A welding device and process for a main beam of an electric tricycle

Abstract

The application discloses an electric tricycle main beam welding device and process, and particularly relates to the field of tricycle main beam welding, which comprises a rack, two symmetrical stand columns are fixedly connected to the rack, a turnover frame is rotatably connected between the stand columns, one of the stand columns is fixedly connected with a single-axle differential, the output end of the single-axle differential is fixedly connected with one end of the turnover frame, the single-axle differential is used for driving the turnover frame to rotate, two symmetrical sliding grooves one, two symmetrical sliding grooves two and a plurality of air injection holes are formed in the turnover frame, a gas conveying pipe is fixedly connected to the turnover frame, and the gas conveying pipe is used for connecting the air injection holes; one end of the turnover frame is provided with a driving assembly one, and the output end of the driving assembly one is connected with two symmetrical threaded rods one. The application is provided with the fixed frame, the shearing type connecting frame and the plurality of moving frames in the synchronous module through the driving assembly one, the number of driving components is reduced, the position consistency between the positioning datum blocks is improved, and the precision of the beam welding positioning is ensured.

Description

Technical Field

[0001] This invention relates to the field of welding technology for the main beam of a tricycle, and more specifically, to a welding device and process for the main beam of an electric tricycle. Background Technology

[0002] As the core load-bearing structure of the entire vehicle, the welding quality of the main beam of an electric tricycle directly determines the vehicle's safety performance and service life. The main beam is usually composed of two longitudinal main beams and multiple transverse connecting beams, which are assembled by welding. During the welding process, each beam to be welded needs to be precisely positioned and clamped to ensure accurate weld position and controllable welding deformation. Therefore, the welding device for the main beam of an electric tricycle is a key piece of equipment for achieving high-quality welding operations.

[0003] Chinese Patent Publication No. CN118875633B discloses a welding platform for the main beam of an electric tricycle, including a base. A tilting device is fixedly connected to the left side of the upper surface of the base, and a limiting device is fixedly connected to the right side of the upper surface of the base. A frame is fixedly connected to the side of the tilting device near the limiting device, and the side of the frame away from the tilting device is fixedly connected to the limiting device. A first displacement device is fixedly connected to the inner cavity of the frame, and a fourth displacement device is fixedly connected to the upper surface of the first displacement device. A first fixing device is fixedly connected to the upper surface of the fourth displacement device. The cavity is fixedly connected to a third displacement device, the upper surface of which is fixedly connected to a second displacement device, and the upper surface of which is fixedly connected to a second fixing device. The third displacement device is located below the first displacement device. Although the above scheme can achieve the positioning and welding of the main beam, its structure is relatively complex, with multiple sets of displacement and fixing devices. The large number of precision components not only significantly increases the cost of the equipment, but also accumulates the manufacturing and assembly errors of each component, ultimately affecting the welding positioning accuracy of the main beam. Furthermore, troubleshooting and daily maintenance are time-consuming and labor-intensive, which is not conducive to improving production efficiency and equipment economy.

[0004] In summary, to significantly simplify the equipment structure, reduce manufacturing costs and maintenance difficulty while ensuring the positioning accuracy of the main beam and crossbeam, it is necessary to solve the problems of structural complexity, error accumulation and multiple failure points caused by the stacking of multiple independent displacement devices and fixing devices in the existing welding platform. This would enable the main beam welding device to have multi-directional flexible adjustment capabilities while achieving synchronous and precise adjustment of each positioning reference block through a more streamlined linkage mechanism. Summary of the Invention

[0005] The present invention provides a welding device and process for the main beam of an electric tricycle, which aims to solve the problem that the existing welding platform has a complex structure, accumulated errors, and many failure points due to the stacking of multiple independent shifting devices and fixing devices.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding device for the main beam of an electric tricycle, comprising a frame, two symmetrical columns fixedly connected to the frame, a tilting frame rotatably connected between the columns, a single-axle differential fixedly connected to one of the columns, the output end of the single-axle differential being fixedly connected to one end of the tilting frame, the single-axle differential being used to drive the tilting frame to rotate, the tilting frame having two symmetrical first grooves, two symmetrical second grooves and several air jet holes, an air supply pipe fixedly connected to the tilting frame, the air supply pipe being used to connect to each air jet hole; One end of the tilting frame is equipped with a drive assembly, and the output end of the drive assembly is connected to two symmetrical threaded rods. The drive assembly is used to drive the two threaded rods to rotate synchronously. A side sliding frame is provided on the outside of the threaded rods, and the side sliding frame is fixedly connected to the tilting frame. A synchronization module is connected to the threaded rods. The other end of the tilting frame is equipped with a second drive assembly. The output end of the second drive assembly is connected to two symmetrical threaded rods. The second drive assembly is used to drive the two threaded rods to rotate synchronously. A slider is threadedly connected to the threaded rod, and a connecting rod is fixedly connected to the slider. The slider is slidably connected in the groove. The synchronization module includes a fixed frame fixedly connected to the center of the flipping frame, a shearing connecting frame mounted on the fixed frame, and several movable frames mounted on the shearing connecting frame. The movable frames and the slide are slidably connected, and the movable frame at the far end is threadedly connected to the threaded rod.

[0007] In a preferred embodiment, two horizontal sliding frames are fixedly connected to the tilting frame, and a dual-axis differential is fixedly connected to one of the horizontal sliding frames. Two symmetrical threaded rods are fixedly connected to the output end of the dual-axis differential. The dual-axis differential is used to drive the two threaded rods to rotate synchronously. A dual-station linear module is threadedly connected to the threaded rods, and a connecting rod is fixedly connected to the dual-station linear module.

[0008] In a preferred embodiment, the drive assembly includes a servo motor fixedly connected to the tilting frame, a synchronous pulley fixedly connected to the output end of the servo motor by a shaft, a synchronous belt sleeved on the outside of the synchronous pulley, and two synchronous pulleys respectively sleeved on both ends of the synchronous belt. The synchronous pulleys are fixedly connected to the threaded rod, and the servo motor is used to drive the synchronous pulley to rotate.

[0009] In a preferred embodiment, the drive assembly 2 includes a servo motor 2 fixedly connected to the tilting frame, a bevel gear 1 fixedly connected to the output end of the servo motor 2 via a shaft, and two bevel gears 2 meshing with each other on both sides of the bevel gear 1. The bevel gears 2 and the threaded rod 2 are fixedly connected, and the servo motor 2 is used to drive the bevel gear 1 to rotate.

