A stator lamination anti-deflection welding tooling

Abstract

The present invention belongs to the technical field of stator lamination processing, and specifically discloses a stator lamination anti-deflection welding tooling, which includes a working turntable. A stepping motor is coaxially and fixedly arranged on the upper side of the working turntable. Three rotating arms are fixedly arranged on the circumferential side of the output end of the stepping motor in an array. A ring support is vertically fixedly arranged at one end of the rotating arm. A tray is coaxially and fixedly arranged on the upper side of the ring support. A bearing cover body is coaxially and fixedly arranged on the upper side of the tray. A circumferential high-efficiency roughing mechanism is arranged on the upper part of the bearing cover body. A radial extrusion circumferential calibration mechanism is arranged below the circumferential high-efficiency roughing mechanism. Along the circumferential direction, a lamination conveyor belt, a welding assembly and a stator conveyor belt fixedly connected to the ground are arranged at equal angles on the outer side of the working turntable. The present invention can integrate processes such as lamination stamping, stacking and finishing, and welding and forming, simplify the production process, adopt a two-stage alignment mechanism of rough adjustment and fine calibration, and the control mechanism automatically adjusts the position of the lamination to make it reach the required alignment accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of stator lamination processing, and specifically refers to a stator lamination anti-deflection welding tooling. Background Art

[0002] The stator is an important component of an electric motor, and its production and processing directly affect the performance and quality of the motor. The stator core is usually stacked by multiple silicon steel laminations with specific geometric shapes to reduce eddy current losses. The manufacturing process of the stator generally includes lamination stamping, that is, using a high-precision stamping die to stamp into stator laminations, and these laminations usually contain notches for winding insertion. Lamination stacking, that is, stacking the stamped laminations according to the design requirements to form a complete stator core. Lamination welding, that is, the stacked laminations need to be welded to ensure that they do not loosen or deform during the operation of the motor. Subsequent processing, including processes such as wire insertion and varnish impregnation. In the stator manufacturing process, the alignment and positioning before lamination welding are crucial for the quality of the final product. However, there are many problems in the existing lamination welding tooling technology.

[0003] In the traditional stator manufacturing process, lamination stamping, stacking arrangement, and welding are separate processes, and it is necessary to transport the laminations between different workstations. The multiple transports of the laminations increase the production time and labor costs, and during the transport process, the laminations are prone to collision, deformation, or misalignment and deflection, affecting the subsequent welding quality. At the same time, the separate processes require more production equipment and sites, increasing the production costs.

[0004] In order to ensure the welding quality and motor performance, the laminations need to be precisely radially and circumferentially aligned before welding. Radial alignment means ensuring that the radial positions of each lamination are the same, avoiding misalignment or uneven lamination, which affects the concentricity of the stator core. Circumferential alignment means ensuring that the slot openings on the inner side of each lamination are aligned circumferentially, avoiding slot misalignment, which affects winding insertion and motor performance. The existing alignment methods mainly rely on manual operation, with low efficiency. The manual alignment speed is slow, and it is easily affected by the subjective factors of the operator, making it difficult to ensure the alignment accuracy. At the same time, manual alignment requires a large amount of labor, increasing the production costs.

[0005] Some automatic alignment devices attempt to solve the problems of low efficiency and unstable precision in manual alignment. One solution is to sleeved the laminations on the positioning shaft and use the vertical clamping parts below to support them in suspension. The positioning shaft drives the laminations to rotate through friction. When the slot on the lamination coincides with the clamping part, the clamping part releases the lamination, allowing it to fall freely, thus achieving alignment. However, such devices also have many defects. Since there must be a gap between the clamping part and the slot to ensure the free fall of the lamination, this gap causes the slots of different laminations not to fully match, resulting in deviations. To ensure that all laminations can rotate with the positioning shaft, a large amount of friction needs to be applied. However, too much friction will cause the lamination to be unable to fall freely smoothly when passing through the clamping part, and human force or an additional mechanism needs to be set up to assist the lamination in sliding down, increasing costs additionally. Summary of the Invention

[0006] In view of the above situation, the present invention provides a stator lamination anti-deflection welding tooling, which can integrate processes such as stamping, stacking and sorting, and welding and forming of laminations, simplify the production process, realize automated production, adopt a two-stage alignment mechanism of rough adjustment and fine alignment, and the control mechanism automatically adjusts the position of the laminations to achieve the required alignment accuracy, thereby overcoming the defects in traditional alignment devices and realizing the efficient production of stators.

[0007] The technical solution adopted by the present invention is as follows: The present invention provides a stator lamination anti-deflection welding tooling, including a working turntable. A stepping motor is coaxially and fixedly arranged on the upper side of the working turntable. Three rotating arms are fixedly arranged in a circumferential array on the side of the output end of the stepping motor. A ring support is vertically fixedly arranged at one end of the rotating arm. A tray is coaxially and fixedly arranged on the upper side of the ring support. A bearing cover is coaxially and fixedly arranged on the upper side of the tray. A circumferential high-efficiency rough alignment mechanism is arranged on the upper part of the bearing cover. A radial extrusion circumferential calibration mechanism is arranged below the circumferential high-efficiency rough alignment mechanism. Along the circumferential direction, a lamination conveyor belt, a welding assembly and a stator conveyor belt fixedly connected to the ground are arranged at equal angles on the outside of the working turntable. During the rotation of the rotating arm, it sequentially passes through the lamination conveyor belt, the welding assembly and the stator conveyor belt.

