Welding frame for automobile production

Abstract

The invention discloses a welding frame for automobile production, and belongs to the technical field of automobile manufacturing, the welding frame for automobile production comprises a welding frame, a lower clamping mechanism is fixedly mounted in the welding frame, a moving plate is slidably connected in the welding frame, and an upper clamping mechanism is fixedly mounted on the lower surface of the moving plate; a rotating mechanism is rotatably connected to the surface of the moving plate, a welding mechanism is fixedly mounted in the rotating mechanism, a shade is fixedly mounted on the lower surface of the moving plate, a driving mechanism is fixedly mounted on the surface of the welding frame, and an air draft mechanism and an upper clamping mechanism are fixedly mounted on the surface of the shade to clamp and fix a transmission shaft. The lower clamping mechanism clamps and fixes the spline shaft, the transmission shaft and the spline shaft are located in the middle in the clamping process, the transmission shaft and the spline shaft can be kept on the same central axis all the time, the axial deviation problem can be avoided during welding, and the uniformity of welding seams is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile manufacturing, and particularly relates to a welding rack for automobile production. Background Art

[0002] Welding, also known as fusion welding, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. Welding is widely used in the production of automobile parts. As important parts in automobile manufacturing, the drive shaft and the spline shaft need to be clamped by a welding rack to facilitate welding.

[0003] Currently, in the production process of automobile transmission system components, the welding process of the drive shaft and the spline shaft still generally adopts the manual holding operation method. In the specific operation process, the operator needs to hold the drive shaft tube body and the spline shaft component at the same time, and perform the welding operation while keeping the two central axes theoretically coincident. In actual operation, due to the weight of the drive shaft assembly being 5 - 15 kg and the cantilever structure characteristics of the slender parts, it is difficult for the operator to maintain the coaxial positioning of the two components for a long time. According to industry research data, when manually holding and welding, the axis offset is generally controlled within ±1.5 mm. However, in actual production, due to factors such as arm tremors and breathing effects, about 30% of the weldments have an axial offset exceeding ±0.8 mm, resulting in problems such as uneven weld formation and inconsistent penetration. This process defect directly affects the bearing capacity of the welded joint surface and may cause faults such as vibration noise and stress concentration during the subsequent operation of the whole vehicle. Especially in the heavy-duty working conditions of commercial vehicles, fatigue cracks are likely to occur at the welded joints, and in severe cases, it may cause the failure of the transmission system.

[0004] Therefore, there is an urgent need to provide a welding rack for automobile production to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a welding rack for automobile production, including a welding frame. A lower clamping mechanism is fixedly installed inside the welding frame. A moving plate is slidably connected inside the welding frame, and further includes; An upper clamping mechanism is fixedly installed on the lower surface of the moving plate. A rotating mechanism is rotatably connected to the surface of the moving plate, and a welding mechanism is fixedly installed inside the rotating mechanism; A mask is fixedly installed on the lower surface of the moving plate. The upper clamping mechanism, the rotating mechanism and the welding mechanism are all arranged inside the mask. A driving mechanism is fixedly installed on the surface of the welding frame, and an air extraction mechanism is fixedly installed on the surface of the mask.

[0006] The present invention is further provided as: Symmetrical through grooves are formed on the surface of the welding frame, and a guide rod is fixedly installed inside one of the through grooves.

[0007] Through the above technical solution, the through groove facilitates the lifting of the moving plate, so that the upper clamping mechanism and the lower clamping mechanism can approach each other, and the arrangement of the guide rod makes the moving plate more stable during lifting.

[0008] The present invention is further configured as follows: the lower clamping mechanism includes a fixed table, the fixed table is fixedly installed on the surface of the welding frame, a plurality of first support columns are fixedly installed on the surface of the fixed table, a fixed ring is fixedly installed at the end of the first support column, a rotating ring is rotatably connected inside the fixed ring, a convex block is fixedly installed on the surface of the rotating ring, a first screw sleeve is fixedly installed on the surface of the convex block, a plurality of connecting blocks are fixedly installed on the surface of the rotating ring, a top ring is fixedly installed at the end of the connecting block, a plurality of positioning holes are formed on the surface of the top ring, a plurality of second support columns are fixedly installed on the surface of the fixed table, a bracket is rotatably connected at the end of the second support column, the bracket is rotatably connected inside the rotating ring and the top ring, a first chuck is fixedly installed at the end of the bracket, a chute is formed on the surface of the bracket, a slider is slidably connected to the surface of the chute, and a positioning column is fixedly installed on the surface of the slider and is rotatably connected inside the positioning hole.

