Frame welding device of all-terrain vehicle

Abstract

The invention relates to the field of welding devices, in particular to a frame welding device for an all-terrain vehicle. The device comprises a base, a clamping mechanism, a feeding and discharging robot and a welding robot. The multiple sets of clamping mechanisms are arranged on the base in the transverse direction and the longitudinal direction correspondingly, and each clamping mechanism comprises a supporting mechanism, a guide cylinder, a sliding column, a supporting table arranged at the top end of the sliding column, an L-shaped push rod connected to the bottom of the supporting table, a support arranged on the guide cylinder and a limiting frame rotationally arranged on the support, and the limiting frame is provided with a movable channel allowing the push rod to penetrate through. When the supporting table moves downwards to make contact with the top end of the guide cylinder, the end, located below the supporting table, of the limiting frame is pressed downwards by the push rod, the outer end of the limiting frame is overturned upwards to the position above the supporting table, and a clamping space is formed between the outer end of the limiting frame and the supporting table. According to the welding device, the cross beams and the longitudinal beams of the frame can be automatically clamped during feeding, clamping is automatically relieved during discharging after welding is completed, the clamping mechanism does not need to be controlled by an electronic device, and the cost of the whole welding device is relatively low.

Description

Technical Field

[0001] The invention relates to the field of welding devices, in particular to a frame welding device for an all-terrain vehicle. Background Art

[0002] All-terrain vehicles are vehicles that can travel on any terrain and can move freely on terrain where ordinary vehicles are difficult to maneuver. The frame of an all-terrain vehicle needs to ensure a high load-bearing capacity and structural reliability. The frame is welded from multiple crossbeams and longitudinal beams.

[0003] Chinese patent announcement number CN217702104U discloses a two-wheeled electric vehicle frame assembly welding device, including a mounting platform, and a tube body fixing device, a flat fork mounting plate fixing device, a bottom bracket mounting bracket fixing device, a battery box rear support bar fixing device, and a battery box front support bar fixing device fixedly arranged on the mounting platform. This two-wheeled electric vehicle frame assembly welding device can enable an automatic welding robot to complete the welding operation at one time without the need for re-clamping and positioning in the middle, which not only improves the welding efficiency of the frame assembly, but also ensures that each component of the frame assembly is welded in the correct position.

[0004] However, the above technical solution has the following disadvantages: a large number of cylinders are used in the welding device to compress the pipe body as the workpiece. The number of cylinders is large and the cost is high. Electronic devices are also required to control the cylinders, and the cost of the entire welding device is high. Summary of the invention

[0005] The purpose of the present invention is to address the problems existing in the background technology and to propose a frame welding device for an all-terrain vehicle, which can automatically clamp the crossbeams and longitudinal beams of the frame when loading materials, and automatically release the clamping when unloading after welding. The clamping mechanism does not require electronic device control, and the cost of the entire welding device is relatively low.

[0006] The technical solution of the present invention is a frame welding device for an all-terrain vehicle, comprising a base, a clamping mechanism, a loading and unloading robot and a welding robot; the clamping mechanism is arranged in multiple groups on the base along the horizontal and vertical directions, respectively, including a supporting mechanism, a guide cylinder vertically arranged on the supporting mechanism, a sliding column slidably arranged on the guide cylinder, a bracket arranged at the top of the sliding column, an "L"-shaped push rod connected to the bottom of the bracket, a bracket arranged on the guide cylinder and a limit frame rotatably arranged on the bracket, the limit frame has a movable channel for the push rod to pass through, and the top of the bracket has a placement groove, when the bracket moves down to contact with the top of the guide cylinder, the end of the limit frame located below the bracket is pressed down by the push rod, and the outer The end is flipped upward to above the support platform, and a clamping space is formed between the outer end of the limit frame and the support platform. The center of gravity of the limit frame is transferred from the side opposite to the push rod to the same side as the push rod with the central axis of rotation of the limit frame as the boundary; multiple groups of loading and unloading robots are arranged, and when loading, the crossbeam or longitudinal beam of the frame is placed on the support platform and pressed down, and the outer end of the limit frame is driven to flip upward by the push rod, and the limit frame presses the crossbeam or longitudinal beam on the support platform. When unloading, the welded frame is lifted and transferred, and the limit frame is pushed away when lifted, and the limit frame uses the lever principle to push the support platform and keep it at the initial height; multiple groups of welding robots are arranged, which are used to weld the crossbeams and longitudinal beams clamped on the multiple clamping mechanisms into a frame.

