Motor stator punching sheet lamination welding device

Abstract

The invention discloses a motor stator punching sheet lamination welding device, and belongs to the technical field of motor manufacturing, the motor stator punching sheet lamination welding device comprises two lifting units, a pressing unit, two axial limiting units and a clamping groove unit, the two lifting units are symmetrically arranged on a rack and used for supporting a stator punching sheet in the radial direction of the stator punching sheet; the downward pressing unit is used for limiting upward movement of the stator punching sheet; the two axial limiting units are used for abutting against the two ends of the stacked stator punching sheets respectively. The two lifting units are arranged to support the bottoms of the stator punching sheets, the clamping groove unit can finish arrangement of the scattered stator punching sheets, then the axial limiting unit can clamp the stator punching sheets, the welding gun can move along the grooves, the stator punching sheets are welded and fixed, the corresponding units are reasonably started to work, and the working efficiency of the stator punching sheets is improved. Automatic arrangement, alignment and welding of the stator punching sheets can be achieved, manual alignment of the stator punching sheets is not needed, and the welding efficiency and stability of the stator punching sheets are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor manufacturing, and particularly relates to a welding device for laminating stator punching sheets of a motor. Background Art

[0002] Currently, before welding stator punching sheets, laminating treatment is required. The edges of the blanked stator punching sheets are aligned and stacked, and then a welding device is used to weld and fix the stator punching sheets. Traditional operation methods mostly rely on manual labor. Workers stack multiple stator punching sheets one by one, then align the winding slots on the punching sheets, and then perform welding and fixing. This method not only has low efficiency, but also due to the instability of manual operation, it is difficult to ensure the precise alignment of each stator punching sheet, resulting in problems such as poor concentricity and misalignment of winding slots in the welded stator punching sheet stack, affecting the electromagnetic performance and operation stability of the motor, increasing motor losses, and reducing motor efficiency. Some enterprises use automated equipment for laminating and welding processing. However, existing automated equipment has many deficiencies and is difficult to be compatible with stator punching sheets of different outer diameters. When different specifications of motors need to be produced, the adjustment process of the equipment is complex and cumbersome, taking a long time, which greatly limits the versatility of the equipment and the flexibility of production. Summary of the Invention

[0003] Aiming at the above-mentioned existing technical deficiencies, the purpose of the present invention is to provide a welding device for laminating stator punching sheets of a motor, which can tidy up the stator punching sheets and complete welding.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a welding device for laminating stator punching sheets of a motor, including: Two lifting units, symmetrically arranged on the frame, for supporting the stator punching sheet from the radial direction of the stator punching sheet; A pressing unit, arranged on the frame above the symmetric center of the two lifting units, for restricting the upward movement of the stator punching sheet; Two axial limiting units, arranged on the frame, having the freedom to move along the axial direction of the stator punching sheet, for respectively abutting against both ends of the stacked stator punching sheets; A card slot unit, arranged below the stator punching sheet, having the freedom to move along the axial direction of the stator punching sheet; A welding torch, arranged on the frame; Among them, a supporting roller for driving the stator punching sheet to rotate is rotatably installed on the lifting unit; the clamping groove unit moves from one end of the stacked stator punching sheets to the other end below, and is inserted into the grooves opened on the outer edge of the stator punching sheets one by one; when the clamping groove unit is inserted into the corresponding grooves on all the stator punching sheets, the winding grooves on all the stator punching sheets are aligned, and the two axial limiting units clamp the aligned stator punching sheets from both ends of the stator punching sheets, the clamping groove unit moves out of the grooves, and the welding torch moves along the grooves to weld and fix all the stator punching sheets.

[0005] Preferably, the lifting unit includes: A slide rail, which is fixed on the frame; A slider, which is slidably installed in the slide rail, a roller shaft is arranged on the slider, and a first driving mechanism for driving the slider to move along the slide rail is arranged on the slide rail.

[0006] Preferably, two parallel roller shafts are rotatably installed on the slider, supporting rollers are sleeved on each roller shaft, and a second driving mechanism for driving the two roller shafts to rotate synchronously is arranged on the slider.

[0007] Preferably, the pressing unit includes two pressure rollers parallel to the roller shafts, and the pressure rollers are arranged on the frame through a lifting mechanism; Among them, when both the supporting roller and the pressure roller abut against the edge of the stator punching sheet, the distance between the pressure roller and the center of the stator punching sheet is equal to the distance between the supporting roller and the center of the stator punching sheet.

[0008] Preferably, the axial limiting unit includes: A first electric push rod, the fixed end of which is fixed on the frame; A push plate, which is fixed on the movable end of the first electric push rod, and the end face of the push plate away from the first electric push rod is perpendicular to the axis of the supporting roller.

