A kind of operating vehicle body welding device and welding method

Abstract

The invention discloses a vehicle body welding device and a welding method, and relates to the technical field of vehicle body welding. The invention comprises a base, a support plate is arranged on the base, a screw is arranged on the support plate, a moving block is arranged on the screw, a connecting frame is arranged on the moving block, a reciprocating rod is arranged on the connecting frame, a moving ring is arranged on the reciprocating rod, a slider is arranged at the bottom of the moving ring, and a welding gun is arranged on the connecting frame; the connecting frame is driven to move by the screw, thereby driving the welding gun to move, and when the connecting frame moves, the first spring and the pull rope are driven to move by the moving ring, thereby driving the slider to move intermittently, and when the slider moves, the tail of the welding gun is driven to rotate, so that the gun head of the welding gun always maintains a certain angle with the edge of the corrugated steel plate, thereby improving the welding quality, and with the movement of the connecting frame, the gun head of the welding gun is flipped, so that the top of the corrugated steel plate can be welded, thereby improving the welding efficiency of the car body.

Description

Technical Field

[0001] The invention relates to the technical field of commercial vehicle body welding, and in particular to a commercial vehicle body welding device and a welding method. Background Art

[0002] In short, an operating vehicle is a vehicle used for commercial transportation. This type of vehicle covers two main categories: operating buses and operating trucks. Operating buses are vehicles used for commercial passenger transportation. That is, when passengers choose to ride in such vehicles, they need to pay a certain fee. These vehicles are defined and managed according to the standards of the transportation industry; the other category is operating trucks, whose main task is to transport or lease goods. Whether directly or indirectly, as long as it involves the collection of freight or rent, it falls into the category of operating trucks.

[0003] The body of an operating truck is the part used to carry people and loads, and is generally composed of a cab and a cargo box. The cargo box of an operating truck is usually composed of a frame and corrugated steel plates. When producing the cargo box of an operating truck, the corrugated steel plates need to be welded to both sides of the steel frame.

[0004] When welding the corrugated steel sheet to the cargo box frame, the corrugated steel sheet is usually first fixed to the frame by a machine, and then a welding machine is used to weld multiple welding points at the connection between the corrugated steel sheet and the frame to fix the frame and the corrugated steel sheet. In order to ensure the connection strength between the corrugated steel sheet and the frame and the sealing of the carriage, it is finally necessary to weld all the gaps between the corrugated steel sheet and the frame. In order to ensure the welding quality, the welding gun needs to maintain a certain angle with the weld during welding. The existing welding device cannot keep the welding gun and the S-shaped edge of the corrugated steel sheet at an appropriate angle during welding, which greatly affects the welding quality. Summary of the invention

[0005] The object of the present invention is to provide a commercial vehicle body welding device and a welding method to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a commercial vehicle body welding device, comprising a base, a support plate is arranged on the base, a screw is rotatably arranged on the support plate, a moving block is threadedly connected to the screw, a connecting frame is slidably arranged on the moving block, a reciprocating rod is rotatably arranged on the connecting frame, a moving ring is slidably arranged on the reciprocating rod, a slider is arranged at the bottom of the moving ring, the slider is slidably connected to the connecting frame, a welding gun is arranged on the connecting frame, an anti-rotation mechanism for preventing the end of the welding gun from rotating is arranged on the connecting frame, the slider is slidably connected to the welding gun, and a locking mechanism is rotatably arranged on the connecting frame.

[0007] Preferably, a connecting plate is fixedly provided at the bottom of the movable ring, a fixing frame is fixedly provided on the side of the connecting plate away from the slider, a movable plate is slidably provided in the fixing frame, a first spring is fixedly provided between the movable plate and the connecting plate, a pull rope is fixedly provided on the side of the movable plate close to the connecting plate, and an end of the pull rope away from the connecting plate is slidably connected to the slider.

[0008] Preferably, a sliding frame is fixedly provided on the connecting frame, the sliding block is slidably provided in the sliding frame, the locking mechanism includes a rotating rod rotatably provided on the top of the sliding frame, a plurality of locking frames are rotatably provided on the rotating rod, a locking block is fixedly provided on the top of the sliding block, and three abutment rods are fixedly provided on the outer peripheral surface of the rotating rod.

