A welding auxiliary tool for large-scale cycloid motor shell tailor welding

Abstract

The present application belongs to the field of motor shell tailor welding, and particularly relates to a welding auxiliary tool for large cycloid motor shell tailor welding, which comprises a workbench, a control device is fixedly connected to the outside of the workbench, a guide rail is fixedly connected to the inside of the workbench, two external clamping assemblies are arranged on the top of the workbench, and the external clamping assemblies comprise support tables fixedly connected to the top of the workbench. The motor shell is used for pushing the double-layer limiting tables, compressing the springs, driving the multiple groups of clamping rods to rotate synchronously, driving the clamping rods to clamp inwardly, and enabling the clamping pieces to uniformly apply radial clamping force to the outer wall of the shell, so that the shell is fixed at the center position of the rotating cylinder and a stable reference is provided for subsequent tailor welding. The distance between the double support tables is adjustable, and the multiple-paw self-adaptive clamping structure can be matched with the large cycloid motor shell of different diameters, so that the pain point that the traditional tooling cannot stably clamp the large-size shell is solved.

Description

Technical Field

[0001] This invention belongs to the field of motor housing welding, specifically a welding auxiliary tooling for welding the housing of a large cycloidal motor. Background Technology

[0002] The internal gear ring is fixedly connected to the housing, and the oil entering through the oil port drives the rotor to revolve around a central point. This slowly rotating rotor, driven by a splined shaft, is called a cycloidal hydraulic motor.

[0003] When welding the cycloidal motor housing, the position of the housing needs to be restricted first, and then the motor housing is welded by the welding device. However, many of the positioning devices currently used can only weld smaller motors, which cannot ensure the stability of the motor housing. This can cause the housing to shift during welding, resulting in defects in the housing weld and the need for re-welding, which reduces production efficiency. Furthermore, the original welding marks are difficult to remove, requiring the motors to be polished multiple times after production, further reducing production efficiency.

[0004] Therefore, the present invention provides a welding auxiliary tooling for welding the housing of a large cycloidal motor. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: A welding auxiliary fixture for welding the housing of a large cycloidal motor, comprising a worktable, a control device fixedly connected to the outside of the worktable, a guide rail fixedly connected inside the worktable, and two external clamping assemblies on the top of the worktable. Each external clamping assembly includes a support platform fixedly connected to the top of the worktable. One of the support platforms has a roller fixedly connected to its bottom, the roller being slidably connected to the inside of the guide rail. A positioning cylinder is fixedly connected inside the support platform, a rotating cylinder is rotatably connected inside the positioning cylinder, a positioning disk is fixedly connected inside the rotating cylinder, a spring is fixedly connected to the outside of the positioning disk, a double-layer limiting platform is fixedly connected to the end of the spring, and a first rotating seat is fixedly connected to the outside of the double-layer limiting platform. Two first rotating seats are provided, a pull rod is rotatably connected inside the first rotating seat, and a second first rotating seat is fixedly connected to the end of the pull rod. A clamping rod is rotatably connected inside the second pull rod, a second rotating seat is rotatably connected to the outside of one end of the clamping rod, and a clamping component is rotatably connected to the outside of the other end of the clamping rod. The second rotating seat is fixedly connected to the outside of the rotating cylinder.

[0007] Preferably, the double-layer limiting platform is provided with an internal limiting component. The internal limiting component includes a first motor fixedly connected to the inside of the double-layer limiting platform, a first transmission rod fixedly connected to the transmission end of the first motor, the end of the first transmission rod being rotatably connected to the inside of the double-layer limiting platform, and a first bevel gear fixedly connected to the outside of the first transmission rod.

[0008] Preferably, the internal limiting assembly further includes a second bevel gear meshing with the outside of the first bevel gear, a rotating rod fixedly connected to the outside of the second bevel gear, the end of the rotating rod being rotatably connected to the inside of the double-layer limiting platform, a transmission block being drivenly connected to the outside of the rotating rod, a top block being fixedly connected to the end of the transmission block, and the transmission block penetrating the double-layer limiting platform and being slidably connected.

