A tricycle carriage robot welding tool

Abstract

This invention discloses a robotic welding fixture for a three-wheeled vehicle body, relating to the field of welding equipment technology. It includes a welding table; a support beam conveyor belt assembly mounted on the welding table; a frame conveyor platform and a frame unloading platform respectively positioned on opposite sides of the welding table; a robotic arm laser welding machine mounted on top of the welding table, with its position vertically corresponding to the position of the frame conveyor platform; the support beam conveyor belt assembly includes an operating platform and a conveyor belt arranged sequentially from top to bottom at intervals, with multiple through slots and multiple support beam placement frames arranged along the conveying direction on the conveyor belt, the through slots and support beam placement frames being staggered; and multiple lifting cylinders positioned below the conveyor belt; the frame conveyor platform includes a support platform located outside the welding table, with a lifting cylinder mounted on the bottom surface of the support platform, and a lifting plate mounted on the piston rod of the lifting cylinder. This invention has advantages such as reducing labor intensity and improving welding position accuracy.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to a welding fixture for a three-wheeled vehicle carriage robot. Background Technology

[0002] The carriage of an electric tricycle is assembled by welding a floor plate and a frame together. The welding of the floor plate requires welding a rectangular frame and multiple support beams together. Currently, most welding operations require manual placement of the support beams within the rectangular frame, one by one, which can easily lead to significant deviations in the placement of the support beams. This also results in high labor intensity for workers, complex operations, and ultimately affects the quality of the weld. Summary of the Invention

[0003] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a robotic welding fixture for a three-wheeled vehicle carriage, which has advantages such as reducing labor intensity and improving welding position accuracy.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a robotic welding fixture for a three-wheeled vehicle body, comprising:

[0005] Welding station;

[0006] Support beam conveyor belt assembly, the support beam conveyor belt assembly is set on the welding table;

[0007] Chassis conveyor;

[0008] The frame unloading platform, frame conveyor platform, and frame unloading platform are respectively set on opposite sides of the welding platform;

[0009] The robotic arm laser welding machine is located on top of the welding table, and its position corresponds vertically to that of the vehicle frame conveyor.

[0010] The support beam conveyor belt assembly includes an operating platform and a conveyor belt arranged at intervals from top to bottom. Multiple through slots and multiple support beam placement frames are arranged on the conveyor belt along the conveying direction, and the through slots and support beam placement frames are arranged alternately. Multiple lifting cylinders are arranged below the conveyor belt.

[0011] The frame conveyor includes a support platform set outside the welding table. A lifting cylinder is installed on the bottom surface of the support platform, and a lifting plate is installed on the piston rod of the lifting cylinder.

[0012] Preferably, the conveyor belt comprises:

[0013] Active roller;

[0014] Driven rollers, driving rollers, and driven rollers are arranged side by side at intervals below the operating table;

[0015] The conveyor belt has a closed-loop structure and is fitted around the drive roller and driven roller. The through groove and support beam placement frame are staggered along the conveying direction of the conveyor belt. The conveyor belt can rotate under the action of the drive roller and driven roller, thereby realizing the conveying of the support beam, thus completing the welding operation of the tricycle carriage floor.

[0016] Preferably, the support beam placement frame includes:

[0017] Placement rack base plate, which is embedded in the conveyor belt;

[0018] The placement slot is located inside the base plate of the placement rack.

[0019] There are two placement blocks, which are respectively placed at opposite ends of the placement groove. This allows for the placement of support beams of appropriate length according to the different sizes of tricycle carriage floor plates, so that the support beams can be transported and thus facilitated for welding.

[0020] Preferably, the placement block group includes:

[0021] Fixed block;

[0022] The movable block, the fixed block, and the movable block are arranged side by side in the placement slot, with the two movable blocks located between the two fixed blocks;

[0023] The connecting rod has two ends along its length that are movably connected to two movable blocks respectively;

[0024] Card slot 1, there are multiple card slots 1, and each fixed block has one card slot 1 on its top surface;

[0025] There are multiple slots, and each movable block has one slot on its top surface. The length direction of slot 1 is the same as that of slot 2. The width of slot 2 is greater than that of slot 1. Depending on the size of the tricycle carriage floor, a support beam of appropriate length can be placed in slot 1 on the fixed block or slot 2 on the movable block so that the support beam can be transported to the appropriate position to complete the welding operation.

