Frameless motor stator round welding structure

Abstract

The utility model relates to the field of block stator assembly equipment, specifically discloses a frameless motor stator round welding structure, including main installation base plate, rotation round assembly, lift drive assembly and welding execution component. Rotation round assembly is vertically worn in main installation base plate, contains the rotation main part that can revolve around vertical axis and the expansion sleeve assembly that is sleeved on it, can be outwardly tight stator inner wall to realize round positioning, lift drive assembly is located below main installation base plate, is transmission connection with rotation main part lower end, drives rotation round assembly whole lifting, welding execution component horizontal sliding is located in main installation base plate top surface, and the working end is towards stator welding station. The utility model solves the problem of low positioning precision, poor roundness consistency, easy deformation of stator and low processing efficiency of existing frameless motor stator welding round, realizes accurate round of stator and circumferential continuous welding, compact structure, positioning is stable, effectively promotes welding quality and processing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of segmented stator assembly equipment, specifically a frameless motor stator circular welding structure. Background Technology

[0002] Frameless motors are widely used due to their advantages such as compact structure, low moment of inertia, fast response speed, and high transmission accuracy. As the core component of a frameless motor, the roundness accuracy of its inner circle directly determines the uniformity of the motor's air gap, which in turn has a critical impact on the motor's running stability, electromagnetic noise, output torque fluctuation, and overall service life.

[0003] Currently, frameless motor stators generally employ a manufacturing process involving the splicing and welding of segmented silicon steel sheet cores. The welding process requires using a rounding fixture to support and fix the spliced ​​stator core to the target roundness before circumferential welding at the core joints. Existing stator rounding welding fixtures often employ a single-segment fixed expansion sleeve structure, relying on manual or single-cylinder drive for tensioning and positioning. This approach has several shortcomings in actual production. First, single-stage expansion sleeves can only apply tension force to a single axial position of the stator, resulting in poor roundness consistency at both ends of the stator core and a tendency for taper deformation. This makes it difficult for the overall roundness of the stator after welding to meet high-precision assembly requirements. Second, existing tooling has low functional integration. Functional units such as tensioning and positioning, lifting and driving, welding feed, and fume treatment are arranged independently, resulting in a large overall equipment footprint, cumbersome process connections, low production efficiency, and difficulty in ensuring coaxiality and positional matching accuracy between units. Third, the lack of precise pressure feedback and stroke limit mechanisms makes it easy for pressure overload to occur during tensioning and pressing, causing plastic deformation of the stator core or misalignment of silicon steel sheets. At the same time, the support and guide structure for lifting and rotating movements is simple, resulting in rapid wear and significant attenuation of positioning accuracy after long-term operation. Fourth, the adjustability of the welding station is poor, making it difficult to quickly adapt to stator products with different inner diameters and heights. It lacks versatility, and the high-temperature fumes generated during welding cannot be discharged in a timely and directional manner, affecting the visibility of the welding area and harming the cleanliness of the working environment and the health of personnel.

[0004] Therefore, there is an urgent need for a frameless motor stator round welding structure with high integration, good round positioning accuracy, stable and reliable operation, and strong adaptability, in order to solve the problems of poor stator welding roundness consistency, dispersed equipment functions, low processing efficiency, and insufficient product yield in the existing technology. Utility Model Content

[0005] This utility model addresses the aforementioned problems in the prior art by providing a frameless motor stator circular welding structure, which effectively solves the problems of poor stator welding roundness consistency, dispersed equipment functions, low processing efficiency, and insufficient product yield in the prior art, thereby improving processing efficiency and product yield.

[0006] To achieve the above objectives, this utility model proposes a frameless motor stator circular welding structure, including a main mounting base plate, a rotating circular assembly, a lifting drive assembly, and a welding execution assembly; The main mounting base is a horizontally arranged plate-shaped substrate, and the rotary circular assembly is vertically inserted through the mounting holes of the main mounting base. The rotary circular assembly includes a rotating body that rotates around a vertical axis and an expansion sleeve assembly fitted onto the rotating body. The lifting drive assembly is located below the main mounting base and is connected to the lower end of the rotating body for driving the rotary circular assembly to move vertically. The welding execution assembly is horizontally slidably disposed on the top surface of the main mounting base, with its working end facing the stator welding station of the rotary circular assembly, for completing the stator welding operation. A protective baffle is also fixedly disposed on the top surface of the main mounting base, and the protective baffle is arranged vertically and surrounds the outer periphery of the rotary circular assembly.