[0009] Preferably, a rotating assembly is provided on the outer side of the support platform. The rotating assembly includes a back plate fixedly connected to the outer side of the support platform, a connecting ring fixedly connected to the outer side of the back plate, the outer side of the connecting ring being slidably connected to the inside of the rotating cylinder, a second motor fixedly connected to the outer side of the back plate, a second transmission rod fixedly connected to the transmission end of the second motor, the end of the second transmission rod being rotatably connected to the outer side of the positioning plate, and a first gear fixedly connected to the outer side of the second transmission rod.

[0010] Preferably, the rotating assembly further includes a second gear meshing with the outside of the first gear, a third transmission rod fixedly connected inside the second gear, one end of the third transmission rod being rotatably connected to the outside of the rear back plate, and the other end being rotatably connected to a rotating ring, a gear ring meshing with the outside of the second gear, the gear ring being fixedly connected inside the rotating cylinder, and the outside of the rotating ring being slidably connected to the inside of the positioning disk.

[0011] Preferably, a pushing assembly is provided on the top of the workbench. The pushing assembly includes a support plate fixedly connected to the top of the workbench. A hydraulic rod is fixedly connected inside the support plate. A cross plate is fixedly connected to the end of the hydraulic rod. A connecting rod is fixedly connected to the outside of the cross plate. The end of the connecting rod is fixedly connected to the outside of the back plate.

[0012] Preferably, the pushing assembly further includes two upright plates fixedly connected to the top of the workbench, and a sliding rod fixedly connected between the two upright plates, with the outer side of the sliding rod slidably connected to the inside of the support platform.

[0013] Preferably, the workbench is provided with a collection component, which includes a collection box slidably connected to the inside of the workbench, a handle fixedly connected to the outside of the collection box, and casters fixedly connected to the bottom of the collection box.

[0014] Preferably, the guide rail has a groove inside, and the outer side of the double-layer limiting platform is slidably connected to the inside of the rotating cylinder.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention uses a motor housing to push a double-layer limiting stage, causing the stage to move radially. This compresses a spring and drives multiple sets of clamping rods to rotate synchronously, clamping the stage inward. This applies a uniform radial clamping force from the outer wall of the housing, fixing the housing at the center of the rotating cylinder and providing a stable reference for subsequent welding. The distance between the two support stages is adjustable, and with the multi-jaw adaptive clamping structure, it can accommodate large cycloidal motor housings of different diameters, solving the problem that traditional tooling cannot stably clamp large-sized housings. The spring's rebound force provides the double-layer limiting stage with the power to return to its original position, facilitating repeated operations. Multiple sets of clamping elements are evenly distributed along the circumference of the housing, applying clamping force synchronously to ensure that the center of the housing is coaxial with the rotating cylinder, improving positioning accuracy.

[0017] 2. This invention starts a first motor, which drives a rotating rod to rotate via bevel gear transmission. This drives multiple sets of transmission blocks to extend radially synchronously, causing the top blocks to press against the inner wall of the housing, thus centering and positioning the inner hole of the housing and forming a double clamping mechanism with the external clamping components. The external multi-jaw clamping combined with the internal multiple sets of top blocks provides circumferential all-around constraint, completely eliminating radial movement and circumferential rotation of the housing during welding, ensuring welding accuracy. The synchronous extension of multiple sets of top blocks automatically centers the housing with the center as the reference, ensuring that the coaxiality error between the outer circle and the inner hole of the housing is ≤0.03mm, meeting the coaxiality requirements of subsequent processing. The extension stroke of the top blocks is adjustable, adapting to housings with different inner diameters, allowing welding of various specifications of products without changing tooling. The extension and retraction of the top blocks can be controlled by a single button via a control device, eliminating the need for manual adjustment. A single person can complete the clamping and positioning of the housing, thereby improving work efficiency.

