Welding equipment and welding method for lightweight large-diameter agricultural machinery transmission shaft assembly

Abstract

The application discloses a welding device and method for a light-weight large-diameter agricultural machine transmission shaft assembly and relates to the technical field of agricultural machine transmission shaft welding. The welding device for the light-weight large-diameter agricultural machine transmission shaft assembly comprises a transmission shaft assembly and a welding unit for welding the transmission shaft assembly. The transmission shaft assembly is externally provided with a turnover assembly for driving the transmission shaft assembly. The support assembly comprises a support seat abutting below the transmission shaft assembly for supporting the transmission shaft assembly, a fixed plate fixed on the support seat for supporting the transmission shaft assembly, and a movable fixed plate slidingly arranged in the support seat and the fixed plate for fixing the transmission shaft assembly. In the welding process, the shaft pipe and the shaft sleeve in the transmission shaft assembly can be kept in a relatively static and synchronous rotating state along the support plate, so that the welding personnel do not need to move along the welding point with a welding gun, the welding seam is uniform and smooth, and the welding quality is improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery drive shaft welding technology, specifically to welding equipment and welding methods for lightweight large-diameter agricultural machinery drive shaft assemblies. Background Technology

[0002] Agricultural machinery is commonly used for soil cultivation. It is driven by a drive shaft to rotate at high speed in the field. Traditional agricultural machinery drive shafts are too bulky. Lightweight design can effectively reduce the weight of the drive shaft assembly, thereby reducing the overall weight of the machine, reducing energy consumption, and improving the fuel efficiency of agricultural machinery. This has led to the development of lightweight large-diameter agricultural machinery drive shafts. Currently, in the process of processing lightweight large-diameter agricultural machinery drive shafts, the bushing and shaft tube need to be welded together. In order to ensure the quality of the weld, the bushing and shaft tube need to be kept relatively stationary during the welding operation, and the welding gun or drive shaft assembly needs to rotate. The existing fixing method makes it inconvenient to allow the welding gun or drive shaft assembly to rotate after fixing the drive shaft assembly. As a result, during the welding operation, it is necessary to weld halfway, loosen the fixing of the drive shaft assembly, flip it over and fix it again before welding. This operation is relatively troublesome and it is not easy to control the quality of the weld.

[0003] For example, the welding equipment for the production and processing of automotive drive shafts disclosed in CN212420144U has the problem that after the drive shaft assembly is fixed, it is inconvenient to rotate the welding gun or the drive shaft assembly, making the operation more troublesome and the weld quality difficult to control.

[0004] Therefore, a welding equipment and welding method for lightweight large-diameter agricultural machinery drive shaft assembly are proposed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides welding equipment and methods for lightweight large-diameter agricultural machinery drive shaft assemblies. It solves the problem that existing fixing methods make it inconvenient to allow the welding gun or drive shaft assembly to rotate circumferentially after fixing the drive shaft assembly. This results in the need to weld halfway through the process, loosen the fixing of the drive shaft assembly, flip it over, and then weld again, which is cumbersome and makes it difficult to control the weld quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding device and method for a lightweight large-diameter agricultural machinery drive shaft assembly, comprising a drive shaft assembly, a welding unit for welding the drive shaft assembly, and a control console for controlling the welding process. The drive shaft assembly is externally provided with a support assembly for fixing the drive shaft assembly and a tilting assembly for driving the drive shaft assembly. The support assembly includes:

[0007] The support base is placed against the bottom of the drive shaft assembly to support the drive shaft assembly;

[0008] A fixed plate is fixed on the support base to support the drive shaft assembly;

[0009] A movable fixing plate is slidably installed inside the support base and the fixed fixing plate to fix the drive shaft assembly. A guide rod is fixed on the movable fixing plate, and the guide rod is slidably adapted to the support base and the fixed fixing plate.

[0010] The flipping component includes:

[0011] The support rod, fixed to the support base, is used to provide support force to the support base;

[0012] A power motor is fixed to the support rod via a motor housing to provide power to the tilting assembly. A power shaft is fixed to the power motor and passes through the support rod. A circumferential gear is fixed to one end of the power shaft.