[0009] Preferably, six fixed plates are fixedly provided on the sliding frame, torsion springs are fixedly provided between each of the fixed plates and each of the locking plates in a one-to-one correspondence, a protrusion is fixedly provided on one side of each locking plate close to the abutment rod, and three unlocking plates are fixedly provided on the outer peripheral surface of the rotating rod.

[0010] Preferably, a sliding rod is slidably arranged on the slider, and two sliding grooves adapted to the sliding rod are opened on the outer peripheral surface of the welding gun. The anti-rotation mechanism includes a rotating ring rotatably arranged on a support plate, and a connecting rod is fixedly arranged on the top of the rotating ring. The end of the connecting rod away from the rotating ring is rotatably connected to the end of the welding gun.

[0011] Preferably, a corrugated groove is provided on the support plate, and a movable column adapted to the corrugated groove is fixedly provided at the bottom of the connecting frame, and the movable column is slidably arranged in the corrugated groove.

[0012] Preferably, a plurality of fourth springs are fixedly arranged between the rotating ring and the outer circumferential surface of the welding gun, a first lifting rod is fixedly arranged on the sliding rod, a second spring is fixedly arranged between the sliding rod and the inner top wall of the sliding block, a plurality of ratchets are fixedly arranged on the outer circumferential surface of the welding gun, a toothed ring is rotatably arranged on the welding gun, a pawl matching the ratchet is arranged in the toothed ring, a toothed plate is fixedly arranged at both ends of the support plate, and a top block is fixedly arranged on each toothed plate.

[0013] Preferably, a second lifting rod is fixedly provided on the sliding rod, a fixed block is fixedly provided on the sliding frame, an insertion rod is slidably provided on the fixed block, a lifting plate is fixedly provided on the insertion rod, a third spring is fixedly provided between the lifting plate and the fixed block, two sockets matching the insertion rod are provided on the rotating ring, and two fourth springs are fixedly provided between the rotating ring and the outer peripheral surface of the welding gun.

[0014] Preferably, a driven rod is rotatably arranged on the support plate, the reciprocating rod is slidably connected to the driven rod, a first sprocket is fixedly arranged at both ends of the screw rod, a second sprocket is fixedly arranged at both ends of the driven rod, and a chain meshing with the first sprocket and the second sprocket is arranged at both ends of the support plate.

[0015] A method for welding the body of an operating vehicle is implemented by the above-mentioned operating vehicle body welding device, and comprises the following steps: S: fixing the corrugated steel plate on the side wall of the frame, adjusting the height of the support plate, and aligning the welding gun head with the connection between the bottom of the corrugated steel plate and the frame; S: rotating the screw rod, starting the welding gun to weld the connection between the corrugated steel plate and the bottom of the frame; S: pausing the rotation of the screw rod, closing the welding gun, lifting the support plate to align the welding gun head with the connection between the corrugated steel plate and the top of the frame, rotating the screw rod again, and starting the welding gun to complete the welding.

[0016] In the above technical scheme, the present invention provides a commercial vehicle body welding device and a welding method, which have the following beneficial effects: the connecting frame is driven to move by the screw rod, thereby driving the welding gun to move; when the connecting frame moves, the first spring and the pull rope are driven to move by the moving ring, thereby driving the slider to move intermittently; when the slider moves, the tail of the welding gun is driven to rotate, so that the gun head of the welding gun always maintains a certain angle with the edge of the corrugated steel plate, which greatly improves the welding quality; as the connecting frame moves, the gun head of the welding gun is flipped, and the welding gun is lifted by the hydraulic cylinder, so that the top of the corrugated steel plate can be welded, thereby greatly increasing the welding efficiency of the commercial vehicle compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of a screw provided in an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the structure of a reciprocating rod provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the structure of a mobile ring provided in an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the structure of a first spring provided in an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of the structure of an abutment ball provided by an embodiment of the present invention;

[0024] Figure 7 The embodiment of the present invention provides Figure 2 A magnified view of the structure at center A;

[0025] Figure 8 A schematic diagram of the structure of a sliding rod provided in an embodiment of the present invention;

[0026] Fig. 9 A schematic diagram of the structure of a pull rope provided in an embodiment of the present invention;