[0008] Furthermore, the bearing cover includes a hollow column, which is coaxially and fixedly arranged on the upper side of the tray. A positioning column is coaxially and fixedly arranged on the upper side of the hollow column. The inside of the positioning column is of a hollow structure. The outer diameter of the positioning column is larger than the outer diameter of the hollow column. The lower end of the positioning column is horizontally and hermetically connected to the upper end of the hollow column. A circular chamfer is arranged at the edge of the upper end of the positioning column to facilitate the passing of the lamination. The center of the upper end of the positioning column is horizontally arranged.

[0009] Furthermore, the circumferential high-efficiency rough finishing mechanism includes a DC motor and a limiting hole. The DC motor is coaxially and fixedly arranged at the upper end inside the positioning column. The output end of the DC motor faces vertically downward. A horizontal bevel gear is coaxially and fixedly arranged at the output end of the DC motor. The horizontal bevel gear is in close contact with the connecting section of the positioning column and the hollow column below it, so that the horizontal bevel gear will not tilt during rotation. The limiting holes are circumferentially arrayed and penetrate through the side wall of the positioning column. The limiting holes point to the axis of the positioning column. The number of the limiting holes is a divisor of the number of the wire embedding grooves on the laminated sheet, so that each limiting hole can be directly opposite to the wire embedding grooves on the laminated sheet. A roller is rotatably and tightly clamped in the limiting hole. A vertical bevel gear is coaxially and fixedly arranged at one end of the roller inside the positioning column. The vertical bevel gear is vertically meshed and connected with the horizontal bevel gear. A rubber texture layer is arranged on the side surface of the part of the roller outside the positioning column, which can increase the friction with the laminated sheet.

[0010] Furthermore, the radial extrusion circumferential calibration mechanism includes a strip hole and a rotating shaft. The strip holes are circumferentially arrayed and vertically penetrate through the side wall of the hollow column. The strip holes point to the axis of the hollow column. The number of the strip holes is the same as the number of the limiting holes. The strip holes are directly below the adjacent limiting holes. A slide plate is slidably and tightly arranged in the strip hole. A notch is opened in the middle of the part of the slide plate inside the hollow column. A sliding column is vertically and fixedly arranged at a position close to the axis of the hollow column on the notch of the slide plate. A rotating disc is horizontally and tightly slidably arranged in the notch. The rotating disc is coaxially arranged with the hollow column inside the hollow column. Arc-shaped holes are circumferentially arrayed and penetrate through the surface of the rotating disc. The sliding column is in close contact with and slidably arranged in the arc-shaped holes. An arc plate is fixedly arranged at one end of the slide plate outside the hollow column. A clamping sharp edge is vertically fixedly arranged in the middle of the outer arc surface of the arc plate. The clamping sharp edge is directly below the adjacent rollers. The rotating shaft vertically and tightly penetrates through the center positions of the ring support and the tray. The rotating shaft is circumferentially fixedly arranged with the ring support. A contact head is coaxially and fixedly arranged at the lower end of the rotating shaft. The contact head is hemispherical. A compression spring is sleeved on the outside of the rotating shaft between the contact head and the ring support, which can always generate a downward pressure on the contact head. The two ends of the compression spring are respectively fixedly connected with the contact head and the ring support. Spiral chutes are symmetrically opened on the side of the upper end of the rotating shaft. A circular hole is penetrated through the center position of the rotating disc. Slide ridges are symmetrically fixedly arranged in the circular hole of the rotating disc. The upper end of the rotating shaft extends into the circular hole, and the slide ridges are in close contact with and slidably arranged in the spiral chutes.

[0011] Furthermore, the radial extrusion circumferential calibration mechanism includes a low-position slide, a high-position slide and a transition slide, the low-position slide, the high-position slide and the transition slide are fixedly arranged on the upper edge of the working circular platform, the low-position slide and the high-position slide are relatively arranged, the transition slide is symmetrically arranged between the two ends of the low-position slide and the high-position slide, the low-position slide, the transition slide and the high-position slide form a complete ring in vertical projection, the high-position slide and the low-position slide are horizontally arranged, the top surface of the high-position slide is higher than the top surface of the low-position slide, the two ends of the transition slide are smoothly connected to the low-position slide and the high-position slide respectively, and the top surface of the transition slide is a smooth inclined surface.

