Chassis welding device

Abstract

The present invention discloses a chassis welding device, which relates to the technical field of welding equipment, and includes a frame, a base plate, a chassis clamping mechanism, a welding mechanism, a beam conveying mechanism and a beam clamping mechanism. The base plate is fixedly mounted on the frame, the welding mechanism includes a first linear drive device and a welding robot, the beam conveying mechanism includes a second linear drive device, a first linear drive element, a lifting seat, a second linear drive element, a movable fork frame, and a fixed fork frame, and the beam clamping mechanism includes a drive device and a plurality of clamping components. The beam is conveyed to a preset position by the beam conveying mechanism, and the beam is clamped by the clamping plate of the beam clamping mechanism to realize automatic positioning of the beam, thereby reducing human errors, ensuring the welding quality of the chassis, and improving the production efficiency of the chassis; the beams are loaded simultaneously by the movable fork frame and the fixed fork frame, and multiple beams can be conveyed each time, which can reduce the number of round trips, reduce the time consumption of conveying the beams, and improve the production efficiency of the chassis.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to a chassis welding device. Background Art

[0002] In the manufacturing field of trucks such as flying wing vehicles, since they need to pull heavy loads, their chassis structures have higher strength requirements. One type of chassis with higher strength is composed of front side beams, rear side beams, left side beams, right side beams, cross beams and sub-beams. The front side beams, rear side beams, left side beams and right side beams together form a rectangular frame. Multiple cross beams are provided and distributed along the length of the rectangular frame. Sub-beams are fixed on the front side beams, rear side beams and cross beams. The cross beam is also called a "J" beam, and its cross section is a "J"-shaped structure, which can make the chassis have higher strength.

[0003] At present, when welding the above-mentioned chassis, it is necessary to first place the front beam and the left beam at the preset position of the welding platform, and then manually place all the crossbeams one by one to the preset position and make the crossbeams abut against the left beam, fix the crossbeams on the left beam by spot welding or fix them on the welding platform in a detachable manner, and push the right beam to move so that the left beam and the right beam clamp the crossbeam, and then hoist the subbeam onto the front beam and the crossbeam, and push the rear beam to move so that the front beam and the rear beam clamp the left beam, the right beam and the subbeam, thereby fixing the chassis.

[0004] However, due to the large number of crossbeams in the chassis and the high requirements for placement accuracy, for example, a certain flying wing car has 26 crossbeams, and frequent measurements with a ruler are required during the manual placement process. This operation not only consumes a lot of manpower and time, but is also prone to human errors, resulting in deviations in the placement of the beams, which in turn affects the quality of the entire chassis.

[0005] Secondly, when fixing the crossbeam, whether it is spot welding the crossbeam to the left beam or fixing it to the welding platform in a detachable manner, it takes a lot of time to complete these fixing operations, which seriously affects the production efficiency of the chassis. Summary of the invention

[0006] Based on this, it is necessary to provide a chassis welding device that can realize high-precision automatic laying and fixing of beams in order to solve the above-mentioned technical problems.

[0007] In order to achieve the above-mentioned object, the present invention provides a chassis welding device, comprising: a frame, a bottom plate, a chassis clamping mechanism, a welding mechanism, a beam conveying mechanism and a beam clamping mechanism; the bottom plate is fixedly mounted on the frame; The chassis clamping mechanism comprises a fixed front baffle and a fixed left baffle fixedly mounted on the bottom plate, and a movable rear baffle and a movable right baffle movably arranged on the bottom plate; The welding mechanism comprises a first linear drive device and a welding robot, wherein the first linear drive device is fixedly mounted on a frame, and the welding robot is mounted on the first linear drive device and can be driven by the first linear drive device to move linearly along the length direction of the bottom plate; The beam conveying mechanism comprises a second linear drive device, a first linear drive element, a lifting seat, a second linear drive element, a movable fork frame, and a fixed fork frame, wherein the second linear drive device is located below the base plate, the first linear drive element is mounted on the second linear drive device and can be driven by the second linear drive device to move linearly along the length direction of the base plate, the lifting seat is fixedly connected to the output end of the first linear drive element and can be driven by the first linear drive element to move linearly along the vertical direction, the second linear drive element and the fixed fork frame are both fixedly mounted on the lifting seat, the movable fork frame is mounted on the output end of the second linear drive element and can be driven by the second linear drive element to move linearly along the width direction of the base plate, and the fixed fork frame and the movable fork frame both have a fork portion for carrying a single beam; a first opening for the fork portion to move is provided on the base plate; The beam clamping mechanism includes a driving device and a plurality of clamping components. The clamping components include two clamping plates that can be driven by the driving device to clamp the beam. The two clamping plates can be driven by the driving device to move toward or away from each other. A second opening for the clamping plates to move is provided on the bottom plate, and a second opening extends from the upper end of the clamping plates.