[0027] Fig.10 A schematic diagram of the structure of a connecting rod provided in an embodiment of the present invention;

[0028] Fig.11 A schematic diagram of the structure of a tooth plate provided in an embodiment of the present invention;

[0029] Fig.12 The embodiment of the present invention provides Figure 3 A magnified view of the structure at B in the middle;

[0030] Fig.13 The embodiment of the present invention provides Figure 4 A magnified view of the structure at C in the middle;

[0031] Fig.14 A schematic diagram of the orientation of a welding gun tip provided in an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Base; 2. Hydraulic cylinder; 3. Servo motor; 4. Support plate; 5. Corrugated steel plate; 501. First inflection point; 502. Second inflection point; 503. Third inflection point; 504. Fourth inflection point; 6. Corrugated groove; 7. Moving column; 8. Welding gun; 801. Slide; 10. Screw; 11. Moving block; 12. Connecting frame; 13. Sliding frame; 14. Follower rod; 15. Reciprocating rod; 16. Moving ring; 17. Connecting plate; 18. Abutment ball; 21. Sliding block; 22. Fixed frame; 23. Moving plate; 24. First spring; 25. Pull rope; 26. Sliding rod; 27. The second spring; 28, the first lifting rod; 29, the second lifting rod; 31, the locking block; 32, the rotating rod; 33, the abutting rod; 34, the triangular plate; 35, the fixing plate; 36, the torsion spring; 37, the locking frame; 371, the locking plate; 38, the protrusion; 39, the unlocking plate; 41, the lifting plate; 42, the fixing block; 43, the third spring; 44, the plug rod; 45, the plug hole; 51, the ratchet; 52, the toothed ring; 53, the pawl; 54, the rotating ring; 55, the connecting rod; 56, the toothed plate; 57, the top block; 61, the first sprocket; 62, the second sprocket; 63, the chain; 64, the fourth spring. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] See also Figure 1-14A vehicle body welding device includes a base 1, a support plate 4 is arranged on the base 1, a screw 10 is rotatably arranged on the support plate 4, a moving block 11 is threadedly connected to the screw 10, a connecting frame 12 is slidably arranged on the moving block 11, a reciprocating rod 15 is rotatably arranged on the connecting frame 12, a moving ring 16 is slidably arranged on the reciprocating rod 15, a slider 21 is arranged at the bottom of the moving ring 16, the slider 21 is slidably connected to the connecting frame 12, a welding gun 8 is arranged on the connecting frame 12, and a The anti-rotation mechanism is used to prevent the end of the welding gun 8 from rotating. The slider 21 is slidably connected to the welding gun 8, and a locking mechanism is rotatably arranged on the connecting frame 12; a reciprocating spiral groove is provided on the outer circumference of the reciprocating rod 15, and an abutment ball 18 adapted to the reciprocating spiral groove is fixedly arranged in the moving block 11. The end of the welding gun 8 has a certain tilt angle, which can ensure that the gun head of the welding gun 8 and the edge of the corrugated steel plate 5 maintain an appropriate welding angle during welding. When in use, the corrugated steel plate 5 is first fixed on the frame, and then the support plate 4 is moved When the screw 10 rotates, the moving block 11 is driven to move, thereby driving the connecting frame 12 and the welding gun 8 to move, so as to weld the edge of the entire corrugated steel plate 5. When the screw 10 rotates, the reciprocating rod 15 is driven to rotate, and when the reciprocating rod 15 rotates, the moving ring 16 is driven to move and then the slider 21 is driven to slide back and forth on the connecting frame 12. When the slider 21 slides, the welding gun 8 is driven to rotate away from the tail of the corrugated steel plate 5. Since the end of the welding gun 8 close to the corrugated steel plate 5 is connected to the anti-rotation mechanism, when the tail of the welding gun 8 rotates, the position of the welding gun 8 will not change, but the direction of the gun head of the welding gun 8 will change, so as to adapt to the S-shaped edge of the corrugated steel plate 5. As the screw 10 rotates, the reciprocating rod 15 continuously drives the moving block 11 to move back and forth, thereby causing the direction of the welding gun 8 to change continuously, so that all the gaps between the corrugated steel plate 5 and the frame are welded.