[0009] Through the above technical solution, the lower clamping mechanism is used for clamping the spline shaft. The first support column supports the fixed ring. The rotating ring can rotate inside the fixed ring, so that the three groups of brackets can gather towards the middle of the rotating ring to clamp the spline shaft. The cooperation of the first screw rod and the first screw sleeve enables the rotating ring to rotate. The slider can slide inside the chute, so that the bracket can be dispersed and gathered. The cooperation of the positioning column and the positioning hole enables the slider to stay in the middle of the top ring and the rotating ring when sliding.

[0010] The present invention is further configured as follows: a third support column is fixedly installed on the surface of the fixed table, a rotating block is rotatably connected to the surface of the third support column, a first motor is fixedly installed on the surface of the rotating block, an output end of the first motor is drivingly connected to a first screw rod, and the first screw rod is threadedly connected to the first screw sleeve.

[0011] Through the above technical solution, when the spline shaft is placed inside the rotating ring, the first motor is started, the first screw rod rotates, so that the first screw sleeve moves forward, further enabling the convex block to move, driving the rotating ring to rotate. When the rotating ring rotates, due to the cooperation of the positioning hole and the positioning column, the slider can slide in the chute on the surface of the bracket. The slider guides the bracket, enabling the bracket to adjust the angle. The three groups of brackets move closer to the middle position of the rotating ring, stably clamping the spline shaft and making the spline shaft located in the middle of the rotating ring, so as to carry out subsequent welding work.

[0012] The present invention is further configured such that: an annular groove is formed inside the moving plate, a connecting groove is formed on the surface of the moving plate, and the moving plate is slidably connected to the surface of the guide rod.

[0013] Through the above technical solution, the annular groove is provided for the rotation of the annular toothed plate, the connecting groove provides space for the meshing of the gear and the annular toothed plate, and the guide rod makes the moving plate more stable when lifting and lowering.

[0014] The present invention is further configured such that: the upper clamping mechanism includes a clamping table, the clamping table is fixedly installed on the lower surface of the moving plate, a clamping hole is formed inside the clamping table, a sleeve is fixedly installed inside the clamping hole, a first spring is fixedly installed inside the sleeve, one end of the first spring is fixedly connected to a limiting ring, the limiting ring is slidably connected inside the sleeve, a connecting rod is fixedly installed on the surface of the limiting ring, a placing table is fixedly installed at the end of the connecting rod, symmetric clamping grooves are formed on the surface of the placing table, a plurality of rotating grooves are formed inside the clamping table, a rotating frame is rotatably connected inside the rotating groove, one end of the rotating frame is in active contact with the surface of the placing table, a second clamping head is fixedly installed at the other end of the rotating frame, a rotating shaft is fixedly installed inside the rotating frame, the rotating shaft is rotatably connected inside the rotating groove, a receiving groove is formed inside the clamping table, a second spring is fixedly connected inside the receiving groove, a clamping block is fixedly connected to the end of the second spring, the clamping block is movably inserted into the clamping groove, a pull rod is fixedly installed on the surface of the clamping block, and one end of the pull rod penetrates through the middle of the second spring and extends to the outside of the clamping table.

[0015] Through the above technical solution, when it is necessary to clamp the transmission shaft, one end of the transmission shaft is brought into contact with the surface of the placing table and the placing table is squeezed to move upward inside the clamping hole. At this time, through the setting of the connecting rod, the limiting ring squeezes the first spring, and the first spring is in a compressed state inside the sleeve. When the placing table moves upward, it contacts the ends of the four rotating frames, so that the rotating frames rotate. The second clamping head at the other end of the rotating frame contacts the surface of the transmission shaft. When the transmission shaft is fixed in the middle of the placing table and effectively clamped, at the same time, the placing table contacts the clamping block. After being squeezed by the placing table, the clamping block is temporarily retracted into the receiving groove. When the clamping groove and the clamping block are at the same horizontal plane, the second spring pops out the clamping block, and the clamping block is inserted into the clamping groove to fix the placing table, so that the second clamping head can continuously clamp the surface of the transmission shaft. After the welding work is completed, just pull the pull rod, the clamping block is removed from the clamping groove, the limit on the placing table is cancelled, the first spring rebounds, the placing table moves downward inside the clamping hole, and the rotating frame rotates back after losing pressure, so as to cancel the clamping of the transmission shaft, and the welded transmission shaft and the spline shaft can be taken away.

[0016] The present invention is further configured as follows: The rotating mechanism includes a second motor, which is fixedly installed on the surface of the moving plate. The output end of the second motor is drivingly connected to a first transmission rod. A gear is fixedly installed at the end of the first transmission rod. The gear is rotatably connected inside the mating groove. An annular gear plate is rotatably connected inside the moving plate. The annular gear plate is rotatably connected inside the annular groove. The gear meshes with the annular gear plate. The welding mechanism includes a support frame, which is fixedly installed on the lower surface of the annular gear plate. A third motor is fixedly installed on the surface of the support frame. The output end of the third motor is drivingly connected to a second screw rod. A second screw sleeve is threadedly connected to the surface of the second screw rod. A welding head is fixedly installed on the surface of the second screw sleeve.