[0012] Furthermore, the diameter of the tray is smaller than the outer diameter of the stack, which makes it convenient to pick up the stack. The diameter of the cylinder formed by the roller and the rubber texture layer on its surface is smaller than the minimum width of the wire-embedded groove on the stack. The outer diameter of the positioning column is smaller than the diameter of the center positioning hole on the stack. The length of the outer end of the roller from the axis of the positioning column is smaller than the length of the outer end of the wire-embedded groove on the stack from the axis of the stack, so that the stack can fall and pass through the roller. The length of the outer end of the roller from the axis of the positioning column is greater than the radius of the center positioning hole on the stack, so that the stack can be blocked by the roller. The outer diameter of the cylinder formed when each arc plate is tightly attached to the adjacent arc plates is less than or equal to the outer diameter of the positioning column. The length of the tip of the positioning spike from the axis of the hollow column is less than the length of the outer end of the roller from the axis of the positioning column, so that the stack can continue to fall freely after passing through the roller. The root width of the positioning spike is equal to the width of the inner end of the wire-embedded groove on the stack.

[0013] Furthermore, the contact contacts with the low-position slide, the transition slide and the high-position slide during the process of rotating around the stepping motor. When the rotating shaft moves upward, the sliding cooperation between the sliding ridge and the spiral slide groove can drive the turntable to rotate and the cooperation between the sliding column and the arc hole can expand the arc plate outward. When the contact contacts with the low-position slide, each arc plate is tightly attached to the adjacent arc plate. When the contact contacts with the high-position slide, the two edges of the root of each positioning sharp ridge are tightly attached to the two edges of the inner end of the wire embedding groove on the laminate.

[0014] Furthermore, the upper end surface of the stacking conveyor belt and the horizontal plane of the upper end of the positioning column are at the same horizontal height, so that when the stacking is not unstable, it can be pushed by the stacking conveyor belt to partially reach the upper end of the positioning column and be completely covered on the positioning column by inertia. The welding assembly is opposite to the middle of the high-position slide, and the stacking conveyor belt and the stator conveyor belt are respectively opposite to the two edge positions of the low-position slide.

[0015] Furthermore, a proximity sensor is fixedly provided on the outer side of the low-level slide at a position opposite to the stacking conveyor belt, and the sensing end of the proximity sensor is arranged upward. The tray is made of metal material and is easily identified by the proximity sensor. After the proximity sensor detects whether there is a metal object above, it sends a signal to the microcontroller of the adjacent DC motor to turn on and off the DC motor.

[0016] Further, the stepper motor is configured to stop for the same period of time after each 120-degree rotation through a motor drive unit and a programmable logic control unit. When the stepper motor stops, the rotating arm is respectively facing the lamination conveyor belt, the welding assembly, and the stator conveyor belt. The stop time of the stepper motor each time is longer than the single welding time of the welding assembly.

[0017] The beneficial effects achieved by the present invention with the above structure are as follows:

[0018] (1) The present invention can integrate processes such as lamination stamping, stacking and sorting, and welding forming, and enables simultaneous lamination sorting, welding, and storage, greatly simplifying the production process. During the working process, the lamination conveyor belt continuously conveys laminations to the positioning posts. The circumferential high-efficiency rough sorting mechanism preliminarily sorts the laminations. Subsequently, the radial extrusion circumferential calibration mechanism performs precise calibration. Finally, welding is completed at the welding assembly. At the same time, the welded stator is conveyed to the stator conveyor belt. The entire process runs automatically without manual intervention, significantly improving production efficiency. During the welding of the laminations, the arc plate always abuts against the central positioning hole of the lamination, and the two edges at the root of the clamping sharp edges are always in close contact with the two inner edges of the embedded wire grooves on the lamination, ensuring the radial and circumferential positioning of the lamination during the welding process, effectively avoiding the deflection of the lamination during welding, and improving the welding quality.

[0019] (2) The circumferential high-efficiency rough sorting mechanism drives the rotation of the laminations through the rotation of the roller. By reasonably setting the size of the roller, the laminations can pass through the roller and fall, realizing the preliminary sorting of the laminations. In addition, by reasonably setting the size of the clamping sharp edges and the relative position of the arc plate, it is ensured that the laminations can continue to fall after passing through the roller, avoiding the situation where the laminations are stuck on the positioning posts and the arc plate, overcoming the defect of easy jamming of traditional alignment devices, and further improving work efficiency.

[0020] (3) The radial extrusion circumferential calibration mechanism gradually adjusts the position of the lamination through the precise linkage of components such as the contact head, transition slide, rotating shaft, sliding rib, turntable, arc-shaped hole, sliding column, sliding plate, arc plate, and clamping sharp edges, avoiding damage to the lamination that may be caused by violent correction. The sliding of the contact head on the transition slide drives the rotating shaft to move upward, and then drives the arc plate to gradually expand outward. During the process, the clamping sharp edges gradually penetrate into the embedded wire groove and finally fit tightly with the inner end of the embedded wire groove, realizing the precise alignment of the lamination in the radial and circumferential directions. This process is completely automated, avoiding errors caused by manual alignment operations, with higher alignment accuracy and better product consistency.