[0008] As a preferred technical solution of the present invention, the crossbeam conveying mechanism also includes a cross plate, a guide sleeve and a guide rod. The cross plate is fixedly mounted on the output end of the second linear drive device, the first linear drive element and the guide sleeve are fixedly mounted on the cross plate, the guide rod is slidably connected to the guide sleeve, and the upper end of the guide rod is fixedly connected to the lifting seat.

[0009] As a preferred technical solution of the present invention, the clamping assembly also includes a double-rotation screw, which is rotatably installed at the lower end of the base plate through a bearing. The double-rotation screw has two external thread sections with opposite thread rotation directions. The two clamping plates are respectively threadedly connected to the two external thread sections. By rotating the double-rotation screw, the two clamping plates can be driven to move toward or away from each other; two adjacent double-rotation screws are connected by a first coupling, and the driving device drives each double-rotation screw to rotate synchronously.

[0010] As a preferred technical solution of the present invention, the welding mechanism further includes a mounting frame, the mounting frame is mounted on the first linear drive device, and the welding robot is mounted on the mounting frame.

[0011] As a preferred technical solution of the present invention, at least two crossbeam clamping mechanisms are provided.

[0012] As a preferred technical solution of the present invention, the clamping plate is slidably connected to the first opening.

[0013] As a preferred technical solution of the present invention, the clamping plate has a protrusion, and the protrusion is located above the bottom plate.

[0014] As a preferred technical solution of the present invention, the fixed fork frame and the movable fork frame each have at least two fork portions, and the top ends of the fork portions are chamfered.

[0015] As a preferred technical solution of the present invention, the chassis clamping mechanism also includes a left and right pushing mechanism for driving the movable right baffle to move along the width direction of the bottom plate, the left and right pushing mechanism includes a first drive motor and at least two first worm gear screw lifts, the two adjacent first worm gear screw lifts are connected by a first transmission shaft, the output end of the first drive motor is connected to the input end of one of the first worm gear screw lifts, and the output end of each first worm gear screw lift is fixedly connected to the movable right baffle.

[0016] As a preferred technical solution of the present invention, the chassis clamping mechanism also includes a front and rear pushing mechanism for driving the movable rear baffle to move along the length direction of the bottom plate, the front and rear pushing mechanism includes a second driving motor and at least two second worm gear screw lifts, the two adjacent second worm gear screw lifts are connected by a second transmission shaft, the output end of the second driving motor is connected to the input end of one of the second worm gear screw lifts, and the output end of each second worm gear screw lift is fixedly connected to the movable rear baffle.