[0026] Preferably, the movable block has side sliders on its two opposing side walls, and the inner wall of the placement groove has vertically arranged slider grooves corresponding to the side sliders. The side sliders are slidably disposed in the corresponding slider grooves. The bottom surface of the movable block has a lower slider that matches the slot. The movable block can lift the support beam to the position of the tricycle carriage floor plate placed on the operating platform so that the support beam can be welded to the tricycle carriage floor plate.

[0027] Preferably, both ends of the connecting rod in the length direction are movably inserted into the two movable blocks, and both ends of the connecting rod in the length direction are horizontally provided with return springs. The return springs are connected to the movable blocks at the ends away from the connecting rods, so that when the movable blocks are lifted, the movable blocks can slide to the top surface of the corresponding fixed blocks under the action of the return springs.

[0028] Preferably, the side wall of the placement rack base plate near the end of the vehicle frame conveyor table and the side wall near the end of the vehicle frame unloading table are provided with positioning guide grooves. Multiple guide rods adapted to the positioning guide grooves are horizontally arranged on the welding table. The guide rods are slidably arranged in the positioning guide grooves at the corresponding positions. When the conveyor belt moves the placement rack base plate, the guide rods can slide in the positioning guide grooves at the corresponding positions, thereby positioning the placement rack base plate and improving the accuracy of the welding position of the support beam on the tricycle carriage floor.

[0029] Preferably, multiple pneumatic clamping cylinders are evenly distributed circumferentially on the top surface of the operating platform. Notch slots are provided on the top surface of the operating platform near the end of the vehicle frame conveying platform and near the end of the vehicle frame unloading platform. The bottom surface of the notch slots is on the same horizontal plane as the top surface of the vehicle frame unloading platform, which facilitates the clamping and positioning of the tricycle carriage floor plate placed on the operating platform by the pneumatic clamping cylinders, and helps to ensure the accuracy of the welding position of the support beam.

[0030] Preferably, a horizontal crossbar is provided on the piston rod of the lifting cylinder, the length direction of the crossbar is parallel to the length direction of the connecting rod, and a support is provided on the crossbar. The position of the support is adapted to the position of the connecting rod. Activating the lifting cylinder can lift the connecting rod and the movable block from the placement groove, thereby lifting the support beam to a position adapted to the floor of the tricycle box for welding operations.

[0031] Preferably, the lifting cylinders are spaced apart along the conveying direction of the conveyor belt, and the distance between two adjacent lifting cylinders is adapted to the distance between two adjacent through slots, so as to facilitate the lifting of the support beam to a position adapted to the floor of the tricycle box for welding operations as needed.

[0032] The beneficial effects of the present invention are as follows: 1. The set support beam conveyor belt assembly can place the support beam on the support beam placement frame, and under the action of the conveyor belt, it can be automatically transported to the position corresponding to the tricycle carriage floor on the operating table, avoiding the drawbacks of manual hand operation and improving work efficiency and welding position accuracy.

[0033] 2. Depending on the width of the support beam, the movable block can be adjusted to different positions relative to the fixed block, facilitating the placement of support beams of different widths and increasing the versatility of welding operations. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a welding fixture for a three-wheeled vehicle carriage robot provided in an embodiment of the present invention.

[0036] Figure 2 This is a schematic diagram of a support beam placement frame structure for a welding fixture for a three-wheeled vehicle cargo box robot, provided in an embodiment of the present invention.

[0037] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0038] Figure 4 This is a schematic diagram of the support beam conveyor belt assembly structure of a welding fixture for a three-wheeled vehicle carriage robot, provided in an embodiment of the present invention.

[0039] Figure 5 This is a schematic diagram of the support structure of a welding fixture for a three-wheeled vehicle carriage robot, provided as an embodiment of the present invention.

[0040] Figure 6 This is a schematic diagram of the lower slider position of a welding fixture for a three-wheeled vehicle carriage robot, provided as an embodiment of the present invention.