[0010] In a preferred embodiment, two positioning reference blocks are installed on the fixed frame, the movable frame, and the dual-station linear module. The positioning reference blocks have through holes, and connecting rod one and connecting rod two are slidably connected to the through holes. Two symmetrical sliding holes are opened on one side of the positioning reference blocks. An electric push rod two is fixedly connected to one side of the positioning reference blocks. A side pressure plate is fixedly connected to the output end of the electric push rod two. Two symmetrical guide rods two are fixedly connected to the side pressure plate near the sliding holes. The guide rods two are slidably connected to the sliding holes. A compression spring is fixedly connected between the guide rods two and the positioning reference blocks. The electric push rod two is used to drive the side pressure plate to move along the sliding holes.

[0011] In a preferred embodiment, a servo motor three is fixedly connected to the positioning reference block, and an electric push rod three is fixedly connected to the output end of the servo motor three. The servo motor three is used to drive the electric push rod three to rotate. A top pressure plate is fixedly connected to the output end of the electric push rod three. The electric push rod three is used to drive the top pressure plate to move in the vertical direction. Heat insulation pads are fixedly connected to the contact surfaces of the positioning reference block and the contact surfaces of the side pressure plate. A heat sink block is fixedly connected to the side of the positioning reference block away from the side pressure plate. The heat sink block is provided with several heat sink fins.

[0012] In a preferred embodiment, an electric push rod four is fixedly connected inside the positioning reference block, and a pressure column is fixedly connected to the output end of the electric push rod four. The pressure column is provided with an arc-shaped groove. The electric push rod four is used to drive the pressure column to move, so that the arc-shaped groove cooperates with the through hole to lock the connecting rod one or connecting rod two that is slidably connected in the through hole.

[0013] In a preferred embodiment, a center-of-gravity balancing frame is fixedly connected to the bottom of the tilting frame. A center-of-gravity detector is fixedly connected to each of the four corners of the center-of-gravity balancing frame. The center-of-gravity detector is used to detect changes in the center of gravity of the tilting frame in real time. Several center-of-gravity balancing components are installed inside the center-of-gravity balancing frame. The center-of-gravity balancing components include a winding motor 1 fixedly connected to one end of the center-of-gravity balancing frame, a winding motor 2 fixedly connected to the other end of the center-of-gravity balancing frame, a steel cable installed between the winding motor 1 and the winding motor 2, and a counterweight fixedly connected to the steel cable. The counterweight is slidably connected inside the center-of-gravity balancing frame. The winding motor 1 and the winding motor 2 drive the counterweight to move through the steel cable to adjust the center of gravity.

[0014] In a preferred embodiment, the movable frame is provided with two symmetrical limiting grooves, and two symmetrical locking components are installed in the first sliding groove. The locking components include an electric push rod fixedly connected in the first sliding groove, a wedge-shaped locking block fixedly connected to the output end of the electric push rod, several guide rods fixedly connected to the side of the wedge-shaped locking block away from the electric push rod, and several sliding sleeves fixedly connected to the first sliding groove. The sliding sleeves and the guide rods are slidably connected. The electric push rod is used to drive the wedge-shaped locking block to move, so that the wedge-shaped locking block is embedded or disengaged from the limiting groove.

[0015] When using the welding process for the main beam of an electric tricycle according to this technical solution, the electric tricycle main beam welding device described above is employed, and the steps are as follows: S1: Start drive component one. Servo motor one drives synchronous wheel one to rotate. Then, through synchronous belt, it drives two synchronous wheels two to rotate, thereby realizing the synchronous rotation of two threaded rods one. Threaded rod one drives the outermost moving frame to slide along slide groove one. The outermost moving frame drives the other moving frames to move synchronously and equidistantly through shear-type connecting frame, realizing the width adjustment between each positioning reference block. At the same time, start drive component two. Servo motor two drives two threaded rods two to rotate synchronously through bevel gear one and bevel gear two. Threaded rod two drives connecting rod one to move through slider. Connecting rod one drives each positioning reference block to slide along through hole, realizing the length adjustment between each positioning reference block, so that each positioning reference block moves to the designated position for installing each crossbeam. S2: Start the dual-shaft differential. The dual-shaft differential drives the two threaded rods to rotate synchronously. The threaded rods drive the dual-station linear module to move along the transverse sliding frame to the designated position. The dual-station linear module drives the positioning reference block installed at its output end to move to the designated position for installing the two main beams. S3: After each positioning reference block is moved into place, the electric push rod one first drives the wedge-shaped locking block to move, so that the wedge-shaped locking block is embedded in the limiting groove and locks the moving frame. Then the electric push rod four pushes the pressure column to move, so that the arc groove cooperates with the through hole and locks the connecting rod one and connecting rod two that are slidably connected in the through hole. S4: Place each crossbeam and the two main beams on the corresponding positioning reference blocks. Then, the electric push rod two drives the side pressure plate to extend along the sliding hole. At the same time, the servo motor three drives the electric push rod three to rotate. The electric push rod three drives the top pressure plate to move in the vertical direction, so that the side pressure plate and the top pressure plate press and fix the crossbeam and the main beam respectively. S5: Welding operation is carried out. At the same time, the gas supply pipe is connected to an external gas source and protective gas is sprayed into the welding area through each jet hole to form a protective gas curtain. At the same time, the airflow blows towards the heat dissipation fins to dissipate heat from the positioning reference block. S6: For areas that cannot be directly reached by the welding position, activate the single-axis differential. The single-axis differential drives the tilting frame to rotate around the column, tilting the area to be welded to an exposed position to facilitate welding operations. During the tilting process, the center of gravity detectors at the four corners of the center of gravity balance frame detect the changes in the center of gravity of the tilting frame in real time and transmit the detection signals to the external controller. The external controller controls each winding motor 1 and winding motor 2 to drive the counterweight blocks to move within the center of gravity balance frame through steel cables, thereby adjusting the center of gravity balance of the tilting frame.

[0016] The beneficial effects of this invention are as follows: 1. This invention significantly reduces the number of drive components by using a drive assembly in conjunction with a fixed frame, a shear-type connecting frame, and multiple moving frames in the synchronization module. This reduces the manufacturing cost of the equipment from the source, while also reducing the accumulation of assembly errors caused by multiple independent drive units, improving the positional consistency between each positioning reference block, and ensuring the accuracy of beam welding positioning.

[0017] 2. This invention sets a limiting groove on the moving frame and a locking component in the sliding groove. At the same time, the electric push rod drives the pressure column to lock the connecting rod one and the connecting rod two by cooperating with the arc groove and the through hole. The double locking structure ensures that the positioning reference block will not shift in position due to vibration or external force during the welding process, effectively avoiding welding deviation caused by the movement of the positioning reference block, and significantly improving the stability and repeatability of the welding process.