[0017] Through the above technical solution, the rotating mechanism is used for the rotating work of the welding mechanism. Start the second motor, the first transmission rod drives the gear to rotate. Due to the meshing relationship between the gear and the annular gear plate, the annular gear plate can rotate, driving the welding mechanism to rotate and perform welding work around the connection of the transmission shaft and the spline shaft. When the transmission shaft and the spline shaft are fixed and then brought closer, start the third motor, the second screw rod rotates to drive the second screw sleeve to move, so that the height of the welding head can be adjusted. At this time, the welding head and the connection of the transmission shaft and the spline shaft are on the same horizontal plane, facilitating more precise welding work.

[0018] The present invention is further configured as follows: A mask is fixedly installed on the lower surface of the moving plate. A sealing door is hinged on the surface of the mask. A handle and a first fixing block are fixedly installed on the surface of the sealing door. Symmetric second fixing blocks are fixedly installed on the surface of the mask. The first fixing block is slidably connected between the two second fixing blocks. Pins are movably inserted into both the first fixing block and the second fixing block. A through groove is opened on the lower surface of the mask. The fixing table is slidably connected inside the through groove.

[0019] Through the above technical solution, the mask is used to block the fumes generated during welding. By inserting the pins into the first fixing block and the second fixing block, the sealing door and the mask can be sealed. Open the sealing door when the transmission shaft needs to be clamped. When the transmission shaft and the spline shaft are brought closer, the moving plate moves downward, and the fixing table is inserted into the through groove, and the mask forms a seal to prevent the fumes from leaking during welding and causing environmental pollution.

[0020] The present invention is further configured as follows: The driving mechanism includes a fourth motor, which is fixedly installed on the surface of the welding frame. The output end of the fourth motor is drivingly connected to a third screw rod. The moving plate is threadedly connected to the surface of the third screw rod.

[0021] Through the above technical solution, when both the transmission shaft and the spline shaft are clamped and fixed, start the fourth motor, the third screw rod rotates, so that the moving plate can move downward, and the welding joint of the transmission shaft and the spline shaft is brought into contact for welding work.

[0022] The present invention is further configured as follows: The air extraction mechanism includes a protective housing fixedly installed on the surface of the mask. A wind pipe is fixedly connected inside the protective housing. A fifth motor is fixedly installed on the surface of the wind pipe. The output end of the fifth motor is drivingly connected to a second transmission rod. A fan is fixedly installed at the end of the second transmission rod. The fan is rotatably connected inside the protective housing. A filter plate is fixedly installed inside the wind pipe.

[0023] Through the above technical solution, the air extraction mechanism processes the flue gas inside the mask. The fifth motor is started, and the second transmission rod drives the fan to rotate, so that the welding flue gas can be pumped into the wind pipe and discharged after being filtered by the filter plate, reducing air pollution.

[0024] The beneficial effects of the present invention are as follows: 1. The present invention is provided with an upper clamping mechanism and a lower clamping mechanism. The upper clamping mechanism clamps and fixes the transmission shaft, and the lower clamping mechanism clamps and fixes the spline shaft. During the clamping process, the transmission shaft and the spline shaft are respectively located in the middle position, enabling the two to always remain on the same central axis, and avoiding axial offset problems during welding, improving the uniformity of the weld seam; 2. The present invention is provided with a mask and an air extraction mechanism. The mask forms a sealed environment with the lower clamping mechanism during welding, preventing the flue gas generated during welding from leaking to the outside, and at the same time preventing the sparks generated by welding from causing damage to the human body. The air extraction mechanism extracts the flue gas, enabling the flue gas to gather inside the wind pipe and undergo purification treatment, reducing air pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a three-dimensional sectional structural schematic diagram of the present invention; Figure 3 is a structural schematic diagram of the lower clamping mechanism of the present invention; Figure 4 is an exploded structural schematic diagram of the lower clamping mechanism of the present invention; Figure 5 is a structural schematic diagram of the upper clamping mechanism of the present invention; Figure 6 is a structural schematic diagram of the rotating mechanism of the present invention; Figure 7 is a structural schematic diagram of the welding mechanism of the present invention; Figure 8 is a structural schematic diagram of the mask of the present invention; Figure 9 is Figure 2 the enlarged view at A in Figure 10 isFigure 5 Enlarged view at B in the figure.