[0018] 3. This invention drives the first gear to rotate via the second transmission rod. The first gear meshes with the second gear, driving the third transmission rod to rotate. Simultaneously, the second gear meshes with a gear ring fixed inside the rotating cylinder, thereby driving the rotating cylinder to slowly rotate the entire housing. During welding, the second motor can drive the housing to rotate at a uniform speed, allowing the welding torch to complete continuous welding of the circumferential seam from a fixed position. The gear transmission ensures that the housing rotation speed is uniform and without fluctuations, the relative speed between the welding torch and the weld is constant, and the weld formation is uniform, without defects such as weld deviation or undercut. The multi-stage gear meshing transmission has a large torque, which can stably drive the rotation of large housings without slippage or jamming, making it suitable for heavy-duty working conditions. The rotation speed can be adjusted according to the housing wall thickness and welding method, adapting to various welding processes such as submerged arc welding and gas shielded welding, making it highly versatile. It can achieve bidirectional rotation in both forward and reverse directions, making it easy to adjust the weld to the optimal welding position and reduce welding dead angles. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall side view structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the disassembled structure of the collection component in this invention;

[0022] Figure 3 This is a schematic diagram of the disassembled structure of the rotating component and the external clamping component in this invention;

[0023] Figure 4 This is a schematic diagram of the disassembled structure of the external clamping component in this invention;

[0024] Figure 5 This is a schematic diagram of the disassembled structure of the internal limiting component in this invention;

[0025] Figure 6 This is a side view of the external clamping component and the internal clamping component in this invention.

[0026] Figure 7 This is a schematic diagram of the disassembled structure of the rotating component in this invention;

[0027] Figure 8 This is a side view of the pushing component structure in this invention.

[0028] In the diagram: 1. Workbench; 2. Control device; 3. Guide rail; 4. Support platform; 5. Roller; 6. Positioning cylinder; 7. Rotating cylinder; 8. Positioning disc; 9. Spring; 10. Double-layer limiting platform; 11. First rotating seat; 12. Pull rod; 13. Clamping rod; 14. Clamping component; 15. Second rotating seat; 16. First motor; 17. First transmission rod; 18. First bevel gear; 19. Second bevel gear; 20. Rotating rod; 21. Transmission block; 22. Top block; 23. Vertical plate; 24. Slide rod; 25. Back plate; 26. Connecting ring; 27. Second motor; 28. Second transmission rod; 29. ​​First gear; 30. Second gear; 31. Third transmission rod; 32. Gear ring; 33. Rotating ring; 34. Support plate; 35. Hydraulic rod; 36. Cross plate; 37. Connecting rod; 38. Collection box; 39. Handle; 40. Caster wheel. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] Example 1: As Figures 1 to 8As shown in the figure, a welding auxiliary fixture for welding the housing of a large cycloidal motor according to an embodiment of the present invention includes a worktable 1, a control device 2 fixedly connected to the outside of the worktable 1, a guide rail 3 fixedly connected to the inside of the worktable 1, and two external clamping assemblies provided on the top of the worktable 1. The external clamping assemblies include a support platform 4 fixedly connected to the top of the worktable 1, one of the support platforms 4 having a roller 5 fixedly connected to its bottom, the roller 5 being slidably connected to the outside of the guide rail 3, a positioning cylinder 6 fixedly connected to the inside of the support platform 4, a rotating cylinder 7 rotatably connected to the inside of the positioning cylinder 6, and a fixed connection inside the rotating cylinder 7. There is a positioning plate 8, and a spring 9 is fixedly connected to the outside of the positioning plate 8. A double-layer limiting platform 10 is fixedly connected to the end of the spring 9. A first rotating seat 11 is fixedly connected to the outside of the double-layer limiting platform 10. There are two first rotating seats 11. A pull rod 12 is rotatably connected inside the first rotating seat 11. A second first rotating seat 11 is fixedly connected to the end of the pull rod 12. A clamping rod 13 is rotatably connected inside the second pull rod 12. A second rotating seat 15 is rotatably connected to the outside of one end of the clamping rod 13, and a clamping member 14 is rotatably connected to the outside of the other end. The second rotating seat 15 is fixedly connected to the outside of the rotating cylinder 7.