[0018] 3. This invention effectively blocks the high temperature of welding from being conducted to the positioning reference block and the side pressure plate by setting heat insulation pads on the contact surfaces of the positioning reference block and the workpiece, as well as the contact surfaces of the side pressure plate. This prevents the fixture from being damaged by high temperature due to heat conduction. At the same time, the positioning reference block is equipped with a heat dissipation block with heat dissipation fins inside, which can quickly conduct the heat absorbed by the positioning reference block and dissipate it through the heat dissipation fins. This achieves dual thermal protection of heat insulation and heat dissipation, effectively preventing the positioning reference block from thermal deformation due to heat accumulation, and ensuring the positioning accuracy and service life of the fixture during long-term continuous welding operations.

[0019] 4. This invention sets the gas supply pipe and jet nozzle on the flipping frame. During welding, the gas supply pipe is connected to an external gas source, and the jet nozzle sprays protective gas into the welding area to form a protective air curtain to protect the moving parts. At the same time, the sprayed airflow blows onto the heat dissipation fins to force the positioning reference block to cool down. The same set of air circuit structure realizes both welding protection and fixture cooling functions at the same time. There is no need to add an additional protective air cover or heat dissipation device. The structure is compact and the function is highly integrated, which reduces the complexity of the equipment and the manufacturing cost.

[0020] 5. This invention sets a center-of-gravity balancing frame at the bottom of the flipping frame, and sets center-of-gravity detectors at the four corners of the center-of-gravity balancing frame to detect the vibration differences at each corner of the flipping frame in real time to determine the direction and amount of center-of-gravity offset. This allows the flipping frame to maintain balance and stability at any flipping angle, effectively avoiding the flipping shaking and off-center load problems caused by the center-of-gravity offset due to uneven workpiece weight distribution, and improving the safety, stability and welding quality during flipping welding. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the flipping frame structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the shear-type connecting frame structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the locking component structure of the present invention. Figure 1 .

[0025] Figure 5 This is a schematic diagram of the locking component structure of the present invention. Figure 2 .

[0026] Figure 6 This is a schematic diagram of the second driving component of the present invention.

[0027] Figure 7 This is a schematic diagram of the center of gravity balancing component structure of the present invention.

[0028] Figure 8 This is a schematic diagram of the dual-station linear module structure of the present invention.

[0029] Figure 9 This is a schematic diagram of the positioning reference block structure of the present invention.

[0030] Figure 10 This is a schematic diagram of the pressure column structure of the present invention.

[0031] Figure 11 This is a schematic diagram of the side pressure plate structure of the present invention.

[0032] The attached diagram is labeled as follows: 1. Frame; 2. Column; 3. Single-shaft differential; 4. Tilting frame; 401. Slide groove one; 402. Slide groove two; 403. Air jet; 501. Servo motor one; 502. Synchronous pulley one; 503. Synchronous belt; 504. Synchronous pulley two; 6. Threaded rod one; 7. Side sliding frame; 801. Fixed frame; 802. Shear-type connecting frame; 803. Moving frame; 8031. Limiting groove; 901. Electric push rod one; 902. Wedge-shaped locking block; 903. Guide rod one; 904. Sliding sleeve; 1001. Servo motor two; 1002. Bevel gear one; 1003. Bevel gear two; 11. Threaded rod two; 12. Slider; 13. Connecting rod one; 14. Horizontal 15. Sliding frame; 16. Dual-axis differential; 17. Threaded rod three; 18. Dual-station linear module; 19. Connecting rod two; 10. Positioning reference block; 1901. Through hole; 1902. Sliding hole; 20. Electric push rod two; 21. Side pressure plate; 22. Guide rod two; 23. Compression spring; 24. Heat insulation pad; 25. Heat sink block; 26. Heat sink fins; 27. Servo motor three; 28. Electric push rod three; 29. ​​Top pressure plate; 30. Electric push rod four; 31. Pressure column; 3101. Arc groove; 32. Center of gravity balance frame; 33. Center of gravity detector; 3401. Winding motor one; 3402. Winding motor two; 3403. Steel cable; 3404. Counterweight block; 35. Air supply pipe. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0034] Refer to the instruction manual appendix Figures 1 to 11 An electric tricycle main beam welding device includes a frame 1, on which two symmetrical columns 2 are fixedly connected, and a tilting frame 4 is rotatably connected between the columns 2. A single-axle differential 3 is fixedly connected to one of the columns 2, and the output end of the single-axle differential 3 is fixedly connected to one end of the tilting frame 4. The single-axle differential 3 is used to drive the tilting frame 4 to rotate. The tilting frame 4 has two symmetrical sliding grooves 401, two symmetrical sliding grooves 402, and several air jet holes 403. An air supply pipe 35 is fixedly connected to the tilting frame 4 and is used to connect to each air jet hole 403. One end of the tilting frame 4 is equipped with a drive assembly 1. The output end of the drive assembly 1 is connected to two symmetrical threaded rods 6. The drive assembly is used to drive the two threaded rods 6 to rotate synchronously. A side sliding frame 7 is provided on the outside of the threaded rods 6. The side sliding frame 7 is fixedly connected to the tilting frame 4. A synchronization module is connected to the threaded rods 6. The other end of the flipping frame 4 is equipped with a second drive assembly. The output end of the second drive assembly is connected to two symmetrical threaded rods 11. The second drive assembly is used to drive the two threaded rods 11 to rotate synchronously. A slider 12 is threadedly connected to the threaded rod 11. A connecting rod 13 is fixedly connected to the slider 12. The slider 12 is slidably connected in the slide groove 402. The synchronization module includes a fixed frame 801 fixedly connected to the center of the flipping frame 4, a shearing connecting frame 802 installed on the fixed frame 801, and several movable frames 803 installed on the shearing connecting frame 802. The movable frames 803 are slidably connected to the slide groove 401, and the movable frame 803 at the far end is threadedly connected to the threaded rod 6.