[0026] Reference numerals: 1, welding frame; 11, through groove; 12, guide rod; 2, lower clamping mechanism; 21, fixed table; 22, first support column; 221, fixing ring; 23, rotating ring; 231, convex block; 232, first screw sleeve; 233, connecting block; 234, top ring; 235, positioning hole; 24, second support column; 241, bracket; 242, first chuck; 243, chute; 244, slider; 245, positioning column; 25, third support column; 251, rotating block; 26, first motor; 261, first screw; 3, moving plate; 31, annular groove; 32, connecting groove; 4, upper clamping mechanism; 41, clamping table; 42, clamping hole; 421, sleeve; 422, first spring; 43, limiting ring; 431, connecting rod; 44, placing table; 441, clamping groove; 45, rotating groove; 46, rotating frame; 461, second chuck; 462, rotating shaft; 47, accommodating groove; 471, second spring; 48, clamping block; 49, pull rod; 5, rotating mechanism; 51, second motor; 52, first transmission rod; 53, gear; 54, annular toothed plate; 6, welding mechanism; 61, support frame; 62, third motor; 63, second screw; 64, second screw sleeve; 65, welding head; 7, mask; 71, sealing door; 72, handle; 73, first fixing block; 74, second fixing block; 75, bolt; 76, through slot; 8, driving mechanism; 81, fourth motor; 82, third screw; 9, exhaust mechanism; 91, protective housing; 92, air duct; 93, fifth motor; 94, second transmission rod; 95, fan; 96, filter plate. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Please refer to Figures 1 - 10 , this application provides a welding rack for automobile production, including a welding frame 1, a lower clamping mechanism 2 is fixedly installed inside the welding frame 1, and a moving plate 3 is slidably connected inside the welding frame 1.

[0029] As Figure 2 shown, symmetrical through grooves 11 are formed on the surface of the welding frame 1, and a guide rod 12 is fixedly installed inside one of the through grooves 11.

[0030] In this embodiment, further, the through grooves 11 facilitate the lifting of the moving plate 3, so that the upper clamping mechanism 4 and the lower clamping mechanism 2 can approach each other, and the arrangement of the guide rods 12 makes the moving plate 3 more stable during lifting.

[0031] As Figure 3 shown in Figure 4 Figure [5], the lower clamping mechanism 2 includes a fixed platform 21 fixedly installed on the surface of the welding frame 1. A plurality of first support columns 22 are fixedly installed on the surface of the fixed platform 21. A fixed ring 221 is fixedly installed at the end of the first support column 22. A rotating ring 23 is rotatably connected inside the fixed ring 221. A convex block 231 is fixedly installed on the surface of the rotating ring 23. A first screw sleeve 232 is fixedly installed on the surface of the convex block 231. A plurality of connecting blocks 233 are fixedly installed on the surface of the rotating ring 23. A top ring 234 is fixedly installed at the end of the connecting block 233. A plurality of positioning holes 235 are formed on the surface of the top ring 234. A plurality of second support columns 24 are fixedly installed on the surface of the fixed platform 21. A bracket 241 is rotatably connected to the end of the second support column 24. The bracket 241 is rotatably connected inside the rotating ring 23 and the top ring 234. A first chuck 242 is fixedly installed at the end of the bracket 241. A chute 243 is formed on the surface of the bracket 241. A slider 244 is slidably connected to the surface of the chute 243. A positioning column 245 is fixedly installed on the surface of the slider 244. The positioning column 245 is rotatably connected inside the positioning hole 235.

[0032] In this embodiment, further, the lower clamping mechanism 2 is used for clamping a spline shaft. The first support column 22 plays a supporting role for the fixed ring 221. The rotating ring 23 can rotate inside the fixed ring 221, so that the three groups of brackets 241 can gather towards the middle of the rotating ring 23 to clamp the spline shaft. Through the cooperation of the first screw rod 261 and the first screw sleeve 232, the rotating ring 23 can be rotated. The slider 244 can slide inside the chute 243, so that the bracket 241 can be dispersed and gathered. The positioning column 245 and the positioning hole 235 cooperate to keep the slider 244 in the middle of the top ring 234 and the rotating ring 23 when sliding.

[0033] As Figure 3 shown in Figure 4 Figure [6], a third support column 25 is fixedly installed on the surface of the fixed platform 21. A rotating block 251 is rotatably connected to the surface of the third support column 25. A first motor 26 is fixedly installed on the surface of the rotating block 251. The output end of the first motor 26 is drivingly connected to a first screw rod 261. The first screw rod 261 is threadedly connected to the first screw sleeve 232.