[0036] Furthermore, a connecting plate 17 is fixedly provided at the bottom of the moving ring 16, a fixing frame 22 is fixedly provided on the side of the connecting plate 17 away from the slider 21, a moving plate 23 is slidably provided in the fixing frame 22, a first spring 24 is fixedly provided between the moving plate 23 and the connecting plate 17, a pull rope 25 is fixedly provided on the side of the moving plate 23 close to the connecting plate 17, and one end of the pull rope 25 away from the connecting plate 17 is slidably connected to the slider 21; when the reciprocating rod 15 rotates, the moving ring 16 is driven to move by the cooperation of the abutting ball 18 and the reciprocating spiral groove, and the moving ring 16 prevents the slider 21 from moving through the locking mechanism when moving. The pull rope 25 pulls the movable plate 23 toward the direction close to the connecting plate 17. At this time, the first spring 24 is compressed, and the welding gun 8 welds the corrugated steel sheet 5 as the movable block 11 moves. When the welding gun 8 moves to the inflection point of the corrugated steel sheet 5, the movable ring 16 squeezes the locking mechanism so that the locking mechanism unlocks the slider 21. At this time, the first spring 24 is extended, and the slider 21 is pulled to the position of the movable ring 16 through the movable plate 23 and the pull rope 25. When the slider 21 slides to the position of the movable ring 16, it drives the tail of the welding gun 8 to rotate, thereby changing the direction of the head of the welding gun 8, and then making the welding gun 8 always perpendicular to the hypotenuse of the corrugated steel sheet 5 in the horizontal position.

[0037] Furthermore, a sliding frame 13 is fixedly arranged on the connecting frame 12, and a slider 21 is slidably arranged in the sliding frame 13. The locking mechanism includes a rotating rod 32 rotatably arranged on the top of the sliding frame 13, and a plurality of locking frames 37 are rotatably arranged on the rotating rod 32. A locking block 31 is fixedly arranged on the top of the slider 21, and three abutting rods 33 are fixedly arranged on the outer peripheral surface of the rotating rod 32; a triangular plate 34 is arranged on the connecting plate 17, and the slider 21 slides in the sliding frame 13, such as Figure 4 As shown, there are six locking frames 37 and they are grouped in pairs. Three groups of locking frames 37 are evenly arranged on the rotating rod 32. The bottoms of the two locking plates 371 in the same group are set as inclined surfaces, and the abutment rods 33 are arranged one by one in the middle of the two locking frames 37 in the same group. When the slider 21 moves, the locking block 31 is locked by the locking plate 371, so that the slider 21 moves intermittently, thereby intermittently changing the direction of the head of the welding gun 8. When the moving ring 16 drives the connecting plate 17 to move, the triangular plate 34 also moves accordingly. When the hypotenuse of the triangular plate 34 abuts against the abutment rod 33, the abutment rod 33 can move downward. When the abutment rod 33 moves downward, the rotating rod 32 rotates, and then each locking plate 371 rotates upward, thereby separating the locking plate 371 from the locking block 31. At this time, the slider 21 is pulled toward the connecting plate 17 by the first spring 24 and the pull rope 25.

