom of the limiting end cap, and a friction brake block engaged at the bottom of the compression spring. The friction brake block is slidably engaged with the vertical sliding hole, and the end of the friction brake block extends to the inner side of the mounting shaft hole and fits against the top of the stepped shaft.

[0016] As a further technical solution of the present invention, the side of the main support end plate away from the main strut of the tubular truss is also fixedly connected with a corner bracket and an end shaft plate that are movably connected to the steering transmission.

[0017] The steering transmission includes a transmission worm gear with both ends rotatably engaged with a corner bracket and an end axle plate, wherein one end of the transmission worm gear passes through the end axle plate and is fixedly connected to a ratchet drive wheel.

[0018] As a further technical solution of the present invention, a transmission worm wheel is driven and fitted above the transmission worm gear, and a drive sprocket is coaxially fitted on one side of the transmission worm wheel. The two ends of the transmission worm wheel are rotatably fitted with the main support end plate and the corner bracket, respectively. A transmission sprocket is fixedly connected to the end of the stepped shaft above the drive sprocket, and a transmission chain is also driven and fitted between the transmission sprocket and the drive sprocket.

[0019] As a further technical solution of the present invention, the ratchet drive wheel includes a rotating roller located above the serrated slide rail, and the outer side of the rotating roller is provided with a mounting groove, and the inner side of the mounting groove is movably connected in a ring array with triangular rotating blocks that cooperate with the serrated slide rail.

[0020] Each of the aforementioned triangular rotating blocks has a pin penetrating its end, and the pins are arranged in a ring array inside the mounting groove, with both ends of the pins being fixedly connected to the rotating roller.

[0021] As a further technical solution of the present invention, the inner side of the mounting groove is also provided with an arc-shaped limiting groove corresponding to the triangular rotating block in a ring array, and the two arc-shaped limiting grooves are arranged as a group. Each of the triangular rotating blocks is fixedly connected to a sliding column corresponding to the arc-shaped limiting groove on both sides, and the sliding column slides in cooperation with the inner side of the arc-shaped limiting groove.

[0022] As a further technical solution of the present invention, each of the triangular rotating blocks is provided with a limiting slot on the side near the mounting groove. A metal spring corresponding to the triangular rotating block is placed on the inner side of the mounting groove. One end of the metal spring engages with the limiting slot on the side of the triangular rotating block, and the other end is fixedly connected to the inner side of the rotating roller.

[0023] (3) Beneficial effects:

[0024] A. In this invention, firstly, the distance between two main support end plates is adjusted according to the length of the main tube truss member. Then, multiple main tube truss members are placed between the two main support end plates in a rectangular array. Next, the truss locking frame on the side of the main support end plate is moved so that the positioning columns arranged in a rectangular array on the side of the truss locking frame are inserted into both ends of multiple main tube truss members to support and position them. Then, the tooling base frame moves multiple main tube truss members by clamping the end plates. At this time, the loading robot arm clamps the reinforcing web members and places them in a Z-shaped arrangement between any two main tube truss members. The welding robot welds the connection nodes between the main tube truss members and the reinforcing web members until the reinforcing web members are welded in a rectangular array from one end of the main tube truss member to the other end. The whole process is fully automated, improving work efficiency while reducing the labor intensity of workers.

[0025] B. In this invention, when the tooling base frame drives the clamping end plate for welding, the steering transmission on the side of the clamping end plate will move synchronously with the clamping end plate, causing the rotating roller to move above the sawtooth slide rail. At this time, the inclined surface of the triangular rotating block contacts the inclined surface of the sawtooth slide rail. Due to the guidance of the inclined surface, the triangular rotating block will swing towards the inside of the mounting groove around the pin shaft. At the same time, the compression spring in the vertical sliding hole will apply downward pressure to the friction brake block, causing the end of the friction brake block to be tightly pressed against the surface of the mounting shaft hole, preventing the mounting shaft hole from protruding. When the main tube truss is welded on one side and needs to be turned, the tooling base will drive the clamping end plate to move in the opposite direction. At this time, the vertical surface of the triangular rotating block will disengage from the vertical surface of the sawtooth slide rail, thereby causing the ratchet drive wheel to rotate. The ratchet drive wheel drives the transmission worm to rotate. Through the transmission cooperation between the transmission worm and the transmission worm wheel, the drive sprocket will rotate synchronously. At the same time, through the transmission cooperation between the transmission sprocket and the transmission chain, the truss connecting plate will rotate, thereby automatically flipping the main tube truss and further improving the degree of automation.