[0021] (4) The present invention ingeniously utilizes the combination of the low-position slide, the transition slide, and the high-position slide, enabling the precise alignment process to be synchronized with the lamination transfer. When the laminations to be welded are precisely aligned, the stator that has been welded is under the action of the downwardly inclined transition slide, and the binding force gradually decreases. Finally, when it reaches the stator conveyor belt, it is completely released, thus enabling it to be smoothly removed. This design avoids the additional correction time and the process of releasing the stator constraint, shortens the production cycle, further improves the production efficiency, and at the same time, this structure does not require additional power drive and can be completed only by the mechanical linkage between components. It has a simple structure, accurate principle, is safe and reliable, and has low production and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a perspective structural view of a stator lamination anti-deflection welding tooling proposed by the present invention.

[0023] Figure 2 FIG. is a front view of a stator lamination anti-deflection welding tooling proposed by the present invention.

[0024] Figure 3 FIG. is a top view of a stator lamination anti-deflection welding tooling proposed by the present invention.

[0025] Figure 4 is Figure 1 an enlarged view of part A in

[0026] Figure 5 is Figure 4 an enlarged view of part B in

[0027] Figure 6 is Figure 2 an enlarged view of part C in

[0028] Figure 7 FIG. is an exploded structural view of the positional relationship between the bearing housing and the circumferential high-efficiency roughing mechanism of a stator lamination anti-deflection welding tooling proposed by the present invention.

[0029] Figure 8 is Figure 7 an enlarged view of part D in

[0030] Figure 9 FIG. is a top view of the positioning post and the circumferential high-efficiency roughing mechanism of a stator lamination anti-deflection welding tooling proposed by the present invention.

[0031] Figure 10 is Figure 9 a cross-sectional view taken along line E-E in

[0032] Figure 11 FIG. is a front view of the positioning post and the circumferential high-efficiency roughing mechanism of a stator lamination anti-deflection welding tooling proposed by the present invention.

[0033] Figure 12 is Figure 11 the F-F sectional view in

[0034] Figure 13 the top view of the positional relationship between the roller and the laminations of a stator lamination anti-deflection welding tooling proposed by the present invention.

[0035] Figure 14 is Figure 13 the enlarged view of part G in

[0036] Figure 15 the top view of the positional relationship between the clamping sharp edges and the laminations when the laminations of a stator lamination anti-deflection welding tooling proposed by the present invention are completely aligned.

[0037] Wherein, 1, working turntable; 11, proximity sensor; 2, stepping motor; 3, rotating arm; 31, ring support; 32, tray; 4, bearing cover; 41, hollow column; 42, positioning column; 5, circumferential high-efficiency roughing mechanism; 51, DC motor; 52, horizontal bevel gear; 53, vertical bevel gear; 54, roller; 55, limiting hole; 6, radial extrusion circumferential calibration mechanism; 61, slotted hole; 62, slide plate; 621, notch; 622, sliding column; 63, arc plate; 631, clamping sharp edge; 64, turntable; 641, round hole; 642, sliding rib; 643, arc-shaped hole; 65, rotating shaft; 651, contact; 652, spiral chute; 66, compression spring; 67, low-level slide; 68, high-level slide; 69, transition slide; 7, lamination conveyor belt; 8, welding assembly; 9, stator conveyor belt.

[0038] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0041] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 shown, the present invention provides a stator lamination anti-deflection welding tooling, including a working turntable 1. A stepping motor 2 is coaxially and fixedly arranged on the upper side of the working turntable 1. Three rotating arms 3 are fixedly arranged on the circumferential side of the output end of the stepping motor 2 in an array. One end of the rotating arm 3 is vertically fixedly provided with a ring support 31. A tray 32 is coaxially and fixedly arranged on the upper side of the ring support 31. A bearing cover 4 is coaxially and fixedly arranged on the upper side of the tray 32. A circumferential high-efficiency roughing mechanism 5 is arranged on the upper part of the bearing cover 4. A radial extrusion circumferential calibration mechanism 6 is arranged below the circumferential high-efficiency roughing mechanism 5. Along the circumferential direction, a lamination conveyor belt 7, a welding assembly 8 and a stator conveyor belt 9 fixedly connected to the ground are arranged at equal angles on the outside of the working turntable 1. During the rotation of the rotating arm 3, it sequentially passes through the lamination conveyor belt 7, the welding assembly 8 and the stator conveyor belt 9.

[0042] Among them, the bearing cover 4 includes a hollow column 41. The hollow column 41 is coaxially and fixedly arranged on the upper side of the tray 32. A positioning column 42 is coaxially and fixedly arranged on the upper side of the hollow column 41. The inside of the positioning column 42 is of a hollow structure. The outer diameter of the positioning column 42 is larger than the outer diameter of the hollow column 41. The lower end of the positioning column 42 is horizontally and hermetically connected to the upper end of the hollow column 41. A circular chamfer is arranged at the edge of the upper end of the positioning column 42. The center of the upper end of the positioning column 42 is horizontally arranged. The circumferential high-efficiency roughing mechanism 5 includes a DC motor 51 and a limiting hole 55. The DC motor 51 is coaxially and fixedly arranged at the upper end inside the positioning column 42. The output end of the DC motor 51 is vertically downward. A horizontal bevel gear 52 is coaxially and fixedly arranged at the output end of the DC motor 51. The horizontal bevel gear 52 is in close contact with the connecting section of the positioning column 42 and the hollow column 41 below it. The limiting holes 55 are arranged in a circumferential array and penetrate through the side wall of the positioning column 42. The limiting holes 55 point to the axis of the positioning column 42. The number of the limiting holes 55 is a divisor of the number of the embedded wire grooves on the lamination. A roller 54 is rotatably and closely engaged in the limiting hole 55. One end of the roller 54 located inside the positioning column 42 is coaxially and fixedly provided with a vertical bevel gear 53. The vertical bevel gear 53 is vertically meshed and connected with the horizontal bevel gear 52. A rubber texture layer is arranged on the side surface of the part of the roller 54 located outside the positioning column 42.