[0031] During operation, the motor housing is placed between two support platforms 4, and the sliding movable support platforms 4 achieve axial positioning of the housing. When the motor housing is clamped, the motor housing pushes the double-layer limiting platform 10, thereby causing the double-layer limiting platform 10 to move radially, which in turn compresses the spring 9 and drives multiple sets of clamping rods 13 to rotate synchronously, thereby causing the clamping rods 13 to clamp inward, so that the clamping member 14 applies a uniform radial clamping force from the outer wall of the housing, fixing the housing at the center position of the rotating cylinder 7, providing a stable reference for subsequent welding.

[0032] With dual support platforms and four adjustable spacings, combined with a multi-jaw adaptive clamping structure, it can be adapted to large cycloidal motor housings of different diameters, solving the pain point that traditional tooling cannot stably clamp large-sized housings.

[0033] The rebound force of spring 9 provides the double-layer limiting platform 10 with the power to return to its original position, which facilitates subsequent multiple operations;

[0034] Multiple sets of clamping components 14 are evenly distributed along the circumference of the housing and apply clamping force synchronously to ensure that the center of the housing is coaxial with the rotating cylinder 7, and the radial positioning error is ≤0.05mm;

[0035] The rotating cylinder 7 can drive the entire shell to rotate, which facilitates continuous circumferential welding without the need for frequent adjustments to the welding position, thus greatly improving welding efficiency.

[0036] The double-layer limiting platform 10 is equipped with an internal limiting component, which includes a first motor 16 fixedly connected inside the double-layer limiting platform 10. The transmission end of the first motor 16 is fixedly connected to a first transmission rod 17. The end of the first transmission rod 17 is rotatably connected to the inside of the double-layer limiting platform 10. A first bevel gear 18 is fixedly connected to the outside of the first transmission rod 17.

[0037] The internal limiting assembly also includes a second bevel gear 19 meshing with the outside of the first bevel gear 18. A rotating rod 20 is fixedly connected to the outside of the second bevel gear 19. The end of the rotating rod 20 is rotatably connected to the inside of the double-layer limiting platform 10. A transmission block 21 is driven to the outside of the rotating rod 20. A top block 22 is fixedly connected to the end of the transmission block 21. The transmission block 21 passes through the double-layer limiting platform 10 and is slidably connected.

[0038] During operation, after the housing is externally clamped, the first motor 16 is started, which drives the rotating rod 20 to rotate through the bevel gear transmission. This drives multiple sets of transmission blocks 21 to extend radially in sync, so that the top block 22 presses against the inner wall of the housing, thereby achieving centering and positioning of the inner hole of the housing and forming a double clamping with the external clamping member 14.

[0039] External multi-jaw clamping and internal multiple sets of top blocks 22 clamping form a circumferential all-round constraint, completely eliminating radial movement and circumferential rotation of the shell during the welding process, ensuring welding accuracy;

[0040] Multiple sets of top blocks 22 extend synchronously and automatically center themselves with the center of the housing as a reference, so that the coaxiality error between the outer circle and the inner hole of the housing is ≤0.03mm, which meets the coaxiality requirements of subsequent processing.

[0041] The extension stroke of the top block 22 is adjustable, which can be adapted to housings with different inner diameters, and welding of various specifications of products can be completed without changing tooling.

[0042] The top block 22 can be extended and retracted with one click by the control device 2, without the need for manual adjustment, and a single person can complete the clamping and positioning of the shell.

[0043] The support platform 4 is provided with a rotating assembly on its outer side. The rotating assembly includes a back plate 25 fixedly connected to the outer side of the support platform 4. A connecting ring 26 is fixedly connected to the outer side of the back plate 25. The outer side of the connecting ring 26 is slidably connected to the inside of the rotating cylinder 7. A second motor 27 is fixedly connected to the outer side of the back plate 25. A second transmission rod 28 is fixedly connected to the transmission end of the second motor 27. The end of the second transmission rod 28 is rotatably connected to the outer side of the positioning plate 8. A first gear 29 is fixedly connected to the outer side of the second transmission rod 28.