[0026] C. In this invention, when the triangular rotating block is rotated towards the inside of the mounting groove under force, the triangular rotating block will also drive the sliding column at the end to slide inside the arc-shaped limiting groove, thereby causing the triangular rotating block to slide above the sawtooth slide rail. When the triangular rotating block passes the apex of the sawtooth slide rail, the elasticity of the metal spring itself will push the triangular rotating block to rotate outward until the sliding column at the end of the triangular rotating block moves to the end of the arc-shaped limiting groove. The rotation position of the triangular rotating block is limited by the arc-shaped limiting groove. At the same time, it can also ensure that when the ratchet drive wheel moves back, the rotation roller can drive the transmission worm gear to rotate through the cooperation of the sawtooth slide rail and the triangular rotating block, thereby automatically flipping the surface.

[0027] D. In this invention, when adjusting the distance between the two main support end plates, an electric wrench can be used to rotate the compound threaded rod. Through the threaded engagement between the threaded hole at the bottom of the main support end plate and the compound threaded rod, the two main support end plates are moved. At the same time, the limiting sliding hole at the bottom of the main support end plate and the limiting sliding rod slide to limit the main support end plate, ensuring that the main support end plate can slide above the outer frame, thereby clamping the main poles of the truss of different lengths. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 In this invention Figure 1 A magnified view of a portion of the image;

[0030] Figure 3 In this invention Figure 1 Partial structural diagram;

[0031] Figure 4 In this invention Figure 3 A magnified view of a portion of the image;

[0032] Figure 5 This is a schematic diagram showing the positional structure of the clamping end plate and the steering transmission in this invention;

[0033] Figure 6 In this invention Figure 5 Another perspective view;

[0034] Figure 7 In this invention Figure 5 A schematic diagram of the split structure;

[0035] Figure 8 This is a top view of the ratchet drive wheel in this invention;

[0036] Figure 9 In this invention Figure 8 CC section view;

[0037] Figure 10 This is a schematic diagram of the disassembled structure of the ratchet drive wheel in this invention;

[0038] Figure 11 In this invention Figure 10 A magnified view of a portion of the image;

[0039] Figure 12 This is a three-dimensional structural diagram of the tooling base frame in this invention;

[0040] Figure 13 In this invention Figure 12 A magnified view of a portion of the image;

[0041] Figure 14 This is a schematic diagram of the disassembled structure of the main support end plate in this invention;

[0042] Figure 15 In this invention Figure 14 A magnified view of a portion of the image.

[0043] In the diagram: 1-Workbench, 2-Railway, 3-Welding robot, 4-Loading robotic arm, 5-Serrated slide rail, 6-Tooling base frame, 61-Outer frame, 62-Limiting slide rod, 63-Double threaded rod, 64-Support roller, 65-Intermediate reinforcing plate, 7-Clamping end plate, 71-Main support end plate, 711-Limiting slide hole, 712-Threaded hole, 713-Mounting shaft hole, 714-Vertical slide hole, 72-Truss connecting plate, 721-Connecting end plate, 722-Stepped shaft, 723-Through hole, 73-Truss lock frame, 74-Locking screw, 75-Elastic locking seat 751-Friction brake block, 752-Compression spring, 753-Limit end cap, 76-Corner bracket, 77-End shaft plate, 8-Steering transmission, 81-Transmission sprocket, 82-Transmission chain, 83-Drive sprocket, 84-Transmission worm gear, 85-Transmission worm, 86-Ratchet drive wheel, 861-Rotating roller, 862-Mounting groove, 863-Triangular rotating block, 864-Metal spring, 865-Pin rod, 866-Arc-shaped limit groove, 867-Limit slot, 868-Sliding column, 9-Trunk main rod, 10-Reinforced web member, 11-Straight module. Detailed Implementation

[0044] Please see Figure 1-7 A multi-tube welding assembly for processing tubular trusses includes a rotating clamp for holding the tubular trusses, and multiple tubular truss main rods 9 are fixedly connected to the rotating clamp. A welding robot 3 and a loading robotic arm 4 are respectively provided on one side of the rotating clamp.