[0034] It should be noted that there seems to be a missing figure number in the original text. Here, I assume it as Figure [5] and Figure [6] for the sake of translation integrity. You can adjust it according to the actual situation.In this embodiment, further, when the spline shaft is placed inside the rotating ring 23, the first motor 26 is started, and the first screw 261 rotates, so that the first nut 232 moves forward, further enabling the convex block 231 to move, driving the rotating ring 23 to rotate. When the rotating ring 23 rotates, due to the cooperation between the positioning hole 235 and the positioning post 245, the slider 244 can slide in the chute 243 on the surface of the bracket 241. The slider 244 guides the bracket 241, enabling the bracket 241 to adjust its angle. The three brackets 241 move closer to the middle position of the rotating ring 23, stably clamping the spline shaft while positioning the spline shaft at the middle of the rotating ring 23, thereby performing subsequent welding work.

[0035] As Figure 2 shown, a ring groove 31 is formed inside the moving plate 3, a connecting groove 32 is formed on the surface of the moving plate 3, and the moving plate 3 is slidably connected to the surface of the guide rod 12.

[0036] In this embodiment, further, the ring groove 31 is provided for the rotation of the annular toothed plate 54, the connecting groove 32 provides space for the meshing of the gear 53 and the annular toothed plate 54, and the guide rod 12 makes the moving plate 3 more stable during lifting and lowering.

[0037] An upper clamping mechanism 4 is fixedly installed on the lower surface of the moving plate 3, a rotating mechanism 5 is rotatably connected to the surface of the moving plate 3, and a welding mechanism 6 is fixedly installed inside the rotating mechanism 5.

[0038] As Figure 5As shown in the figure, the upper clamping mechanism 4 includes a clamping table 41, which is fixedly installed on the lower surface of the moving plate 3. A clamping hole 42 is formed inside the clamping table 41. A sleeve 421 is fixedly installed inside the clamping hole 42. A first spring 422 is fixedly installed inside the sleeve 421. One end of the first spring 422 is fixedly connected to a limiting ring 43, which is slidably connected inside the sleeve 421. A connecting rod 431 is fixedly installed on the surface of the limiting ring 43. A placing table 44 is fixedly installed at the end of the connecting rod 431. Symmetrical clamping grooves 441 are formed on the surface of the placing table 44. A plurality of rotating grooves 45 are formed inside the clamping table 41. A rotating frame 46 is rotatably connected inside the rotating groove 45. One end of the rotating frame 46 is movably attached to the surface of the placing table 44. A second clamping head 461 is fixedly installed at the other end of the rotating frame 46. A rotating shaft 462 is fixedly installed inside the rotating frame 46, and the rotating shaft 462 is rotatably connected inside the rotating groove 45. An accommodating groove 47 is formed inside the clamping table 41. A second spring 471 is fixedly connected inside the accommodating groove 47. A clamping block 48 is fixedly connected to the end of the second spring 471. The clamping block 48 is movably inserted inside the clamping groove 441. A pull rod 49 is fixedly installed on the surface of the clamping block 48. One end of the pull rod 49 penetrates through the middle of the second spring 471 and extends to the outside of the clamping table 41.

[0039] In this embodiment, further, when it is necessary to clamp the transmission shaft, one end of the transmission shaft is brought into contact with the surface of the placing table 44, and the placing table 44 is squeezed to move upward inside the clamping hole 42. At this time, through the setting of the connecting rod 431, the limiting ring 43 squeezes the first spring 422, and the first spring 422 is in a compressed state inside the sleeve 421. When the placing table 44 moves upward, it comes into contact with the ends of the four groups of rotating frames 46, so that the rotating frames 46 rotate. The second clamping heads 461 at the other ends of the rotating frames 46 come into contact with the surface of the transmission shaft. When the transmission shaft is fixed in the middle of the placing table 44 and effectively clamped, at the same time, the placing table 44 comes into contact with the clamping block 48. After being squeezed by the placing table 44, the clamping block 48 is temporarily retracted into the accommodating groove 47. When the clamping groove 441 and the clamping block 48 are at the same horizontal plane, the second spring 471 pops out the clamping block 48, and the clamping block 48 is inserted into the clamping groove 441 to fix the placing table 44, so that the second clamping heads 461 can continuously clamp the surface of the transmission shaft. After the welding work is completed, only need to pull the pull rod 49, the clamping block 48 is removed from the clamping groove 441, the limit on the placing table 44 is cancelled, the first spring 422 rebounds, the placing table 44 moves downward from inside the clamping hole 42, and the rotating frames 46 rotate back after losing pressure, so as to cancel the clamping of the transmission shaft, and the welded transmission shaft and the spline shaft can be taken away.