[0013] Preferably, the circumferential gear has meshing circumferential teeth, a circular support plate is fixed on the circumferential teeth, a cover is provided on the circumferential teeth, one end of the cover is fixed to the support plate, and a mounting rod for providing support force is fixed to the bottom of the support plate.

[0014] Preferably, a circular groove is provided on the side wall of the support plate, and a sliding rod is fixed to one end of the support rod, with one end of the sliding rod slidably placed in the circular groove.

[0015] Preferably, a fixed expansion airbag is fixed inside the fixed plate, a fixed compression plate is fixed on the fixed expansion airbag, a fixed protrusion is fixed on the fixed compression plate, and an electromagnet is fixed on the fixed plate.

[0016] Preferably, a movable expansion airbag is fixed in the movable fixed plate, a movable compression plate is fixed on the movable expansion airbag, a movable protrusion is fixed on the movable compression plate, and a magnet is fixed at one end of the movable fixed plate.

[0017] Preferably, the bottom of the movable fixed plate is fixed with movable teeth, a drive gear meshes with the movable teeth, a rotating shaft is fixed on the drive gear, a drive motor is fixed at one end of the rotating shaft, and the drive motor is fixed on the support base through a motor base.

[0018] Preferably, an air pump is fixed to the bottom of the support base via a housing. One end of the air pump is connected to a tee via an air pipe. One end of the air pipe is connected to a fixed expansion airbag, and another end of the air pipe is connected to a dynamic expansion airbag. A reset switch for controlling the opening and closing of the air pump is fixed on the side wall of the support base.

[0019] Preferably, a limiting rod is slidably inserted into the support base, a fixing rod is fixed to one end of the limiting rod, a spring is fixed to the limiting rod, the other end of the spring is fixed in the support base, a moving rod is inserted into the fixing rod, an inclined block is fixed to the side wall of the fixing rod, and a baffle is fixed to the side wall of the moving rod.

[0020] This invention also provides a welding method for welding equipment suitable for lightweight large-diameter agricultural machinery drive shaft assemblies, comprising the following steps:

[0021] S1. Place the drive shaft assembly to be welded onto the support base and adjust it to a suitable position according to the location of the welding unit;

[0022] S2. Fix the drive shaft assembly by controlling the operation of the support components through the console;

[0023] S3. Weld the drive shaft assembly by controlling the operation of the tilting component and welding unit through the console.

[0024] S4. After welding is completed, use the control console to loosen the support assembly to fix the drive shaft assembly;

[0025] S5. Replace with the next drive shaft assembly to be welded and continue the welding operation.

[0026] Preferably, in the flipping assembly, the drive motor drives the drive gear to rotate one revolution, causing the support base to deflect by 3-5°.

[0027] This invention provides welding equipment and a welding method for lightweight, large-diameter agricultural machinery drive shaft assemblies. Compared with existing technologies, it has the following advantages:

[0028] (1) The welding equipment and welding method for the lightweight large-diameter agricultural machinery drive shaft assembly are provided by setting up a drive shaft assembly, a welding unit, a control console, a support plate, circumferential teeth, a cover, a sliding rod, a support rod, a circumferential gear, a power shaft, a power motor, and a support base. The shaft tube and bushing in the drive shaft assembly to be welded are placed in the corresponding support plate, and the support plate is fixed on the base by the mounting rod. Then, the shaft tube and bushing in the drive shaft assembly are fixed on the corresponding support base, so that the shaft tube, bushing, and support plate are in a coaxial state. Then, the welding unit is used to weld the shaft tube and bushing. During the welding process, the shaft tube and bushing in the drive shaft assembly can remain relatively stationary and rotate synchronously along the circumference of the support plate. There is no need for the welder to move the welding gun along the welding point, so that the weld is uniform and flat, and the welding quality is improved.