[0043] Among them, the radial extrusion circumferential calibration mechanism 6 includes a strip hole 61 and a rotating shaft 65. The strip holes 61 are arranged in a circumferential array and vertically penetrate through the side wall of the hollow column 41. The strip holes 61 point to the axis of the hollow column 41. The number of strip holes 61 is the same as the number of limit holes 55. The strip holes 61 are located directly below the adjacent limit holes 55. A slide plate 62 is slidably arranged in the strip hole 61 in a close-fitting manner. A notch 621 is formed in the middle of the part of the slide plate 62 located inside the hollow column 41. A slide post 622 is vertically fixed at a position close to the axis of the hollow column 41 on the notch 621 of the slide plate 62. A turntable 64 is slidably arranged in the notch 621 in a horizontal and close-fitting manner. The turntable 64 is coaxially arranged with the hollow column 41 inside the hollow column 41. Arc-shaped holes 643 are formed in a circumferential array and penetrate through the surface of the turntable 64. The slide post 622 is slidably arranged in the arc-shaped hole 643 in a close-fitting manner with the turntable 64. One end of the slide plate 62 outside the hollow column 41 is fixed with an arc plate 63. A clamping sharp edge 631 is vertically fixed in the middle of the outer arc surface of the arc plate 63. The clamping sharp edge 631 is located directly below the adjacent roller 54. The rotating shaft 65 vertically penetrates through the axis positions of the ring support 31 and the tray 32 in a close-fitting manner. The rotating shaft 65 is fixedly arranged in a circumferential direction with the ring support 31. A contact head 651 is coaxially fixed at the lower end of the rotating shaft 65. The contact head 651 is hemispherical. A compression spring 66 is sleeved outside the rotating shaft 65 between the contact head 651 and the ring support 31. The two ends of the compression spring 66 are respectively fixedly connected with the contact head 651 and the ring support 31. Spiral chute 652 is symmetrically formed on the upper end side of the rotating shaft 65. A circular hole 641 is formed through the axis position of the turntable 64. Slide ridges 642 are symmetrically fixed in the circular hole 641 of the turntable 64. The upper end of the rotating shaft 65 extends into the circular hole 641. The slide ridges 642 are slidably arranged in a close-fitting manner with the spiral chute 652.

[0044] Among them, the radial extrusion circumferential calibration mechanism 6 includes a low-level slide 67, a high-level slide 68 and a transition slide 69. The low-level slide 67, the high-level slide 68 and the transition slide 69 are fixedly arranged on the upper side edge of the working turntable 1. The low-level slide 67 and the high-level slide 68 are arranged oppositely. The transition slide 69 is symmetrically arranged between the two ends of the low-level slide 67 and the high-level slide 68. The low-level slide 67, the transition slide 69 and the high-level slide 68 form a complete ring in the vertical projection. The high-level slide 68 and the low-level slide 67 are horizontally arranged. The top surface of the high-level slide 68 is higher than the top surface of the low-level slide 67. The two ends of the transition slide 69 are respectively smoothly connected with the low-level slide 67 and the high-level slide 68. The top surface of the transition slide 69 is a smooth inclined surface.

[0045] Among them, the diameter of the tray 32 is smaller than the outer diameter of the laminated sheet. The diameter of the cylinder formed by the roller 54 and the rubber texture layer on its surface is smaller than the minimum width of the wire embedding groove on the laminated sheet. The outer diameter of the positioning post 42 is smaller than the diameter of the central positioning hole on the laminated sheet. The length from the outer end of the roller 54 to the axis of the positioning post 42 is smaller than the length from the outer end of the wire embedding groove on the laminated sheet to the axis of the laminated sheet. The length from the outer end of the roller 54 to the axis of the positioning post 42 is greater than the radius of the central positioning hole on the laminated sheet. The outer diameter of the cylinder formed by each arc plate 63 when it is in close contact with the adjacent arc plate 63 is less than or equal to the outer diameter of the positioning post 42. The length from the tip of the clamping sharp edge 631 to the axis of the hollow post 41 is smaller than the length from the outer end of the roller 54 to the axis of the positioning post 42. The root width of the clamping sharp edge 631 is equal to the inner end width of the wire embedding groove on the laminated sheet.