[0041] Figure 7 This is a schematic diagram of the slider groove position of a welding fixture for a three-wheeled vehicle carriage robot provided in an embodiment of the present invention.

[0042] Figure 8 This is a schematic diagram of the linkage structure of a welding fixture for a three-wheeled vehicle carriage robot, provided as an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached drawings: 1. Welding table; 2. Support beam conveyor belt assembly; 21. Conveyor belt; 211. Driven roller; 212. Driven roller; 213. Conveyor belt; 22. Through groove; 23. Support beam placement frame; 231. Placement frame base plate; 232. Placement groove; 233. Placement block assembly; 2331. Fixed block; 2332. Movable block; 2333. Connecting rod; 2334. Slot 1; 2335. Slot 2; 2 336. Side slider; 2337. Slider groove; 2338. Lower slider; 2339. Return spring; 24. Lifting cylinder; 241. Crossbar; 242. Support; 25. Operating table; 251. Pneumatic clamping cylinder; 252. Notch groove; 3. Chassis conveyor; 31. Support platform; 32. Lifting cylinder; 33. Lifting plate; 4. Chassis unloading platform; 5. Robotic arm laser welding machine; 6. Positioning guide groove. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1

[0046] like Figures 1 to 2 , Figures 4 to 5 As shown, the present invention provides a robotic welding fixture for a three-wheeled vehicle body, including a welding table 1; a support beam conveyor belt assembly 2 is disposed on the welding table 1; a frame conveyor 3 and a frame unloading platform 4 are respectively disposed on opposite sides of the welding table 1; a robotic arm laser welding machine 5 is disposed on the top of the welding table 1, and the position of the robotic arm laser welding machine 5 corresponds vertically to the position of the frame conveyor 3; the support beam conveyor belt assembly 2 includes an operating platform 25 and a conveyor belt 21 arranged sequentially from top to bottom, with multiple through slots 22 and multiple support beam placement frames 23 arranged along the conveying direction on the conveyor belt 21, and the through slots 22 and support beam placement frames 23 are arranged alternately; multiple lifting cylinders 24 are disposed below the conveyor belt 21; the frame conveyor 3 includes a support platform 31 disposed outside the welding table 1, a lifting cylinder 32 is disposed on the bottom surface of the support platform 31, and a lifting plate 33 is disposed on the piston rod of the lifting cylinder 32.

[0047] Before welding, the tricycle cargo box floor (which is a rectangular frame structure) is pushed from the lifting plate 33 to the operating platform 25 (the lifting cylinder 32 can drive the lifting plate 33 to lift, making it easier for the operator to place the tricycle cargo box floor on the lifting plate 33); at the same time, the support beams are placed on the support beam placement frame 23 in the frame conveyor 3. Each support beam can be transported sequentially to the position corresponding to the tricycle cargo box floor by the action of the conveyor belt 21. The lifting cylinder 24 can lift the support beams at the corresponding positions into the tricycle cargo box floor (because the conveyor belt 21 is provided with multiple through grooves 22 along the conveying direction, and the through grooves 22 and the support beam placement frame 23 are staggered sequentially). Therefore, when the support beam is located in the support beam placement frame 23 at the upper position of the conveyor belt 21, the piston rod of the lifting cylinder 24 can pass through the through groove 22 at the lower position of the conveyor belt 21, thereby lifting the support beam at the corresponding position into the tricycle box floor. Then, the support beam can be welded into the tricycle box floor by the robotic arm laser welding machine 5 (the robotic arm laser welding machine 5 is existing technology, so it will not be described in detail here). After the welding of the tricycle box floor is completed, the tricycle box floor can be moved from the operating table 25 to the frame unloading table 4, and the box frame welding operation can be carried out. This reduces the frequent movement of the tricycle box during welding and improves the welding efficiency.

[0048] Multiple ball bearings are embedded in a matrix on the top surface of the lifting plate 33, which facilitates the tricycle carriage floor to be pushed from the lifting plate 33 onto the operating platform 25.