[0017] Compared with the prior art, this technical solution has at least one of the following beneficial effects: 1. The beam is transported to the preset position through the beam conveying mechanism, and the beam is clamped by the clamping plate of the beam clamping mechanism to realize the automatic positioning of the beam, so as to ensure the accuracy of the position of the beam, reduce human errors, ensure the welding quality of the chassis, reduce manpower and time consumption, and improve the production efficiency of the chassis; 2. By setting up a movable fork frame and a fixed fork frame to load the beams at the same time, multiple beams can be transported each time, which can reduce the number of round trips, reduce the time spent on transporting beams, and improve the chassis production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a chassis welding device according to an embodiment of the present invention Figure 1 ; Figure 2 A three-dimensional diagram of a chassis welding device according to an embodiment of the present invention Figure 2 ; Figure 3 A side view of a chassis welding device according to an embodiment; Figure 4 A three-dimensional diagram of a chassis welding device according to an embodiment of the present invention Figure 3 (Chassis installation status); Figure 5A top view of a chassis welding device according to an embodiment (chassis installed state); Figure 6 for Figure 5 Sectional view along line AA; Figure 7 for Figure 6 A partial enlarged view of point B in the middle; Figure 8 Figure 7 Another state diagram (the splint clamps the beam); Fig. 9 It is a partial schematic diagram of the beam conveying mechanism; Fig.10 A partial schematic diagram of a side view of a chassis welding device according to an embodiment Figure 1 (Lifting beam state); Fig.11 A partial schematic diagram of a side view of a chassis welding device according to an embodiment Figure 2 (Beam not lifted); In the figure, 1, frame; 2, bottom plate; 21, first opening; 22, second opening; 3, chassis clamping mechanism; 31, fixed front baffle; 32, fixed left baffle; 33, movable rear baffle; 34, movable right baffle; 35, left and right pushing mechanism; 351, first driving motor; 352, first worm gear screw lift; 353, first transmission shaft; 36, front and back pushing mechanism; 361, second driving motor; 362, second worm gear screw lift; 363, second transmission shaft; 4, welding mechanism; 41, first linear driving device; 42, welding machine Person; 43. Mounting frame; 5. Beam conveying mechanism; 50. Fork; 51. Second linear drive device; 52. First linear drive element; 53. Lifting seat; 54. Second linear drive element; 55. Movable fork frame; 56. Fixed fork frame; 57. Cross plate; 58. Guide sleeve; 59. Guide rod; 6. Beam clamping mechanism; 61. Drive device; 62. Clamping assembly; 621. Clamping plate; 622. Double-rotation screw; 7. Chassis; 71. Front side beam; 72. Rear side beam; 73. Left beam; 74. Right beam; 75. Beam; 76. Subbeam. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0020] See also Figures 1 to 11The embodiment of the present application provides a chassis welding device, including: a frame 1, a bottom plate 2, a chassis clamping mechanism 3, a welding mechanism 4, a beam conveying mechanism 5 and a beam clamping mechanism 6, the chassis clamping mechanism 3 includes a fixed front baffle 31, a fixed left baffle 32, a movable rear baffle 33, and a movable right baffle 34; Among them, see Figures 1 to 3 The bottom plate 2 is fixedly mounted on the frame 1, and the bottom plate 2 is used to carry the chassis 7. The fixed front baffle 31 and the fixed left baffle 32 are both fixedly mounted on the bottom plate 2. The fixed front baffle 31 is fixed to the bottom plate 2 by a front baffle fixing member, and the front baffle fixing member is fixedly connected to the frame 1. The fixed left baffle 32 is fixed to the bottom plate 2 by a left baffle fixing member, and the left baffle fixing member is fixedly connected to the bottom plate 2. The left baffle fixing member is L-shaped, and the left baffle fixing member is fixedly connected to the bottom plate 2 and the fixed left baffle 32 by bolts. The fixed front baffle 31 is located on one side of the length direction of the bottom plate 2, that is, the front end of the bottom plate 2. The fixed The fixed left baffle 32 is located at one side in the width direction of the bottom plate 2, that is, at the left end of the bottom plate 2. The movable rear baffle 33 and the movable right baffle 34 are movably arranged on the bottom plate 2. The movable rear baffle 33 is arranged in parallel with the fixed front baffle 31. The movable rear baffle 33 can move linearly along the length direction of the bottom plate 2. The movable rear baffle 33 is arranged in parallel with the fixed front baffle 31. The movable rear baffle 33 can move linearly along the width direction of the bottom plate 2. The movable right baffle 34, the fixed front baffle 31, the fixed left baffle 32, the movable rear baffle 33, and the movable right baffle 34 together enclose a rectangular area for accommodating the chassis 7. Among them, see Figure 4 and Figure 5 The chassis 7 is composed of a front side beam 71, a rear side beam 72, a left side beam 73, a right side beam 74, a cross beam 75 and a sub-beam 76. The front side beam 71, the rear side beam 72, the left side beam 73 and the right side beam 74 together form a rectangular frame. A plurality of cross beams 75 are provided and distributed along the length direction of the rectangular frame. The sub-beam 76 is fixed on the front side beam 71, the rear side beam 72 and the cross beam 75. See also Figures 1 to 3 The welding mechanism 4 includes a first linear drive device 41 and a welding robot 42. The first linear drive device 41 is fixedly mounted on the frame 1. The welding robot 42 is mounted on the first linear drive device 41 and can be driven by the first linear drive device 41 to move linearly along the length direction of the bottom plate 2. The welding robot 42 welds the chassis 7. See also Figures 1 to 3 ,as well as Figures 9 to 11The beam conveying mechanism 5 includes a second linear drive device 51, a first linear drive element 52, a lifting seat 53, a second linear drive element 54, a movable fork frame 55, and a fixed fork frame 56. The second linear drive device 51 is located below the base plate 2. The first linear drive element 52 is installed on the second linear drive device 51 and can be driven by the second linear drive device 51 to move linearly along the length direction of the base plate 2. The lifting seat 53 is fixedly connected to the output end of the first linear drive element 52 and can be driven by the first linear