[0035] It should be noted that the frame 1 serves as the mounting foundation for the entire device, providing a stable support platform for welding operations. Two uprights 2 are symmetrically fixed to the frame 1, and a single-shaft differential 3 is fixed to one of the uprights 2. The output end of the single-shaft differential 3 is fixed to one end of the tilting frame 4 to drive the tilting frame 4 to rotate around the axis of the upright 2, thereby adjusting the angle of the tilting frame 4. The other upright 2 is rotatably connected to the other end of the tilting frame 4, providing rotational support for the tilting frame 4. The tilting frame 4 has an overall frame structure, providing a mounting carrier for various components. Two symmetrical sliding grooves (401) are provided on the tilting frame 4. The sliding blocks 12 are guided and limited by the sliding blocks 12. Two slide grooves 402 are symmetrically distributed at both ends of the tilting frame 4 and perpendicular to the slide groove 401. Several air jet holes 403 are distributed on the inner wall of the tilting frame 4 and connected to the air supply pipe 35. The air supply pipe 35 is fixed on the tilting frame 4 and one end extends out for connecting to an external air source. The air supply pipe 35 delivers the gas provided by the external air source to each air jet hole 403. The air jet hole 403 sprays out protective gas to form a protective air curtain, and at the same time, the airflow blows to dissipate heat from the surrounding components. Drive assembly one is installed at one end of the tilting frame 4. Drive assembly one has two output ends, which are respectively fixed to two threaded rods 6. Drive assembly one is used to drive the two threaded rods 6 to rotate synchronously and in the same direction. The two threaded rods 6 are symmetrically arranged on both sides of the tilting frame 4. A side sliding frame 7 is sleeved on the outer side of the threaded rods 6. The side sliding frame 7 is fixed on the tilting frame 4. The side sliding frame 7 provides rotational support and axial limit for the threaded rods 6, ensuring the stability of the rotation of the threaded rods 6. Drive assembly two is installed at the other end of the tilting frame 4. The second drive assembly has two output ends and is fixedly connected to two threaded rods 11 respectively. The second drive assembly is used to drive the two threaded rods 11 to rotate synchronously in the same direction. The two threaded rods 11 are symmetrically arranged on both sides of the flipping frame 4. A slider 12 is threadedly connected to the threaded rod 11. The slider 12 is slidably connected in the slide groove 402. When the threaded rod 11 rotates, the slider 12 slides back and forth along the extension direction of the slide groove 402. A connecting rod 13 is fixedly connected to the slider 12. The connecting rod 13 moves synchronously with the slider 12.

[0036] It is worth noting that the fixed frame 801 is fixed at the center of the flipping frame 4 as the fixed reference for the synchronization module. The shearing connecting frame 802 is installed on the fixed frame 801. The shearing connecting frame 802 is composed of several hinged connecting rods and has the characteristic of being retractable. Several movable frames 803 are respectively installed on each hinge node of the shearing connecting frame 802. The movable frames 803 are slidably connected in the slide groove 401. The movable frame 803 at the outermost end is threadedly connected to the threaded rod 6. When the threaded rod 6 rotates, the movable frame 803 at the outermost end slides along the slide groove 401. Through the linkage of the shearing connecting frame 802, the remaining movable frames 803 are driven to move synchronously and equidistantly along the slide groove 401, thereby realizing the proportional adjustment of the distance between each movable frame 803.

[0037] Refer to the instruction manual appendix Figure 8 Two horizontal sliding frames 14 are fixedly connected to the tilting frame 4. A dual-axis differential 15 is fixedly connected to one of the horizontal sliding frames 14. Two symmetrical threaded rods 16 are fixedly connected to the output end of the dual-axis differential 15. The dual-axis differential 15 is used to drive the two threaded rods 16 to rotate synchronously. A dual-station linear module 17 is threadedly connected to the threaded rod 16. A connecting rod 18 is fixedly connected to the dual-station linear module 17.

[0038] It should be noted that two transverse sliding frames 14 are symmetrically fixed on both sides of the tilting frame 4. The transverse sliding frames 14 provide a sliding mounting base for the dual-station linear module 17, and play a guiding and supporting role in the sliding of the dual-station linear module 17. The dual-shaft differential 15 is fixed between the two transverse sliding frames 14, and it has two symmetrical output ends, which are respectively fixed to two threaded rods 16. It decomposes the input power into two equal-speed, opposite or same-direction output power to drive the two threaded rods 16 to rotate synchronously. The two threaded rods 16 are symmetrically arranged in the transverse sliding frames 14. Two linear modules 17 are symmetrically arranged between two transverse sliding frames 14. Each dual-station linear module 17 is threadedly connected to the corresponding threaded rod 16. When the threaded rod 16 rotates, the dual-station linear module 17 slides back and forth along the extension direction of the transverse sliding frame 14. The dual-station linear module 17 has a linear drive function and can drive its output end to move in a direction perpendicular to the extension direction of the transverse sliding frame 14. A connecting rod 18 is fixedly connected to the dual-station linear module 17. The connecting rod 18 moves synchronously with the dual-station linear module 17 to achieve the positioning of the main beam.

[0039] Refer to the instruction manual appendix Figure 2 and Figure 3The drive assembly includes a servo motor 501 fixedly connected to the tilting frame 4, a synchronous pulley 502 fixedly connected to the output end of the servo motor 501 via a shaft, a synchronous belt 503 sleeved on the outside of the synchronous pulley 502, and two synchronous pulleys 504 respectively sleeved on both ends of the synchronous belt 503. The synchronous pulleys 504 are fixedly connected to the threaded rod 6. The servo motor 501 is used to drive the synchronous pulley 502 to rotate.

[0040] It should be noted that the servo motor 501 is fixed on the tilting frame 4 as a power source, the synchronous pulley 502 is fixed to the output end of the servo motor 501 and rotates with it, the synchronous belt 503 is sleeved on the outside of the synchronous pulley 502 and transmits power synchronously to the two synchronous pulleys 504. The two synchronous pulleys 504 are respectively fixedly connected to one end of the two threaded rods 6 and drive the two threaded rods 6 to rotate synchronously in the same direction, thereby realizing the function of the drive assembly driving the two threaded rods 6 to rotate synchronously.

[0041] Refer to the instruction manual appendix Figure 6 The second drive assembly includes a second servo motor 1001 fixedly connected to the tilting frame 4, a first bevel gear 1002 fixedly connected to the output end of the second servo motor 1001 via a shaft, and two second bevel gears 1003 meshing on both sides of the first bevel gear 1002. The second bevel gears 1003 are fixedly connected to the second threaded rod 11. The second servo motor 1001 is used to drive the first bevel gear 1002 to rotate.

[0042] It should be noted that the servo motor 1001 is fixed on the tilting frame 4 as a power source. Its output end is fixedly connected to the bevel gear 1002 via a shaft. The two bevel gears 1003 are respectively meshed and connected to both sides of the bevel gear 1002. When the bevel gear 1002 rotates, it simultaneously drives the two bevel gears 1003 to rotate synchronously in opposite directions (the bevel gear 1002 and the two bevel gears 1003 are size-matched and stably connected). The two bevel gears 1003 are respectively fixedly connected to the two threaded rods 11 and drive the two threaded rods 11 to rotate synchronously, thereby driving the sliders 12 on both sides to slide synchronously along the slide groove 402, so that the connecting rod 13 drives each positioning reference block 19 to move synchronously.