[0029] (2) The welding equipment and welding method for the lightweight large-diameter agricultural machinery drive shaft assembly are as follows: A fixed plate, electromagnet, fixed expansion airbag, fixed extrusion plate, fixed protrusion strip, movable fixed plate, movable gear, movable expansion airbag, movable extrusion plate, movable protrusion strip, magnet, guide rod, drive motor, rotating shaft, and drive gear are installed. A support base provides support to the fixed plate, and the support base and fixed plate provide support to the drive shaft assembly. After the drive shaft assembly to be welded is placed in the appropriate position, the drive motor is started via the control console, causing the movable fixed plate to move to the desired position. Figure 8 The drive shaft assembly is then fixed to the support base by the cooperation of the fixed extrusion plate, fixed protrusion strip, moving extrusion plate, and moving protrusion strip. After welding is completed, the control console electromagnet is de-energized, and the drive motor rotates in reverse, causing the moving extrusion plate to return to its original position. Figure 5 As shown, the welded drive shaft assembly can be removed from the designated position. The fixed and movable fixed plates are arc-shaped, making it easy to place the drive shaft assembly on the fixed and movable fixed plates and support base. The design can be adjusted according to the diameter of the drive shaft assembly to be welded, and can adapt to welding operations of drive shaft assemblies of various diameters.

[0030] (3) The welding equipment and welding method for the lightweight large-diameter agricultural machinery drive shaft assembly, by setting up an air pump, a three-way valve, an air pipe, a reset switch, a wedge, a fixing rod, a limit rod, a spring, a moving rod, and a baffle, when the moving fixed plate moves to the position driven by the drive motor... Figure 8 During the process shown, as the guide rod slides into the support base, it will push the baffle to move synchronously, allowing the inclined block to push the reset switch open. The reset switch controls the air pump to start, thereby delivering air through the air pipe and tee to the fixed expansion air bladder and the dynamic expansion air bladder. After welding is completed, the reset switch will automatically reset and close, and then the dynamic extrusion plate will reset to the position shown. Figure 5 The welded drive shaft assembly can be removed from the location shown. There is no need to use electrical signals to control the start and stop of the air pump. It can be controlled by mechanical parts, which is more reliable and makes it easier to troubleshoot the fault. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0033] Figure 3 This is a schematic diagram of the combined state of the support rod of the present invention;

[0034] Figure 4 This is a schematic diagram showing the exploded state of the support rod of the present invention;

[0035] Figure 5 This is a structural diagram of the electromagnet of the present invention;

[0036] Figure 6 This is a structural diagram of the drive motor of the present invention;

[0037] Figure 7 This is a schematic diagram of the initial state of the movable fixing plate of the present invention;

[0038] Figure 8 This is a schematic diagram showing the operating state of the movable fixing plate of the present invention;

[0039] Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle;

[0040] Figure 10 This is a schematic diagram of the combined state of the guide rod and the baffle of the present invention;

[0041] Figure 11 For the present invention Figure 10 Enlarged view of point B in the middle;

[0042] Figure 12 This is an exploded view of the movable fixing plate of the present invention;

[0043] Figure 13 This is an exploded view of the fixing plate of the present invention.

[0044] In the diagram: 1. Drive shaft assembly; 11. Welding unit; 12. Control console; 2. Support plate; 21. Circumferential gear; 22. Cover; 23. Sliding rod; 24. Support rod; 25. Circumferential gear; 26. Power shaft; 27. Power motor; 3. Support base; 4. Fixed plate; 41. Electromagnet; 42. Fixed expansion airbag; 43. Fixed extrusion plate; 44. Fixed protrusion; 45. Moving fixed plate; 451. Moving gear; 46. Moving expansion airbag; 47. Moving extrusion plate; 48. Moving protrusion; 49. Magnet; 410. Guide rod; 411. Drive motor; 412. Rotating shaft; 413. Drive gear; 5. Air pump; 51. T-junction; 52. Air pipe; 53. Reset switch; 54. Wedge; 55. Fixed rod; 56. Limit rod; 57. Spring; 58. Moving rod; 59. Baffle. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Please see Figures 1-13 The present invention provides the following technical solutions:

[0047] Example 1: Welding equipment and method for lightweight large-diameter agricultural machinery drive shaft assembly, including drive shaft assembly 1, welding unit 11 located on the front of drive shaft assembly 1 for welding drive shaft assembly 1, and control console 12 located on the front of drive shaft assembly 1 for controlling the welding process. The drive shaft assembly 1 is externally provided with a flipping assembly for driving drive shaft assembly 1. The flipping assembly includes: support plate 2, mounting rod, circumferential teeth 21, cover 22, sliding rod 23, support rod 24, circumferential gear 25, drive shaft 26, and drive motor 27.

[0048] One end of the support rod 24 is fixedly mounted on the support base 3 by bolts to provide support force to the support base 3. The outer wall of the power motor 27 is fixedly mounted on the support rod 24 through the motor box to provide power to the tilting assembly. A power shaft 26 is fixedly mounted on the output end of the power motor 27 through a coupling. The power shaft 26 is movably inserted into the support rod 24 through a bearing. A circumferential gear 25 is fixedly mounted on one end of the power shaft 26. A ring of circumferential teeth 21 meshes on the circumferential gear 25. The circumferential teeth 21 are fixedly mounted on the circular support plate 2. A cover 22 is covered on the circumferential teeth 21. One end of the cover 22 is fixedly mounted on the support plate 2. An installation rod for providing support force is fixedly mounted on the bottom of the support plate 2. A circular groove is opened on the side wall of the support plate 2. A T-shaped sliding rod 23 is fixedly mounted on one end of the support rod 24. One end of the sliding rod 23 is slidably placed in the circular groove.

[0049] In use, the shaft tube and bushing of the drive shaft assembly 1 to be welded are placed into the corresponding support plate 2. The support plate 2 is fixed to the base by the mounting rod. Then, the shaft tube and bushing of the drive shaft assembly 1 are fixed to the corresponding support seat 3, so that the shaft tube, bushing and support plate 2 are in a coaxial state. Then, the welding unit 11 is used to weld the shaft tube and bushing. During the welding process, the power motor 27 is started by the control console 12. The power motor 27 drives the power shaft 26 to rotate. The power shaft 26 drives the circumferential gear 25 to rotate. The circumferential gear 25 meshes with the circumferential teeth 21. The support plate 2 provides support force to the circumferential teeth 21, so that the circumferential gear 25 can make circumferential motion along the support plate 2.

[0050] The support rod 24 provides support force to the drive shaft 26 and also provides support force to the sliding rod 23. One end of the sliding rod 23 is located inside the support plate 2 and the two slide together. The support seat 3 provides support force to the support rod 24, so that the drive shaft 26 drives the support rod 24 and the support seat 3 to move in a circular motion along the support plate 2 in a synchronous manner. Through the corresponding support seat 3, the shaft tube and bushing in the transmission shaft assembly 1 are driven to rotate synchronously, thereby completing the welding operation.

[0051] Example 2, the technical solution of which differs from Example 1 includes: a support assembly for fixing the transmission shaft assembly 1 is provided on the outside of the transmission shaft assembly 1. The support assembly includes a support base 3, a fixed fixing plate 4, an electromagnet 41, a fixed expansion airbag 42, a fixed compression plate 43, a fixed protrusion 44, a movable fixing plate 45, a movable expansion airbag 46, a movable compression plate 47, a movable protrusion 48, a magnet 49, a guide rod 410, a drive motor 411, a rotating shaft 412, a drive gear 413, an air pump 5, a three-way valve 51, and an air pipe 52.