drive element 52 to move linearly along the vertical direction. The second linear drive element 54 and the fixed fork frame 56 are both fixedly installed on the lifting seat 53. The movable fork frame 55 is installed at the output end of the second linear drive element 54 and can be driven by the second linear drive element 54 to move linearly along the width direction of the base plate 2. The movable fork frame 55 is located below the base plate 2. On the side of the fixed fork frame 56 facing the fixed left baffle 32; the fixed fork frame 56 and the movable fork frame 55 both have a fork portion 50 for carrying a single crossbeam 75. In this embodiment, the fork portions 50 on the fixed fork frame 56 and the movable fork frame 55 are both set to two, which can stably carry the crossbeam 75; a first opening 21 for the fork portion 50 to move is opened on the bottom plate 2, and the first opening 21 is set to two, and the length direction of the first opening 21 is consistent with the length direction of the bottom plate 2; the more the number of fixed fork frames 56 is, the more the total amount of crossbeams 75 that can be transported at one time is. The maximum number of fixed fork frames 56 is limited by the spacing between two adjacent crossbeams 75. Since the crossbeams 75 are not equidistantly distributed, the maximum number of fixed fork frames 56 needs to be determined according to the minimum width of two adjacent crossbeams 75. In this embodiment, the fixed fork frames 56 are set to two; In this embodiment, the first linear drive element 52 is an electric cylinder, and the second linear drive element 54 is an electric slide. In other embodiments, the first linear drive element 52 may be a hydraulic cylinder or a pneumatic cylinder, and the second linear drive element 54 may be a pneumatic slide or a linear motor. In this embodiment, since the length of the welded chassis 7 is nearly 10 meters, in order to realize the long-distance linear movement of the load, a first linear drive device 41 and a second linear drive device 51 are set. The first linear drive device 41 and the second linear drive device 51 are both selected from the ground rail of the prior art, which can be specifically a gear rack transmission type ground rail or a roller guide rail type ground rail. If a gear rack transmission type ground rail is used, it is composed of a track, a slider, a drive motor, a rack, a gear, etc. The slider is slidably mounted on the track, the drive motor is fixedly mounted on the slider, the gear is fixedly mounted on the rotor of the drive motor, the rack is fixedly mounted on the track, the rack is meshed with the gear, and the drive motor drives the gear to rotate, so that the slider, the drive motor and the gear move linearly along the length direction of the track. The drive motor is composed of an AC servo motor and a reducer, which can realize precise linear movement; it can also be selected. In some other embodiments, if the length of the welded chassis 7 is shorter, a ball screw, a linear slide, or other structures that can realize linear motion can also be selected to replace the first linear drive device 41 and the second linear drive device 51; At least two beam clamping mechanisms 6 are provided. In this embodiment, please refer to Figure 1 and Figure 2 , the crossbeam clamping mechanism 6 is provided with two, the crossbeam clamping mechanism 6 comprises a driving device 61 and a plurality of clamping assemblies 62, the clamping assemblies 62 have the same total amount as the crossbeam 75 on the chassis 7, see Figure 7 , Figure 8 , Fig.10 and Fig.11 The clamping assembly 62 includes two clamping plates 621 that can be driven by the driving device 61 to clamp the cross beam 75. The two clamping plates 621 can be driven by the driving device 61 to move toward or away from each other. The bottom plate 2 is provided with a second opening 22 for the clamping plates 621 to move. The second opening 22 extends from the upper end of the clamping plates 621. When the clamping plates 621 move toward each other, they can not only clamp and fix the cross beam 75, but also accurately position the cross beam 75 by clamping the cross beam 75, so that the cross beam 75 is stably located between the two clamping plates 621, ensuring the accuracy of the position of the cross beam 75 before welding. In this embodiment, in order to facilitate the driving of the clamping plates 621 to move toward or away from each other, please refer to Figure 7 , Figure 8 , Fig.10 and Fig.11The clamping assembly 62 also includes a double-rotation screw 622, which has two external thread sections with opposite thread rotation directions. The two clamping plates 621 are respectively threadedly connected with the two external thread sections. The external thread sections are provided with external threads, and the clamping plates 621 are provided with corresponding internal threads. The two adjacent double-rotation screws 622 are connected by a first coupling. The double-rotation screw 622 is rotatably mounted on the lower end of the base plate 2 through a bearing; the driving device 61 is a motor, a pneumatic motor or a hydraulic motor that can realize rotation The rotating driving element, in this embodiment, can be a stepper motor or a servo motor. A mounting seat is fixed on the frame 1, and the driving device 61 is fixedly installed on the mounting seat. The driving device 61 drives each double-rotation screw 622 to rotate synchronously, and the double-rotation screw 622 can drive the two clamps 621 to move toward or away from each other; the clamp 621 is slidably connected to the first opening 21, so that the double-rotation screw drives the clamp 621 to move stably in a straight line, and the clamp 621 will not rotate with the double-rotation screw; In some other embodiments, the driving device 61 can also be set as an electric cylinder, a hydraulic cylinder or a pneumatic cylinder that can realize linear motion, but it is also necessary to set a gear and a rack meshing with the gear. The gear is fixed on the double-rotation screw 622, and the rack is driven to move by the driving device 61, and the rack drives the gear and the double-rotation screw 622 to rotate; in some other embodiments, on the basis of setting the driving device 61 as a pneumatic cylinder, an electric cylinder or a hydraulic cylinder that can realize linear motion, the double-rotation screw 622 may not be set, and the driving device 61 and the splint 621 are set one by one, and the splint 621 is directly driven to move by the driving device 61, but this will require a larger number of driving devices 61, which will increase the production cost of the chassis welding device.