[0046] Among them, during the rotation of the contact 651 around the stepping motor 2, it is in contact with the low-level slide 67, the transition slide 69, and the high-level slide 68. When the rotating shaft 65 moves upward, through the sliding cooperation between the sliding rib 642 and the spiral chute 652, it can drive the turntable 64 to rotate, and through the cooperation between the sliding post 622 and the arc-shaped hole 643, the arc plate 63 expands outward. When the contact 651 is in contact with the low-level slide 67, each arc plate 63 is in close contact with the adjacent arc plate 63. When the contact 651 is in contact with the high-level slide 68, the two edges at the root of each clamping sharp edge 631 are in close contact with the two edges at the inner end of the wire embedding groove on the laminated sheet. The upper surface of the laminated sheet conveyor belt 7 and the horizontal plane at the upper end of the positioning post 42 are at the same horizontal height. The welding assembly 8 is directly opposite the middle of the high-level slide 68. The laminated sheet conveyor belt 7 and the stator conveyor belt 9 are respectively directly opposite the two edge positions of the low-level slide 67.

[0047] Among them, a proximity sensor 11 is fixedly installed at a position on the outer side of the low-level slide 67 directly opposite the laminated sheet conveyor belt 7. The sensing end of the proximity sensor 11 faces upward. The tray 32 is made of a metal material. After the proximity sensor 11 detects whether there is a metal object above, it sends a signal to the microcontroller of the adjacent DC motor 51 to turn on and off the DC motor 51. The stepping motor 2 rotates 120 degrees each time through the motor drive unit and the programmable logic control unit and then stops for the same time. When the stepping motor 2 stops, the rotating arms 3 are respectively directly opposite the laminated sheet conveyor belt 7, the welding assembly 8, and the stator conveyor belt 9. The stop time of the stepping motor 2 each time is greater than the single welding time of the welding assembly 8.

[0048] During specific use, the laminated belt 7 conveys the stator laminations formed by stamping in the upstream process. By reasonably setting the stamping period, the number of continuously conveyed laminations each time can just stack into a complete stator. Driven by the laminated belt 7, part of the laminations reach the upper end of the positioning post 42. Under the continuous pushing of the laminated belt 7 and inertial drive, the laminations can reach directly above the positioning post 42 and then fall freely, and are blocked by the roller 54. Since this is the stop period of the stepping motor 2, the rotating arm 3 and the tray 32 are stationary. The proximity sensor 11 detects the tray 32 directly above and sends a corresponding signal to the microcontroller of the adjacent DC motor 51 to turn on the DC motor 51. Controlling the switch of the DC motor 51 by the proximity sensor 11 is an existing conventional technology, so its specific principle will not be elaborated here. The DC motor 51 drives the horizontal bevel gear 52, which in turn drives all the vertical bevel gears 53 to rotate. The roller 54 rotates and realizes the circumferential rotation of the upper laminations through the rubber texture layer on its surface. When the slot of the lamination coincides with the roller 54, by reasonably setting the size of the roller 54, the lamination can pass through the roller 54 and fall freely. And at this time, since the contact 651 is in contact with the low slide 67, the arc plate 63 is in a tightened state. By reasonably setting the size of the clamping sharp edge 631, the lamination can fall to the lowest point, and at this time, the tip part of the clamping sharp edge 631 is located in the slot of the lamination. Until all the laminations required for a stator are stacked together, the laminated belt 7 stops conveying the laminations.

[0049] Since there is a certain gap between the roller 54 and the slot on the falling laminations, it is not certain that the slots can be accurately aligned when each lamination passes through the roller 54. At this time, after the stator laminations at the welding assembly 8 are completely welded, the stepping motor 2 starts under the control of the motor drive unit and the programmable logic control unit, and continues to rotate 120 degrees and then stops. Controlling the rotation angle and timing of the stepping motor 2 through the motor drive unit and the programmable logic control unit is an existing conventional technology, so its specific principle will not be elaborated here. During the 120-degree rotation of the stepping motor 2 this time, the proximity sensor 11 cannot sense the metal object above and thus sends a signal to turn off the adjacent DC motor 51, while the radial extrusion circumferential calibration mechanism 6 will play a role in further aligning the laminations. The principle is as follows: The contact 651 corresponding to the preliminarily aligned laminations moves from the low-position slide 67 to the upwardly inclined transition slide 69. At this time, the transition slide 69 will resist the contact 651 and move upward against the pressure of the compression spring 66, driving the rotating shaft 65 to move upward. The rotating shaft 65 is circumferentially fixed to the ring support 31 so that the rotating shaft 65 will not rotate. When the rotating shaft 65 moves upward, the position of the spiral chute 652 on the same horizontal plane changes. Therefore, it can drive the sliding rib 642 and then drive the turntable 64 to rotate. When the turntable 64 rotates, the arc-shaped hole 643 will rotate. Since under the limitation of the strip hole 61, the sliding column 622 can only move radially with the hollow column 41, during the rotation of the arc-shaped hole 643, the inner end of the arc-shaped hole 643 will move away from the sliding column 622, causing the sliding column 622, the sliding plate 62, the arc plate 63 and the clamping sharp edge 631 to move away from the axis of the hollow column 41. As the arc plate 63 expands outward, the central positioning holes of the laminations are gradually aligned, and the clamping sharp edge 631 gradually penetrates into the slot. The inclined surface of the clamping sharp edge 631 will contact the inner end edge of the slot and gradually correct the circumferential direction of the laminations until the contact 651 touches the high-position slide 68. At this time, the outward expansion distance of the arc plate 63 reaches the maximum. At this time, all the arc plates 63 resist the central positioning holes of the laminations, achieving the radial alignment of the laminations. At the same time, the two edges at the root of all the clamping sharp edges 631 are closely attached to the two inner edges of the slots on the laminations, achieving the alignment of the slots on the laminations, thus completely aligning the stator laminations and stopping at the welding assembly 8 position to start welding.