[0044] The rotating assembly also includes a second gear 30 meshing with the outer side of the first gear 29. A third transmission rod 31 is fixedly connected inside the second gear 30. One end of the third transmission rod 31 is rotatably connected to the outer side of the back plate 25, and the other end is rotatably connected to a rotating ring 33. A gear ring 32 meshes with the outer side of the second gear 30. The gear ring 32 is fixedly connected inside the rotating cylinder 7. The outer side of the rotating ring 33 is slidably connected to the inside of the positioning disk 8.

[0045] During operation, the second motor 27 drives the first gear 29 to rotate via the second transmission rod 28. The first gear 29 meshes with the second gear 30, which in turn drives the third transmission rod 31 to rotate. At the same time, the second gear 30 meshes with the gear ring 32 fixed inside the rotating cylinder 7, thereby driving the rotating cylinder 7 to rotate the entire housing slowly.

[0046] During welding, the second motor 27 can drive the housing to rotate at a constant speed, so that the welding torch can complete the continuous welding of the circumferential seam in a fixed position.

[0047] Gear transmission ensures that the housing rotates at a uniform speed without fluctuations, the relative speed between the welding torch and the weld is constant, the weld is uniformly formed, and there are no defects such as off-center welding or undercut.

[0048] Multi-stage gear meshing transmission has a large torque, which can stably drive the rotation of large housings without slippage or jamming, making it suitable for heavy-duty working conditions.

[0049] The rotation speed can be adjusted according to the shell wall thickness and welding method, and it is compatible with various welding processes such as submerged arc welding and gas shielded welding, making it highly versatile.

[0050] It can rotate in both directions, making it easy to adjust the weld to the optimal welding position and reduce welding dead angles.

[0051] The workbench 1 is equipped with a pushing assembly on its top. The pushing assembly includes a support plate 34 fixedly connected to the top of the workbench 1. A hydraulic rod 35 is fixedly connected inside the support plate 34. A cross plate 36 is fixedly connected to the end of the hydraulic rod 35. A connecting rod 37 is fixedly connected to the outside of the cross plate 36. The end of the connecting rod 37 is fixedly connected to the outside of the back plate 25.

[0052] The pushing component also includes two upright plates 23 fixedly connected to the top of the workbench 1, and a slide rod 24 fixedly connected between the two upright plates 23. The outer side of the slide rod 24 is slidably connected to the inside of the support platform 4.

[0053] During operation, a support plate 34 is fixed on the top of the workbench 1, and a hydraulic rod 35 is installed inside. The end of the hydraulic rod 35 is fixedly connected to the back plate 25 through a cross plate 36 and a connecting rod 37. Two upright plates 23 are also fixed on the top of the workbench 1, and a sliding rod 24 is installed between the upright plates 23. The bottom of the support platform 4 slides in cooperation with the sliding rod 24.

[0054] During clamping, the hydraulic rod 35 is activated to push the movable support platform 4 to slide synchronously along the guide rail 3 and the slide bar 24, cooperating with the fixed support platform 4 to clamp and position the housing axially, while ensuring the coaxiality of the two support platforms 4.

[0055] The hydraulic rod 35 drives the support platform 4 to slide smoothly, and the slide rod 24 provides guidance to ensure that the support platform 4 moves without deviation, so that the coaxiality error of the support center at both ends of the housing is ≤0.05mm.

[0056] The hydraulic clamping force can be precisely adjusted to avoid excessive pressure causing deformation of the housing end face, while ensuring firm axial positioning and preventing axial movement during welding.

[0057] The support platform has a wide spacing adjustment range and can be adapted to motor housings with different axial lengths. It can clamp products of various specifications without changing tooling.

[0058] The hydraulic drive completes axial clamping and loosening with one click, reducing the clamping time from the traditional 10 minutes to less than 1 minute, greatly improving production efficiency.

[0059] The guide rail 3 has a groove inside, and the outer side of the double-layer limiting platform 10 is slidably connected to the inside of the rotating cylinder 7.

[0060] During operation and clamping, the double-layer limiting platform 10 can slide smoothly inside the rotating cylinder 7, ensuring that the elastic force of the spring 9 is evenly applied to multiple sets of clamping rods 13, thus avoiding local jamming or uneven force.