[0021] The welding steps of the chassis welding device of this embodiment are as follows: S1, first place the front side beam 71, the rear side beam 72, and the left side beam 73 on the bottom plate 2, so that the front side beam 71 abuts against the fixed front baffle 31 and the fixed left baffle 32, the left side beam 73 abuts against the fixed front baffle 31, the fixed left baffle 32, and the front side beam 71, and the rear side beam 72 abuts against the fixed front baffle 31 and the movable right baffle 34 and keeps a certain distance from the front side beam 71; S2, a crossbeam 75 is placed on both the movable fork frame 55 and the fixed fork frame 56, such as Fig.10As shown, the left end of the beam 75 is located inside the left beam 73, and the right end of the beam 75 is located inside the right beam 74. The stroke of the second linear drive device 61 is greater than the width of the left beam 73, ensuring that the second linear drive device 61 can drive the beam 75 to move to abut against the inner wall of the left beam 73; the movable fork frame 55 and the fixed fork frame 56 will lift the beam 75, so that the bottom end of the beam 75 is higher than the top of the clamping plate 621, to avoid interference between the beam 75 and the clamping plate 621; the beam 75 on the movable fork frame 55 is recorded as the first beam 75, the beam 75 on a fixed fork frame 56 adjacent to the movable fork frame 55 is recorded as the second beam 75, and the beam 75 on the other fixed fork frame 56 is recorded as the third beam 75. The first beam 75, the second beam 75 and the third beam 75 will be arranged in sequence; S3, then, the crossbeam conveying mechanism 5 works to convey the crossbeam 75. Specifically, the second linear drive device 51 works to move the crossbeam 75 from the rear end to the front end of the bottom plate 2. When the crossbeam 75 on the movable fork frame 55 moves to the frontmost clamping assembly 62, the crossbeam 75 on the movable fork frame 55 is located directly above the gap between the two clamping plates 621 of the clamping assembly 62. S4, the second linear drive element 54 drives the movable fork frame 55 and the cross beam 75 to move leftward, so that the left end of the cross beam 75 abuts against the inner wall of the left beam 73; the stroke of the second linear drive element 54 is greater than the width of the left beam 73, that is, after the left end of the cross beam 75 abuts against the inner wall of the left beam 73, the second linear drive element 54 will still drive the cross beam 75 to move leftward, thereby ensuring that the left end of the cross beam 75 abuts against the inner wall of the left beam 73; then, the first linear drive element 52 drives the lifting seat 53 to descend, so that the movable fork frame 55 and the fixed fork frame 56 are lowered together to a height lower than the upper end of the bottom plate 2, and the cross beam 75 on the movable fork frame 55 falls between the two clamping plates 621 of the frontmost clamping assembly 62, please refer to Figure 7 , the gap between the two clamping plates 621 will be slightly larger than the width of the crossbeam 75 to ensure that the crossbeam 75 can accurately fall between the two clamping plates 621; the crossbeam 75 on the fixed fork frame 56 will be located between the two frontmost clamping components 62; S5, then, the second linear drive element 54 drives the movable fork frame 55 to move rightward, and the second linear drive device 51 drives the movable fork frame 55 and the fixed fork frame 56 to move a distance toward the rear end of the bottom plate 2, so that the movable fork frame 55 moves to the original position of the fixed fork frame 56 adjacent to it, and the first linear drive element 52 drives the lifting seat 53, the movable fork frame 55 and the fixed fork frame 56 to rise, and the movable fork frame 55 lifts the second crossbeam 75, and the fixed fork frame 56 adjacent to the movable fork frame 55 lifts the third crossbeam 75; S6, then, the second linear drive device 51 drives the movable fork frame 55 and the fixed fork frame 56 to move a distance toward the rear end of the base plate 2, so that the crossbeam 75 on the movable fork frame 55 moves to the clamping assembly 62 adjacent to the frontmost clamping assembly 62. At this time, the crossbeam 75 on the movable fork frame 55 is located directly above the gap between the two clamping plates 621 of the clamping assembly 62. S7, repeating the above S4 to S6; S8, repeat the above S4; S9, the second linear drive element 54 drives the movable fork frame 55 to move rightward, and the second linear drive device 51 drives the movable fork frame 55 and the fixed fork frame 56 to move to the rear end of the bottom plate 2, and S2 is repeated until all the beams 75 are arranged; S10, the beam clamping mechanism 6 works to clamp the beam 75. Specifically, the two driving devices 61 work synchronously, and the driving device 61 drives the double-rotation screw 622 to rotate, thereby driving the two clamping plates 621 to move toward each other. Figure 8 As shown, the cross beam 75 is clamped and fixed to achieve accurate positioning of the cross beam 75 and ensure the accuracy of the position of the cross beam 75 before welding; S11, drive the movable right baffle 34 to move, so that the movable right baffle 34 drives the right side beam 74 to move, so that the right side beam 74 abuts against the front side beam 71 and the cross beam 75; place the movable rear side beam 72 on the bottom plate 2, so that the movable rear side beam 72 abuts against the movable rear end plate; place the auxiliary beam 76 on the cross beam 75 and the fixed front side beam 71, drive the movable rear end plate to move, so that the movable rear baffle 33 drives the movable rear side beam 72 to move, so that the movable rear side beam 72 abuts against the fixed left beam 73, the movable right side beam 74, and the auxiliary beam 76; then arrange other parts of the chassis 7 to complete the assembly of the chassis 7 structure; S12 , the welding mechanism 4 works, the first linear drive device 41 drives the welding robot 42 to move along the length direction of the chassis 7 , and the welding robot 42 welds the chassis 7 .