[0038] In another embodiment of the present invention, six fixing plates 35 are fixedly provided on the sliding frame 13, and torsion springs 36 are fixedly provided between each fixing plate 35 and each locking plate 371 in a one-to-one correspondence. A protrusion 38 is fixedly provided on one side of each locking plate 371 close to the abutment rod 33, and three unlocking plates 39 are fixedly provided on the outer peripheral surface of the rotating rod 32. When the sliding block 21 moves, it drives the locking block 31 to move back and forth. The locking block 31 will continuously abut against the locking plate 371 during the movement. The locking block 31 lifts the locking plate 371 through the inclined surface of the locking plate 371, and the locking block 31 is intercepted by another locking plate 371 of the same group as the lifted locking plate 371. When the inclined surface of the locking plate 371 separates from the locking block 31, The raised locking plate 371 is quickly restored to its original position through the torsion spring 36. At this time, the locking block 31 cannot move. When the connecting plate 17 continues to move to the end of the reciprocating spiral groove, the triangular plate 34 presses the abutting rod 33 at the end of the reciprocating spiral groove downward. At this time, the unlocking plate 39 rotates upward, and the corresponding locking plate 371 is lifted through each protrusion 38, so that the locking block 31 can move, and then the tail of the welding gun 8 is rotated through the movement of the slider 21 to change the direction of the head of the welding gun 8. The distance between the two ends of the reciprocating spiral groove is slightly larger than the distance between the locking plates 371 at the two ends of the rotating rod 32, thereby preventing the locking block 31 from moving in the opposite direction before reaching the two locking frames 37 at the end. Figure 4 and Fig.12 In the initial state, the locking block 31 is between the two locking plates 371 in the middle. When the moving ring 16 drives the triangular plate 34 to move from right to left, the locking block 31 does not move. At this time, the first spring 24 is compressed by the pull rope 25. When the triangular plate 34 moves to the abutment rod 33 on the left, the abutment rod 33 on the left is pressed downward. At this time, each locking plate 371 is lifted, and the slider 21 is moved to the left by the first spring 24. During the movement to the left, the slider 21 first abuts against the inner locking plate 371 of the two locking plates 371 on the left end. At this time, the inner locking plate 371 is lifted up, and the moving ring 16 continues to move to the reciprocating spiral groove on the left end. When the locking plate 371 on the inner side of the left end falls, the movable ring 16 moves to the left end of the reciprocating spiral groove, and then the reciprocating spiral groove moves to the right. When the bottom end of the triangular plate 34 presses down the abutting rod 33 in the middle, the slider 21 moves from left to right. During the movement of the slider 21, the bottom of the triangular plate 34 separates from the corresponding abutting rod 33. At this time, each locking plate 371 falls again, and the slider 21 continues to move. When the slider 21 abuts against the left one of the two middle locking plates 371, it is lifted, and the locking plate 371 on the right intercepts the locking block 31, so that the locking block 31 is between the two middle locking plates 371 for a period of time. Figure 3As shown, when the locking block 31 is between the two middle locking plates 371, the welding gun 8 head is perpendicular to the reciprocating rod 15, when the locking block 31 is between the two left locking plates 371, the welding gun 8 head faces the right side, and when the locking block 31 is between the two right locking plates 371, the welding gun 8 head faces the left side, thereby being able to adapt to different grooves of the corrugated steel plate 5.

[0039] Specifically, a sliding rod 26 is slidably arranged on the slider 21, and two sliding grooves 801 adapted to the sliding rod 26 are opened on the outer peripheral surface of the welding gun 8. The anti-rotation mechanism includes a rotating ring 54 rotatably arranged on the support plate 4, and a connecting rod 55 is fixedly arranged on the top of the rotating ring 54. The end of the connecting rod 55 away from the rotating ring 54 is rotatably connected to the end of the welding gun 8; in the initial state, the rotating ring 54 cannot rotate, and the sliding rod 26 is inserted into the corresponding sliding groove 801. When the reciprocating rod 15 rotates, the slider 21 is intermittently reciprocated. When the slider 21 moves, the tail of the welding gun 8 is rotated through the cooperation of the sliding rod 26 and the sliding groove 801. Since the connecting rod 55 is rotatably connected to the head of the welding gun 8, the direction of the head of the welding gun 8 changes when the slider 21 moves.

[0040] In another embodiment of the present invention: a corrugated groove 6 is opened on the support plate 4, and a movable column 7 adapted to the corrugated groove 6 is fixedly arranged at the bottom of the connecting frame 12, and the movable column 7 is slidably arranged in the corrugated groove 6; when the screw 10 rotates, the connecting frame 12 is driven to move through the movable block 11, and when the connecting frame 12 moves, the movable column 7 moves in the corrugated groove 6, and the trajectory of the corrugated groove 6 is the same as the S-side shape of the corrugated steel plate 5. Through the corrugated groove 6, the connecting frame 12 drives the head of the welding gun 8 to move along the groove of the corrugated steel plate 5, so that all the gaps between the corrugated steel plate 5 and the frame are welded.