[0007] Preferably, the expansion sleeve assembly includes a first expansion sleeve assembly and a second expansion sleeve assembly, which are sequentially fitted from top to bottom along the axial direction of the rotating body; the inner holes of the first expansion sleeve assembly and the second expansion sleeve assembly are both fixed to the rotating body circumferentially by keys, which are used to expand and tighten the inner wall of the stator to achieve roundness shaping and positioning of the stator; a motor assembly is fixed on the top surface of the main mounting base plate, and the output end of the motor assembly is connected to the rotating body for driving the rotating body to rotate around its own vertical axis.

[0008] Preferably, the lifting drive assembly includes an active frame, a servo cylinder, a floating joint, a joint connecting block, a follower plate, and a connecting shaft; the active frame is a vertical fixed frame, and the servo cylinder is vertically fixedly installed at the bottom crossbeam of the active frame; the upper end of the output rod of the servo cylinder is connected to the joint connecting block through the floating joint, and the joint connecting block is fixedly installed on the lower surface of the follower plate; the follower plate is horizontally arranged inside the active frame, and the connecting shaft is arranged vertically, with its lower end fixedly connected to the follower plate and its upper end coaxially fixedly connected to the lower end of the rotating body; when the servo cylinder extends and retracts, it drives the entire rotating circular assembly to move up and down vertically through the follower plate and the connecting shaft.

[0009] Preferably, the upper part of the active frame is provided with a bearing support unit, which includes a bearing housing, a deep groove ball bearing, an angular contact ball bearing, a first bearing pressure plate, and a second bearing pressure plate. The bearing housing is fixedly installed on the top crossbeam of the active frame. The deep groove ball bearing and the angular contact ball bearing are sequentially installed axially in the inner hole of the bearing housing, forming a rotational support for the connecting shaft. The first bearing pressure plate and the second bearing pressure plate are respectively fixedly connected to the upper and lower end faces of the bearing housing, and are used to axially limit the deep groove ball bearing and the angular contact ball bearing.

[0010] Preferably, the active frame is further provided with a pressure sensor and a pressure sensing control display; the pressure sensor is disposed between the follower plate and the connecting shaft, and is used to detect the pressure value during the stator clamping process; the pressure sensing control display is fixedly installed on the outer wall of the active frame and electrically connected to the pressure sensor, and is used to display the pressure value in real time and output a pressure control signal. The upper part of the active frame is also equipped with an ultra-thin cylinder. The piston rod end of the ultra-thin cylinder is set towards the connecting shaft or the rotating body, and is used to extend and press after being tightened and positioned in place, to help lock the rotation position. A vertical guide unit is provided between the active frame and the follower plate. The vertical guide unit includes multiple flanged linear bearings and multiple guide shafts. Each flanged linear bearing is fixedly installed on the top crossbeam of the active frame. Each guide shaft is vertically inserted into the inner hole of the corresponding flanged linear bearing. The lower end of the guide shaft is fixedly connected to the follower plate, and the upper end extends upward in the vertical direction.

[0011] Preferably, a limit shaft is vertically mounted on the follower plate to mechanically limit the upward stroke of the follower plate; a photoelectric sensor is fixed to the side wall of the active frame to detect the lifting position of the follower plate; a magnetic switch is installed on the side wall of the servo cylinder to detect the extension and retraction position of the servo cylinder piston.

[0012] Preferably, a dust extraction hood is provided below the main mounting base plate, the dust extraction hood is located on the upper part of the active frame and covers the lower outer periphery of the rotating body; the air outlet of the dust extraction hood is connected to a high-temperature resistant corrugated pipe for discharging welding fumes; the active frame is also provided with an SMC direct connector for connecting to an external compressed air circuit.

[0013] Preferably, the welding execution component includes a linear motion module, a slider pad, and a welding mounting bracket; the linear motion module is horizontally fixed to the top surface of the main mounting base plate and includes a first KK module, a second KK module, and a linear slide rail arranged in parallel with each other; the bottom of the welding mounting bracket is fixedly connected to the sliders of the first KK module, the second KK module, and the linear slide rail respectively through the slider pad, and is driven by the linear motion module to reciprocate in the horizontal direction; The welding mounting frame includes a first fixing plate, a vertical plate, a fixing component, a reinforcing rib, and a second mounting plate; the first fixing plate is horizontally fixed to the top surface of the slider pad, the vertical plate is vertically fixed to the top surface of the first fixing plate, the reinforcing rib connects the top surface of the first fixing plate and the side surface of the vertical plate, and the second mounting plate is fixed to the upper part of the vertical plate; a universal magnetic air blowing pipe is installed on the second mounting plate, with its nozzle end facing the stator welding station.

