Intelligent skid frame for vehicle door welding

Abstract

The invention relates to the field of skids, in particular to an intelligent skid frame for car door welding, which comprises a base and further comprises a sliding frame, a lifting mechanism, a rotating mechanism and a positioning mechanism, the lifting mechanism comprises a lifting frame and a rotating assembly, a supporting plate is fixedly arranged on the outer wall of the lifting frame, and the rotating mechanism comprises a rotating table, a rotating shaft and a driving assembly. The positioning mechanism comprises four positioning rods, four longitudinal adjusting assemblies and four transverse adjusting assemblies, the four longitudinal adjusting assemblies are symmetrically arranged at the bottom of the rotary table, each transverse adjusting assembly is arranged at the top of the corresponding longitudinal adjusting assembly, each positioning rod is arranged on the corresponding transverse adjusting assembly, and the positioning rods are arranged on the rotary table. According to the intelligent skid frame for vehicle door welding, the inserting connection requirements of welding positioning holes of vehicle doors of different types and different sizes can be met, then the practicability and the intelligent degree of the skid frame are improved, and different welding requirements are met.

Description

Technical Field

[0001] The present invention relates to the field of skids, and in particular to an intelligent skid frame for welding vehicle doors. Background Art

[0002] Door welding skid frames are mainly used in the field of automobile door welding. As a load-bearing fixture in this field, they play a vital role in door welding.

[0003] The existing door welding skid has the following shortcomings: 1. The spacing of the welding positioning holes on the outer wall of the door of vehicles of different types and sizes varies. The positioning rods on the existing skids are often unable to be adjusted, which cannot meet the positioning requirements of vehicles of different types and sizes, making welding inconvenient.

[0004] 2. Currently, the height of the skid frames used for door welding is mostly relatively low. When loading materials onto the skid frames, workers need to bend over to place the doors on the positioning rods of the frames. Based on the daily processing volume of existing factories, workers need to bend over frequently to load doors hundreds of times a day. In addition, the weight of the doors is relatively large, which causes great harm to the workers' health. Summary of the Invention

[0005] The object of the present invention is to provide an intelligent skid frame for welding vehicle doors.

[0006] To achieve this object, the present invention adopts the following technical solutions: Provided is an intelligent skid frame for door welding, comprising a base; It also includes a sliding frame, a lifting mechanism, a rotating mechanism and a positioning mechanism; The sliding frame is slidably arranged on the top of the base; The lifting mechanism is provided on the sliding frame, and the lifting mechanism includes a lifting frame and a rotating assembly. Four guide rods are symmetrically provided on the top of the sliding frame. A first slider is slidably provided on the outer wall of each guide rod. The lifting frame is fixed between the four first sliders, and the rotating assembly is inserted into the sliding frame. A support plate is fixed on the outer wall of the lifting frame, and a rotating mechanism is provided on the support plate. The rotating mechanism includes a turntable, a rotating shaft and a driving assembly. The rotating shaft is rotatably provided on the top of the support plate. A limit platform is fixed on the top of the lifting frame. The turntable is fixed on the top of the rotating shaft. The rotating shaft is rotatably connected to the limit platform, and the driving assembly is provided between the support plate and the rotating shaft. The positioning mechanism is arranged on the outer wall of the turntable. The positioning mechanism includes four positioning rods, four longitudinal adjustment components and four transverse adjustment components. The four longitudinal adjustment components are symmetrically arranged at the bottom of the turntable. Each transverse adjustment is arranged at the top of a longitudinal adjustment component, and each positioning rod is arranged on a transverse adjustment component.

[0007] Further, each longitudinal adjusting assembly comprises an electric push rod, a push block, a sliding plate and two sliding rods, eight sliding grooves are symmetrically formed in the outer wall of the rotating table, the two sliding rods are slidingly arranged in two of the sliding grooves, the sliding plate and the push block are fixedly arranged at the top and the bottom of the two sliding rods respectively, and the electric push rod is fixedly arranged at the bottom of the rotating table, with its output end fixedly connected with one end of the outer wall of the push block.

[0008] Further, each longitudinal adjusting assembly comprises an electric push rod, a push block, a sliding plate and two sliding rods, eight sliding grooves are symmetrically formed in the outer wall of the rotating table, the two sliding rods are slidingly arranged in two of the sliding grooves, the sliding plate and the push block are fixedly arranged at the top and the bottom of the two sliding rods respectively, and the electric push rod is fixedly arranged at the bottom of the rotating table, with its output end fixedly connected with one end of the outer wall of the push block.