[0052] The top of the support base 3 is arc-shaped and the arc surface abuts against the bottom of the drive shaft assembly 1 to support the drive shaft assembly 1. One end of the fixed plate 4 is fixedly installed on the side wall of the support base 3 and is arc-shaped to support the drive shaft assembly 1. A fixed expansion airbag 42 is fixedly installed inside the fixed plate 4. Three fixed extrusion plates 43 are fixedly installed on the side wall of the fixed expansion airbag 42. Three fixed protrusion strips 44 are fixedly installed on each of the three fixed extrusion plates 43. The fixed extrusion plates 43 are made of hard rubber material, and the fixed protrusion strips 44 are made of soft rubber material. An electromagnet 41 is fixedly installed on the fixed plate 4.

[0053] One end of the movable fixing plate 45 is slidably inserted into the support base 3 and the fixed fixing plate 4 to fix the drive shaft assembly 1. A guide rod 410 is fixedly installed on the side wall of the movable fixing plate 45. The side wall of the guide rod 410 is slidably inserted into the support base 3 and the fixed fixing plate 4 and is slidably adapted to the support base 3 and the fixed fixing plate 4. A movable expansion airbag 46 is fixedly installed in the movable fixing plate 45. Two movable compression plates 47 are fixedly installed on the movable expansion airbag 46. Both movable compression plates 47 are fixedly installed with tools to increase the friction between the pressure plate and the drive shaft assembly 1. The moving protrusion 48, a magnet 49 is fixedly installed at one end of the moving fixed plate 45, the magnet 49 is attracted to the magnet 41 after it is energized, a row of moving teeth 451 is fixedly installed at the bottom of the moving fixed plate 45, a drive gear 413 meshes on the moving teeth 451, the side wall of the drive gear 413 is fixedly connected to one end of the rotating shaft 412, one end of the rotating shaft 412 is fixedly installed on the output end of the drive motor 411 through a coupling, and the side wall of the drive motor 411 is fixedly installed on the support base 3 through a motor base;

[0054] An air pump 5 is fixedly installed at the bottom of the support base 3 through the box. There are three air pipes 52. One end of the air pump 5 is fixedly connected to one end of the tee 51 through one of the air pipes 52. One end of the air pipe 52 is fixedly connected to one end of the tee 51. The other end of the air pipe 52 is fixedly connected to the air inlet of the fixed inflation airbag 42. One end of the last air pipe 52 is fixedly connected to the last end of the tee 51. The other end of the air pipe 52 is fixedly connected to the air inlet of the dynamic inflation airbag 46.

[0055] In use, the support base 3 provides support to the fixed plate 4, and the support base 3 and the fixed plate 4 provide support to the transmission shaft assembly 1. After the transmission shaft assembly 1 to be welded is placed in the appropriate position, the control console 12 controls the start of the drive motor 411. The drive motor 411 drives the rotating shaft 412 to rotate, and the rotating shaft 412 drives the drive gear 413 to rotate. The drive gear 413 meshes with the moving gear 451, and the moving gear 451 drives the moving fixed plate 45 to move. The moving fixed plate 45 drives the guide rod 410 to move. The guide rod 410 slides and adapts with the fixed plate 4 and the support base 3, thereby driving the moving fixed plate 45 to move along the fixed plate 4 and the support base 3 until the moving fixed plate 45 moves to the desired position. Figure 8 When the position is shown, the drive motor 411 is stopped by the control console 12, and the electromagnet 41 is energized by the control console 12 and attracted together with the magnet 49 to fix the position of the moving fixed plate 45.

[0056] Subsequently, the control console 12 controls the air pump 5 to operate, delivering air through the air pipe 52 and the three-way valve 51 to the fixed expansion airbag 42 and the movable expansion airbag 46, causing the fixed expansion airbag 42 and the movable expansion airbag 46 to expand. This drives the fixed extrusion plate 43, the fixed protrusion 44, the movable extrusion plate 47, and the movable protrusion 48 to extend from the fixed plate 4 and the movable fixed plate 45 and press against the surface of the drive shaft assembly 1. The fixed extrusion plate 43, the fixed protrusion 44, the movable extrusion plate 47, and the movable protrusion 48 cooperate to fix the drive shaft assembly 1 onto the support base 3. After welding is completed, the control console electromagnet 41 is de-energized, and the drive motor 411 rotates in reverse, causing the movable fixed plate 45 to return to its original position. Figure 5 At the location shown, the welded drive shaft assembly 1 can be removed.