[0014] Preferably, the main mounting base plate is further provided with a first drag chain fixing plate, a second drag chain fixing plate, a first drag chain, and a second drag chain; the first drag chain and the second drag chain are both arranged along the movement direction of the linear motion module, one end of each drag chain is fixed to the main mounting base plate through the first drag chain fixing plate and the second drag chain fixing plate respectively, and the other end is connected to the welding mounting frame through the drag chain plate, for storing and protecting the moving pipeline; a scale strip is also fixed on the main mounting base plate, and a pointer plate is correspondingly provided on the welding mounting frame for indicating the horizontal movement position of the welding mounting frame.

[0015] Preferably, the motor assembly includes a servo motor, a servo motor brake, and a coupling; the servo motor is mounted vertically on the top surface of the main mounting base, the servo motor brake is fitted to the servo motor, and its output shaft is connected to the upper part of the rotating body through the coupling, for outputting rotational power to the rotating body and locking the rotational position.

[0016] Therefore, this utility model proposes a frameless motor stator circular welding structure, the beneficial effects of which are as follows: (1) The double-segment expansion sleeve is used in conjunction with the rotating body to form a circular structure. The stator is uniformly expanded at multiple points along the axial direction, which effectively ensures the uniformity of the inner circle of the stator, reduces welding deformation, and significantly improves the positioning accuracy of the stator in forming a circle.

[0017] (2) The functions of circular rotation, lifting drive, welding feed and fume treatment are integrated and arranged in a compact and highly integrated manner, which simplifies the process connection and effectively improves the production efficiency of stator welding processing.

[0018] (3) Equipped with precise guide support, pressure detection and adjustable welding station, it runs smoothly and is reliable in positioning. It can adapt to the processing of stators of different specifications, reduce the risk of stator damage and effectively improve the product processing yield.

[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of a frameless motor stator circular welding structure according to this utility model; Figure 2 This is a schematic diagram of the assembly structure of a rotating circular component for a frameless motor stator circular welding structure according to this utility model; Figure 3 This is a schematic diagram of a lifting drive assembly with a frameless motor stator circular welding structure according to this utility model. Figure 3 (a) in the diagram is a front sectional view of the structure. Figure 3 (b) in the diagram is a side view of the structure; Figure 4 This is a schematic diagram of a welding mounting frame structure for a frameless motor stator circular welding structure according to this utility model; Figure 5 This is a side view of the welding execution component of a frameless motor stator circular welding structure according to this utility model; Figure 6 This is a schematic diagram of a rotating drive assembly with a frameless motor stator circular welding structure according to this utility model; Figure 7 This is a schematic diagram of a linear motion module with a frameless motor stator circular welding structure according to the present invention.

[0021] Figure Labels 1. Main mounting base plate; 2. Protective baffle; 3. Rotating body; 4. Motor assembly; 5. First expansion sleeve assembly; 6. Second expansion sleeve assembly; 7. Key; 8. Active frame; 9. Floating joint; 10. First mounting plate; 11. Follower plate; 12. Joint connecting block; 13. First connecting block; 14. First connecting plate; 15. First adjusting block; 16. Wiring board; 17. Wiring guide plate; 18. Connecting shaft; 19. Bearing seat; 20. First bearing pressure plate; 21. Second bearing pressure plate; 22. Limiting shaft; 23. Dust extraction hood; 24. Second connecting block; 25. Second connecting plate; 26. Mounting shaft; 27. Mounting block; 28. Photoelectric sensor; 29. ​​Servo electric cylinder; 30. Deep groove ball bearing; 31. Angular contact ball bearing; 32. Ultra-thin cylinder; 33. Pressure sensor control display; 4. Pressure sensor; 35. Magnetic switch; 36. Flange-mounted linear bearing; 37. High-temperature resistant bellows; 38. Positioning pin; 39. SMC direct head; 40. First fixing plate; 41. Vertical plate; 42. Fixing component; 43. Reinforcing rib; 44. Second mounting plate; 45. First cable chain fixing plate; 46. Cable chain plate; 47. Gasket; 48. Second fixing plate; 49. Second cable chain fixing plate; 50. Second adjusting block; 51. Slider pad; 52. Third mounting plate; 53. First KK module; 54. Second KK module; 55. Scale strip; 56. First cable chain; 57. Second cable chain; 58. Coupling; 59. Pointer plate; 60. First universal magnetic air suction tube; 61. Second universal magnetic air suction tube; 62. Servo motor brake; 63. Servo motor; 64. Linear guide rail. Detailed Implementation