[0007] Preferably, the limiting frame includes a first connecting plate portion, a second connecting plate portion and a third connecting plate portion which are integrally connected, the movable channel is located on the first connecting plate portion, and when the limiting frame presses the crossbeam or the longitudinal beam onto the support platform, the third connecting plate portion is in a horizontal state and presses on the crossbeam or the longitudinal beam.

[0008] Preferably, a counterweight is connected to the outer end of the third connecting plate portion, and when the third connecting plate portion is in a horizontal state, the bottom height of the counterweight is greater than or equal to the bottom height of the third connecting plate portion.

[0009] Preferably, a limiting cylinder is provided on the bracket, and a snap plate is provided on the second connecting plate portion. Both the limiting cylinder and the snap plate are arc-shaped structures distributed around the central axis of rotation of the limiting frame. The snap plate has two elastically deformable snap parts at one end away from the second connecting plate portion, and the bottom end of the limiting cylinder has two snap grooves for the two snap parts to be respectively inserted into.

[0010] Preferably, the first connecting plate portion is a "V"-shaped plate, and the movable channel is "V"-shaped.

[0011] Preferably, when the support platform contacts the top end of the guide cylinder, the push rod slides to the outer end of the movable channel, and when the support platform moves up to the initial height, the push rod slides to the inner end of the movable channel.

[0012] Preferably, the supporting mechanism includes an azimuth adjustment component for adjusting the horizontal azimuth of the support platform, a lifting component for adjusting the height of the azimuth adjustment component, and a horizontal position adjustment component arranged on the base and used to adjust the horizontal position of the lifting component. The azimuth adjustment component includes a mounting seat, a turntable rotatably arranged on the mounting seat, and a threaded knob threadedly connected to the mounting seat and capable of tightening against the circumferential surface of the turntable. The guide cylinder is arranged on the top of the turntable, the circumferential surface of the turntable has scale lines, and the top of the mounting seat has a pointer indicating on the scale lines.

[0013] Preferably, the lifting assembly includes a lifting column vertically arranged at the bottom of the mounting seat, a moving cylinder for the lifting column to slide vertically, a base arranged at the bottom end of the moving cylinder, a first screw rod rotatably arranged on the base and threadedly connected to the lifting column, and a first crank connected to the bottom end of the first screw rod, and the first screw rod is distributed vertically.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: the present invention can load the cross beams and longitudinal beams of the frame by a loading and unloading robot, and automatically clamp the cross beams and longitudinal beams of the frame by a clamping mechanism. During clamping, the limit frame uses its own gravity to press the cross beams or longitudinal beams onto the support table. The clamped cross beams and longitudinal beams are welded into a frame by a welding robot. When the frame is unloaded by the loading and unloading robot, the frame moves up and pushes the limit frame to reverse, the limit frame detaches from the frame, and the clamping mechanism automatically releases the clamping of the frame. The clamping mechanism does not need to be controlled by electronic devices, and the cost of the entire welding device is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the embodiment of the present invention when the frame cross beam and the longitudinal beam are not clamped; Figure 2 This is a schematic diagram of the structure after the frame cross beam and longitudinal beam are clamped according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of a clamping mechanism for clamping a frame crossbeam and a longitudinal beam; Figure 4 for Figure 3 A partial structural cross-sectional view; Figure 5 for Figure 4 A magnified view of the structure at center A; Figure 6 It is a partial structural sectional view of the clamping mechanism; Figure 7 is a schematic diagram of the structure of the push rod; Figure 8 It is a structural schematic diagram of the limit frame.

[0016] Figure numerals: 1. base; 2. loading and unloading robot; 3. welding robot; 4. guide cylinder; 5. sliding column; 6. support platform; 7. push rod; 8. bracket; 9. limit frame; 901. movable channel; 91. first connecting plate part; 92. second connecting plate part; 93. third connecting plate part; 10. counterweight block; 11. limit cylinder; 12. snap plate; 13. turntable; 131. scale line; 14. mounting seat; 141. pointer; 15. threaded knob; 16. lifting column; 17. moving cylinder; 18. base; 19. first screw rod; 20. first crank handle; 21. support frame; 22. second screw rod; 23. second crank handle; 24. mounting plate; 25. roller; 26. guide rail. DETAILED DESCRIPTION

[0017] Embodiment 1, as Figure 1-Figure 8 As shown, a frame welding device for an all-terrain vehicle proposed in this embodiment includes a base 1, a clamping mechanism, a loading and unloading robot 2 and a welding robot 3.