[0045] The rotary fixture includes a tooling base frame 6, with a clamping end plate 7 symmetrically and movably connected above the tooling base frame 6. A steering transmission device 8 is installed on the side of the clamping end plate 7 at any end, and a serrated slide rail 5 is driven and engaged below the steering transmission device 8.

[0046] The clamping end plate 7 includes main support end plates 71 symmetrically arranged at both ends of the main tube truss 9. A truss connecting plate 72 is movably connected to the side of the main support end plate 71 near the main tube truss 9. A truss locking frame 73 is movably connected to the truss connecting plate 72. The side of the truss locking frame 73 is integrally provided with a positioning post corresponding to the main tube truss 9. The end of the positioning post passes through the truss connecting plate 72 and is inserted into the end of the main tube truss 9.

[0047] Furthermore, the truss connecting plate 72 includes a connecting end plate 721 that is attached to the end of the main member 9 of the tubular truss, and the connecting end plate 721 has through holes 723 arranged in a rectangular array, and the positioning post on the side of the truss lock frame 73 is inserted into the through hole 723.

[0048] The side of the truss lock frame 73 is also fitted with a locking screw 74, and the end of the locking screw 74 passes through the truss lock frame 73 and is threaded into the connecting end plate 721.

[0049] By adopting the above technical solution, firstly, the distance between the two main support end plates 71 is adjusted according to the length of the main truss member 9. Then, multiple main truss members 9 are placed between the two main support end plates 71 in a rectangular array. Next, the truss locking frame 73 on the side of the main support end plate 71 is moved so that the positioning columns arranged in a rectangular array on the side of the truss locking frame 73 are inserted into both ends of multiple main truss members 9 to support and position them. Then, the tooling base frame 6 moves multiple main truss members 9 by clamping the end plate 7. At this time, the loading robot arm 4 clamps the reinforcing web members 10 and places them in a Z-shaped arrangement between any two main truss members 9. The welding robot 3 welds the connection nodes between the main truss members 9 and the reinforcing web members 10 until the reinforcing web members 10 are welded in a rectangular array from one end of the main truss member 9 to the other end. The whole process is fully automated, improving work efficiency while reducing the labor intensity of workers.

[0050] In this embodiment, please refer to Figure 14-15 The main support end plate 71 is provided with a mounting shaft hole 713, and the side of the connecting end plate 721 is integrally provided with a stepped shaft 722, and the end of the stepped shaft 722 is rotatably engaged with the mounting shaft hole 713. The top of the main support end plate 71 is also provided with a vertical sliding hole 714 communicating with the mounting shaft hole 713, and an elastic locking seat 75 is installed in the vertical sliding hole 714.

[0051] Furthermore, the elastic locking seat 75 includes a limiting end cap 753 threadedly connected to the top of the vertical sliding hole 714. The bottom of the limiting end cap 753 is provided with a compression spring 752, and the bottom of the compression spring 752 is engaged with a friction brake block 751. The friction brake block 751 slides with the vertical sliding hole 714, and the end of the friction brake block 751 extends to the inner side of the mounting shaft hole 713 and fits against the top of the stepped shaft 722.

[0052] By adopting the above technical solution, when adjusting the distance between the two main support end plates 71, an electric wrench can be used to rotate the compound threaded rod 63. Through the threaded engagement between the threaded hole 712 at the bottom of the main support end plate 71 and the compound threaded rod 63, the two main support end plates 71 at both ends are moved. At the same time, the limiting sliding hole 711 at the bottom of the main support end plate 71 and the limiting sliding rod 62 are slidably engaged to limit the main support end plate 71, ensuring that the main support end plate 71 can slide above the outer frame 61, thereby clamping the main tube truss rods 9 of different lengths.