[0049] Example 2

[0050] Based on Example 1, such as Figures 1 to 8As shown, the conveyor belt 21 includes a drive roller 211; the drive roller 211 and driven roller 212 are arranged side-by-side and spaced apart below the operating table 25; the conveyor belt 213 has a closed-loop structure, and is sleeved on the outside of the drive roller 211 and driven roller 212; the through groove 22 and the support beam placement frame 23 are staggered along the conveying direction of the conveyor belt 213; the support beam placement frame 23 includes a placement frame base plate 231, which is embedded in the conveyor belt 213; the placement groove 232 is disposed in the placement frame base plate 231; two placement block groups 233 are provided, and... Two placement block groups 233 are respectively disposed at opposite ends of the placement slot 232; each placement block group 233 includes a fixed block 2331; the fixed block 2331 and the movable block 2332 are arranged side by side in the placement slot 232, with the two movable blocks 2332 located between the two fixed blocks 2331; the two ends of the connecting rod 2333 along its length are respectively movably connected to the two movable blocks 2332; multiple slots 2334 are provided, and each fixed block 2331 has one slot 2334 on its top surface; multiple slots 2335 are provided, and each Each movable block 2332 has a second slot 2335 on its top surface. The length direction of the first slot 2334 is the same as that of the second slot 2335, and the width of the second slot 2335 is greater than that of the first slot 2334. Each of the two opposing side walls of the movable block 2332 has a side slider 2336. The inner wall of the placement groove 232 has vertically arranged slider grooves 2337 corresponding to the side sliders 2336. The side sliders 2336 slide within their corresponding slider grooves 2337. The bottom surface of the movable block 2332 has a groove corresponding to the first slot 2335. The 34-phase matching lower slider 2338; the two ends of the connecting rod 2333 in the length direction respectively move through into the two movable blocks 2332, and the two ends of the connecting rod 2333 in the length direction are horizontally provided with return springs 2339, and the end of the return spring 2339 away from the connecting rod 2333 is connected to the movable block 2332; a horizontal crossbar 241 is horizontally provided on the piston rod of the lifting cylinder 24, the length direction of the crossbar 241 is parallel to the length direction of the connecting rod 2333, and a support 242 is provided on the crossbar 241, the position of the support 242 is adapted to the position of the connecting rod 2333.

[0051] The combined action of the driving roller 211 and the driven roller 212 drives the conveyor belt 213 to rotate, thereby enabling the support beams placed on the support beam placement frame 23 to be transported. Support beams of appropriate length are placed on the placement block assembly 233 according to the different sizes of the tricycle carriage floor, facilitating the transport of the support beams and thus aiding welding (i.e., ensuring that both ends of the support beam are placed in the slots 2334 on the two fixed blocks 2331 respectively (when the support beam is long) or... The support beam is placed in the slot 2335 on the two movable blocks 2332 (when the length of the support beam is short); after the support beam placement frame 23 moves to the position corresponding to the floor of the tricycle, the lifting cylinder 24 is activated, and the crossbar 241 and the support 242 can move closer to the position of the connecting rod 2333 at the same time, so that the connecting rod 2333 and the movable block 2332 can be lifted from the placement slot 232, and the support beam can be lifted to the position that matches the floor of the tricycle for welding operations.

[0052] When the support beam is long (because the width of slot 2335 is greater than the width of slot 1 2334, or when the support beam is wide), the connecting rod 2333 is pulled outward from the placement slot 232, causing the side sliders 2336 on the movable block 2332 to slide in the corresponding slider slots 2337. When the movable block 2332 slides to the outside of the slider slots 2337 (at this time, the bottom surface of the movable block 2332 and the top surface of the fixed block 2331 are on the same horizontal plane, and the lower slider 2338 on the bottom surface of the movable block 2332 corresponds to the position of slot 1 2334), the return spring 2339... Under the action of the lever, the movable block 2332 can slide away from the connecting rod 2333, that is, the movable block 2332 can slide in the slot 1 2334. The distance between the two movable blocks 2332 is at its maximum at this time. Then, the two ends of the support beam in the length direction can be placed in the slot 2335 on the two movable blocks 2332 respectively. After the support beam moves to a position that matches the floor of the tricycle, the lifting cylinder 24 is activated. The connecting rod 2333, the movable block 2332 and the support beam placed on the movable block 2332 can be lifted at the same time through the support 242 so that the support beam can be welded to the floor of the tricycle.