[0061] The precise sliding fit between the double-layer limiting platform 10 and the rotating cylinder 7 ensures that its radial extension and retraction movements are smooth and stable, without jamming or skew.

[0062] The guide structure ensures that the elastic force of multiple sets of springs 9 is transmitted synchronously, so that the clamping force of the clamping member 14 is evenly distributed in the circumference of the housing, avoiding excessive local stress.

[0063] The sliding guide structure reduces the wear of spring 9 and tie rod 12, extending the overall service life of the tooling by more than 2 times;

[0064] The double-layer limiting stage 10 has a large sliding stroke, which can be adapted to a wider range of housing diameters, further improving the versatility of the tooling.

[0065] Example 2: Figure 2 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a collection component is provided inside the workbench 1. The collection component includes a collection box 38 that is slidably connected inside the workbench 1. A handle 39 is fixedly connected to the outside of the collection box 38. A caster wheel 40 is fixedly connected to the bottom of the collection box 38.

[0066] During operation, after welding is completed, the collection box 38 can be directly pulled out from inside the workbench 1, the welding slag can be cleaned and then pushed back in, keeping the workbench surface clean.

[0067] The trough and collection box 38 structure can collect welding slag and spatter generated during the welding process, preventing the accumulation of welding slag from affecting the operation of tooling components;

[0068] The collection box 38 can be quickly pulled out for cleaning without disassembling the tooling, the cleaning time is short and it does not affect the continuity of production;

[0069] The bottom of the collection box 38 is equipped with casters 40, which can be easily moved by one person during cleaning without the need for lifting equipment;

[0070] Welding slag is collected and disposed of centrally to prevent fires caused by high-temperature welding slag, while also reducing the spread of metal dust and improving the working environment.

[0071] Working principle: The motor housing is placed between two support platforms 4, and the sliding movable support platforms 4 achieve axial positioning of the housing; when the motor housing is clamped, the motor housing pushes the double-layer limiting platform 10, thereby causing the double-layer limiting platform 10 to move radially, which in turn compresses the spring 9 and drives multiple sets of clamping rods 13 to rotate synchronously, thereby causing the clamping rods 13 to clamp inward, so that the clamping member 14 applies a uniform radial clamping force from the outer wall of the housing, fixing the housing at the center position of the rotating cylinder 7, providing a stable reference for subsequent welding;

[0072] After the housing is externally clamped, the first motor 16 is started, which drives the rotating rod 20 to rotate through the bevel gear transmission. This drives multiple sets of transmission blocks 21 to extend radially in sync, so that the top block 22 presses against the inner wall of the housing, thereby achieving centering and positioning of the inner hole of the housing and forming a double clamping with the external clamping member 14.

[0073] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0074] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0075] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding auxiliary tooling for welding the housing of a large cycloidal motor, comprising a workbench (1), a control device (2) fixedly connected to the outside of the workbench (1), and a guide rail (3) fixedly connected to the inside of the workbench (1). characterized in that The workbench (1) is provided with two external clamping components on its top. The external clamping components include a support platform (4) fixedly connected to the top of the workbench (1). One of the support platforms (4) has a roller (5) fixedly connected to its bottom. The outer side of the roller (5) is slidably connected to the inside of the guide rail (3). The support platform (4) is fixedly connected to a positioning cylinder (6), the positioning cylinder (6) is rotatably connected to a rotating cylinder (7), the rotating cylinder (7) is fixedly connected to a positioning disk (8), the positioning disk (8) is fixedly connected to a spring (9) on the outside, and the end of the spring (9) is fixedly connected to a double-layer limiting platform (10). The double-layer limiting platform (10) is fixedly connected to the outside of a first rotating seat (11). There are two first rotating seats (11). A pull rod (12) is rotatably connected inside the first rotating seat (11). The second first rotating seat (11) is fixedly connected to the end of the pull rod (12). A clamping rod (13) is rotatably connected inside the second pull rod (12). A second rotating seat (15) is rotatably connected to the outside of one end of the clamping rod (13), and a clamping member (14) is rotatably connected to the outside of the other end. The second rotating seat (15) is fixedly connected to the outside of the rotating cylinder (7).