[0053] In this embodiment, please refer to Figure 8-11 The main support end plate 71 is also fixedly connected to a corner bracket 76 and an end shaft plate 77 on the side away from the main tube truss 9, which are movably connected to the steering transmission device 8.

[0054] The steering transmission device 8 includes a transmission worm 85 with both ends rotatably engaged with the corner bracket 76 and the end axle plate 77, respectively. One end of the transmission worm 85 passes through the end axle plate 77 and is fixedly connected to a ratchet drive wheel 86.

[0055] Furthermore, a transmission worm wheel 84 is driven and fitted above the transmission worm 85, and a drive sprocket 83 is coaxially fitted on one side of the transmission worm wheel 84. The two ends of the transmission worm wheel 84 are rotatably fitted with the main support end plate 71 and the corner bracket 76, respectively. A transmission sprocket 81 is fixedly connected to the end of the stepped shaft 722 above the drive sprocket 83, and a transmission chain 82 is also driven and fitted between the transmission sprocket 81 and the drive sprocket 83.

[0056] More specifically, the ratchet drive wheel 86 includes a rotating roller 861 located above the serrated slide rail 5, and the outer side of the rotating roller 861 is provided with a mounting groove 862, and the inner side of the mounting groove 862 is movably connected in a ring array with a triangular rotating block 863 that cooperates with the serrated slide rail 5.

[0057] Each of the aforementioned triangular rotating blocks 863 has a pin 865 extending through its end, and the pins 865 are arranged in a ring array inside the mounting groove 862, and both ends of the pins 865 are fixedly connected to the rotating roller 861.

[0058] Furthermore, the inner side of the mounting groove 862 is provided with an arc-shaped limiting groove 866 corresponding to the triangular rotating block 863 in a ring array, and the two arc-shaped limiting grooves 866 are arranged as a group. Each of the triangular rotating blocks 863 has a sliding column 868 corresponding to the arc-shaped limiting groove 866 fixedly connected to both sides, and the sliding column 868 slides in cooperation with the inner side of the arc-shaped limiting groove 866.

[0059] Furthermore, each of the aforementioned triangular rotating blocks 863 has a limiting slot 867 on the side near the mounting groove 862. The inner side of the mounting groove 862 is also provided with a metal spring 864 corresponding to the triangular rotating block 863. One end of the metal spring 864 is engaged with the limiting slot 867 on the side of the triangular rotating block 86, and the other end is fixedly connected to the inner side of the rotating roller 861.

[0060] By adopting the above technical solution, when the tooling base frame 6 drives the clamping end plate 7 for welding, the steering transmission 8 on the side of the clamping end plate 7 will move synchronously with the clamping end plate 7, causing the rotating roller 861 to move above the sawtooth slide rail 5. At this time, the inclined surface of the triangular rotating block 863 contacts the inclined surface of the sawtooth slide rail 5. Due to the guidance of the inclined surface, the triangular rotating block 863 will swing towards the inside of the mounting groove 862 around the pin shaft 865. At the same time, the compression spring 75 in the vertical sliding hole 714 will apply downward pressure to the friction brake block 751, so that the end of the friction brake block 751 is tightly attached to the surface of the mounting shaft hole 713, preventing... When the mounting shaft hole 713 rotates, and the welding of one side of the main tube truss 9 is completed and a turn is required, the tooling base frame 6 will drive the clamping end plate 7 to move in the opposite direction for a return stroke. At this time, the vertical surface of the triangular rotating block 863 will disengage from the vertical surface of the sawtooth slide rail 5, thereby causing the ratchet drive wheel 86 to rotate. The ratchet drive wheel 86 drives the transmission worm 85 to rotate. Through the transmission cooperation between the transmission worm 85 and the transmission worm wheel 84, the drive sprocket 83 will rotate synchronously. At the same time, through the transmission cooperation between the transmission sprocket 81 and the transmission chain 82, the truss connecting plate 72 will rotate, thereby automatically flipping the main tube truss 9 and further improving the degree of automation.