[0041] Furthermore, a plurality of fourth springs 64 are fixedly arranged between the rotating ring 54 and the outer circumference of the welding gun 8, a first lifting rod 28 is fixedly arranged on the sliding rod 26, a second spring 27 is fixedly arranged between the sliding rod 26 and the inner top wall of the slider 21, a plurality of ratchet teeth 51 are fixedly arranged on the outer circumference of the welding gun 8, a toothed ring 52 is rotatably arranged on the welding gun 8, a pawl 53 adapted to the ratchet teeth 51 is arranged in the toothed ring 52, a toothed plate 56 is fixedly arranged at both ends of the support plate 4, and a top block 57 is fixedly arranged on each toothed plate 56; the length of the screw rod 10 is greater than the length of the corrugated steel plate 5, when the screw rod 10 drives the connecting frame 12 to completely weld the bottom of the corrugated steel plate 5, the screw rod 10 continues to rotate, and the connecting plate 17 continues to move, and as the connecting plate 17 moves, the corresponding toothed plate 56 abuts against the toothed ring 52, at this time the locking block 31 is located between the two locking plates 371 in the middle, and the lifting plate 41 is lifted up by the top block 57, and the sliding rod 2 6 is moved out of the slide groove 801, and the welding gun 8 can be rotated, and then the corresponding tooth plate 56 drives the welding gun 8 to rotate 180° through the tooth ring 52. At this time, the gun head of the welding gun 8 faces upward, and the support plate 4 is moved upward so that the gun head of the welding gun 8 is aligned with the top of the corrugated steel plate 5. At this time, the reverse screw 10 makes the connecting frame 12 move in the opposite direction, so that the welding gun 8 welds the corrugated steel plate 5 and the top of the frame together. As the connecting frame 12 moves to the end of the support plate 4 again, the welding gun 8 turns over 180° again to make the gun head face downward, so as to facilitate the welding of the next carriage. It should be noted that the thread groove pitch at both ends of the screw 10 is larger, and the tooth ring 52 is engaged with the corresponding tooth plate 56 to make the welding gun 8 rotate 180°. After that, the moving ring 16 has not moved to the end of the reciprocating rod 15, and the ratchet 51 and the pawl 53 cooperate to make the welding gun 8 only rotate 180° each time the connecting frame 12 moves to the end of the support plate 4.

[0042] In another embodiment of the present invention: a second lifting rod 29 is fixedly arranged on the sliding rod 26, a fixed block 42 is fixedly arranged on the sliding frame 13, a plug rod 44 is slidably arranged on the fixed block 42, a lifting plate 41 is fixedly arranged on the plug rod 44, a third spring 43 is fixedly arranged between the lifting plate 41 and the fixed block 42, two jacks 45 adapted to the plug rod 44 are opened on the rotating ring 54, and two fourth springs 64 are fixedly arranged between the rotating ring 54 and the outer peripheral surface of the welding gun 8; the two fourth springs 64 are horizontally symmetrically arranged, the lifting plate 41 is on the upper side of the second lifting rod 29, and when the first lifting rod 28 is lifted up by the top block 57, the second lifting rod 28 is lifted up. The rod 29 also rises and lifts the insertion rod 44 through the lifting plate 41, so that the insertion rod 44 is moved out of the corresponding socket 45. At this time, the rotating ring 54 can rotate, and as the tooth plate 56 drives the welding gun 8 to rotate, the rotating ring 54 is also rotated 180 degrees through the connecting rod 55. When the top block 57 is separated from the first lifting rod 28, the sliding rod 26 abuts against the outer peripheral surface of the welding gun 8. As the welding gun 8 rotates 180°, the sliding rod 26 is inserted into the corresponding slide groove 801 again, and the insertion rod 44 is also inserted into the corresponding socket 45. The two fourth springs 64 can prevent the welding gun 8 from tilting when the tooth plate 56 drives the welding gun 8 to rotate.