[0053] The connecting rod 2333 has a rectangular cross-sectional shape, and the support 242 is provided with a groove with the same cross-sectional shape as the connecting rod 2333. This facilitates the stability of the moving connecting rod 2333 when the support 242 lifts the connecting rod 2333, thereby ensuring the stability of the support beam position and improving the welding quality.

[0054] The movable block 2332 is made of magnetic material, so that when the movable block 2332 is located in the slider groove 2337 or on the top surface of the fixed block 2331, it can be attracted to the fixed block 2331, which helps to keep the movable block 2332 from falling off.

[0055] Example 3

[0056] Based on Example 1, such as Figure 1 , Figure 4 , Figure 7 As shown, positioning guide grooves 6 are provided on the side wall of the placement rack base plate 231 near the end of the frame conveyor table 3 and the side wall near the end of the frame unloading table 4. Multiple guide rods that are adapted to the positioning guide grooves 6 are horizontally arranged on the welding table 1. The guide rods are slidably set in the positioning guide grooves 6 at the corresponding positions. When the conveyor belt 213 moves the placement rack base plate 231, the guide rods can be inserted into the positioning guide grooves 6 at the corresponding positions (at this time, as the conveyor belt 213 continues to convey, the guide rods can slide in the positioning guide grooves 6 at the corresponding positions), so that the position of the placement rack base plate 231 can be kept stable when the conveyor belt 213 moves, which helps to improve the accuracy of the welding position of the support beam on the tricycle carriage floor.

[0057] Example 4

[0058] Based on Example 1, such as Figure 1 As shown, multiple pneumatic clamping cylinders 251 are evenly distributed circumferentially on the top surface of the operating platform 25. Notch slots 252 are provided on the top surface of the operating platform 25 near the end of the frame conveying platform 3 and near the end of the frame unloading platform 4. The bottom surface of the notch slots 252 is on the same horizontal plane as the top surface of the frame unloading platform 4. The pneumatic clamping cylinders 251 can clamp and fix the tricycle carriage floor plate placed on the operating platform 25, which helps to improve the accuracy of the welding position of the support beam on the tricycle carriage floor plate.

[0059] The notch 252 is designed to facilitate the placement of the tricycle cargo box floor plate from the lifting plate 33 (the lifting cylinder 32 can drive the lifting plate 33 to lift, making it easy for the operator to place the tricycle cargo box floor plate on the lifting plate 33) through the notch 252 on the top surface of the operating platform 25 near the end of the frame conveying platform 3 before welding, so as to facilitate the welding of the support beam to the tricycle cargo box floor plate; at the same time, after welding is completed, the tricycle cargo box floor plate on the operating platform 25 can be placed through the notch 252 on the top surface of the operating platform 25 near the end of the frame unloading platform 4 to the frame unloading platform 4 to complete the unloading.

[0060] Example 5

[0061] Based on Example 1, such as Figure 4As shown, the lifting cylinders 24 are spaced apart along the conveying direction of the conveyor belt 213, and the distance between two adjacent lifting cylinders 24 is adapted to the distance between two adjacent through slots 22. This allows the lifting cylinders 24 at the corresponding positions to be activated according to the need for welding the support beam to different positions on the tricycle car floor, thereby lifting the support beam to the position on the tricycle car floor, which facilitates the welding operation and allows the production of tricycle car floor plates with various requirements, thus improving applicability.