[0009] Further, the outer wall of the positioning rod is fixedly provided with a sliding sheet, the outer wall of the sliding sheet is fixedly provided with a handle, the outer wall of the sliding sheet is slidingly provided with a sliding rod, the two ends of the sliding rod are fixedly provided with a pull block and a wedge-shaped buckle respectively, the pull block is slidingly connected with the sliding sheet through a guide rod, the outer wall of the sliding rod is sleeved with a pressing spring, and the wedge-shaped buckle and the sliding sheet are in abutment with the two ends of the pressing spring respectively.

[0010] Further, the rotating assembly comprises a stepping motor, a synchronous belt, two first lead screws and three synchronous wheels, the stepping motor is fixedly arranged at the bottom of the sliding frame, the two first lead screws are rotatably arranged on the sliding frame, the three synchronous wheels are fixedly arranged at the output end of the stepping motor and the bottom end of the two first lead screws respectively, and the synchronous belt is sleeved between the three synchronous wheels.

[0011] Further, the outer wall of the lifting frame is fixedly provided with a lifting block at two ends, each lifting block is threadedly connected with a first lead screw, the top of the sliding frame is symmetrically provided with two L-shaped plates, and the end of each first lead screw away from the synchronous wheel is rotatably connected with the top of one L-shaped plate.

[0012] Further, the driving assembly comprises a DC motor, a worm and a worm wheel, the top of the supporting plate is symmetrically provided with two limiting plates, the worm is rotatably arranged between the two limiting plates, the DC motor is inserted on one of the limiting plates, with its output end fixedly connected with one end of the worm, the worm wheel is fixedly arranged on the rotating shaft, and the worm wheel is in meshing connection with the worm.

[0013] Furthermore, two vertical plates are fixed on the top of the base, a servo motor is inserted into the outer wall of one of the vertical plates, a second screw rod is rotatably arranged between the two vertical plates, the output end of the servo motor is fixedly connected to one end of the second screw rod, and a second slider is fixed to the bottom of the sliding frame through four connecting rods, and the second slider is threadedly connected to the second screw rod.

[0014] Furthermore, four pulleys are symmetrically provided at both ends of the sliding frame, and two guide rails are symmetrically provided on the top of the base, and every two pulleys located on the same side are slidably connected to one guide rail.

[0015] Furthermore, an avoidance gap is provided at one end of the sliding frame close to the servo motor.

[0016] Beneficial effects of the present invention: 1. The present invention designs a positioning mechanism, namely four positioning rods, four longitudinal adjustment assemblies, and four lateral adjustment assemblies. Through the four longitudinal adjustment assemblies and four lateral adjustment assemblies, the position of each positioning rod can be individually adjusted, so that the four positioning rods can adapt to the insertion requirements of welding positioning holes of vehicle doors of different types and sizes, thereby improving the practicality and intelligence of the skid frame and meeting different welding requirements.

[0017] 2. The present invention designs a lifting mechanism, namely a lifting frame and a rotating assembly. The rotating assembly can drive the lifting frame to slide vertically, so that the lifting frame and the four positioning rods on the top of the lifting frame can be vertically raised to a suitable height, making it convenient for workers to directly place the car door between the four positioning rods. Workers do not need to frequently bend over to load the car door, which greatly reduces the labor intensity of workers and is beneficial to protecting their health.

[0018] 3. The present invention designs a slide, a handle, a sliding rod, a pull block, a wedge-shaped buckle, a tightening spring, a locking plate and a wedge-shaped slot. Through the cooperation of the above structures, the extension distance of each positioning rod inside a sleeve can be adjusted to meet the plug-in requirements of the welding positioning holes of car doors of different thicknesses, thereby improving the flexibility of the skid frame. The sliding plate can be locked by the locking plate, thereby locking the positioning rod, ensuring the plug-in effect of the positioning rod to the car door positioning hole after adjustment, thereby preventing the car door from shaking or even falling off during welding, which is beneficial to improving welding efficiency.

[0019] 4. The present invention designs a servo motor, a second screw rod, a second slider, a pulley and a guide rail. Through the cooperation of the above structures, the four positioning rods and the car doors placed on the positioning rods can be driven by the sliding frame to slide horizontally on the assembly line after welding is completed so as to be transported to the next processing step. There is no need to manually transport the car doors, which saves labor costs, reduces transportation time, and improves the transportation efficiency of the car doors.