[0057] Example 3, the technical solution of which differs from Example 2 includes: the support assembly further includes: a reset switch 53, a wedge block 54, a fixing rod 55, a limiting rod 56, a spring 57, a moving rod 58, and a baffle 59.

[0058] A reset switch 53 for controlling the opening and closing of the air pump 5 is fixedly installed on the side wall of the support base 3. A limiting rod 56 is slidably inserted through the support base 3. A fixing rod 55 is fixedly installed at one end of the limiting rod 56. A spring 57 is fixedly installed on the side wall of the limiting rod 56. The other end of the spring 57 is fixedly installed in the support base 3. A moving rod 58 is slidably inserted through the fixing rod 55. A wedge 54 is fixedly installed on the side wall of the fixing rod 55. A baffle 59 is fixedly installed on the side wall of the moving rod 58.

[0059] In use, when the movable fixed plate 45 moves to the position driven by the drive motor 411, Figure 8During the process of moving to the position shown, when the guide rod 410 slides into the support base 3, it will squeeze the baffle 59 to move synchronously. The baffle 59 drives the moving rod 58 to move, and the moving rod 58 drives the fixed rod 55 to move. At the same time, the moving rod 58 can slide vertically within the fixed rod 55. The fixed rod 55 drives the limiting rod 56 to move. The limiting rod 56 slides with the support base 3, so that the fixed rod 55 can only move in a straight line in the horizontal direction under the drive of the moving rod 58. The fixed rod 55 drives the inclined block 54 to move, and the inclined block 54 squeezes the reset switch 53 to move.

[0060] When the fixed plate 45 moves to Figure 8 When the position is shown, the inclined block 54 just squeezes the reset switch 53 to open, and the reset switch 53 controls the air pump 5 to start, thereby delivering air through the air tube 52 and the three-way valve 51 to the fixed inflation airbag 42 and the dynamic inflation airbag 46.

[0061] After welding is completed, the guide rod 410 no longer applies force to the baffle 59, causing the moving rod 58 to return to its original position under the action of the spring 57. Figure 5 At the indicated position, the reset switch 53 automatically resets and closes. At this time, the control console 12 controls the electromagnet 41 to de-energize and the drive motor 411 to rotate in the reverse direction, causing the moving fixed plate 45 to reset to the indicated position. Figure 5 At the location shown, the welded drive shaft assembly 1 can be removed.

[0062] This invention also provides a welding method for a lightweight, large-diameter agricultural machinery drive shaft assembly, comprising the following steps:

[0063] S1. Place the drive shaft assembly 1 to be welded onto the support base 3, and adjust it to a suitable position according to the location of the welding unit 11;

[0064] S2. Fix the drive shaft assembly 1 by controlling the operation of the support component through the control console 12;

[0065] S3. The rotating assembly and welding unit 11 are controlled by the control console 12 to weld the drive shaft assembly 1.

[0066] S4. After welding is completed, control the support assembly via console 12 to loosen the fixation on the drive shaft assembly 1;

[0067] S5. Replace with the next drive shaft assembly 1 to be welded and continue the welding operation.

[0068] In the flipping assembly, the drive motor 411 drives the drive gear 413 to rotate one revolution, causing the support base 3 to deflect by 3-5°.