[0043] Refer to the instruction manual appendix Figure 1 and Figure 11Two positioning reference blocks 19 are installed on the fixed frame 801, the movable frame 803, and the dual-station linear module 17. The positioning reference block 19 has a through hole 1901. The connecting rod 13 and the connecting rod 2 18 are slidably connected to the through hole 1901. Two symmetrical sliding holes 1902 are opened on one side of the positioning reference block 19. An electric push rod 20 is fixedly connected to one side of the positioning reference block 19. A side pressure plate 21 is fixedly connected to the output end of the electric push rod 20. Two symmetrical guide rods 22 are fixedly connected to the side of the side pressure plate 21 near the sliding hole 1902. The guide rods 22 and the sliding hole 1902 are slidably connected. A compression spring 23 is fixedly connected between the guide rods 22 and the positioning reference block 19. The electric push rod 20 is used to drive the side pressure plate 21 to move along the sliding hole 1902.

[0044] It should be noted that two positioning reference blocks 19 are installed on the fixed frame 801, each movable frame 803, and the two dual-station linear modules 17. The positioning reference blocks 19 are used to position and clamp the crossbeam and the main beam. The positioning reference blocks 19 have through holes 1901. Connecting rod 13 and connecting rod 2 18 are slidably connected to the through holes 1901, thereby guiding each positioning reference block 19 in the length and width directions. Two symmetrical sliding holes 1902 are opened on one side of the positioning reference block 19. An electric push rod 20 is fixed on the same side of the positioning reference block 19. The output end of the electric push rod 20 is fixed with a side pressure plate 21. The electric push rod 20 is used to drive the side pressure plate. 21 moves back and forth along the direction of the sliding hole 1902, and the side pressure plate 21 presses and fixes the crossbeam or main beam from the side. Two symmetrical guide rods 22 are fixedly connected to the side of the side pressure plate 21 near the sliding hole 1902. The guide rods 22 are slidably connected to the sliding hole 1902. The guide rods 22 play a guiding and supporting role during the movement of the side pressure plate 21, ensuring the smoothness of the movement of the side pressure plate 21. At the same time, the compression spring 23 is sleeved on the outside of the guide rods 22. When the electric push rod 20 drives the side pressure plate 21 to extend, the compression spring 23 is stretched and accumulates elastic force. When the electric push rod 20 is de-energized or retracted, the compression spring 23 drives the side pressure plate 21 to return to its original position by its own elastic force.

[0045] Refer to the instruction manual appendix Figure 9 A servo motor 27 is fixedly connected to the positioning reference block 19. An electric push rod 28 is fixedly connected to the output end of the servo motor 27. The servo motor 27 is used to drive the electric push rod 28 to rotate. A top pressure plate 29 is fixedly connected to the output end of the electric push rod 28. The electric push rod 28 is used to drive the top pressure plate 29 to move in the vertical direction. Heat insulation pads 24 are fixedly connected to the contact surfaces of the positioning reference block 19 and the side pressure plate 21. A heat sink 25 is fixedly connected to the side of the positioning reference block 19 away from the side pressure plate 21. Several heat sink fins 26 are provided on the heat sink 25.

[0046] It should be noted that a servo motor 27 is fixed on the positioning reference block 19. The servo motor 27 is used to drive the electric push rod 28 to rotate around its own axis, thereby driving the top pressure plate 29 to rotate in the horizontal plane to avoid the workpiece or adjust the clamping angle. The output end of the electric push rod 28 is fixedly connected to the top pressure plate 29. The electric push rod 28 extends and retracts in the vertical direction to drive the top pressure plate 29 to move in the vertical direction. The top pressure plate 29 clamps and fixes the crossbeam or main beam from above, and cooperates with the side pressure plate 21 to form a multi-directional clamping.

[0047] It is worth noting that heat insulation pads 24 are fixedly connected to the surfaces of the positioning reference block 19 and the workpiece, as well as the surfaces of the side pressure plate 21 and the workpiece. The heat insulation pads 24 are used to block the high-temperature heat conduction generated during the welding process, preventing high temperature from causing thermal damage to the positioning reference block 19 and the side pressure plate 21, and protecting the surface of the positioned workpiece. A heat sink 25 is fixedly connected inside the side of the positioning reference block 19 away from the side pressure plate 21. The heat sink 25 is made of a material with good thermal conductivity and is used to quickly conduct the heat absorbed by the positioning reference block 19. Several heat sink fins 26 are provided on the heat sink 25. The heat sink fins 26 are evenly distributed along the surface of the heat sink 25 to increase the heat dissipation area and improve the heat dissipation efficiency. Combined with the airflow blown out by the jet hole 403, the positioning reference block 19 can be cooled quickly.

[0048] Refer to the instruction manual appendix Figure 10 An electric push rod 30 is fixedly connected inside the positioning reference block 19. A pressure column 31 is fixedly connected to the output end of the electric push rod 30. An arc groove 3101 is provided on the pressure column 31. The electric push rod 30 is used to drive the pressure column 31 to move, so that the arc groove 3101 cooperates with the through hole 1901 to lock the connecting rod 13 or connecting rod 18 that is slidably connected in the through hole 1901.

[0049] It should be noted that an electric push rod 30 is fixed inside the positioning reference block 19. The electric push rod 30 is arranged in a direction perpendicular to the axis of the through hole 1901. A pressure column 31 is fixed at the output end of the electric push rod 30. The pressure column 31 is located on one side of the through hole 1901. When the electric push rod 30 extends or retracts, it drives the pressure column 31 to move closer to or away from the through hole 1901. An arc-shaped groove 3101 is opened at the end of the pressure column 31 facing the through hole 1901. The curvature of the arc-shaped groove 3101 is adapted to the outer diameter curvature of the connecting rod 13 and the connecting rod 2 18. When the electric push rod 30 drives the pressure column 31 towards the through hole 1901, the pressure column 31 moves towards the through hole 1901. When extended in direction 1, the arc-shaped groove 3101 fits against the outer wall of the connecting rod 13 or connecting rod 18 in the through hole 1901. The friction between the arc-shaped groove 3101 and the connecting rod achieves locking, preventing the connecting rod 13 or connecting rod 18 from axially moving in the through hole 1901. This ensures that each positioning reference block 19 remains in a stable position during welding. When the electric push rod 30 drives the pressure column 31 to move in the opposite direction, the arc-shaped groove 3101 disengages from the connecting rod 13 or connecting rod 18, releasing the locking state and allowing the connecting rod 13 or connecting rod 18 to resume free sliding in the through hole 1901.