[0062] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A robotic welding fixture for a tricycle carriage, characterized in that, include: Welding station (1); Support beam conveyor belt assembly (2), the support beam conveyor belt assembly (2) is set on welding table (1); Chassis conveyor (3); The frame unloading platform (4), the frame conveying platform (3), and the frame unloading platform (4) are respectively set on opposite sides of the welding platform (1); Robotic arm laser welding machine (5) is set on top of welding table (1), and the position of robotic arm laser welding machine (5) corresponds vertically to the position of frame conveyor table (3). Among them, the support beam conveyor belt assembly (2) includes an operating platform (25) and a conveyor belt (21) arranged sequentially from top to bottom. Multiple through slots (22) and multiple support beam placement frames (23) are arranged on the conveyor belt (21) along the conveying direction. The through slots (22) and support beam placement frames (23) are arranged alternately. Multiple lifting cylinders (24) are arranged below the conveyor belt (21). The frame conveying platform (3) includes a support platform (31) set outside the welding platform (1), a lifting cylinder (32) is set on the bottom surface of the support platform (31), and a lifting plate (33) is set on the piston rod of the lifting cylinder (32). The support beam placement frame (23) includes a placement frame base plate (231), which is embedded in the conveyor belt (21); The placement slot (232) is set inside the base plate (231) of the placement rack; Placement block group (233), there are two placement block groups (233), and the two placement block groups (233) are respectively placed in the opposite ends of the placement slot (232); The placement block group (233) includes a fixed block (2331); The movable block (2332), the fixed block (2331) and the movable block (2332) are arranged side by side in the placement slot (232), and the two movable blocks (2332) are located between the two fixed blocks (2331); The connecting rod (2333) is movably connected to two movable blocks (2332) at both ends along its length. Card slot 1 (2334) is provided in multiple ways, and each fixing block (2331) has a card slot 1 (2334) on its top surface. Slot 2 (2335) is provided in multiple ways, and each movable block (2332) has a slot 2 (2335) on its top surface. The length direction of slot 1 (2334) is the same as the length direction of slot 2 (2335), and the width of slot 2 (2335) is greater than the width of slot 1 (2334). The movable block (2332) has side sliders (2336) on its two opposing side walls. The inner wall of the placement groove (232) has vertically arranged slider grooves (2337) that correspond one-to-one with the side sliders (2336). The side sliders (2336) are slidably arranged in the corresponding slider grooves (2337). The bottom surface of the movable block (2332) has a lower slider (2338) that is compatible with the first slot (2334). The two ends of the connecting rod (2333) in the length direction respectively move through the two movable blocks (2332), and both ends of the connecting rod (2333) in the length direction are horizontally provided with return springs (2339), and the end of the return spring (2339) away from the connecting rod (2333) is connected to the movable block (2332).

2. The robotic welding fixture for a tricycle carriage as described in claim 1, characterized in that, The conveyor belt (21) includes: Drive roller (211); The driven roller (212), the driving roller (211), and the driven roller (212) are arranged side by side at intervals below the operating table (25); The conveyor belt (213) is a closed-loop structure. The conveyor belt (213) is sleeved on the outside of the drive roller (211) and the driven roller (212). The through groove (22) and the support beam placement frame (23) are staggered along the conveying direction of the conveyor belt (213).

3. The robotic welding fixture for a tricycle carriage as described in claim 1, characterized in that, Positioning guide grooves (6) are provided on the side wall of the base plate (231) near the end of the frame conveyor (3) and the side wall near the end of the frame unloading platform (4). Multiple guide rods that are compatible with the positioning guide grooves (6) are horizontally arranged on the welding table (1). The guide rods are slidably arranged in the positioning guide grooves (6) at the corresponding positions.

4. The robotic welding fixture for a tricycle carriage as described in claim 1, characterized in that, Multiple pneumatic clamping cylinders (251) are evenly distributed along the circumference on the top surface of the operating table (25). The top surface of the operating table (25) is provided with notches (252) at the end near the frame conveyor (3) and the end near the frame unloading platform (4). The bottom surface of the notches (252) is on the same horizontal plane as the top surface of the frame unloading platform (4).

5. The robotic welding fixture for a tricycle carriage as described in claim 1, characterized in that, A horizontal rod (241) is provided on the piston rod of the lifting cylinder (24). The length direction of the horizontal rod (241) is parallel to the length direction of the connecting rod (2333). A support (242) is provided on the horizontal rod (241). The position of the support (242) is adapted to the position of the connecting rod (2333).

6. The robotic welding fixture for a three-wheeled vehicle carriage as described in claim 2, characterized in that, The lifting cylinders (24) are spaced apart along the conveying direction of the conveyor belt (213), and the distance between two adjacent lifting cylinders (24) is matched with the distance between two adjacent through slots (22).

Images