[0069] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0070] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding device for a lightweight large-diameter agricultural machinery drive shaft assembly, comprising a drive shaft assembly (1), a welding unit (11) for welding the drive shaft assembly (1), and a control console (12) for controlling the welding process, characterized in that: The drive shaft assembly (1) is externally provided with a support assembly for fixing the drive shaft assembly (1) and a tilting assembly for driving the drive shaft assembly (1), the support assembly including: The support (3) is placed below the drive shaft assembly (1) to support the drive shaft assembly (1). Fixed plate (4) is fixed on support base (3) to support drive shaft assembly (1); A movable fixing plate (45) is slidably installed in the support base (3) and the fixed fixing plate (4) to fix the transmission shaft assembly (1). A guide rod (410) is fixed on the movable fixing plate (45). The guide rod (410) is slidably adapted to the support base (3) and the fixed fixing plate (4). The flipping component includes: The support rod (24) is fixed on the support base (3) to provide support force to the support base (3); A power motor (27) is fixed on a support rod (24) via a motor housing to provide power to the flipping assembly. A power shaft (26) is fixed on the power motor (27). The power shaft (26) passes through the support rod (24). A circumferential gear (25) is fixed at one end of the power shaft (26). The circumferential gear (25) is meshed with circumferential teeth (21), and a circular support plate (2) is fixed on the circumferential teeth (21). The circumferential teeth (21) are covered with a cover (22), one end of the cover (22) is fixed on the support plate (2), and a mounting rod for providing support force is fixed at the bottom of the support plate (2). A circular sliding groove is opened on the side wall of the support plate (2), and a sliding rod (23) is fixed at one end of the support rod (24). One end of the sliding rod (23) is slidably placed in the circular sliding groove. A fixed expansion airbag (42) is fixed inside the fixed plate (4). A fixed compression plate (43) is fixed on the fixed expansion airbag (42). A fixed protrusion strip (44) is fixed on the fixed compression plate (43). An electromagnet (41) is fixed on the fixed plate (4). A movable expansion airbag (46) is fixed in the movable fixed plate (45). A movable compression plate (47) is fixed on the movable expansion airbag (46). A movable protrusion strip (48) is fixed on the movable compression plate (47). A magnet (49) is fixed to one end of the moving fixed plate (45). An air pump (5) is fixed to the bottom of the support base (3) through the box. One end of the air pump (5) is connected to a three-way valve (51) through an air pipe (52). One end of the air pipe (52) is connected to a fixed expansion airbag (42). One end of the air pipe (52) is connected to a moving expansion airbag (46). A reset switch (53) for controlling the opening and closing of the air pump (5) is fixed on the side wall of the support base (3).

2. The welding equipment for the lightweight large-diameter agricultural machinery drive shaft assembly according to claim 1, characterized in that: The bottom of the movable fixed plate (45) is fixed with a movable tooth (451), a drive gear (413) meshes with the movable tooth (451), a rotating shaft (412) is fixed on the drive gear (413), a drive motor (411) is fixed at one end of the rotating shaft (412), and the drive motor (411) is fixed on the support base (3) through a motor seat.

3. The welding equipment for the lightweight large-diameter agricultural machinery drive shaft assembly according to claim 1, characterized in that: A limiting rod (56) is slidably inserted in the support base (3). A fixing rod (55) is fixed at one end of the limiting rod (56). A spring (57) is fixed on the limiting rod (56). The other end of the spring (57) is fixed in the support base (3). A moving rod (58) is inserted in the fixing rod (55). An inclined block (54) is fixed on the side wall of the fixing rod (55). A baffle (59) is fixed on the side wall of the moving rod (58).

4. A welding method applicable to welding equipment for the lightweight large-diameter agricultural machinery drive shaft assembly according to any one of claims 1-3, characterized in that, Includes the following steps: S1. Place the drive shaft assembly (1) to be welded on the support base (3) and adjust it to a suitable position according to the location of the welding unit (11); S2. Fix the drive shaft assembly (1) by controlling the operation of the support assembly through the control console (12); S3. The rotating assembly and welding unit (11) are controlled by the control console (12) to weld the drive shaft assembly (1); S4. After welding is completed, the support assembly is loosened by controlling the control console (12) to fix the drive shaft assembly (1); S5. Replace the next drive shaft assembly to be welded (1) and continue the welding operation.

5. The welding method of the welding equipment for the lightweight large-diameter agricultural machinery drive shaft assembly according to claim 4, characterized in that: In the flipping assembly, the drive motor (411) drives the drive gear (413) to rotate one revolution, causing the support base (3) to deflect by 3-5°.

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