[0020] 5. The present invention designs a rotating mechanism, namely a turntable, a rotating shaft and a driving assembly. After the car door is loaded, the points on the car door are welded one by one through the welding equipment. When the welding of a part of the car door is completed, the driving assembly is started by the controller, thereby driving the turntable and the car door on top to rotate a certain angle, so that the next point on the car door can be welded quickly and conveniently without manually moving the car door. This greatly reduces the time spent on adjusting the car door during the welding process, thereby helping to improve the welding efficiency of the car door. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings in the embodiments of the present invention.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 for Figure 1 A magnified view of point A in the figure; Figure 3 for Figure 1 Enlarged view of point B in FIG. Figure 4 Schematic diagram of the cross-sectional structure of the lifting frame and the sliding frame of the present invention Figure 1 ; Figure 5 for Figure 4 Enlarged view of point C in the figure; Figure 6 for Figure 4 The enlarged view of point D in the figure; Figure 7 Schematic diagram of the three-dimensional structure of the turntable and positioning mechanism of the present invention; Figure 8 for Figure 7 Enlarged view of point E in the figure; Figure 9 for Figure 7 The enlarged view of point F in the figure; Figure 10 Schematic diagram of the bottom structure of the turntable of the present invention; Figure 11 Schematic diagram of the cross-sectional structure of the lifting frame and the sliding frame of the present invention Figure 2 ; Figure 12 for Figure 11 The enlarged view of G in the figure; In the figure: sliding frame 10, lifting frame 11, guide rod 12, first slider 13, turntable 14, rotating shaft 15, limit platform 16, positioning rod 17, electric push rod 18, push block 19, slide plate 20, slide bar 21, slide column 22, slide rail 23, micro motor 24, turntable 25, connecting rod 26, guide block 27, sleeve 28, slide 29, handle 30, slide rod 31, pull block 32, wedge-shaped buckle 33, tightening spring 34, locking plate 35, wedge-shaped slot 36, stepping motor 37, synchronous belt 38, first screw rod 39, synchronous wheel 40, lifting block 41, DC motor 42, worm 43, worm gear 44, servo motor 45, second screw rod 46, second slider 47, pulley 48, guide rail 49, avoidance gap 50. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams rather than actual drawings, and should not be construed as limiting the present invention. In order to better illustrate the embodiments of the present invention, certain components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the dimensions of actual products.

[0025] Reference Figures 1 to 12 As shown, the present invention provides an intelligent skid frame for door welding, comprising a base; It also includes a sliding frame 10, a lifting mechanism, a rotating mechanism and a positioning mechanism; The sliding frame 10 is slidably arranged on the top of the base; The lifting mechanism is provided on the sliding frame 10, and the lifting mechanism includes a lifting frame 11 and a rotating assembly. Four guide rods 12 are symmetrically provided on the top of the sliding frame 10. A first slider 13 is slidably provided on the outer wall of each guide rod 12. The lifting frame 11 is fixed between the four first sliders 13, and the rotating assembly is inserted into the sliding frame 10. A support plate is fixed on the outer wall of the lifting frame 11, and a rotating mechanism is provided on the support plate. The rotating mechanism includes a turntable 14, a rotating shaft 15 and a driving assembly. The rotating shaft 15 is rotatably provided on the top of the support plate. A limit platform 16 is fixed on the top of the lifting frame 11. The turntable 14 is fixed on the top of the rotating shaft 15. The rotating shaft 15 is rotatably connected to the limit platform 16, and the driving assembly is provided between the support plate and the rotating shaft 15. The positioning mechanism is arranged on the outer wall of the turntable 14. The positioning mechanism includes four positioning rods 17, four longitudinal adjustment components and four transverse adjustment components. The four longitudinal adjustment components are symmetrically arranged at the bottom of the turntable 14, each transverse adjustment is arranged at the top of a longitudinal adjustment component, and each positioning rod 17 is arranged on a transverse adjustment component.

[0026] Reference Figures 1 to 12As shown, each longitudinal adjustment component includes an electric push rod 18, a push block 19, a slide plate 20 and two slide bars 21. Eight slide grooves are symmetrically opened on the outer wall of the turntable 14. The two slide bars 21 are slidably arranged inside two of the slide grooves. The slide plate 20 and the push block 19 are fixedly arranged at the top and bottom of the two slide bars 21 respectively. The electric push rod 18 is fixedly arranged at the bottom of the turntable 14, and its output end is fixedly connected to the outer wall of one end of the push block 19. There are differences in the spacing of the positioning holes of car doors of different sizes and types. When the spacing between the two longitudinal positioning holes of the car door changes, the electric push rod 18 is started by the controller, so that its output end is extended or retracted. Since its output end is fixedly connected to the two slide bars 21 through the push block 19, and since the two slide bars 21 are fixedly connected to the slide plate 20, the positioning rod 17 is designed on the slide plate 20 through the slide column 22, and then the slide column 22 drives the positioning rod 17 to slide longitudinally until the insertion requirements of the two longitudinal positioning holes of the car door are met.