[0050] Refer to the instruction manual appendix Figure 7 A center-of-gravity balance frame 32 is fixedly connected to the bottom of the tilting frame 4. A center-of-gravity detector 33 is fixedly connected to each of the four corners of the center-of-gravity balance frame 32. The center-of-gravity detector 33 is used to detect changes in the center of gravity of the tilting frame 4 in real time. Several center-of-gravity balancing components are installed inside the center-of-gravity balance frame 32. The center-of-gravity balancing components include a first winding motor 3401 fixedly connected to one end of the center-of-gravity balance frame 32, a second winding motor 3402 fixedly connected to the other end of the center-of-gravity balance frame 32, a steel cable 3403 installed between the first winding motor 3401 and the second winding motor 3402, and a counterweight 3404 fixedly connected to the steel cable 3403. The counterweight 3404 is slidably connected inside the center-of-gravity balance frame 32. The first winding motor 3401 and the second winding motor 3402 drive the counterweight 3404 to move through the steel cable 3403 to adjust the center of gravity.

[0051] It should be noted that the center-of-gravity balancing frame 32 has a rectangular frame structure and rotates synchronously with the tilting frame 4. A center-of-gravity detector 33 is fixed at each of the four corners of the center-of-gravity balancing frame 32. These detectors are vibration sensors, and they respectively detect the vibration amplitude and frequency at the four corners of the tilting frame 4 during the tilting process. The external controller determines the direction and amount of the center-of-gravity shift of the tilting frame 4 by comparing the differences between the detection values ​​of the four vibration sensors. When the center of gravity of the tilting frame 4 is at the center position, the detection values ​​of the four vibration sensors are basically consistent. When the tilting frame 4 tilts, causing a shift in the center of gravity, the vibration amplitude at the corner to one side increases, while the vibration amplitude at the opposite corner decreases. The external controller... The real-time center of gravity offset direction and offset amount are calculated based on the difference changes of the vibration sensors. Then, the external controller controls the winding motor 3401 and winding motor 3402 to perform winding and unwinding actions respectively, according to the calculated values. The counterweight 3404 is pulled along the center of gravity balance frame 32 to the corresponding position by the steel cable 3403. The position of the counterweight 3404 is changed to adjust the overall center of gravity of the tilting frame 4. When the detection values ​​of the four vibration sensors return to the same, it means that the center of gravity has returned to the center position, and the counterweight 3404 stops moving, so that the tilting frame 4 always maintains the center of gravity balance during the tilting process, preventing instability or vibration caused by the center of gravity offset, and improving welding accuracy and safety.

[0052] Refer to the instruction manual appendix Figure 4 and Figure 5 The movable frame 803 is provided with two symmetrical limiting grooves 8031. Two symmetrical locking components are installed in the slide groove 401. The locking components include an electric push rod 901 fixedly connected in the slide groove 401, a wedge-shaped locking block 902 fixedly connected to the output end of the electric push rod 901, several guide rods 903 fixedly connected to the side of the wedge-shaped locking block 902 away from the electric push rod 901, and several sliding sleeves 904 fixedly connected to the slide groove 401. The sliding sleeves 904 and the guide rods 903 are slidably connected. The electric push rod 901 is used to drive the wedge-shaped locking block 902 to move, so that the wedge-shaped locking block 902 is inserted into or disengaged from the limiting groove 8031.

[0053] It should be noted that the movable frame 803 is provided with two symmetrical limiting grooves 8031. The two limiting grooves 8031 ​​are respectively opened on both sides of the movable frame 803 and correspond to the positions of the locking components. At the same time, the electric push rod 901 extends and retracts in a direction perpendicular to the side wall of the slide groove 401 to push the wedge-shaped locking block 902 to move and provide locking power. The end of the wedge-shaped locking block 902 near the electric push rod 901 has a wedge-shaped inclined surface structure. The shape and size of the wedge-shaped locking block 902 are adapted to the limiting groove 8031. When the electric push rod 901 extends, it drives the wedge-shaped locking block 902 to move towards the movable frame 803. The wedge-shaped inclined surface of the wedge-shaped locking block 902 inserts into the limiting groove 8031 ​​and gradually weds. The mechanism locks the movable frame 803 in its current position within the slide groove 401, preventing it from shifting. When the electric push rod 901 retracts, it drives the wedge-shaped locking block 902 to disengage from the limiting groove 8031, releasing the lock on the movable frame 803 and allowing it to slide freely along the slide groove 401. Simultaneously, multiple guide rods 903 are slidably inserted into the sliding sleeve 904. The sliding cooperation between the guide rods 903 and the sliding sleeve 904 guides and supports the movement of the wedge-shaped locking block 902, ensuring its smooth movement along a preset direction and guaranteeing accurate insertion or disengagement of the wedge-shaped locking block 902 into or out of the limiting groove 8031, thus improving the reliability and repeatability of the lock.