[0050] During this process, the welded stator away from the welding assembly 8 is also moving on the downwardly inclined transition slide 69. Under the pressure of the compression spring 66, the contact 651 and the rotating shaft 65 gradually return downward, causing the arc plate 63 and the clamping sharp edge 631 to gradually tighten until it moves to the position of the stator conveyor belt 9. At this time, the contact 651 contacts the low-position slide 67, and the arc plate 63 is completely tightened and no longer restricts the stator, enabling the operator to easily pick up the stator and place it on the stator conveyor belt 9 to enter the next process.

[0051] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

[0053] The above description of the present invention and its embodiments is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In general, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A stator lamination anti-deflection welding tool, comprising a working truncated table (1), characterized in that: A stepper motor (2) is coaxially fixedly provided on the upper side of the working truncated table (1); three rotating arms (3) are fixedly provided in a circumferential array on the side of the output end of the stepper motor (2); a ring bracket (31) is vertically fixedly provided on one end of the rotating arm (3); a tray (32) is coaxially fixedly provided on the upper side of the ring bracket (31); a bearing cover (4) is coaxially fixedly provided on the upper side of the tray (32); a circumferential efficient roughing mechanism (5) is provided on the upper part of the bearing cover (4); a radial extrusion circumferential calibration mechanism (6) is provided below the circumferential efficient roughing mechanism (5); a lamination conveyor belt (7), a welding assembly (8) and a stator conveyor belt (9) are provided at equal angles along the circumferential direction on the outer side of the working truncated table (1) and are fixedly connected to the ground; during the rotation process of the rotating arm (3), the lamination conveyor belt (7), the welding assembly (8) and the stator conveyor belt (9) are sequentially passed through; The bearing cover (4) comprises a hollow column (41), the hollow column (41) being coaxially fixed on the upper side of the tray (32), and a positioning column (42) being coaxially fixed on the upper side of the hollow column (41); The circumferential efficient roughing mechanism (5) comprises a DC motor (51) and a limiting hole (55), wherein the DC motor (51) is coaxially fixedly arranged at the upper end of the interior of the positioning column (42), and the limiting holes (55) are arranged in a circumferential array and penetrate through the side wall of the positioning column (42), and a roller (54) is tightly engaged and rotatably arranged in the limiting hole (55), and a rubber texture layer is arranged on the side surface of a portion of the roller (54) located outside the positioning column (42); The radial extrusion circumferential calibration mechanism (6) comprises strip holes (61) and a rotating shaft (65). The strip holes (61) are arranged in a circumferential array and vertically penetrate the side wall of the hollow column (41). The strip holes (61) point to the axis of the hollow column (41). The number of the strip holes (61) is the same as the number of the limiting holes (55). The strip holes (61) are located directly below the adjacent limiting holes (55). A slide plate (62) is tightly slidably provided in the strip holes (61). A notch ( 621), the slide plate (62) is vertically fixed with a slide column (622) at a position close to the axis of the hollow column (41) on the slot (621), a turntable (64) is horizontally and tightly slidably arranged in the slot (621), the turntable (64) is coaxially arranged with the hollow column (41) inside the hollow column (41), and a circular array of arc holes (643) is formed on the surface of the turntable (64), the slide column (622) slides tightly with the turntable (64) in the arc holes (643), and the slide plate (62) is arranged in the hollow column (41). An arc plate (63) is fixedly provided at one end outside the ring support (31), a positioning sharp ridge (631) is vertically fixedly provided at the middle of the outer arc surface of the arc plate (63), the positioning sharp ridge (631) is located directly below the adjacent roller (54), the rotating shaft (65) is vertically and closely connected to the axis position of the ring support (31) and the tray (32), the rotating shaft (65) and the ring support (31) are fixedly arranged in the circumferential direction, a contact (651) is coaxially fixedly provided at the lower end of the rotating shaft (65), the contact (651) is hemispherical, and the outer side of the rotating shaft (65) is at the contact (651). A compression spring (66) is sleeved between the ring support (31), and the two ends of the compression spring (66) are fixedly connected to the contact (651) and the ring support (31) respectively. A spiral slide groove (652) is symmetrically provided at the upper end of the rotating shaft (65). A circular hole (641) is provided through the axis of the rotating disk (64). The rotating disk (64) is symmetrically fixed with sliding ribs (642) in the circular hole (641). The upper end of the rotating shaft (65) extends into the circular hole (641), and the sliding ribs (642) and the spiral slide groove (652) are tightly slidably arranged. The radial extrusion circumferential calibration mechanism (6) comprises a low-position slide (67), a high-position slide (68) and a transition slide (69), wherein the low-position slide (67), the high-position slide (68) and the transition slide (69) are fixedly arranged on the upper edge of the working circular table (1), the low-position slide (67) and the high-position slide (68) are arranged opposite to each other, and the transition slide (69) is symmetrically arranged between the two ends of the low-position slide (67) and the high-position slide (68). The low slide (67), the transition slide (69) and the high slide (68) form a complete ring in vertical projection, the high slide (68) and the low slide (67) are arranged horizontally, the top surface of the high slide (68) is higher than the top surface of the low slide (67), the two ends of the transition slide (69) are smoothly connected to the low slide (67) and the high slide (68), and the top surface of the transition slide (69) is a smooth inclined surface; The diameter of the tray (32) is smaller than the outer diameter of the laminate, the diameter of the cylinder formed by the roller (54) and the rubber texture layer on its surface is smaller than the minimum width of the wire embedding groove on the laminate, the outer diameter of the positioning column (42) is smaller than the diameter of the central positioning hole on the laminate, the length from the outer end of the roller (54) to the axis of the positioning column (42) is smaller than the length from the outer end of the wire embedding groove on the laminate to the axis of the laminate, the length from the outer end of the roller (54) to the axis of the positioning column (42) is greater than the radius of the central positioning hole on the laminate, the outer diameter of the cylinder formed when each arc plate (63) is tightly attached to the adjacent arc plate (63) is smaller than or equal to the outer diameter of the positioning column (42), the length from the tip of the positioning spike (631) to the axis of the hollow column (41) is smaller than the length from the outer end of the roller (54) to the axis of the positioning column (42), and the root width of the positioning spike (631) is equal to the width of the inner end of the wire embedding groove on the laminate; The contact (651) contacts the low-position slide (67), the transition slide (69) and the high-position slide (68) during the process of rotating around the stepper motor (2). When the rotating shaft (65) moves upward, the sliding cooperation between the sliding ridge (642) and the spiral slide groove (652) can drive the rotating disk (64) to rotate, and the cooperation between the sliding column (622) and the arc hole (643) causes the arc plate (63) to expand outward. When the contact (651) contacts the low-position slide (67), each arc plate (63) is in close contact with the adjacent arc plate (63). When the contact (651) contacts the high-position slide (68), the two edges at the root of each positioning sharp ridge (631) are in close contact with the two edges at the inner end of the wire embedding groove on the laminate.