[0009] Preferably, the distance between the axis of the push plate and the axes of all the supporting rollers is equal.

[0010] Preferably, the clamping groove unit includes: A base, which is arranged on the frame in a lifting manner; A second electric push rod, the fixed end of which is fixed on the base, and the second electric push rod is parallel to the supporting roller; A limiting strip, which is arranged on the movable end of the second electric push rod, and the limiting strip is parallel to the supporting roller and is located between the two lifting units.

[0011] Preferably, a connecting seat is fixed on the movable end of the second electric push rod, the limiting strip is movably inserted into the connecting seat, and a spring for pushing the limiting strip towards the stator punching sheet is arranged on the connecting seat.

[0012] Preferably, a spreading bar parallel to the limiting bar is arranged on the connecting seat, and a cylinder for driving the spreading bar to move away from or close to the limiting bar is fixed on the connecting seat.

[0013] Preferably, a third electric push rod parallel to the second electric push rod is fixedly installed on the base, and the welding torch is fixed at the movable end of the third electric push rod.

[0014] The beneficial effects of the present invention are as follows: Two lifting units provided in the present invention form a support for the bottom of the stator punch, and two axial limiting units can respectively support the front and rear ends of the stator punch, so that a plurality of misaligned stator punches are constrained between the lifting unit and the axial limiting unit. The pressure roller in the upper pressing unit cooperates with the lower supporting roller to form upper and lower constraints on the stator punch, ensuring that the axis of the stator punch remains horizontal. Then the supporting roller rotates to drive the stator punch to rotate. At this time, the slot units are inserted into the grooves of the stator punch one by one to align the grooves of all the stator punches, completing the sorting of the scattered stator punches. Then the axial limiting unit clamps the stator punch, the slot units gradually withdraw from the grooves, and the welding torch moves along the grooves to weld and fix the stator punch, completing the lamination and welding work of the stator punch. By reasonably starting the corresponding units to work, the automatic sorting, alignment and welding of the stator punches can be realized, without manual alignment of the stator punches, improving the welding efficiency and stability of the stator punches; In the present invention, the distance between the supporting rollers on the two lifting units can be adjusted by adjusting the position of the slider on the slide rail to be compatible with stator punches of different outer diameters, and the limiting bar can be lifted and lowered along with the base, so as to avoid the situation that the limiting bar cannot match the groove due to the change of the outer diameter of the stator punch; By arranging a spring on the connecting seat, the impact when the limiting bar contacts the stator punch can be reduced, and when the limiting bar is not aligned with the groove, the limiting bar can rely on elasticity to abut against the stator punch, avoiding damage to the stator punch by the limiting bar; Each lifting unit includes two supporting rollers, and the pressing unit also includes two pressure rollers. When the supporting rollers and the pressure rollers all abut against the edge of the stator punch, the distance between the pressure roller and the center of the stator punch is equal to the distance between the supporting roller and the center of the stator punch. In this way, each supporting roller and pressure roller are tangent to the edge of the stator punch. When one of the supporting rollers or pressure rollers rotates to the position of the groove, the remaining supporting rollers and pressure rollers can still stably constrain the position of the stator punch, avoiding the inclination of the stator punch. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a three-dimensional overall structure diagram of a welding device for stacked motor stator punching sheets provided by an embodiment of the present invention.

[0017] Figure 2 It is a schematic structural diagram of a card slot unit in a welding device for stacked motor stator punching sheets provided by an embodiment of the present invention.

[0018] Figure 3 For Figure 2 The partial enlarged view at A in

[0019] Figure 4 It is a front view of a welding device for stacked motor stator punching sheets provided by an embodiment of the present invention with one axial limiting unit omitted.

[0020] Figure 5 It is a schematic diagram of a supporting roller and a pressing roller in a welding device for stacked motor stator punching sheets provided by an embodiment of the present invention, cooperating to restrain the stator punching sheets.

[0021] Figure 6 For Figure 5 The partial enlarged view at B in

[0022] Figure 7 It is a side view of a welding device for stacked motor stator punching sheets provided by an embodiment of the present invention during actual use.

[0023] Figure 8 It is a three-dimensional diagram of a welding device for stacked motor stator punching sheets provided by an embodiment of the present invention during use.