[0022] In a preferred embodiment, in order to facilitate the installation of the first linear drive element 52, the cross beam conveying mechanism 5 further includes a cross plate 57, which is fixedly installed at the output end of the second linear drive device 51, the first linear drive element 52 is fixedly installed on the cross plate 57, the guide rod 59 is slidably connected to the guide sleeve 58, and the upper end of the guide rod 59 is fixedly connected to the lifting seat 53. In order to enable the first linear drive element 52 to drive the lifting seat 53 to rise and fall smoothly, the cross beam conveying mechanism 5 further includes a guide sleeve 58 and a guide rod 59, the guide sleeve 58 is fixedly installed on the cross plate 57, the guide rod 59 is slidably connected to the guide sleeve 58, the upper end of the guide rod 59 is fixedly connected to the lifting seat 53, and the guide sleeve 58 and the guide rod 59 play a guiding role for the lifting seat 53.

[0023] In a preferred embodiment, since the first linear drive device 41 is located on the right side of the chassis 7 and the chassis 7 has a certain width, in order to ensure that the welding robot 42 can weld the position at the left end of the chassis 7, the welding mechanism 4 is provided to further include a mounting frame 43, the mounting frame 43 is mounted on the first linear drive device 41, and the welding robot 42 is mounted on the mounting frame 43. The mounting point of the welding robot 42 on the mounting frame 43 is approximately located directly above the central axis of the chassis 7, so that the working area of ​​the welding robot 42 can cover different areas of the left and right positions of the chassis 7.