[0040] As Figure 6 with Figure 7As shown, the rotating mechanism 5 includes a second motor 51, which is fixedly installed on the surface of the moving plate 3. The output end of the second motor 51 is drivingly connected to a first transmission rod 52. The end of the first transmission rod 52 is fixedly installed with a gear 53, and the gear 53 is rotatably connected inside the mating groove 32. Inside the moving plate 3, an annular gear plate 54 is rotatably connected, and the annular gear plate 54 is rotatably connected inside the annular groove 31. The gear 53 meshes with the annular gear plate 54. The welding mechanism 6 includes a support frame 61, which is fixedly installed on the lower surface of the annular gear plate 54. The surface of the support frame 61 is fixedly installed with a third motor 62. The output end of the third motor 62 is drivingly connected to a second screw rod 63. A second screw sleeve 64 is threadedly connected to the surface of the second screw rod 63, and a welding head 65 is fixedly installed on the surface of the second screw sleeve 64.

[0041] In this embodiment, further, the rotating mechanism 5 is used for the rotating work of the welding mechanism 6. Start the second motor 51, the first transmission rod 52 drives the gear 53 to rotate. Due to the meshing relationship between the gear 53 and the annular gear plate 54, the annular gear plate 54 can rotate, driving the welding mechanism 6 to rotate for welding work around the connection of the transmission shaft and the spline shaft. When the transmission shaft and the spline shaft are fixed and then brought closer, start the third motor 62, the second screw rod 63 rotates to drive the second screw sleeve 64 to move, so that the height of the welding head 65 can be adjusted. At this time, the welding head 65 and the connection of the transmission shaft and the spline shaft are on the same horizontal plane, facilitating more accurate welding work.

[0042] A mask 7 is fixedly installed on the lower surface of the moving plate 3. The upper clamping mechanism 4, the rotating mechanism 5 and the welding mechanism 6 are all arranged inside the mask 7. A driving mechanism 8 is fixedly installed on the surface of the welding frame 1, and an air extraction mechanism 9 is fixedly installed on the surface of the mask 7.

[0043] As Figure 8 As shown, a mask 7 is fixedly installed on the lower surface of the moving plate 3. A sealing door 71 is hinged on the surface of the mask 7. A handle 72 and a first fixing block 73 are fixedly installed on the surface of the sealing door 71. Symmetric second fixing blocks 74 are fixedly installed on the surface of the mask 7. The first fixing block 73 is slidably connected between the two second fixing blocks 74. Pins 75 are movably inserted into both the first fixing block 73 and the second fixing blocks 74. A through groove 76 is opened on the lower surface of the mask 7, and the fixed table 21 is slidably connected inside the through groove 76.

[0044] In this embodiment, further, the mask 7 is used to block the fumes generated during welding. By inserting the bolt 75 into the first fixing block 73 and the second fixing block 74, the sealing door 71 and the mask 7 can be sealed. When it is necessary to clamp the transmission shaft, the sealing door 71 is opened. When the transmission shaft approaches the spline shaft, the moving plate 3 moves downward, and the fixing table 21 is inserted into the through groove 76. The mask 7 forms a seal to prevent the leakage of fumes during welding and avoid environmental pollution.

[0045] As Figure 2 shown, the driving mechanism 8 includes a fourth motor 81, which is fixedly installed on the surface of the welding frame 1. The output end of the fourth motor 81 is drivingly connected to a third screw 82, and the moving plate 3 is threadedly connected to the surface of the third screw 82.

[0046] In this embodiment, further, after the transmission shaft and the spline shaft are both clamped and fixed, the fourth motor 81 is started, and the third screw 82 rotates, so that the moving plate 3 can move downward to fit the welding joint of the transmission shaft and the spline shaft for welding work.

[0047] As Figure 2 And Figure 9 shown, the air extraction mechanism 9 includes a protective shell 91, which is fixedly installed on the surface of the mask 7. A wind pipe 92 is fixedly connected inside the protective shell 91. A fifth motor 93 is fixedly installed on the surface of the wind pipe 92. The output end of the fifth motor 93 is drivingly connected to a second transmission rod 94. The end of the second transmission rod 94 is fixedly installed with a fan 95. The fan 95 is rotatably connected inside the protective shell 91. A filter plate 96 is fixedly installed inside the wind pipe 92.

[0048] In this embodiment, further, the air extraction mechanism 9 processes the fumes inside the mask 7. The fifth motor 93 is started, and the second transmission rod 94 drives the fan 95 to rotate, so that the welding fumes can be sucked into the wind pipe 92 and discharged after being filtered by the filter plate 96, reducing air pollution.