[0061] In this embodiment, please refer to Figure 12-13 The tooling base frame 6 includes an outer frame 61, a compound threaded rod 63 is movably connected to the middle position of the outer frame 61, and one end of the compound threaded rod 63 extends through the outer frame 61 to the outside of the outer frame 61. The bottom of the main support end plate 71 is provided with a threaded hole 712, and the compound threaded rod 63 is threadedly engaged with the threaded hole 712.

[0062] The outer frame 61 is fixedly connected to both sides of the limiting slide rod 62, and the bottom of the main support end plate 71 is also symmetrically provided with limiting slide holes 711, and the limiting slide rod 62 and the limiting slide hole 711 are slidably engaged.

[0063] Furthermore, both sides of the outer frame 61 are movably connected with support rollers 64 in a rectangular array, and each support roller 64 is provided with a track 2 below it. A middle reinforcing plate 65 is integrally provided in the middle of the support rollers 64. A straight module 11 is also provided below the outer frame 61, and the straight module 11 is fixedly connected to the bottom of the middle reinforcing plate 65.

[0064] By adopting the above technical solution, when the triangular rotating block 863 is rotated inward towards the mounting groove 86, the triangular rotating block 863 will also drive the sliding column 868 at its end to slide inside the arc-shaped limiting groove 866, thereby allowing the triangular rotating block 863 to slide above the serrated slide rail 5. When the triangular rotating block 863 passes the apex of the serrated slide rail 5, the elasticity of the metal spring 864 will push the triangular rotating block 86 to rotate outward until the sliding column 868 at the end of the triangular rotating block 863 moves to the end of the arc-shaped limiting groove 866. The arc-shaped limiting groove 866 limits the rotation position of the triangular rotating block 863. At the same time, it can also ensure that when the ratchet drive wheel 86 moves back, the rotation roller 861 can drive the transmission worm gear 84 to rotate through the cooperation of the serrated slide rail 5 and the triangular rotating block 863, thereby automatically flipping the surface.

[0065] Furthermore, a workbench 1 is provided at the bottom of the track 2, and the track 2 is symmetrically fixedly connected above the workbench 1. The welding robot 3 and the loading robotic arm 4 are respectively fixedly connected above the workbench 1.

[0066] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A multi-tube welding assembly for processing tubular trusses, characterized in that: It includes a rotating clamp for holding the tubular truss, and multiple tubular truss main rods (9) are fixedly connected to the rotating clamp, while a welding robot (3) and a loading robot arm (4) are respectively provided on one side of the rotating clamp. The rotary fixture includes a tooling base frame (6), and a clamping end plate (7) is symmetrically and movably connected above the tooling base frame (6). A steering transmission device (8) is installed on the side of the clamping end plate (7) at any end, and a sawtooth slide rail (5) is driven and engaged below the steering transmission device (8). The clamping end plate (7) includes main support end plates (71) symmetrically arranged at both ends of the main tube truss (9), and a truss connecting plate (72) is movably connected to the side of the main tube truss (9) of the main support end plate (71), and a truss locking frame (73) is movably connected to the truss connecting plate (72). The side of the truss locking frame (73) is integrally provided with a positioning column corresponding to the main tube truss (9), and the end of the positioning column passes through the truss connecting plate (72) and is inserted into the end of the main tube truss (9). The main support end plate (71) is also fixedly connected to a corner bracket (76) and an end shaft plate (77) that are movably connected to the steering transmission device (8) on the side away from the main tube truss rod (9). The steering transmission (8) includes a transmission worm (85) with both ends rotatably engaged with the corner bracket (76) and the end shaft plate (77) respectively. One end of the transmission worm (85) passes through the end shaft plate (77) and is fixedly connected to a ratchet drive wheel (86). The transmission worm (85) is equipped with a transmission worm wheel (84) on its upper part, and a drive sprocket (83) is coaxially equipped on one side of the transmission worm wheel (84). The two ends of the transmission worm wheel (84) are rotatably equipped with the main support end plate (71) and the corner bracket (76) respectively. The drive sprocket (83) is equipped with a transmission sprocket (81) fixedly connected to the end of the stepped shaft (722) on its upper part, and a transmission chain (82) is also equipped between the transmission sprocket (81) and the drive sprocket (83).