[0024] In a preferred embodiment, since the cross section of the cross beam 75 is in the shape of a "F", in order to facilitate clamping the two sides of the cross beam 75, a clamping plate 621 is provided with a raised portion, and the raised portion is located above the bottom plate 2. The raised portions of the two clamping plates 621 are raised in the direction facing each other, which can facilitate clamping the two sides of the cross beam 75 and increase the contact area with the cross beam 75.

[0025] In a preferred embodiment, in order to stably support the cross beam 75, the fixed fork frame 56 and the movable fork frame 55 are provided with two forks 50, and the top of the fork 50 is provided with a chamfer to facilitate the placement of the cross beam 75. The chamfer can make the inlet of the fork 50 have a flared structure, which is convenient for the cross beam 75 to enter.

[0026] In a preferred embodiment, in order to facilitate driving the movable right baffle 34 to move, the chassis clamping mechanism 3 of this embodiment also includes a left and right pushing mechanism 35 for driving the movable right baffle 34 to move along the width direction of the base plate 2. The left and right pushing mechanism 35 includes a first driving motor 351 and at least two first worm gear screw lifts 352. In this embodiment, due to the long length of the base plate 2, the number of first worm gear screw lifts 352 set in this embodiment is six, and the two adjacent first worm gear screw lifts 352 are connected by a first transmission shaft 353. The first worm gear screw lift 352 is connected to the first transmission shaft 353 by a second coupling. The output end of the first driving motor 351 is connected to the input end of one of the first worm gear screw lifts 352 through a third coupling, and the output end of each first worm gear screw lift 352 is fixedly connected to the movable right baffle 34. The first drive motor 351 is a stepper motor or a servo motor. The first drive motor 351 can drive each first worm gear screw lift 352 to move synchronously, driving the movable right baffle 34 to move accurately. The first worm gear screw lift 352 is fixed to the frame 1 through a fixed seat, and the first drive motor 351 is fixedly installed on one of the fixed seats through a motor mounting plate.

[0027] In a preferred embodiment, in order to facilitate driving the movable rear baffle 33 to move, the chassis clamping mechanism 3 of this embodiment also includes a front and rear pushing mechanism 36 for driving the movable rear baffle 33 to move along the length direction of the base plate 2. The front and rear pushing mechanism 36 includes a second driving motor 361 and at least two second worm gear screw lifts 362. In this embodiment, since the width of the base plate 2 is much smaller than its length, the number of second worm gear screw lifts 362 set in this embodiment is two, and the two adjacent second worm gear screw lifts 362 are connected by a second transmission shaft 363. The second worm gear screw lift 362 and the second transmission shaft 363 are connected by a fourth coupling. The output end of the second driving motor 361 is connected to the input end of one of the second worm gear screw lifts 362 through a fifth coupling, and the output end of each second worm gear screw lift 362 is fixedly connected to the movable rear baffle 33. The second drive motor 361 is a stepper motor or a servo motor, and the second drive motor 361 can drive each second worm gear screw lift 362 to move synchronously, driving the movable rear baffle 33 to move accurately. The second worm gear screw lift 362 is fixed to the frame 1 through a fixing seat, and the second drive motor 361 is fixedly installed on one of the fixing seats through a motor mounting plate.