[0018] like Figure 1 and Figure 2 As shown, multiple groups of clamping mechanisms are arranged on the base 1 in the horizontal and longitudinal directions, respectively, wherein the multiple groups of clamping mechanisms arranged in the horizontal direction are used to clamp the longitudinal beams of the frame, and the multiple groups of clamping mechanisms arranged in the longitudinal direction are used to clamp the crossbeams of the frame. The crossbeams and longitudinal beams clamped in this embodiment are both rectangular tubular structures. When the length of the crossbeam or the longitudinal beam is long, multiple groups of clamping mechanisms are used to clamp at different positions. When the length of the crossbeam or the longitudinal beam is short, multiple groups or one group of clamping mechanisms can be used for clamping, wherein when one group of clamping mechanisms is used for clamping, the assembled clamping mechanism is set at a position where it can be clamped to the center of gravity of the crossbeam or the longitudinal beam.

[0019] like Figure 3-Figure 8As shown, the clamping mechanism includes a support mechanism, a guide cylinder 4 vertically arranged on the support mechanism, a sliding column 5 slidably arranged on the guide cylinder 4, a support platform 6 arranged at the top of the sliding column 5, an "L"-shaped push rod 7 connected to the bottom of the support platform 6, a bracket 8 arranged on the guide cylinder 4, and a limit frame 9 rotatably arranged on the bracket 8. The limit frame 9 has a movable channel 901 for the push rod 7 to pass through. The push rod 7 includes a vertical rod part and a cross rod part connected to the bottom end of the vertical rod part, and the cross rod part can slide at the movable channel 901. When the push rod 7 moves downward, it can push the limit frame 9 to rotate, and when the limit frame 9 is reversed, it can push the push rod 7 to move upward. The top of the support platform 6 has a placement groove for placing a crossbeam or a longitudinal beam. When the support platform 6 moves downward to contact the top of the guide cylinder 4, the end of the limit frame 9 located below the support platform 6 is pressed down by the push rod 7, and the outer end of the limit frame 9 flips upward to the top of the support platform 6, and a clamping space is formed between the outer end of the limit frame 9 and the support platform 6 for clamping the crossbeam and longitudinal beam of the frame. At this time, with the rotation center axis of the limit frame 9 as the boundary, the center of gravity of the limit frame 9 is transferred from the side opposite to the push rod 7 to the same side as the push rod 7. The limit frame 9 is heavy and can use its own gravity to press the cross beam or longitudinal beam into the placement groove of the support platform 6, ensuring that multiple cross beams and longitudinal beams are in a stable clamping state.

[0020] Multiple groups of loading and unloading robots 2 are provided. When loading, the loading and unloading robots 2 place the crossbeam or longitudinal beam of the frame on the support platform 6 and press it down. The crossbeam or longitudinal beam is specifically placed in the placement groove of the support platform 6. The support platform 6 pushes down the inner end of the limit frame 9 through the push rod 7, thereby driving the outer end of the limit frame 9 to flip upward. The limit frame 9 presses the crossbeam or longitudinal beam on the support platform 6 to prevent the crossbeam and longitudinal beam from shaking, ensuring the stability during subsequent welding, and then ensuring the welding quality. When unloading, the loading and unloading robots 2 lift and transfer the welded frame. When lifting, the frame moves up and pushes the limit frame 9 away. The limit frame 9 reverses and uses the lever principle to push the push rod 7 up. The push rod 7 pushes the support platform 6 up. The center of gravity of the limit frame 9 is transferred to the side opposite to the push rod 7. When the support platform 6 moves up to the initial height, it can remain at the initial height.

[0021] like Figure 2 As shown, a plurality of welding robots 3 are provided to weld the cross beams and longitudinal beams clamped on the plurality of clamping mechanisms into a vehicle frame.

[0022] This embodiment can load the cross beams and longitudinal beams of the frame through the loading and unloading robot 2, and automatically clamp the cross beams and longitudinal beams of the frame using the clamping mechanism. During clamping, the loading and unloading robot 2 presses down on the frame to move the support platform 6 downward, and the push rod 7 moves downward and pushes the limit frame 9 to rotate. The limit frame 9 uses its own gravity to press the cross beam or longitudinal beam onto the support platform 6. For the clamped cross beams and longitudinal beams, the welding robot 3 is used to weld the clamped cross beams and longitudinal beams into a frame. When the welded frame is unloaded by the loading and unloading robot 2, the frame moves up and pushes the limit frame 9 to reverse, and the limit frame 9 is separated from the frame, and the clamping mechanism automatically releases the clamping of the frame. Then, the loading and unloading robot 2 transfers the welded frame out. The clamping mechanism does not need to be controlled by electronic devices, and the cost of the entire welding device is relatively low.