[0022] To make the technical solution, advantages, and objectives of this utility model clearer, the technical solution of the embodiments of this utility model will be clearly and completely described below. The described embodiments are some, but not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0023] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0024] like Figures 1-7 As shown, this utility model provides a frameless motor stator circular welding structure, including a main mounting base plate 1, a rotation circular assembly, a lifting drive assembly, a welding execution assembly, and protective and supporting auxiliary components.

[0025] The main mounting base 1 is a horizontally arranged plate-shaped support base, which serves as the mounting reference for all functional components of the machine. Each assembly component is precisely positioned and locked to the corresponding position on the main mounting base 1 by means of positioning pins 38.

[0026] The rotating circular component is vertically inserted through the central mounting hole of the main mounting base plate 1. The welding execution component and the protective structure are respectively assembled on the top surface of the main mounting base plate 1. The lifting drive component is arranged below the main mounting base plate 1.

[0027] The rotating circular assembly includes a rotating body 3, an expansion sleeve assembly, and a motor assembly 4, which are used to realize the expansion and circularization of the inner wall of the stator and the circumferential rotation drive.

[0028] The expansion sleeve assembly includes a first expansion sleeve assembly 5 and a second expansion sleeve assembly 6, which are sequentially fitted from top to bottom along the axial direction of the rotating body 3. The inner holes of the first expansion sleeve assembly 5 and the second expansion sleeve assembly 6 are fixed to the rotating body 3 circumferentially by keys 7, and can rotate synchronously with the rotating body 3. During operation, they expand outward to tighten the inner wall of the stator, thereby completing the roundness shaping and positioning of the stator.

[0029] The motor assembly 4 is fixed to the top surface of the main mounting base plate 1 and includes a servo motor 63, a servo motor brake 62 and a coupling 58. The servo motor 63 is arranged vertically, and the servo motor brake 62 is fitted to the servo motor 63. Its output shaft is connected to the upper part of the rotating body 3 through the coupling 58 to output rotational power to the rotating body 3, driving the rotating body 3 to rotate continuously around its own vertical axis. The brake structure can lock the rotation position when the machine stops to prevent the stator from shifting.

[0030] The lifting drive assembly is located below the main mounting base plate 1 and is connected to the lower end of the rotating body 3 for driving the rotating circular assembly to move up and down in the vertical direction.

[0031] The lifting drive assembly includes an active frame 8, a servo electric cylinder 29, a floating joint 9, a joint connecting block 12, a follower plate 11, a connecting shaft 18, a bearing support unit, a pressure detection unit, a vertical guide unit, and auxiliary locking components.

[0032] The active frame 8 is a vertical fixed frame, and its top is aligned and fixed with the lower surface of the main mounting base plate 1 through the first mounting plate 10, serving as the overall mounting base of the lifting drive assembly; the servo electric cylinder 29 is vertically fixedly installed at the bottom crossbeam of the active frame 8, and the upper end of its output rod is connected to the connector connecting block 12 through the floating joint 9. The connector connecting block 12 is fixedly installed on the lower surface of the follower plate 11.

[0033] The follower plate 11 is horizontally arranged inside the active frame 8, and the connecting shaft 18 is arranged vertically. Its lower end is fixedly connected to the follower plate 11. The connection is reinforced and assembled with the first connecting plate 14 through the first connecting block 13 to improve the torsional rigidity of the connection structure. The upper end of the connecting shaft 18 is coaxially fixedly connected to the lower end of the rotating body 3.

[0034] When the servo electric cylinder 29 performs telescopic movement, it drives the rotating circular assembly to complete the lifting and lowering action in the vertical direction through the follower plate 11 and the connecting shaft 18. The follower plate 11 is also equipped with a first adjusting block 15, which is used to fine-tune the upper limit stroke in conjunction with the limit structure.