[0027] Reference Figures 1 to 12 As shown, each lateral adjustment component includes a slide post 22, a slide rail 23, a micro motor 24, a turntable 25, a connecting rod 26, a guide block 27 and a sleeve 28. The slide rail 23 is fixed to the top of the slide plate 20, the slide post 22 is slidably arranged on the top of the slide rail 23, the micro motor 24 is fixed to the top of the slide plate 20, the turntable 25 is fixed on its output end, the guide block 27 is fixed to the bottom of the slide post 22, the connecting rod 26 is hinged between the guide block 27 and the turntable 25, and a guide groove for the horizontal sliding of the guide block 27 is provided on the outer wall of one end of the slide rail 23. The sleeve 28 is fixed to the top of the slide post 22, and the center of the sleeve 28 is provided with an avoidance hole for the lifting and lowering of the positioning rod 17. The spacing between the positioning holes of car doors of different sizes and types is different. When the spacing between the two lateral positioning holes of the car door occurs When the change occurs, the micro motor 24 is started by the controller, so that its output end drives the turntable 25 to rotate. Since the turntable 25 and the guide block 27 are respectively hinged to the two ends of the connecting rod 26, the bottom of the slide column 22 is slidably connected to the slide rail 23, the guide block 27 is fixedly connected to the bottom outer wall of the slide column 22, and the sleeve 28 is fixedly connected to the top of the slide column 22. The positioning rod 17 is inserted on the sleeve 28, and then the positioning rod 17 is driven by the slide column 22 to slide horizontally until the insertion requirements of the two horizontal positioning holes of the car door are met. Through the cooperation of the longitudinal adjustment component, the four-point positioning of the car door is realized, which is convenient for subsequent welding, so that the device can adaptably adjust the positioning points of the four insertion rods on the outer wall of the car door according to the specific type and size of the car door to be welded, thereby improving the practicality and intelligence of the frame.

[0028] Reference Figures 1 to 12As shown, a slide 29 is fixed on the outer wall of the positioning rod 17, a handle 30 is fixed on the outer wall of the slide 29, a slide rod 31 is slidably provided on the outer wall of the slide 29, a pull block 32 and a wedge-shaped buckle 33 are fixed at both ends of the slide rod 31, the pull block 32 is slidably connected to the slide 29 through a guide rod, a tightening spring 34 is sleeved on the outer wall of the slide rod 31, the wedge-shaped buckle 33 and the slide 29 respectively contact the two ends of the tightening spring 34, and a locking plate 35 is fixed on the top of each slide column 22. The outer wall of the sleeve 28 is provided with a plurality of wedge-shaped slots 36 for the wedge-shaped buckles 33 to engage with. The wedge-shaped buckle 33 is engaged with one of the wedge-shaped slots 36. The thickness of doors of different sizes and types varies, resulting in a certain difference in the depth of the door positioning hole. When encountering a door positioning hole with a larger depth, the handle 30 is manually grasped and pulled upward, thereby driving the slide 29 to slide vertically along the axial direction of the sleeve 28 through the handle 30. The outer wall of the sleeve 28 is provided with an avoidance groove for the slide 29 to slide. The wedge-shaped buckle 33 is installed on the outer wall of the slide 29 through the sliding rod 31. The wedge-shaped buckle 33 is narrow at the top and wide at the bottom. Therefore, when the wedge-shaped buckle 33 slides vertically upward along the slide 29, the inclined surface of the wedge-shaped buckle 33 is resisted by the locking plate 35, causing the holding spring 34 to change from the initial state to the tightened state, thereby driving the wedge-shaped buckle 33 to disengage from the inside of the wedge-shaped slot 36 through the sliding rod 31. When the positioning rod 17 slides up inside the sleeve 28 to the insertion depth of the positioning hole required for welding the car door, the worker releases the The slide bar 31 is opened, and the pressing spring 34 is changed from a taut state to an initial state, and then the wedge-shaped buckle 33 is pushed into the corresponding wedge-shaped slot 36 through the slide bar 31, and the slide 29 is locked through the locking plate 35, and the positioning rod 17 is further locked, ensuring the positioning effect of the positioning rod 17 after adjustment, preventing the car door from shaking or even falling off during welding, which is beneficial to improving welding efficiency. At the same time, it can meet the positioning requirements of this frame for car doors of different types and sizes, and improve the flexibility of this frame.