[0028] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0029] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A chassis welding device, comprising: A frame (1) and a base plate (2) fixedly mounted on the frame (1); It is characterized by further comprising: a chassis clamping mechanism (3), a welding mechanism (4), a crossbeam conveying mechanism (5) and a crossbeam clamping mechanism (6); The chassis clamping mechanism (3) comprises a fixed front baffle (31) and a fixed left baffle (32) fixedly mounted on the bottom plate (2), and a movable rear baffle (33) and a movable right baffle (34) movably arranged on the bottom plate (2); The welding mechanism (4) comprises a first linear drive device (41) and a welding robot (42) driven by the first linear drive device (41) to move linearly along the length direction of the base plate (2); The crossbeam conveying mechanism (5) comprises a second linear drive device (51), a first linear drive element (52), a lifting seat (53), a second linear drive element (54), a movable fork frame (55), and a fixed fork frame (56); the first linear drive element (52) is driven by the second linear drive device (51) to move linearly along the length direction of the base plate (2); the lifting seat (53) is driven by the first linear drive element (52) to move linearly along the vertical direction; the second linear drive element (54) and the fixed fork frame (56) are both fixedly mounted on the lifting seat (53); the movable fork frame (55) is driven by the second linear drive element (54) to move linearly along the width direction of the base plate (2); and the fixed fork frame (56) and the movable fork frame (55) both have a fork portion (50) for carrying a single crossbeam (75); The crossbeam clamping mechanism (6) comprises a driving device (61) and a plurality of clamping assemblies (62), wherein the clamping assemblies (62) comprise two clamping plates (621) that can be driven by the driving device (61) to clamp the crossbeam (75).

2. The chassis welding device according to claim 1, characterized in that: The crossbeam conveying mechanism (5) further comprises a cross plate (57), a guide sleeve (58) and a guide rod (59); the cross plate (57) is fixedly mounted on the output end of the second linear drive device (51); the first linear drive element (52) and the guide sleeve (58) are fixedly mounted on the cross plate (57); the guide rod (59) is slidably connected to the guide sleeve (58); and the upper end of the guide rod (59) is fixedly connected to the lifting seat (53).

3. The chassis welding device according to claim 1, characterized in that: The clamping assembly (62) further comprises a double-rotation screw (622), which is rotatably mounted on the lower end of the base plate (2) via a bearing, and has two external threaded sections with opposite thread rotation directions, and two clamping plates (621) are respectively threadedly connected to the two external threaded sections, and the two clamping plates (621) can be driven to move towards or away from each other by rotating the double-rotation screw (622); two adjacent double-rotation screws (622) are connected by a first coupling, and the driving device (61) drives each double-rotation screw (622) to rotate synchronously.

4. The chassis welding device according to claim 1, characterized in that: The welding mechanism (4) further comprises a mounting frame (43), wherein the mounting frame (43) is mounted on the first linear drive device (41), and the welding robot (42) is mounted on the mounting frame (43).

5. The chassis welding device according to claim 1, characterized in that: At least two crossbeam clamping mechanisms (6) are provided.

6. The chassis welding device according to claim 1, characterized in that: The clamping plate (621) is slidably connected to the first opening (21).

7. The chassis welding device according to claim 1, characterized in that: The clamping plate (621) has a protruding portion, and the protruding portion is located above the bottom plate (2).

8. The chassis welding device according to claim 1, characterized in that: The fixed fork frame (56) and the movable fork frame (55) each have at least two fork portions (50), and the top ends of the fork portions (50) are provided with chamfers.

9. The chassis welding device according to claim 1, characterized in that: The chassis clamping mechanism (3) further comprises a left-right pushing mechanism (35) for driving the movable right baffle (34) to move along the width direction of the bottom plate (2); the left-right pushing mechanism (35) comprises a first driving motor (351) and at least two first worm gear screw lifts (352); two adjacent first worm gear screw lifts (352) are connected in transmission via a first transmission shaft (353); an output end of the first driving motor (351) is connected in transmission to an input end of one of the first worm gear screw lifts (352); and an output end of each of the first worm gear screw lifts (352) is fixedly connected to the movable right baffle (34).

10. The chassis welding device according to claim 9, characterized in that: The chassis clamping mechanism (3) further comprises a front-rear pushing mechanism (36) for driving the movable rear baffle (33) to move along the length direction of the bottom plate (2); the front-rear pushing mechanism (36) comprises a second driving motor (361) and at least two second worm gear screw lifts (362); two adjacent second worm gear screw lifts (362) are connected in transmission via a second transmission shaft (363); an output end of the second driving motor (361) is connected in transmission to an input end of one of the second worm gear screw lifts (362); and an output end of each second worm gear screw lift (362) is fixedly connected to the movable rear baffle (33).

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