2. A welding auxiliary tool for tailor welding of a large cycloid motor housing according to claim 1, characterized in that: The double-layer limiting platform (10) is provided with an internal limiting component. The internal limiting component includes a first motor (16) fixedly connected inside the double-layer limiting platform (10). The transmission end of the first motor (16) is fixedly connected to a first transmission rod (17). The end of the first transmission rod (17) is rotatably connected to the inside of the double-layer limiting platform (10). A first bevel gear (18) is fixedly connected to the outside of the first transmission rod (17).

3. A welding aid for tailor welding a large cycloidal motor housing according to claim 2, characterized in that: The internal limiting assembly also includes a second bevel gear (19) meshing with the outside of the first bevel gear (18). A rotating rod (20) is fixedly connected to the outside of the second bevel gear (19). The end of the rotating rod (20) is rotatably connected to the inside of the double-layer limiting platform (10). A transmission block (21) is driven to the outside of the rotating rod (20). A top block (22) is fixedly connected to the end of the transmission block (21). The transmission block (21) passes through the double-layer limiting platform (10) and is slidably connected.

4. A welding auxiliary tool for tailor welding of a large cycloid motor housing according to claim 1, characterized in that: A rotating assembly is provided on the outside of the support platform (4). The rotating assembly includes a back plate (25) fixedly connected to the outside of the support platform (4). A connecting ring (26) is fixedly connected to the outside of the back plate (25). The outside of the connecting ring (26) is slidably connected to the inside of the rotating cylinder (7). A second motor (27) is fixedly connected to the outside of the back plate (25). A second transmission rod (28) is fixedly connected to the transmission end of the second motor (27). The end of the second transmission rod (28) is rotatably connected to the outside of the positioning plate (8). A first gear (29) is fixedly connected to the outside of the second transmission rod (28).

5. A welding aid for tailor welding a large cycloidal motor housing according to claim 4, characterized in that: The rotating assembly also includes a second gear (30) meshing with the outside of the first gear (29). A third transmission rod (31) is fixedly connected inside the second gear (30). One end of the third transmission rod (31) is rotatably connected to the outside of the back plate (25), and the other end is rotatably connected to a rotating ring (33). A gear ring (32) meshes with the outside of the second gear (30). The gear ring (32) is fixedly connected inside the rotating cylinder (7). The outside of the rotating ring (33) is slidably connected to the inside of the positioning disk (8).

6. A welding aid for tailor welding a large cycloidal motor housing according to claim 1, characterized in that: The top of the workbench (1) is provided with a pushing assembly, which includes a support plate (34) fixedly connected to the top of the workbench (1). A hydraulic rod (35) is fixedly connected inside the support plate (34). A cross plate (36) is fixedly connected to the end of the hydraulic rod (35). A connecting rod (37) is fixedly connected to the outside of the cross plate (36). The end of the connecting rod (37) is fixedly connected to the outside of the back plate (25).

7. The welding auxiliary tooling for welding the housing of a large cycloidal motor according to claim 6, characterized in that: The pushing assembly also includes two upright plates (23) fixedly connected to the top of the workbench (1), and a slide rod (24) fixedly connected between the two upright plates (23). The outer side of the slide rod (24) is slidably connected to the inside of the support platform (4).

8. The welding auxiliary tooling for welding the housing of a large cycloidal motor according to claim 1, characterized in that: The workbench (1) is equipped with a collection component, which includes a collection box (38) that is slidably connected to the inside of the workbench (1). A handle (39) is fixedly connected to the outside of the collection box (38), and a caster wheel (40) is fixedly connected to the bottom of the collection box (38).

9. A welding auxiliary fixture for welding the housing of a large cycloidal motor according to claim 1, characterized in that: The guide rail (3) has a groove inside, and the outer side of the double-layer limiting platform (10) is slidably connected to the inside of the rotating cylinder (7).

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