[0029] Reference Figures 1 to 12As shown, the rotating assembly includes a stepper motor 37, a synchronous belt 38, two first screw rods 39 and three synchronous wheels 40. The stepper motor 37 is fixed at the bottom of the sliding frame 10. The two first screw rods 39 are rotatably arranged on the sliding frame 10. The three synchronous wheels 40 are respectively fixed at the output end of the stepper motor 37 and the bottom ends of the two first screw rods 39. The synchronous belt 38 is sleeved between the three synchronous wheels 40. At present, the height of the skid frame for door welding is mostly low. When loading the material onto the skid frame, the worker needs to bend down to put the door on the positioning rod 17 of the frame. According to the daily processing volume of the existing factory, hundreds of doors need to be welded in a day, which means that the worker Workers need to bend over frequently to load car doors hundreds of times every day, and the car doors are heavy, which is extremely harmful to their health. Therefore, a lifting mechanism is designed. The frame is equipped with a controller, and all electrical equipment on the frame is electrically connected to the controller. When it is necessary to load car doors onto the frame, the stepper motor 37 is started by the controller, so that its output end drives one of the synchronous wheels 40 to rotate. Since the output end of the stepper motor 37 and the bottom ends of the two first screw rods 39 are respectively fixedly connected to the three synchronous wheels 40, the three synchronous wheels 40 are connected by a synchronous belt 38, and the two first screw rods 39 are both rotated and arranged at the top of the sliding frame 10, thereby driving the two screw rods to rotate synchronously.

[0030] Reference Figures 1 to 12 As shown, lifting blocks 41 are fixedly provided on the outer walls of both ends of the lifting frame 11, and each lifting block 41 is threadedly connected to a first screw rod 39. Two L-shaped plates are symmetrically provided on the top of the sliding frame 10, and one end of each first screw rod 39 away from the synchronous wheel 40 is rotatably connected to the top of an L-shaped plate. When the two screw rods rotate synchronously, since each lifting block 41 is threadedly connected to a first screw rod 39, the top of the sliding frame 10 is fixedly connected to the bottom of the two L-shaped plates, and one end of each first screw rod 39 away from the synchronous wheel 40 is rotatably connected to the top of an L-shaped plate. The lifting frame 11 is slidably connected to the sliding frame 10 through four first sliders 13 and four guide rods 12, so that the lifting frame 11 and the four positioning rods 17 on its top are vertically raised to a suitable height, which is convenient for workers to directly place the car door between the four positioning rods 17, and workers do not need to frequently bend over to load the car door, which greatly reduces the labor intensity of workers and is beneficial to protecting the health of workers.

[0031] Reference Figures 1 to 12As shown, the driving assembly includes a DC motor 42, a worm 43 and a worm gear 44. Two limit plates are symmetrically provided on the top of the support plate. The worm 43 rotates between the two limit plates. The DC motor 42 is inserted into one of the limit plates, and its output end is fixedly connected to one end of the worm 43. The worm gear 44 is fixedly provided on the rotating shaft 15. The worm gear 44 is meshed with the worm 43. When the car door is loaded, the car door points are welded one by one by welding equipment. When a part of the car door points is welded, the DC motor 42 is started by the controller, so that its output end drives the worm 43 to rotate. Since the output end of the DC motor 42 is fixedly connected to one end of the worm 43, the worm gear 44 is fixedly connected to the rotating shaft 15, and the top of the rotating shaft 15 is fixedly connected to the turntable 14, the worm gear 44 is meshed with the worm 43, thereby driving the turntable 14 and the car door on its top to rotate a certain angle, which is convenient for welding the next point of the car door.

[0032] Reference Figures 1 to 12 As shown, two vertical plates are fixed on the top of the base, and a servo motor 45 is inserted into the outer wall of one of the vertical plates. A second screw rod 46 is rotatably provided between the two vertical plates, and the output end of the servo motor 45 is fixedly connected to one end of the second screw rod 46. The bottom of the sliding frame 10 is fixedly provided with a second slider 47 through four connecting rods, and the second slider 47 is threadedly connected to the second screw rod 46. When all points of the car door are welded, the servo motor 45 is started by the controller. Since the second screw rod 46 is rotatably connected to the two vertical plates, the output end of the servo motor 45 is fixedly connected to one end of the second screw rod 46, and the bottom of the sliding frame 10 is fixedly connected to the second slider 47 through four connecting rods, and the second slider 47 is threadedly connected to the second screw rod 46, so that the sliding frame 10 drives the welded car door to slide on the assembly line for transportation to the next processing step. There is no need for manual transportation, which saves labor costs, reduces transportation time, and improves the transportation efficiency of the car door.