[0023] Embodiment 2, as Figure 1-Figure 8 As shown, the present embodiment proposes a frame welding device for an all-terrain vehicle. Compared with the first embodiment, in the present embodiment, the limiting frame 9 includes a first connecting plate portion 91, a second connecting plate portion 92 and a third connecting plate portion 93 that are integrally connected, and the movable channel 901 is located on the first connecting plate portion 91. When the limiting frame 9 presses the crossbeam or the longitudinal beam onto the support platform 6, the third connecting plate portion 93 is in a horizontal state and presses on the crossbeam or the longitudinal beam. At this time, the bottom surface of the support platform 6 contacts the top end of the guide cylinder 4, and the clamping mechanism is in a state of clamping the crossbeam or the longitudinal beam.

[0024] In order to further improve the reliability of using gravity to compress the cross beam or longitudinal beam, a counterweight 10 is connected to the outer end of the third connecting plate portion 93. When the third connecting plate portion 93 is in a horizontal state, the bottom height of the counterweight 10 is greater than or equal to the bottom height of the third connecting plate portion 93. When the frame is lifted for unloading, the process of the frame pushing the third connecting plate portion 93 away will not be interfered by the counterweight 10, and the frame will not be stuck by the counterweight 10.

[0025] like Figure 6 and Figure 8 As shown, on the basis of using the limiting frame 9 to press the cross beam or longitudinal beam, an additional structure can be added to improve the clamping reliability. Specifically, a limiting cylinder 11 is provided on the bracket 8, and a snap plate 12 is provided on the second connecting plate portion 92. The limiting cylinder 11 and the snap plate 12 are both arc structures distributed around the central axis of rotation of the limiting frame 9. The snap plate 12 has two snap parts that can be elastically deformed at one end away from the second connecting plate portion 92, and the bottom end of the limiting cylinder 11 has two card slots for the two snap parts to be respectively inserted. The two snap parts of the snap plate 12 are distributed at intervals, and both have a triangular convex strip part that bulges outward. When the snap plate 12 extends into the inner side of the limiting cylinder 11, the two snap parts are deformed inwardly, and finally are stuck in the card slot of the limiting cylinder 11 through the triangular convex strip part. When the limiting frame 9 is reversed and the compression of the cross beam and the longitudinal beam is released, the triangular convex strip part can be moved out of the card slot, and the snap part is moved out of the inner side of the limiting cylinder 11.

[0026] When the outer end of the limit frame 9 is flipped upward and pressed against the cross beam or the longitudinal beam through the third connecting plate portion 93, the snap plate 12 rotates with the second connecting plate portion 92, and the two snap portions of the snap plate 12 extend into the inner side of the limit tube 11 and are finally stuck in the two slots at the bottom end of the limit tube 11, which plays a certain limiting role on the limit frame 9 and ensures that the limit frame 9 is stably pressed against the cross beam or the longitudinal beam.

[0027] The first connecting plate portion 91 is a "V"-shaped plate, and the movable channel 901 is "V"-shaped, which has the same direction as the "V" shape of the first connecting plate portion 91. When the support platform 6 contacts the top end of the guide cylinder 4, the push rod 7 slides to the outer end of the movable channel 901. When the support platform 6 moves up to the initial height, the push rod 7 slides to the inner end of the movable channel 901. The movable channel 901 is "V"-shaped. In the process of the push rod 7 sliding from the inner end to the outer end of the movable channel 901, the limit frame 9 is first pushed to rotate at a slower speed to prevent the limit frame 9 from rotating too quickly to the downward movement path of the crossbeam or longitudinal beam and interfering with the downward movement process. The push rod 7 then pushes the limit frame 9 to rotate at a faster speed, which can press the limit frame 9 against the crossbeam or longitudinal beam that has moved to the bottom of the third connecting plate portion 93.

[0028] In this embodiment, the "V"-shaped active channel 901 can avoid interference between structures during the loading process. In addition, by adding a counterweight 10 to improve the reliability of the limit frame 9 when pressing the crossbeam or longitudinal beam, the limit cylinder 11 and the buckle plate 12 can also be added to improve the clamping reliability, ensuring that the welding robot 3 can perform high-quality welding processing on the contact between the crossbeam and the longitudinal beam, thereby ensuring the final welding quality of the all-terrain vehicle frame.