[0043] In another embodiment of the present invention, a driven rod 14 is rotatably provided on the support plate 4, a reciprocating rod 15 is slidably connected to the driven rod 14, a first sprocket 61 is fixedly provided at both ends of the screw 10, a second sprocket 62 is fixedly provided at both ends of the driven rod 14, a chain 63 meshing with the first sprocket 61 and the second sprocket 62 is provided at both ends of the support plate 4; the chain 63 on the same side meshes with the corresponding first sprocket 61 and the second sprocket 62, a servo motor 3 is fixedly provided on the support plate 4, and the output end of the servo motor 3 is connected to the screw 10 is fixedly connected, and the screw rod 10 is driven to rotate by the servo motor 3, thereby rotating each first sprocket 61. When the first sprocket 61 rotates, the corresponding second sprocket 62 is driven to rotate through the chain 63, thereby rotating the driven rod 14. When the driven rod 14 rotates, it drives the reciprocating rod 15 to rotate. Two hydraulic cylinders 2 are fixedly arranged between the support plate 4 and the base 1. The lifting and lowering of the support plate 4 are controlled by the two hydraulic cylinders 2, so that the head of the welding gun 8 is conveniently moved to a suitable height after the welding gun head 8 is flipped. The groove of the corrugated steel plate 5 is as shown in FIG. Fig.14As shown, in the initial state, the locking block 31 is between the two locking plates 371 in the middle, from top to bottom, and the gun head is oriented as shown in the first orientation. As the screw 10 rotates, when the gun head of the welding gun 8 moves to the first inflection point 501, the moving ring 16 presses down the abutment rod 33 at the end, and the slider 21 quickly moves to between the two locking plates 371 at the end of the rotating rod 32. The gun head of the welding gun 8 quickly changes its orientation through the cooperation of the first spring 24 and the slider 21, and becomes as shown in the second orientation. When the gun head moves to the second inflection point When the gun head reaches point 502, the moving ring 16 presses down the abutting rod 33 in the middle of the rotating rod 32, and then the slider 21 moves to the middle of the rotating rod 32, and the direction of the gun head is as shown in the third direction. When the gun head moves to the third inflection point 503, the moving ring 16 presses down the abutting rod 33 at the other end of the rotating rod 32, and then the direction of the gun head is as shown in the fourth direction. When the gun head moves to the fourth inflection point 504, the moving ring 16 presses down the abutting rod 33 in the middle again, and then the direction of the gun head is as shown in the first direction, so that it can adapt to the S-shaped edge of the corrugated steel plate 5.

[0044] A method for welding a vehicle body is implemented by the above-mentioned vehicle body welding device, comprising the following steps: S1: fixing a corrugated steel plate 5 on a side wall of a frame, adjusting the height of a support plate 4, and aligning the tip of a welding gun 8 with the connection between the bottom of the corrugated steel plate 5 and the frame; S2: rotating a screw rod 10, starting the welding gun 8 to weld the connection between the corrugated steel plate 5 and the bottom of the frame; S3: pausing the rotation of the screw rod 10, closing the welding gun 8, lifting the support plate 4 so that the tip of the welding gun 8 is aligned with the connection between the corrugated steel plate 5 and the top of the frame, and rotating the screw rod 10 again, starting the welding gun 8 to complete the welding; the screw rod 10 is driven to rotate by a servo motor 3, and the height of the support plate 4 is adjusted by two hydraulic cylinders 2. When the bottom of the corrugated steel plate 5 is welded, the corrugated steel plate 5 is moved a certain distance away from the welding gun 8 to provide space for the rotation of the welding gun 8. When the welding gun 8 is flipped and lifted to an appropriate height, the corrugated steel plate 5 and the frame are moved toward the welding gun 8, thereby welding the top of the corrugated steel plate 5.