[0033] Reference Figures 1 to 12 As shown, four pulleys 48 are symmetrically provided at both ends of the sliding frame 10, and two guide rails 49 are symmetrically provided on the top of the base. Every two pulleys 48 located on the same side are slidably connected to one guide rail 49. When the second screw rod 46 and the second slider 47 drive the sliding frame 10 to slide horizontally on the top of the base, the four pulleys 48 slide on the top of the two guide rails 49 respectively, guiding the sliding frame 10 to ensure that the sliding frame 10 slides along a straight line to prevent the sliding track from tilting. At the same time, it can support the sliding frame 10 to prevent the second screw rod 46 from insufficiently supporting and limiting the sliding frame 10.

[0034] Reference Figures 1 to 12As shown, an avoidance gap 50 is provided at one end of the sliding frame 10 close to the servo motor 45. The design of the avoidance gap 50 is mainly to avoid the second screw rod 46 when the sliding frame 10 slides horizontally on the top of the base, thereby preventing the sliding frame 10 from conflicting with the second screw rod 46 during the sliding process, thereby improving the operating stability of the sliding frame 10.

[0035] Working principle of the present invention: At present, the height of the skid frame used for welding car doors is mostly low. When loading materials onto the skid frame, workers need to bend down to place the car door on the positioning rod 17 of the frame. According to the daily processing volume of the existing factory, hundreds of car doors need to be welded a day, which means that workers need to bend down frequently to load car doors hundreds of times a day. In addition, the weight of the car doors is large, which is extremely harmful to the workers' health. Therefore, a lifting mechanism is designed. This frame is equipped with a controller, and all electrical equipment on the frame are electrically connected to the controller. When it is necessary to load the car door onto this frame, the stepper motor 37 is started by the controller, so that its output end drives one of the synchronous wheels 40 to rotate. Since the output end of the stepper motor 37 and the bottom ends of the two first screw rods 39 are respectively fixedly connected to the three synchronous wheels 40, the three synchronous wheels 40 are connected through the synchronous belt 38, and the two first screw rods 39 are both rotated and arranged at the top of the sliding frame 10, thereby driving the two screw rods to rotate synchronously.

[0036] When the two screw rods rotate synchronously, since each lifting block 41 is threadedly connected to a first screw rod 39, the top of the sliding frame 10 is fixedly connected to the bottom of the two L-shaped plates, and each first screw rod 39 is rotatably connected to the top of an L-shaped plate at one end away from the synchronous wheel 40. The lifting frame 11 is slidingly connected to the sliding frame 10 through four first sliders 13 and four guide rods 12, so that the lifting frame 11 and the four positioning rods 17 on its top are vertically raised to a suitable height, which is convenient for workers to directly place the car door between the four positioning rods 17. Workers do not need to frequently bend over to load the car door, which greatly reduces the labor intensity of workers and is beneficial to protecting their health.

[0037] After the car door is loaded, the car door points are welded one by one through welding equipment. When the welding of a part of the car door points is completed, the DC motor 42 is started by the controller, so that its output end drives the worm 43 to rotate. Since the output end of the DC motor 42 is fixedly connected to one end of the worm 43, the worm gear 44 is fixedly connected to the rotating shaft 15, and the top of the rotating shaft 15 is fixedly connected to the turntable 14, the worm gear 44 is meshed with the worm 43, thereby driving the turntable 14 and the car door on its top to rotate a certain angle, which is convenient for welding the next point of the car door.

[0038] When all points of the car door are welded, the servo motor 45 is started through the controller. Since the second screw rod 46 is rotatably connected to the two vertical plates, the output end of the servo motor 45 is fixedly connected to one end of the second screw rod 46. The bottom of the sliding frame 10 is fixedly connected to the second slider 47 through four connecting rods. The second slider 47 is threadedly connected to the second screw rod 46, so that the sliding frame 10 drives the welded car door to slide on the assembly line for transportation to the next processing step. There is no need for manual transportation, which saves labor costs, reduces transportation time, and improves the transportation efficiency of the car door.

[0039] When the second screw rod 46 and the second slider 47 drive the sliding frame 10 to slide horizontally on the top of the base, the four pulleys 48 slide on the top of the two guide rails 49 respectively, guiding the sliding frame 10 to ensure that the sliding frame 10 slides along a straight line and prevents the sliding track from tilting. At the same time, it can provide support for the sliding frame 10 to prevent the second screw rod 46 from providing insufficient support and limiting force on the sliding frame 10.

[0040] The design of the avoidance notch 50 is mainly to avoid the second screw rod 46 when the sliding frame 10 slides horizontally on the top of the base, thereby preventing the sliding frame 10 from conflicting with the second screw rod 46 during the sliding process, thereby improving the operating stability of the sliding frame 10.