[0049] The working principle of this embodiment is as follows. When it is necessary to clamp the transmission shaft, first, one end of the transmission shaft is brought into contact with the surface of the placement table 44, and the placement table 44 is squeezed to move upward inside the clamping hole 42. At this time, due to the arrangement of the connecting rod 431, the limiting ring 43 squeezes the first spring 422, and the first spring 422 is in a compressed state inside the sleeve 421. When the placement table 44 moves upward, it comes into contact with the ends of the four rotating frames 46, causing the rotating frames 46 to rotate. The second chuck 461 at the other end of the rotating frame 46 comes into contact with the surface of the transmission shaft, fixing the transmission shaft at the middle of the placement table 44 and effectively clamping the transmission shaft. At the same time, the placement table 44 comes into contact with the clamping block 48. After being squeezed by the placement table 44, the clamping block 48 is temporarily retracted into the receiving groove 47. When the clamping groove 441 and the clamping block 48 are at the same horizontal plane, the second spring 471 pops out the clamping block 48, and the clamping block 48 is inserted into the clamping groove 441 to fix the placement table 44, enabling the second chuck 461 to continuously clamp the surface of the transmission shaft. When the spline shaft is placed inside the rotating ring 23, the first motor 26 is started, and the first screw 261 rotates, causing the first nut 232 to move forward, further enabling the convex block 231 to move and driving the rotating ring 23 to rotate. When the rotating ring 23 rotates, due to the cooperative arrangement of the positioning hole 235 and the positioning post 245, the slider 244 can slide in the sliding groove 243 on the surface of the bracket 241. The slider 244 guides the bracket 241, enabling the bracket 241 to adjust its angle. The three brackets 241 move closer to the middle position of the rotating ring 23, stably clamping the spline shaft while keeping the spline shaft at the middle of the rotating ring 23. After the transmission shaft and the spline shaft are both clamped and fixed, the fourth motor 81 is started, and the third screw 82 rotates, causing the moving plate 3 to move downward. The transmission shaft and the spline shaft approach and fit together. The third motor 62 is started, and the second screw 63 rotates to drive the second nut 64 to move, enabling the height of the welding head 65 to be adjusted. At this time, the connection between the welding head 65 and the transmission shaft and the spline shaft is at the same horizontal plane. The second motor 51 is started, and the first transmission rod 52 drives the gear 53 to rotate. Due to the meshing relationship between the gear 53 and the annular gear plate 54, the annular gear plate 54 can rotate, driving the welding mechanism 6 to rotate and perform welding work around the connection between the transmission shaft and the spline shaft. When the moving plate 3 moves downward, the mask 7 follows and moves downward to form a seal with the fixed table 21. The fifth motor 93 is started, and the second transmission rod 94 drives the fan 95 to rotate, enabling the welding fumes to be pumped into the air duct 92 and discharged after being filtered by the filter plate 96.

[0050] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A welding rack for automobile production, comprising a welding frame (1), characterized in that, The lower clamping mechanism (2) is fixedly installed inside the welding frame (1). A moving plate (3) is slidably connected inside the welding frame (1). Further included are; The upper clamping mechanism (4) is fixedly installed on the lower surface of the moving plate (3). A rotating mechanism (5) is rotatably connected to the surface of the moving plate (3). The welding mechanism (6) is fixedly installed inside the rotating mechanism (5); A mask (7) is fixedly installed on the lower surface of the moving plate (3). The upper clamping mechanism (4), the rotating mechanism (5) and the welding mechanism (6) are all arranged inside the mask (7). The driving mechanism (8) is fixedly installed on the surface of the welding frame (1). The air extraction mechanism (9) is fixedly installed on the surface of the mask (7).

2. The welding frame for automobile production according to claim 1, wherein Symmetrical through grooves (11) are formed on the surface of the welding frame (1). A guide rod (12) is fixedly installed inside one of the through grooves (11).

3. A welding rack for automobile production according to claim 1, characterized in that, The lower clamping mechanism (2) includes a fixed table (21). The fixed table (21) is fixedly installed on the surface of the welding frame (1). A plurality of first support columns (22) are fixedly installed on the surface of the fixed table (21). A fixed ring (221) is fixedly installed at the end of the first support column (22). A rotating ring (23) is rotatably connected inside the fixed ring (221). A convex block (231) is fixedly installed on the surface of the rotating ring (23). A first screw sleeve (232) is fixedly installed on the surface of the convex block (231). A plurality of connecting blocks (233) are fixedly installed on the surface of the rotating ring (23). A top ring (234) is fixedly installed at the end of the connecting block (233). A plurality of positioning holes (235) are formed on the surface of the top ring (234). A plurality of second support columns (24) are fixedly installed on the surface of the fixed table (21). A bracket (241) is rotatably connected to the end of the second support column (24). The bracket (241) is rotatably connected inside the rotating ring (23) and the top ring (234). A first chuck (242) is fixedly installed at the end of the bracket (241). A chute (243) is formed on the surface of the bracket (241). A slider (244) is slidably connected to the surface of the chute (243). A positioning column (245) is fixedly installed on the surface of the slider (244). The positioning column (245) is rotatably connected inside the positioning hole (235).