[0035] The side wall of the active frame 8 is equipped with a cable tray 16 and a cable guide plate 17 to organize the power cables and signal cables inside the equipment and prevent the cables from interfering and wearing during the lifting and lowering movement.

[0036] The bearing support unit is located on the upper part of the active frame 8 and includes a bearing housing 19, a deep groove ball bearing 30, an angular contact ball bearing 31, a first bearing pressure plate 20, and a second bearing pressure plate 21.

[0037] After the bearing housing 19 is precisely positioned and bolted to the top crossbeam of the active frame 8 by the locating pin 38, the deep groove ball bearing 30 and the angular contact ball bearing 31 are sequentially installed axially in the inner hole of the bearing housing 19, together forming a rotational support for the connecting shaft 18 and ensuring the coaxiality of the connecting shaft 18 during rotation and lifting. The first bearing pressure plate 20 and the second bearing pressure plate 21 are respectively fixedly connected to the upper and lower end faces of the bearing housing 19, forming an axial limit for the two types of bearings.

[0038] The upper part of the active frame 8 is also equipped with an ultra-thin cylinder 32, which extends to assist in tightening the corresponding part of the rotating body 3 after the tensioning and positioning are in place, further improving the positioning stability during the welding process and preventing radial movement during the rotation.

[0039] The pressure detection unit includes a pressure sensor 34 and a pressure sensing control display 33. The pressure sensor 34 is located between the follower plate 11 and the connecting shaft 18 and is used to detect the pressure value during the stator expansion and compression process in real time.

[0040] The pressure sensor control display 33 is fixedly installed on the outer wall of the active frame 8 and electrically connected to the pressure sensor 34. It is used to display the pressure value in real time and output the pressure control signal to avoid stator deformation caused by pressure overload.

[0041] The vertical guide unit is located between the active frame 8 and the follower plate 11, and includes multiple flanged linear bearings 36 and multiple guide shafts. Each flanged linear bearing 36 is fixedly installed on the top crossbeam of the active frame 8, and each guide shaft is vertically inserted into the inner hole of the corresponding flanged linear bearing 36. The lower end of the guide shaft is fixedly connected to the follower plate 11, and the upper end extends upward in the vertical direction, providing precise guidance for the lifting and lowering movement of the follower plate 11.

[0042] A limit shaft 22 is vertically installed on the follower plate 11 to mechanically limit the upward stroke of the follower plate 11; the side wall of the active frame 8 is fixed with a mounting shaft 26 through the second connecting block 24 and the second connecting plate 25; the mounting block 27 is adjustablely mounted on the mounting shaft 26; the photoelectric sensor 28 is fixedly installed on the mounting block 27 and can be adjusted along the mounting shaft 26 to detect the lifting position of the follower plate 11 and adapt to different lifting stroke settings; a magnetic switch 35 is installed on the side wall of the servo electric cylinder 29 to detect the extension and retraction position of the servo electric cylinder piston; multiple limits ensure accurate and controllable lifting stroke.

[0043] The welding execution assembly is horizontally slidably mounted on the top surface of the main mounting base plate 1, with its working end facing the stator welding station of the rotating circular assembly, for completing the circumferential welding operation of the stator. The welding execution assembly includes a linear motion module, a slider pad 51, and a welding mounting bracket.

[0044] The linear motion module is horizontally fixed to the top surface of the main mounting base plate 1, and includes a first KK module 53, a second KK module 54, and a linear slide rail 64 arranged in parallel with each other. A second adjusting block 50 is installed at the end of the linear motion module to limit the horizontal movement limit of the welding mounting bracket.

[0045] The bottom of the welding mounting frame is fixedly connected to the sliders of the first KK module 53, the second KK module 54, and the linear guide rail 64 via slider pads 51. Driven by a linear motion module, it reciprocates horizontally to accommodate stator welding requirements of different inner diameters. A shim 47 is placed between the slider pad 51 and the welding mounting frame to adjust the overall installation height of the welding mounting frame and ensure the levelness of the welding station.

[0046] The welding mounting frame includes a first fixing plate 40, a vertical plate 41, a fastener 42, a reinforcing rib 43, a second mounting plate 44, a second fixing plate 48, and a third mounting plate 52.