2. The stator lamination anti-deflection welding tool according to claim 1, characterized in that: The interior of the positioning column (42) is a hollow structure, the outer diameter of the positioning column (42) is larger than the outer diameter of the hollow column (41), the lower end of the positioning column (42) is horizontally sealed and connected to the upper end of the hollow column (41), the upper edge of the positioning column (42) is provided with a round chamfer, and the center of the upper end of the positioning column (42) is horizontally arranged.

3. The stator lamination anti-deflection welding tool according to claim 2, characterized in that: The output end of the DC motor (51) faces vertically downward, and a horizontal bevel gear (52) is coaxially fixedly provided at the output end of the DC motor (51). The horizontal bevel gear (52) is tightly attached to the connecting section of the positioning column (42) and the hollow column (41) located below the horizontal bevel gear (52). The limiting hole (55) points to the axis of the positioning column (42). The number of the limiting holes (55) is an approximate multiple of the number of wire embedding grooves on the laminate. A vertical bevel gear (53) is coaxially fixedly provided at one end of the roller (54) located inside the positioning column (42). The vertical bevel gear (53) is vertically meshed and connected with the horizontal bevel gear (52).

4. The stator lamination anti-deflection welding tool according to claim 3, characterized in that: The upper end surface of the lamination conveyor belt (7) and the upper end horizontal plane of the positioning column (42) are at the same level, the welding assembly (8) is opposite to the middle of the high-position slide (68), and the lamination conveyor belt (7) and the stator conveyor belt (9) are opposite to the two edge positions of the low-position slide (67) respectively.

5. The stator lamination anti-deflection welding tool according to claim 4, characterized in that: A proximity sensor (11) is fixedly provided on the outer side of the low-position slide (67) at a position directly opposite to the stacking conveyor belt (7), and the sensing end of the proximity sensor (11) is arranged upward. The tray (32) is made of a metal material. After the proximity sensor (11) detects whether there is a metal object above, it sends a signal to the microcontroller of the adjacent DC motor (51) to turn on and off the DC motor (51).

6. The stator lamination anti-deflection welding tool according to claim 5, characterized in that: The stepper motor (2) is implemented by a motor drive unit and a programmable logic control unit to stop for the same period of time after each rotation of 120 degrees; when the stepper motor (2) stops, the rotating arm (3) is respectively facing the lamination conveyor belt (7), the welding assembly (8) and the stator conveyor belt (9); and the stop time of the stepper motor (2) each time is greater than the single welding time of the welding assembly (8).

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