4. The welding rack for automobile production according to claim 3, characterized in that, A third support column (25) is fixedly installed on the surface of the fixed table (21). A rotating block (251) is rotatably connected to the surface of the third support column (25). A first motor (26) is fixedly installed on the surface of the rotating block (251). The output end of the first motor (26) is drivingly connected to a first screw rod (261). The first screw rod (261) is threadedly connected to the first screw sleeve (232).

5. The welding frame for automobile production according to claim 2, wherein, An annular groove (31) is formed inside the moving plate (3). A connecting groove (32) is formed on the surface of the moving plate (3). The moving plate (3) is slidably connected to the surface of the guide rod (12).

6. A welding rack for automobile production according to claim 1, characterized in that, The upper clamping mechanism (4) includes a clamping table (41), the clamping table (41) is fixedly installed on the lower surface of the moving plate (3), a clamping hole (42) is formed inside the clamping table (41), a sleeve (421) is fixedly installed inside the clamping hole (42), a first spring (422) is fixedly installed inside the sleeve (421), one end of the first spring (422) is fixedly connected to a limit ring (43), the limit ring (43) is slidably connected inside the sleeve (421), a connecting rod (431) is fixedly installed on the surface of the limit ring (43), a placement table (44) is fixedly installed at the end of the connecting rod (431), symmetric clamping grooves (441) are formed on the surface of the placement table (44), a plurality of rotating grooves (45) are formed inside the clamping table (41), a rotating frame (46) is rotatably connected inside the rotating groove (45), one end of the rotating frame (46) is movably attached to the surface of the placement table (44), a second chuck (461) is fixedly installed at the other end of the rotating frame (46), a rotating shaft (462) is fixedly installed inside the rotating frame (46), the rotating shaft (462) is rotatably connected inside the rotating groove (45), a receiving groove (47) is formed inside the clamping table (41), a second spring (471) is fixedly connected inside the receiving groove (47), a clamping block (48) is fixedly connected to the end of the second spring (471), the clamping block (48) is movably inserted into the clamping groove (441), a pull rod (49) is fixedly installed on the surface of the clamping block (48), and one end of the pull rod (49) passes through the middle of the second spring (471) and extends to the outside of the clamping table (41).

7. A welding frame for automobile production according to claim 5, characterized in that, The rotating mechanism (5) includes a second motor (51), the second motor (51) is fixedly installed on the surface of the moving plate (3), the output end of the second motor (51) is drivingly connected to a first transmission rod (52), a gear (53) is fixedly installed at the end of the first transmission rod (52), the gear (53) is rotatably connected inside the mating groove (32), an annular gear plate (54) is rotatably connected inside the moving plate (3), the annular gear plate (54) is rotatably connected inside the annular groove (31), the gear (53) meshes with the annular gear plate (54), the welding mechanism (6) includes a support frame (61), the support frame (61) is fixedly installed on the lower surface of the annular gear plate (54), a third motor (62) is fixedly installed on the surface of the support frame (61), the output end of the third motor (62) is drivingly connected to a second screw rod (63), a second screw sleeve (64) is threadedly connected to the surface of the second screw rod (63), and a welding head (65) is fixedly installed on the surface of the second screw sleeve (64).

8. The welding frame for automobile production according to claim 3, characterized in that, A mask (7) is fixedly installed on the lower surface of the moving plate (3). A sealing door (71) is hinged on the surface of the mask (7). A handle (72) and a first fixing block (73) are fixedly installed on the surface of the sealing door (71). Symmetrical second fixing blocks (74) are fixedly installed on the surface of the mask (7). The first fixing block (73) is slidably connected between the two second fixing blocks (74). Pins (75) are movably inserted into the first fixing block (73) and the second fixing blocks (74). A through groove (76) is formed in the lower surface of the mask (7). The fixed table (21) is slidably connected inside the through groove (76).

9. A welding rack for automobile production according to claim 1, characterized in that, The driving mechanism (8) includes a fourth motor (81). The fourth motor (81) is fixedly installed on the surface of the welding frame (1). The output end of the fourth motor (81) is drivingly connected to a third screw rod (82). The moving plate (3) is threadedly connected to the surface of the third screw rod (82).

10. A welding rack for automobile production according to claim 1, characterized in that, The air extraction mechanism (9) includes a protective shell (91). The protective shell (91) is fixedly installed on the surface of the mask (7). An air duct (92) is fixedly connected inside the protective shell (91). A fifth motor (93) is fixedly installed on the surface of the air duct (92). The output end of the fifth motor (93) is drivingly connected to a second transmission rod (94). A fan (95) is fixedly installed at the end of the second transmission rod (94). The fan (95) is rotatably connected inside the protective shell (91). A filter plate (96) is fixedly installed inside the air duct (92).

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