[0041] The thickness of doors of different sizes and types varies, resulting in a certain difference in the depth of the door positioning holes. When encountering a door positioning hole with a larger depth, the handle 30 is manually grasped and pulled upward, thereby driving the slide 29 to slide vertically upward along the axis of the sleeve 28 through the handle 30. An avoidance groove for the slide 29 to slide is provided on the outer wall of the sleeve 28. Since the wedge-shaped clip 33 is installed on the outer wall of the slide 29 through the slide rod 31, the wedge-shaped clip 33 is narrow at the top and wide at the bottom, so that when the wedge-shaped clip 33 slides vertically upward with the slide 29, the inclined surface of the wedge-shaped clip 33 is resisted by the locking plate 35, causing the holding spring 34 to change from the initial state to the tightened state, thereby driving the slide rod 31 to The wedge-shaped clip 33 disengages from the inside of the wedge-shaped slot 36. When the positioning rod 17 slides up inside the sleeve 28 to the insertion depth of the positioning hole required for welding the car door, the worker releases the slide rod 31, and the pressing spring 34 changes from a tight state to an initial state, and then pushes the wedge-shaped clip 33 into the corresponding wedge slot 36 through the slide rod 31, and locks the slide 29 through the locking plate 35, and further locks the positioning rod 17, ensuring the positioning effect of the positioning rod 17 after adjustment, preventing the car door from shaking or even falling off during welding, which is beneficial to improving welding efficiency. At the same time, it can meet the positioning requirements of this frame for car doors of different types and sizes, thereby improving the flexibility of this frame.

[0042] There are differences in the spacing between the positioning holes of car doors of different sizes and types. When the spacing between the two longitudinal positioning holes of the car door changes, the electric push rod 18 is activated by the controller to extend or retract its output end. Since its output end is fixedly connected to the two slide bars 21 through the push block 19, and since the two slide bars 21 are fixedly connected to the slide plate 20, the positioning rod 17 is designed on the slide plate 20 through the slide column 22, and then the positioning rod 17 is driven to slide longitudinally through the slide column 22 to meet the plug-in requirements of the two longitudinal positioning holes of the car door.

[0043] The spacing between the positioning holes of car doors of different sizes and types is different. When the spacing between the two horizontal positioning holes of the car door changes, the micro motor 24 is started by the controller, so that its output end drives the turntable 25 to rotate. Since the turntable 25 and the guide block 27 are respectively hinged to the two ends of the connecting rod 26, the bottom of the slide post 22 is slidably connected to the slide rail 23, the guide block 27 is fixedly connected to the bottom outer wall of the slide post 22, and the sleeve 28 is fixedly connected to the top of the slide post 22. The positioning rod 17 is inserted on the sleeve 28, and then the positioning rod 17 is driven by the slide post 22 to slide horizontally until the insertion requirements of the two horizontal positioning holes of the car door are met. Through the cooperation of the longitudinal adjustment component, the four-point positioning of the car door is realized, which is convenient for subsequent welding. The device can adjust the positioning points of the four insertion rods on the outer wall of the car door according to the specific type and size of the car door to be welded, thereby improving the practicality and intelligence of the frame.

Claims

1. An intelligent skid frame for door welding, comprising a base, characterized in that: It also includes a sliding frame (10), a lifting mechanism, a rotating mechanism and a positioning mechanism; The sliding frame (10) is slidably arranged on the top of the base; The lifting mechanism is provided on the sliding frame (10), and the lifting mechanism includes a lifting frame (11) and a rotating assembly. Four guide rods (12) are symmetrically provided on the top of the sliding frame (10), and a first sliding block (13) is slidably provided on the outer wall of each guide rod (12). The lifting frame (11) is fixedly provided between the four first sliding blocks (13), and the rotating assembly is inserted into the sliding frame (10); A support plate is fixedly provided on the outer wall of the lifting frame (11), a rotating mechanism is provided on the supporting plate, the rotating mechanism comprises a turntable (14), a rotating shaft (15) and a driving assembly, the rotating shaft (15) is rotatably provided on the top of the supporting plate, a limiting platform (16) is fixedly provided on the top of the lifting frame (11), the turntable (14) is fixedly provided on the top of the rotating shaft (15), the rotating shaft (15) is rotatably connected to the limiting platform (16), and the driving assembly is provided between the supporting plate and the rotating shaft (15); The positioning mechanism is arranged on the outer wall of the turntable (14), and the positioning mechanism includes four positioning rods (17), four longitudinal adjustment components and four transverse adjustment components. The four longitudinal adjustment components are symmetrically arranged at the bottom of the turntable (14), each transverse adjustment is arranged on the top of a longitudinal adjustment component, and each positioning rod (17) is arranged on a transverse adjustment component.