[0047] The first fixing plate 40 is horizontally fixed to the top surface of the slider pad 51, and the upright plate 41 is vertically fixed to the top surface of the first fixing plate 40. A reinforcing rib 43 connects the top surface of the first fixing plate 40 and the side surface of the upright plate 41 to strengthen the rigidity of the frame structure. The second mounting plate 44 is fixed to the upper part of the upright plate 41, and the third mounting plate 52 is adjustablely mounted on the second mounting plate 44 for mounting welding actuators and fine-tuning the pitch angle of the welding head. The second mounting plate 44 also has a first universal magnetic suction pipe 60 and a second universal magnetic suction pipe 61 installed, with the nozzle end facing the stator welding station for directional blowing of the welding area. The second fixing plate 48 is mounted on the side of the upright plate 41 for fixing the drag chain connection structure.

[0048] The main mounting base plate 1 is also provided with a first drag chain fixing plate 45, a second drag chain fixing plate 49, a first drag chain 56, and a second drag chain 57. The first drag chain 56 and the second drag chain 57 are both arranged along the movement direction of the linear moving module. One end of each drag chain is fixed to the main mounting base plate 1 through the first drag chain fixing plate 45 and the second drag chain fixing plate 49, respectively. The other end of each drag chain is connected to the second fixing plate 48 of the welding mounting frame through the drag chain plate 46, which is used to store and protect the moving pipeline of the welding execution component.

[0049] The main mounting base plate 1 is also fixed with a scale band 55, and a pointer plate 59 is correspondingly provided on the welding mounting bracket to visually indicate the horizontal movement position of the welding mounting bracket, which facilitates position adjustment and specification switching.

[0050] The protective and auxiliary components include a protective baffle 2, a dust extraction hood 23, a high-temperature resistant corrugated pipe 37, and an SMC direct connector 39. The protective baffle 2 is fixedly installed on the top surface of the main mounting base plate 1, arranged vertically, and surrounds the outer periphery of the rotated circular assembly, serving as a welding isolation and protection function.

[0051] A dust extraction hood 23 is positioned below the main mounting base plate 1 and above the active frame 8, covering the lower outer periphery of the rotating body 3. The exhaust port of the dust extraction hood 23 is connected to a high-temperature resistant bellows 37 for directional discharge of high-temperature fumes generated during welding. An SMC direct connector 39 is also provided on the active frame 8 for connecting to an external compressed air circuit, providing an air source for the air circuit components and the purging structure.

[0052] The workflow of this structure is divided into five stages: workpiece loading and assembly, lifting and tightening to form a circle, welding station adjustment, continuous circumferential welding, and resetting and unloading. Each component works in concert to complete the circular welding process of the frameless motor stator, as detailed below: (1) Workpiece loading and assembly stage: The assembled stator core to be welded is fitted from above onto the outside of the expansion sleeve assembly that is rotated into a circular component, so that the inner wall of the stator is initially attached to the outer surface of the first expansion sleeve assembly 5 and the second expansion sleeve assembly 6, thus completing the initial fitting and positioning of the workpiece.

[0053] (2) The stage of rising, tightening, and forming a circle: The servo electric cylinder 29 of the lifting drive component is activated. The output rod retracts, driving the follower plate 11, the connecting shaft 18 and the rotating rounding component to move downward as a whole. The expansion sleeve component expands outward as the rotating body 3 moves downward, and the expansion force is applied synchronously from the upper and lower axial positions of the stator inner wall to complete the roundness shaping and precise positioning of the stator.

[0054] Pressure sensor 34 monitors the tensioning pressure in real time. When the set value is reached, servo cylinder 29 stops moving. Ultra-thin cylinder 32 extends to assist in locking the rotating body 3. Limit shaft 22, first adjusting block 15 and photoelectric sensor 28 work together to ensure precise control of the lifting stroke. Magnetic switch 35 provides synchronous feedback on the position of cylinder piston.

[0055] (3) Welding station adjustment stage: According to the inner diameter specifications of the stator to be welded and the welding position, the linear motion module is driven to move, which in turn moves the welding mounting frame horizontally. The feed position is confirmed by the pointer plate 59 and the scale 55. The second adjusting block 50 limits the movement limit so that the welding working end on the third mounting plate 52 is aligned with the welding joint of the stator. The blowing angle of the first universal magnetic suction pipe 60 and the second universal magnetic suction pipe 61 is adjusted so that they are aligned with the welding area. After the installation height is finely adjusted by the shim 47, it is locked and fixed to complete the debugging of the welding station.