[0029] Embodiment three, as Figure 1-Figure 8 As shown, the present embodiment proposes a frame welding device for an all-terrain vehicle. Compared with the first embodiment, in the present embodiment, the support mechanism includes an azimuth adjustment component for adjusting the horizontal azimuth of the support platform 6, a lifting component for adjusting the height of the azimuth adjustment component, and a horizontal position adjustment component for adjusting the horizontal position of the lifting component. The azimuth adjustment component includes a mounting seat 14, a turntable 13 rotatably arranged on the mounting seat 14, and a threaded knob 15 threadedly connected to the mounting seat 14 and capable of being tightened on the circumferential surface of the turntable 13. When adjusting the azimuth of the support platform 6, the threaded knob 15 is loosened; after determining the azimuth of the support platform 6, the threaded knob 15 is tightened on the circumferential surface of the turntable 13. The guide cylinder 4 is arranged on the top of the turntable 13, the circumferential surface of the turntable 13 has scale lines 131, and the top of the mounting seat 14 has a pointer 141 indicating on the scale lines 131. The turntable 13 is driven to rotate by rotating the guide cylinder 4, and the adjustment direction is observed by using the pointer 141 to indicate the scale on the scale line 131, and the support platform 6 is adjusted to the required direction, so that the support platform 6 can use the placement groove to regularly support the frame cross beams and longitudinal beams. Even if the cross beams and longitudinal beams are broken line beams, they can be clamped by the clamping mechanism.

[0030] like Figure 4 As shown, the lifting assembly includes a lifting column 16 vertically arranged at the bottom of the mounting seat 14, a moving cylinder 17 for the lifting column 16 to slide vertically, a bottom platform 18 arranged at the bottom end of the moving cylinder 17, a first screw rod 19 rotatably arranged on the bottom platform 18 and threadedly connected to the lifting column 16, and a first crank 20 connected to the bottom end of the first screw rod 19, and the first screw rod 19 is vertically distributed. The first screw rod 19 can be driven to rotate by rotating the first crank 20, and the first screw rod 19 drives the lifting column 16 to rise and fall, and the lifting column 16 drives the mounting seat 14 to rise and fall, thereby adjusting the height of the azimuth adjustment assembly, and then adjusting the height of the support platform 6 and the limit frame 9, so as to clamp beams or longitudinal beams of different heights through the clamping mechanism.

[0031] like Figure 1 and Figure 4 As shown, the horizontal position adjustment assembly includes a support frame 21 arranged on the base 1, a second screw rod 22 rotatably arranged on the support frame 21 and threadedly connected to the base 18, a second crank 23 connected to the end of the second screw rod 22, and a guide assembly for guiding the horizontal movement of the moving cylinder 17. The second screw rod 22 can be driven to rotate by rotating the second crank 23, and the second screw rod 22 drives the base 18 to move. The guide assembly guides the moving cylinder 17 horizontally, so that the lifting assembly can move in the horizontal direction, thereby adjusting the horizontal position of the lifting assembly, and then adjusting the horizontal position of the support 6 and the limit frame 9. For the guide assembly, two groups of guide assemblies are horizontally symmetrically arranged, including a mounting plate 24 arranged on the side of the moving cylinder 17, two rows of rollers 25 distributed up and down, and two guide rails 26 distributed up and down relatively, and the rollers 25 are arranged on the mounting plate 24. The guide rail 26 is horizontally arranged on the support frame 21, and has a rolling groove for the roller 25 to move, and the two rolling grooves are relatively distributed. The two rows of rollers 25 roll on the bottom of the upper rolling groove and the lower rolling groove respectively to guide the moving cylinder 17 to move horizontally.

[0032] This embodiment can adjust the orientation, height and horizontal position of the support platform 6 and the limiting frame 9, so as to be suitable for the clamping and welding of vehicle frames of different specifications, and effectively expands the application scope of the vehicle frame welding device.