[0054] Refer to the instruction manual appendix Figures 1 to 11 In this embodiment, when using the welding process of the main beam of an electric tricycle according to this technical solution, an electric tricycle main beam welding device as described above is adopted, including the following steps: S1: Start drive assembly one. Servo motor one 501 drives synchronous wheel one 502 to rotate. Then, through synchronous belt 503, it drives two synchronous wheels two 504 to rotate, thereby realizing the synchronous rotation of two threaded rods one 6. Threaded rod one 6 drives the outermost moving frame 803 to slide along slide groove one 401. The outermost moving frame 803 drives the other moving frames 803 to move synchronously and equidistantly through shear-type connecting frame 802, realizing the width adjustment between each positioning reference block 19. At the same time, start drive assembly two. Servo motor two 1001 drives two threaded rods two 11 to rotate synchronously through bevel gear one 1002 and bevel gear two 1003. Threaded rod two 11 drives connecting rod one 13 to move through slider 12. Connecting rod one 13 drives each positioning reference block 19 to slide along through hole 1901, realizing the length adjustment between each positioning reference block 19, so that each positioning reference block 19 moves to the designated position for installing each crossbeam. S2: Start the dual-axis differential 15. The dual-axis differential 15 drives the two threaded rods 16 to rotate synchronously. The threaded rods 16 drive the dual-station linear module 17 to move along the transverse sliding frame 14 to the designated position. The dual-station linear module 17 drives the positioning reference block 19 installed at its output end to move to the designated position for installing the two main beams. S3: After each positioning reference block 19 moves into place, the electric push rod 1 901 first drives the wedge-shaped locking block 902 to move, so that the wedge-shaped locking block 902 is embedded in the limiting groove 8031 ​​to lock the moving frame 803. Then the electric push rod 4 30 pushes the pressure column 31 to move, so that the arc groove 3101 cooperates with the through hole 1901 to lock the connecting rod 1 13 and connecting rod 2 18 that are slidably connected in the through hole 1901. S4: Place each crossbeam and the two main beams on the corresponding positioning reference block 19, then drive the side pressure plate 21 to extend along the sliding hole 1902, and at the same time drive the electric push rod 28 to rotate. The electric push rod 28 drives the top pressure plate 29 to move in the vertical direction, so that the side pressure plate 21 and the top pressure plate 29 press and fix the crossbeam and the main beam respectively. S5: Welding operation is carried out. At the same time, the gas supply pipe 35 is connected to an external gas source and protective gas is sprayed into the welding area through each jet hole 403 to form a protective gas curtain. At the same time, the airflow blows towards the heat dissipation fins 26 to dissipate heat from the positioning reference block 19. S6: For areas where the welding position cannot be directly reached, activate the single-axis differential 3. The single-axis differential 3 drives the tilting frame 4 to rotate around the column 2, tilting the area to be welded to an exposed position for welding operations. During the tilting process, the center of gravity detectors 33 at the four corners of the center of gravity balance frame 32 detect changes in the center of gravity of the tilting frame 4 in real time and transmit the detection signals to the external controller. The external controller controls each winding motor 1 3401 and winding motor 2 3402 to drive the counterweight 3404 to move within the center of gravity balance frame 32 via the steel cable 3403, adjusting the center of gravity balance of the tilting frame 4. It should be noted that in this embodiment, the order of steps S1 and S2 can be flexibly adjusted according to the actual working conditions. The purpose is to move each positioning reference block 19 to a designated position to adapt to main beams and crossbeams of different sizes and specifications. In step S1, drive component one and drive component two operate synchronously to realize the adjustment in the width direction and length direction respectively. The two do not interfere with each other to ensure the accuracy of crossbeam positioning. In step S3, the locking action of electric push rod one 901 is performed before the locking action of electric push rod four 30. The purpose is to first fix the moving frame 803 in the slide groove one 401, and then lock the connecting rod one 13 and connecting rod two 18 to prevent the moving frame 803 from moving during the subsequent locking process and affecting the positioning accuracy. In step S4, the side pressure plate 21 presses the workpiece from the side, and the top pressure plate 29 presses the workpiece from above. The workpiece is clamped, and the two work together to achieve multi-directional clamping, ensuring the stability of the workpiece during welding. In step S5, the protective gas sprayed from the jet hole 403 forms a protective gas curtain in the welding area to prevent weld oxidation. On the other hand, the airflow blows onto the heat dissipation fins 26 to simultaneously cool the positioning reference block 19, preventing the positioning reference block 19 from being thermally deformed due to the high temperature of welding, which would affect the positioning accuracy. In step S6, the center of gravity detectors 33 at the four corners of the center of gravity balance frame 32 determine the direction and amount of center of gravity offset by detecting the force or posture changes at each corner. The external controller adjusts the position of each counterweight block 3404 in real time according to the detection signal, so that the tilting frame 4 can maintain the center of gravity balance at any tilting angle, avoiding the tilting frame 4 shaking due to uneven load or uneven load on the output bearing of the single-axis differential 3, which would affect the welding quality.

[0055] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A welding device for the main beam of an electric tricycle, characterized in that: Includes a frame (1), on which two symmetrical columns (2) are fixedly connected, and a tilting frame (4) is rotatably connected between the columns (2). A single-shaft differential (3) is fixedly connected to one of the columns (2), and the output end of the single-shaft differential (3) is fixedly connected to one end of the tilting frame (4). The single-shaft differential (3) is used to drive the tilting frame (4) to rotate. The tilting frame (4) has two symmetrical slide grooves (401), two symmetrical slide grooves (402), and several jet holes (403). An air supply pipe (35) is fixedly connected to the tilting frame (4), and the air supply pipe (35) is used to connect the various jet holes (403). One end of the flipping frame (4) is equipped with a drive assembly, and the output end of the drive assembly is connected to two symmetrical threaded rods (6). The drive assembly is used to drive the two threaded rods (6) to rotate synchronously. A side sliding frame (7) is provided on the outside of the threaded rods (6). The side sliding frame (7) and the flipping frame (4) are fixedly connected. A synchronization module is connected to the threaded rods (6). The other end of the flipping frame (4) is equipped with a drive assembly two. The output end of the drive assembly two is connected to two symmetrical threaded rods two (11). The drive assembly two is used to drive the two threaded rods two (11) to rotate synchronously. A slider (12) is threadedly connected to the threaded rods two (11). A connecting rod one (13) is fixedly connected to the slider (12). The slider (12) is slidably connected in the slide groove two (402). The synchronization module includes a fixed frame (801) fixedly connected to the center of the flipping frame (4), a shearing connecting frame (802) installed on the fixed frame (801), and several movable frames (803) installed on the shearing connecting frame (802). The movable frames (803) are slidably connected to the slide groove (401), and the movable frame (803) at the far end is threadedly connected to the threaded rod (6).

2. The electric tricycle main beam welding device according to claim 1, characterized in that: Two horizontal sliding frames (14) are fixedly connected to the tilting frame (4). A dual-axis differential (15) is fixedly connected to one of the horizontal sliding frames (14). Two symmetrical threaded rods (16) are fixedly connected to the output end of the dual-axis differential (15). The dual-axis differential (15) is used to drive the two threaded rods (16) to rotate synchronously. A dual-station linear module (17) is threadedly connected to the threaded rod (16). A connecting rod (18) is fixedly connected to the dual-station linear module (17).

3. The electric tricycle main beam welding device according to claim 2, characterized in that: The drive assembly includes a servo motor (501) fixedly connected to the tilting frame (4), a synchronous pulley (502) fixedly connected to the output end of the servo motor (501) via a shaft, a synchronous belt (503) sleeved on the outside of the synchronous pulley (502), and two synchronous pulleys (504) respectively sleeved on both ends of the synchronous belt (503). The synchronous pulleys (504) are fixedly connected to the threaded rod (6). The servo motor (501) is used to drive the synchronous pulley (502) to rotate.

4. The electric tricycle main beam welding device according to claim 3, characterized in that: The second drive assembly includes a second servo motor (1001) fixedly connected to the tilting frame (4), a first bevel gear (1002) fixedly connected to the output end of the second servo motor (1001) via a shaft, and two second bevel gears (1003) meshing on both sides of the first bevel gear (1002). The second bevel gear (1003) and the second threaded rod (11) are fixedly connected. The second servo motor (1001) is used to drive the first bevel gear (1002) to rotate.