[0056] (4) Circumferential continuous welding stage: After the workstation is debugged, the welding execution component starts the welding operation; at the same time, the servo motor 63 starts, the servo motor brake 62 is unlocked, and the rotating body 3 is driven to rotate synchronously and uniformly with the stator through the coupling 58 to achieve continuous circumferential welding of the stator joint; during the welding process, the first universal magnetic suction pipe 60 and the second universal magnetic suction pipe 61 continuously blow the welding area, the dust extraction hood 23 discharges welding fumes through the high temperature resistant corrugated pipe 37, the protective baffle 2 isolates the welding arc light and spatter, and the cable tray 16 and the cable guide plate 17 ensure that the cable moves smoothly without interference.

[0057] (5) Reset and unloading stage: After all welding processes on the stator are completed, the welding execution component stops working and returns to its initial position. The servo motor 63 stops rotating, and the servo motor brake 62 locks the rotation position. The ultra-thin cylinder 32 retracts to release the auxiliary locking, and the servo electric cylinder 29 extends to drive the rotating circular component to move upward as a whole. The expansion sleeve component retracts to release the expansion limit on the stator. The finished stator with welding completed is removed, and a new workpiece can be placed to enter the next cycle of operation.

[0058] Therefore, this utility model provides a frameless motor stator rounding welding structure, which solves the technical problems of low positioning accuracy, poor roundness consistency, insufficient functional integration, low processing efficiency and weak adaptability of existing stator rounding welding fixtures. It achieves uniform axial expansion of the stator through a double-segment expansion sleeve, ensuring rounding accuracy. It integrates rotary rounding, lifting drive, adjustable welding feed and fume treatment functions, with a compact structure and stable operation, effectively improving stator welding quality and processing efficiency, and adapting to the processing needs of stators of various specifications.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A frameless motor stator round welding structure, characterized in that, This includes the main mounting base plate, the rotation into a circle assembly, the lifting drive assembly, and the welding execution assembly; The main mounting base is a horizontally arranged plate-shaped substrate, and the rotary circular assembly is vertically inserted through the mounting holes of the main mounting base. The rotary circular assembly includes a rotating body that rotates around a vertical axis and an expansion sleeve assembly fitted onto the rotating body. The lifting drive assembly is located below the main mounting base and is connected to the lower end of the rotating body for driving the rotary circular assembly to move vertically. The welding execution assembly is horizontally slidably disposed on the top surface of the main mounting base, with its working end facing the stator welding station of the rotary circular assembly, for completing the stator welding operation. A protective baffle is also fixedly disposed on the top surface of the main mounting base, and the protective baffle is arranged vertically and surrounds the outer periphery of the rotary circular assembly.

2. The frameless motor stator circular welding structure according to claim 1, characterized in that, The expansion sleeve assembly includes a first expansion sleeve assembly and a second expansion sleeve assembly, which are sequentially fitted from top to bottom along the axial direction of the rotating body. The inner holes of the first expansion sleeve assembly and the second expansion sleeve assembly are fixed to the rotating body circumferentially by keys, which are used to expand and tighten the inner wall of the stator to achieve roundness shaping and positioning of the stator. A motor assembly is fixed on the top surface of the main mounting base plate, and the output end of the motor assembly is connected to the rotating body for driving the rotating body to rotate around its own vertical axis.

3. A frameless motor stator round weld structure according to claim 1, characterized in that, The lifting drive assembly includes an active frame, a servo cylinder, a floating joint, a joint connecting block, a follower plate, and a connecting shaft. The active frame is a vertical fixed frame, and the servo cylinder is vertically fixedly installed at the bottom crossbeam of the active frame. The upper end of the output rod of the servo cylinder is connected to the joint connecting block through the floating joint, and the joint connecting block is fixedly installed on the lower surface of the follower plate. The follower plate is horizontally arranged inside the active frame, and the connecting shaft is arranged vertically, with its lower end fixedly connected to the follower plate and its upper end coaxially fixedly connected to the lower end of the rotating body. When the servo cylinder extends and retracts, it drives the entire rotating circular assembly to move up and down vertically through the follower plate and the connecting shaft.