[0045] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A vehicle body welding device, comprising a base (1), characterized in that: The base (1) is provided with a support plate (4), the support plate (4) is rotatably provided with a screw rod (10), the screw rod (10) is threadedly connected with a moving block (11), a connecting frame (12) is slidably provided on the moving block (11), a reciprocating rod (15) is rotatably provided on the connecting frame (12), a moving ring (16) is slidably provided on the reciprocating rod (15), a slider (21) is provided at the bottom of the moving ring (16), the slider (21) is slidably connected to the connecting frame (12), a welding gun (8) is provided on the connecting frame (12), an anti-rotation mechanism for preventing the end of the welding gun (8) from rotating is provided on the connecting frame (12), the slider (21) is slidably connected to the welding gun (8), and a locking mechanism is rotatably provided on the connecting frame (12); A connecting plate (17) is fixedly provided at the bottom of the moving ring (16); a fixing frame (22) is fixedly provided on a side of the connecting plate (17) away from the slider (21); a moving plate (23) is slidably provided in the fixing frame (22); a first spring (24) is fixedly provided between the moving plate (23) and the connecting plate (17); a pull rope (25) is fixedly provided on a side of the moving plate (23) close to the connecting plate (17); and an end of the pull rope (25) away from the connecting plate (17) is slidably connected to the slider (21); A sliding frame (13) is fixedly arranged on the connecting frame (12), the sliding block (21) is slidably arranged in the sliding frame (13), the locking mechanism comprises a rotating rod (32) rotatably arranged on the top of the sliding frame (13), a plurality of locking frames (37) are rotatably arranged on the rotating rod (32), a locking block (31) is fixedly arranged on the top of the sliding block (21), and three abutting rods (33) are fixedly arranged on the outer peripheral surface of the rotating rod (32); Six fixing plates (35) are fixedly arranged on the sliding frame (13), torsion springs (36) are fixedly arranged one by one between each fixing plate (35) and each locking plate (371), a protrusion (38) is fixedly arranged on one side of each locking plate (371) close to the abutting rod (33), and three unlocking plates (39) are fixedly arranged on the outer peripheral surface of the rotating rod (32); A sliding rod (26) is slidably arranged on the slider (21); two sliding grooves (801) adapted to the sliding rod (26) are provided on the outer peripheral surface of the welding gun (8); the anti-rotation mechanism comprises a rotating ring (54) rotatably arranged on the support plate (4); a connecting rod (55) is fixedly arranged on the top of the rotating ring (54); an end of the connecting rod (55) away from the rotating ring (54) is rotatably connected to the end of the welding gun (8); A corrugated groove (6) is provided on the support plate (4), and a movable column (7) adapted to the corrugated groove (6) is fixedly provided at the bottom of the connecting frame (12), and the movable column (7) is slidably arranged in the corrugated groove (6); A plurality of fourth springs (64) are fixedly arranged between the rotating ring (54) and the outer circumference of the welding gun (8); a first lifting rod (28) is fixedly arranged on the sliding rod (26); a second spring (27) is fixedly arranged between the sliding rod (26) and the inner top wall of the sliding block (21); a plurality of ratchet teeth (51) are fixedly arranged on the outer circumference of the welding gun (8); a toothed ring (52) is rotatably arranged on the welding gun (8); a ratchet pawl (53) adapted to the ratchet teeth (51) is arranged inside the toothed ring (52); a toothed plate (56) is fixedly arranged at both ends of the support plate (4); and a top block (57) is fixedly arranged on each of the toothed plates (56); A second lifting rod (29) is fixedly arranged on the sliding rod (26), a fixed block (42) is fixedly arranged on the sliding frame (13), an insertion rod (44) is slidably arranged on the fixed block (42), a lifting plate (41) is fixedly arranged on the insertion rod (44), a third spring (43) is fixedly arranged between the lifting plate (41) and the fixed block (42), two insertion holes (45) adapted to the insertion rod (44) are opened on the rotating ring (54), and two fourth springs (64) are fixedly arranged between the rotating ring (54) and the outer peripheral surface of the welding gun (8).

2. The vehicle body welding device according to claim 1, characterized in that: A driven rod (14) is rotatably provided on the support plate (4), the reciprocating rod (15) is slidably connected to the driven rod (14), first sprockets (61) are fixedly provided at both ends of the screw rod (10), second sprockets (62) are fixedly provided at both ends of the driven rod (14), and chains (63) meshing with the first sprocket (61) and the second sprocket (62) are provided at both ends of the support plate (4).

3. A method for welding a commercial vehicle body, which is implemented by the commercial vehicle body welding device according to any one of claims 1 to 2, characterized in that: The steps include: S1: Fix the corrugated steel sheet (5) on the side wall of the frame, adjust the height of the support plate (4), and align the tip of the welding gun (8) with the connection between the bottom of the corrugated steel sheet (5) and the frame; S2: rotating the screw rod (10) and starting the welding gun (8) to weld the corrugated steel plate (5) to the bottom of the frame; S3: Pause the rotation of the screw rod (10), turn off the welding gun (8), lift the support plate (4) so ​​that the welding gun (8) is aligned with the connection between the corrugated steel plate (5) and the top of the frame, rotate the screw rod (10) again, start the welding gun (8) and complete the welding.

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