5. The electric tricycle main beam welding device according to claim 4, characterized in that: Two positioning reference blocks (19) are installed on the fixed frame (801), the movable frame (803) and the dual-station linear module (17). The positioning reference block (19) has a through hole (1901). The connecting rod one (13) and the connecting rod two (18) are slidably connected to the through hole (1901). Two symmetrical sliding holes (1902) are opened on one side of the positioning reference block (19). An electric push rod two (20) is fixedly connected to one side of the positioning reference block (19). A side pressure plate (21) is fixedly connected to the output end of the electric push rod two (20). Two symmetrical guide rod two (22) are fixedly connected to the side of the side pressure plate (21) near the sliding hole (1902). The guide rod two (22) and the sliding hole (1902) are slidably connected. A compression spring (23) is fixedly connected between the guide rod two (22) and the positioning reference block (19). The electric push rod two (20) is used to drive the side pressure plate (21) to move along the sliding hole (1902).

6. The electric tricycle main beam welding device according to claim 5, characterized in that: A servo motor (27) is fixedly connected to the positioning reference block (19). An electric push rod (28) is fixedly connected to the output end of the servo motor (27). The servo motor (27) is used to drive the electric push rod (28) to rotate. A top pressure plate (29) is fixedly connected to the output end of the electric push rod (28). The electric push rod (28) is used to drive the top pressure plate (29) to move in the vertical direction. A heat insulation pad (24) is fixedly connected to the contact surface of the positioning reference block (19) and the contact surface of the side pressure plate (21). A heat sink (25) is fixedly connected to the side of the positioning reference block (19) away from the side pressure plate (21). Several heat sink fins (26) are provided on the heat sink (25).

7. The electric tricycle main beam welding device according to claim 6, characterized in that: An electric push rod four (30) is fixedly connected inside the positioning reference block (19). A pressure column (31) is fixedly connected to the output end of the electric push rod four (30). An arc groove (3101) is provided on the pressure column (31). The electric push rod four (30) is used to drive the pressure column (31) to move, so that the arc groove (3101) cooperates with the through hole (1901) to lock the connecting rod one (13) or connecting rod two (18) that is slidably connected in the through hole (1901).

8. The electric tricycle main beam welding device according to claim 7, characterized in that: A center-of-gravity balancing frame (32) is fixedly connected to the bottom of the tilting frame (4). A center-of-gravity detector (33) is fixedly connected to each of the four corners of the center-of-gravity balancing frame (32). The center-of-gravity detector (33) is used to detect the change in the center of gravity of the tilting frame (4) in real time. Several center-of-gravity balancing components are installed inside the center-of-gravity balancing frame (32). The center-of-gravity balancing components include a winding motor (3401) fixedly connected to one end of the center-of-gravity balancing frame (32), and another component fixedly connected to the center-of-gravity balancing frame (32). One end has a second winding motor (3402), a steel cable (3403) installed between the first winding motor (3401) and the second winding motor (3402), and a counterweight (3404) fixedly connected to the steel cable (3403). The counterweight (3404) is slidably connected in the center of gravity balance frame (32). The first winding motor (3401) and the second winding motor (3402) drive the counterweight (3404) to move through the steel cable (3403) to adjust the center of gravity.

9. The electric tricycle main beam welding device according to claim 8, characterized in that: The movable frame (803) is provided with two symmetrical limiting grooves (8031). Two symmetrical locking components are installed in the slide groove (401). The locking components include an electric push rod (901) fixedly connected in the slide groove (401), a wedge-shaped locking block (902) fixedly connected to the output end of the electric push rod (901), several guide rods (903) fixedly connected to the side of the wedge-shaped locking block (902) away from the electric push rod (901), and several sliding sleeves (904) fixedly connected to the slide groove (401). The sliding sleeves (904) and the guide rods (903) are slidably connected. The electric push rod (901) is used to drive the wedge-shaped locking block (902) to move, so that the wedge-shaped locking block (902) is embedded or disengaged from the limiting groove (8031).

10. A welding process for the main beam of an electric tricycle, characterized in that: The steps of using the electric tricycle main beam welding device according to claim 9 include: S1: Start drive component one, servo motor one (501) drives synchronous pulley one (502) to rotate, and then drives two synchronous pulleys two (504) to rotate through synchronous belt (503), thereby realizing the synchronous rotation of two threaded rods one (6). Threaded rod one (6) drives the outermost moving frame (803) to slide along slide groove one (401). The outermost moving frame (803) drives the other moving frames (803) to move synchronously and equidistantly through shear-type connecting frame (802), realizing the movement between each positioning reference block (19). The width is adjusted, and the drive component two is started at the same time. The servo motor two (1001) drives the two threaded rods two (11) to rotate synchronously through the bevel gear one (1002) and bevel gear two (1003). The threaded rod two (11) drives the connecting rod one (13) to move through the slider (12). The connecting rod one (13) drives each positioning reference block (19) to slide along the through hole (1901) to realize the length adjustment between each positioning reference block (19) so that each positioning reference block (19) can be moved to the designated position for installing each crossbeam. S2: Start the dual-shaft differential (15), the dual-shaft differential (15) drives the two threaded rods (16) to rotate synchronously, the threaded rods (16) drive the dual-station linear module (17) to move along the transverse sliding frame (14) to the designated position, the dual-station linear module (17) drives the positioning reference block (19) installed at its output end to move to the designated position for installing the two main beams; S3: After each positioning reference block (19) moves into place, the electric push rod one (901) first drives the wedge locking block (902) to move, so that the wedge locking block (902) is embedded in the limiting groove (8031) to lock the moving frame (803). Then the electric push rod four (30) pushes the pressure column (31) to move, so that the arc groove (3101) cooperates with the through hole (1901) to lock the connecting rod one (13) and connecting rod two (18) that are slidably connected in the through hole (1901). S4: Place each crossbeam and the two main beams on the corresponding positioning reference block (19), then drive the side pressure plate (21) to extend along the sliding hole (1902) with the electric push rod two (20), and at the same time drive the electric push rod three (28) to rotate. The electric push rod three (28) drives the top pressure plate (29) to move in the vertical direction, so that the side pressure plate (21) and the top pressure plate (29) press and fix the crossbeam and the main beam respectively. S5: Welding operation is carried out. At the same time, the gas supply pipe (35) is connected to an external gas source and a protective gas is sprayed into the welding area through each jet hole (403) to form a protective gas curtain. At the same time, the airflow blows towards the heat dissipation fins (26) to dissipate heat on the positioning reference block (19). S6: For areas that cannot be directly reached by the welding position, start the single-axis differential (3). The single-axis differential (3) drives the tilting frame (4) to rotate around the column (2) to tilt the area to be welded to the exposed position for welding operation. During the tilting process, the center of gravity detectors (33) at the four corners of the center of gravity balance frame (32) detect the change of the center of gravity of the tilting frame (4) in real time and transmit the detection signal to the external controller. The external controller controls each winding motor one (3401) and winding motor two (3402) to drive the counterweight (3404) to move within the center of gravity balance frame (32) through the steel cable (3403) to adjust the center of gravity balance of the tilting frame (4).

Images