2. The multi-tube welding assembly for truss fabrication as described in claim 1, characterized in that: The truss connecting plate (72) includes a connecting end plate (721) attached to the end of the main member (9) of the tubular truss, and the connecting end plate (721) has through holes (723) arranged in a rectangular array, and the positioning post on the side of the truss lock frame (73) is inserted into the through hole (723). The side of the truss lock frame (73) is also fitted with a locking screw (74), and the end of the locking screw (74) passes through the truss lock frame (73) and is threaded into the connecting end plate (721).

3. The multi-tube welding assembly for tubular truss fabrication as described in claim 2, characterized in that: The main support end plate (71) is provided with a mounting shaft hole (713), and the side of the connecting end plate (721) is integrally provided with a stepped shaft (722), and the end of the stepped shaft (722) is rotatably engaged with the mounting shaft hole (713). The top of the main support end plate (71) is also provided with a vertical sliding hole (714) communicating with the mounting shaft hole (713), and an elastic locking seat (75) is installed in the vertical sliding hole (714).

4. The multi-tube welding assembly for tubular truss fabrication as described in claim 3, characterized in that: The elastic locking seat (75) includes a limiting end cap (753) threaded to the top of the vertical sliding hole (714). The bottom of the limiting end cap (753) is provided with a compression spring (752), and the bottom of the compression spring (752) is engaged with a friction brake block (751). The friction brake block (751) slides with the vertical sliding hole (714), and the end of the friction brake block (751) extends to the inner side of the mounting shaft hole (713) and fits against the top of the stepped shaft (722).

5. The multi-tube welding assembly for truss fabrication as described in claim 1, characterized in that: The ratchet drive wheel (86) includes a rotating roller (861) located above the serrated slide rail (5), and the outer side of the rotating roller (861) is provided with a mounting groove (862), and the inner side of the mounting groove (862) is movably connected in a ring array with a triangular rotating block (863) that cooperates with the serrated slide rail (5). Each of the aforementioned triangular rotating blocks (863) has a pin (865) extending through its end, and the pins (865) are arranged in a ring array inside the mounting groove (862), and both ends of the pins (865) are fixedly connected to the rotating roller (861).

6. The multi-tube welding assembly for tubular truss fabrication as described in claim 5, characterized in that: The inner side of the mounting groove (862) is also provided with an arc-shaped limiting groove (866) corresponding to the triangular rotating block (863) in a ring array, and the two arc-shaped limiting grooves (866) are set together. Each of the triangular rotating blocks (863) has a sliding column (868) corresponding to the arc-shaped limiting groove (866) fixedly connected on both sides, and the sliding column (868) slides in cooperation with the inner side of the arc-shaped limiting groove (866).

7. The multi-tube welding assembly for tubular truss fabrication as described in claim 6, characterized in that: Each of the aforementioned triangular rotating blocks (863) has a limiting slot (867) on one side near the mounting groove (862). The inner side of the mounting groove (862) is also provided with a metal spring (864) corresponding to the triangular rotating block (863). One end of the metal spring (864) is engaged with the limiting slot (867) on the side of the triangular rotating block (863), and the other end is fixedly connected to the inner side of the rotating roller (861).

8. The multi-tube welding assembly for tubular truss fabrication as described in claim 7, characterized in that: The tooling base frame (6) includes an outer frame (61), a compound threaded rod (63) is movably connected to the middle position of the outer frame (61), and one end of the compound threaded rod (63) extends through the outer frame (61) to the outside of the outer frame (61). The bottom of the main support end plate (71) is provided with a threaded hole (712), and the compound threaded rod (63) is threadedly engaged with the threaded hole (712). The outer frame (61) is fixedly connected to both sides of the limiting slide rod (62), and the bottom of the main support end plate (71) is symmetrically provided with limiting slide holes (711), and the limiting slide rod (62) slides in cooperation with the limiting slide hole (711).

Images