4. The frameless motor stator circular welding structure according to claim 3, characterized in that, The upper part of the active frame is provided with a bearing support unit, which includes a bearing housing, a deep groove ball bearing, an angular contact ball bearing, a first bearing pressure plate, and a second bearing pressure plate. The bearing housing is fixedly installed on the top crossbeam of the active frame. The deep groove ball bearing and the angular contact ball bearing are sequentially installed axially in the inner hole of the bearing housing, forming a rotational support for the connecting shaft. The first bearing pressure plate and the second bearing pressure plate are respectively fixedly connected to the upper and lower end faces of the bearing housing, and are used to axially limit the deep groove ball bearing and the angular contact ball bearing.

5. The frameless motor stator circular welding structure according to claim 3, characterized in that, The active frame is also equipped with a pressure sensor and a pressure sensing control display; the pressure sensor is located between the follower plate and the connecting shaft and is used to detect the pressure value during the stator clamping process; the pressure sensing control display is fixedly installed on the outer wall of the active frame and electrically connected to the pressure sensor, and is used to display the pressure value in real time and output the pressure control signal. The upper part of the active frame is also equipped with an ultra-thin cylinder. The piston rod end of the ultra-thin cylinder is set towards the connecting shaft or the rotating body, and is used to extend and press after being tightened and positioned in place, to help lock the rotation position. A vertical guide unit is provided between the active frame and the follower plate. The vertical guide unit includes multiple flanged linear bearings and multiple guide shafts. Each flanged linear bearing is fixedly installed on the top crossbeam of the active frame. Each guide shaft is vertically inserted into the inner hole of the corresponding flanged linear bearing. The lower end of the guide shaft is fixedly connected to the follower plate, and the upper end extends upward in the vertical direction.

6. The frameless motor stator circular welding structure according to claim 3, characterized in that, A limit shaft is vertically installed on the follower plate to mechanically limit the upward stroke of the follower plate; a photoelectric sensor is fixed on the side wall of the active frame to detect the lifting position of the follower plate; a magnetic switch is installed on the side wall of the servo cylinder to detect the extension and retraction position of the servo cylinder piston.

7. The frameless motor stator circular welding structure according to claim 3, characterized in that, A dust extraction hood is provided below the main mounting base plate. The dust extraction hood is located on the upper part of the active frame and covers the lower outer periphery of the rotating body. The air outlet of the dust extraction hood is connected to a high-temperature resistant corrugated pipe for discharging welding fumes. An SMC direct connector is also provided on the active frame for connecting to an external compressed air circuit.

8. A frameless motor stator round weld structure according to claim 1, characterized in that, The welding execution component includes a linear motion module, a slider pad, and a welding mounting bracket; the linear motion module is horizontally fixed to the top surface of the main mounting base plate and includes a first KK module, a second KK module, and a linear slide rail arranged in parallel with each other; the bottom of the welding mounting bracket is fixedly connected to the sliders of the first KK module, the second KK module, and the linear slide rail respectively through the slider pad, and is driven by the linear motion module to reciprocate in the horizontal direction; The welding mounting frame includes a first fixing plate, a vertical plate, a fixing component, a reinforcing rib, and a second mounting plate; the first fixing plate is horizontally fixed to the top surface of the slider pad, the vertical plate is vertically fixed to the top surface of the first fixing plate, the reinforcing rib connects the top surface of the first fixing plate and the side surface of the vertical plate, and the second mounting plate is fixed to the upper part of the vertical plate; a first universal magnetic suction pipe and a second universal magnetic suction pipe are installed on the second mounting plate, and the nozzle ends of both pipes face the stator welding station.

9. A frameless motor stator round weld structure according to claim 8, characterized in that, The main mounting base plate is also provided with a first drag chain fixing plate, a second drag chain fixing plate, a first drag chain, and a second drag chain; the first drag chain and the second drag chain are both arranged along the movement direction of the linear motion module, one end of each drag chain is fixed to the main mounting base plate through the first drag chain fixing plate and the second drag chain fixing plate respectively, and the other end is connected to the welding mounting frame through the drag chain plate for storing and protecting the moving pipeline; a scale strip is also fixed on the main mounting base plate, and a pointer plate is correspondingly provided on the welding mounting frame for indicating the horizontal movement position of the welding mounting frame.

10. A frameless motor stator circular welding structure according to claim 2, characterized in that, The motor assembly includes a servo motor, a servo motor brake, and a coupling. The servo motor is mounted vertically on the top surface of the main mounting base. The servo motor brake is fitted to the servo motor, and its output shaft is connected to the upper part of the rotating body via the coupling to output rotational power to the rotating body and lock the rotational position.

Images