[0033] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A frame welding device for an all-terrain vehicle, characterized in that: include: Base (1); The clamping mechanism is provided on a base (1) in multiple groups along the horizontal and vertical directions, including a support mechanism, a guide cylinder (4) vertically arranged on the support mechanism, a sliding column (5) slidably arranged on the guide cylinder (4), a support platform (6) arranged on the top of the sliding column (5), an "L"-shaped push rod (7) connected to the bottom of the support platform (6), a bracket (8) arranged on the guide cylinder (4) and a limit frame (9) rotatably arranged on the bracket (8), wherein the limit frame (9) has a movable portion for the push rod (7) to pass through. The movable channel (901) has a placement groove on the top of the support platform (6). When the support platform (6) moves down to contact the top of the guide cylinder (4), the end of the limit frame (9) located below the support platform (6) is pressed down by the push rod (7), and the outer end of the limit frame (9) is turned upward to the top of the support platform (6). A clamping space is formed between the outer end of the limit frame (9) and the support platform (6). The center of gravity of the limit frame (9) is transferred from the side opposite to the push rod (7) to the same side as the push rod (7) with the rotation center axis of the limit frame (9) as the boundary. The loading and unloading robot (2) is provided with multiple groups. When loading, the cross beam or longitudinal beam of the frame is placed on the support platform (6) and pressed down. The outer end of the limit frame (9) is driven to flip upward by the push rod (7). The limit frame (9) presses the cross beam or longitudinal beam on the support platform (6). When unloading, the welded frame is lifted and transferred. When lifting, the limit frame (9) is pushed away. The limit frame (9) uses the lever principle to push the support platform (6) upward and keep it at the initial height. A welding robot (3) is provided in multiple groups and is used to weld the crossbeams and longitudinal beams clamped on the multiple groups of clamping mechanisms into a vehicle frame.

2. The frame welding device of an all-terrain vehicle according to claim 1, characterized in that: The limiting frame (9) comprises a first connecting plate portion (91), a second connecting plate portion (92), and a third connecting plate portion (93) which are integrally connected, the movable channel (901) being located on the first connecting plate portion (91), and when the limiting frame (9) presses the cross beam or the longitudinal beam onto the support platform (6), the third connecting plate portion (93) is in a horizontal state and presses onto the cross beam or the longitudinal beam.

3. The frame welding device of an all-terrain vehicle according to claim 2, characterized in that: The outer end of the third connecting plate portion (93) is connected to a counterweight block (10); when the third connecting plate portion (93) is in a horizontal state, the bottom surface height of the counterweight block (10) is greater than or equal to the bottom surface height of the third connecting plate portion (93).

4. The frame welding device of an all-terrain vehicle according to claim 2, characterized in that: A limiting cylinder (11) is provided on the bracket (8), and a snap plate (12) is provided on the second connecting plate portion (92). Both the limiting cylinder (11) and the snap plate (12) are arc-shaped structures distributed around the central axis of rotation of the limiting frame (9). The snap plate (12) has two elastically deformable snap portions at one end away from the second connecting plate portion (92), and the bottom end of the limiting cylinder (11) has two snap grooves for the two snap portions to be snapped into respectively.

5. The frame welding device for an all-terrain vehicle according to claim 2, characterized in that: The first connecting plate portion (91) is a "V"-shaped plate, and the movable channel (901) is in a "V" shape.

6. The frame welding device for an all-terrain vehicle according to claim 5, characterized in that: When the support platform (6) contacts the top end of the guide cylinder (4), the push rod (7) slides to the outer end of the movable channel (901); when the support platform (6) moves up to the initial height, the push rod (7) slides to the inner end of the movable channel (901).

7. The frame welding device for an all-terrain vehicle according to claim 1, characterized in that: The support mechanism comprises an azimuth adjustment component for adjusting the horizontal azimuth of the support platform (6), a lifting component for adjusting the height of the azimuth adjustment component, and a horizontal position adjustment component arranged on the base (1) and used to adjust the horizontal position of the lifting component. The azimuth adjustment component comprises a mounting seat (14), a turntable (13) rotatably arranged on the mounting seat (14), and a threaded knob (15) threadedly connected to the mounting seat (14) and capable of being pressed against the circumferential surface of the turntable (13). The guide cylinder (4) is arranged on the top of the turntable (13), the circumferential surface of the turntable (13) has scale lines (131), and the top of the mounting seat (14) has a pointer (141) indicating on the scale lines (131).

8. The frame welding device for an all-terrain vehicle according to claim 7, characterized in that: The lifting assembly comprises a lifting column (16) vertically arranged at the bottom of a mounting seat (14), a moving cylinder (17) for the lifting column (16) to slide vertically, a base (18) arranged at the bottom end of the moving cylinder (17), a first screw rod (19) rotatably arranged on the base (18) and threadedly connected to the lifting column (16), and a first crank (20) connected to the bottom end of the first screw rod (19), wherein the first screw rod (19) is vertically distributed.

Images