2. The intelligent skid frame for door welding according to claim 1, characterized in that: Each longitudinal adjustment assembly includes an electric push rod (18), a push block (19), a slide plate (20) and two slide bars (21). Eight slide grooves are symmetrically opened on the outer wall of the turntable (14). The two slide bars (21) are slidably arranged inside two of the slide grooves. The slide plate (20) and the push block (19) are fixedly arranged at the top and bottom of the two slide bars (21) respectively. The electric push rod (18) is fixedly arranged at the bottom of the turntable (14), and its output end is fixedly connected to the outer wall of one end of the push block (19).

3. The intelligent skid frame for door welding according to claim 2, characterized in that: Each lateral adjustment assembly includes a slide post (22), a slide rail (23), a micro motor (24), a turntable (25), a connecting rod (26), a guide block (27) and a sleeve (28). The slide rail (23) is fixed on the top of the slide plate (20), the slide post (22) is slidably arranged on the top of the slide rail (23), the micro motor (24) is fixed on the top of the slide plate (20), the turntable (25) is fixed on its output end, the guide block (27) is fixed on the bottom of the slide post (22), the connecting rod (26) is hingedly arranged between the guide block (27) and the turntable (25), a guide groove for the guide block (27) to slide horizontally is provided on the outer wall of one end of the slide rail (23), the sleeve (28) is fixed on the top of the slide post (22), and the center of the sleeve (28) is provided with an avoidance hole for the positioning rod (17) to rise and fall.

4. The intelligent skid frame for door welding according to claim 3, characterized in that: A slide (29) is fixed on the outer wall of the positioning rod (17), a handle (30) is fixed on the outer wall of the slide (29), a slide rod (31) is slidably provided on the outer wall of the slide (29), a pull block (32) and a wedge-shaped buckle (33) are fixed at both ends of the slide rod (31), the pull block (32) is slidably connected to the slide (29) through a guide rod, a tightening spring (34) is sleeved on the outer wall of the slide rod (31), the wedge-shaped buckle (33) and the slide (29) respectively abut against the two ends of the tightening spring (34), a locking plate (35) is fixed on the top of each slide column (22), a plurality of wedge-shaped slots (36) for the wedge-shaped buckle (33) to be engaged are opened at equal intervals on the outer wall of the locking plate (35), and the wedge-shaped buckle (33) is engaged with one of the wedge-shaped slots (36).

5. The intelligent skid frame for door welding according to claim 4, characterized in that: The rotating assembly includes a stepping motor (37), a synchronous belt (38), two first screw rods (39) and three synchronous wheels (40). The stepping motor (37) is fixed at the bottom of the sliding frame (10). The two first screw rods (39) are both rotatably arranged on the sliding frame (10). The three synchronous wheels (40) are respectively fixed at the output end of the stepping motor (37) and the bottom ends of the two first screw rods (39). The synchronous belt (38) is sleeved between the three synchronous wheels (40).

6. The intelligent skid frame for door welding according to claim 5, characterized in that: Lifting blocks (41) are fixedly provided on the outer walls of both ends of the lifting frame (11), and each lifting block (41) is threadedly connected to a first screw rod (39). Two L-shaped plates are symmetrically provided on the top of the sliding frame (10), and one end of each first screw rod (39) away from the synchronous wheel (40) is rotatably connected to the top of an L-shaped plate.

7. The intelligent skid frame for door welding according to claim 6, characterized in that: The driving assembly includes a DC motor (42), a worm (43) and a worm wheel (44). Two limit plates are symmetrically arranged on the top of the support plate. The worm (43) rotates between the two limit plates. The DC motor (42) is inserted into one of the limit plates, and its output end is fixedly connected to one end of the worm (43). The worm wheel (44) is fixedly arranged on the rotating shaft (15), and the worm wheel (44) is meshed with the worm (43).

8. The intelligent skid frame for door welding according to claim 7, characterized in that: Two vertical plates are fixedly provided on the top of the base, a servo motor (45) is inserted into the outer wall of one of the vertical plates, a second screw rod (46) is rotatably provided between the two vertical plates, an output end of the servo motor (45) is fixedly connected to one end of the second screw rod (46), a second slider (47) is fixedly provided on the bottom of the sliding frame (10) through four connecting rods, and the second slider (47) is threadedly connected to the second screw rod (46).

9. The intelligent skid frame for door welding according to claim 8, characterized in that: Four pulleys (48) are symmetrically provided at both ends of the sliding frame (10), and two guide rails (49) are symmetrically provided on the top of the base, and every two pulleys (48) located on the same side are slidably connected to one guide rail (49).

10. The intelligent skid frame for door welding according to claim 9, characterized in that: An avoidance notch (50) is provided at one end of the sliding frame (10) close to the servo motor (45).

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