[0024] Explanation of reference numerals: 1. Frame, 2. Lifting unit, 21. Supporting roller, 22. Second slide rail, 23. Second slider, 24. Roller shaft, 25. Lead screw, 26. Servo motor, 3. Pressing unit, 31. First slide rail, 32. First slider, 33. Pressing roller, 4. Axial limiting unit, 41. First electric push rod, 42. Pushing plate, 5. Card slot unit, 51. Base, 52. Second electric push rod, 53. Limiting bar, 54. Connecting seat, 55. Spring, 56. Expanding bar, 57. Cylinder, 6. Welding torch, 7. Third electric push rod, 8. Stator punching sheet, 81. Groove. Detailed implementation manners

[0025] 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 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.

[0026] Embodiment 1: As Figures 1 to 8 shown, Embodiment 1 of the present invention provides a lamination welding device for a motor stator punch 8, which is used to align and then weld and fix the stator punches 8 cut out to form a stator. As Figures 1 to 4 shown, the frame 1 includes a base and a plurality of brackets fixed on the base. Two lifting units 2 are symmetrically installed on the frame 1. Each lifting unit 2 includes two rotatable rollers 21. All the rollers 21 are parallel, and the axes of a plurality of stator punches 8 can be horizontally placed, so that a plurality of stator punches 8 are stacked front and back on the rollers 21.

[0027] As Figure 4 shown, the pressing unit 3 is located above the symmetric center of the two lifting units 2. As Figure 1 shown, the pressing unit 3 includes a vertical first slide rail 31 and a first slider 32 slidably installed in the first slide rail 31. Two pressure rollers 33 parallel to the rollers 21 are rotatably installed on the first slider 32. A lead screw 25 threadedly engaged with the first slider 32 is rotatably installed on the first slide rail 31. A servo motor 26 is fixed at the top of the first slide rail 31. The servo motor 26 drives the lead screw 25 to rotate, so that the first slider 32 moves on the first slide rail 31, driving the two pressure rollers 33 to move up and down on the frame 1. Before placing the stator punch 8 on the rollers 21, the servo motor 26 is first used to drive the pressure rollers 33 to rise to provide an operating space for placing the stator punch 8 on the rollers 21. As Figure 4 and Figure 5 shown, when the stator punch 8 is placed on the two lifting units 2, the perpendicular bisectors of the lines connecting the two rollers 21 in the same lifting unit 2 intersect at the center of the stator punch 8. When the servo motor 26 is used to drive the rollers 21 to abut against the top of the stator punch 8, the distances between the four rollers 21 and the two pressure rollers 33 from the center of the stator punch 8 are the same, that is, the four rollers 21 and the two pressure rollers 33 are all tangent to the stator punch 8, thus forming a stable limit for the stator punch 8.

[0028] As Figure 1As shown in the figure, the present invention also installs two axial limiting units 4 on the frame 1. The two axial limiting units 4 each include a first electric push rod 41 and a push plate 42. The axes of these two first electric push rods 41 are collinear and are respectively located at both ends of the stator punching 8. The fixed end of the first electric push rod 41 is fixed on the frame 1, while the movable end of the first electric push rod 41 is fixed at the center of the push plate 42 and is perpendicular to the push plate 42. And the first electric push rod 41 is parallel to the idler roller 21. Therefore, the end faces of the two push plates 42 close to the stator punching 8 are perpendicular to the axis of the idler roller 21. These two push plates 42 can limit the stator punching 8 from both ends of the stator punching 8. Cooperating with the idler roller 21 and the pressure roller 33, axial and radial limiting of the stator punching 8 is formed, so that when the idler roller 21 drives the stator punching 8 to rotate, its position remains stable.

[0029] As Figure 1 shown, the second electric push rod 52 is arranged on the bracket on the base and is parallel to the idler roller 21. The card slot unit 5 includes a limit bar 53 arranged at the movable end of the second electric push rod 52. When the second electric push rod 52 is started, it pushes the limit bar 53 to move from under one end of the stacked stator punchings 8 to the other end. Since the limit bar 53 is parallel to the idler roller 21 and is located below the middle of the two lifting units 2, the stator punching 8 continuously rotates under the action of the idler roller 21. At the same time, when the limit bar 53 moves along the axis of the stator punching 8, it can be inserted into the grooves 81 opened on the outer edge of the stator punching 8 one by one. When the limit bar 53 is inserted into the groove 81 on the stator punching 8, the stator punching 8 is blocked by the limit bar 53 and will no longer rotate with the idler roller 21. When the limit bar 53 is inserted into the corresponding grooves 81 on all the stator punchings 8, the winding grooves on all the stator punchings 8 are aligned, realizing the sorting of the scattered stator punchings 8, and then the idler roller 21 is paused from rotating.

[0030] Then, the two axial limiting units 4 continue to work. The movable ends of the first electric push rods 41 extend, and push the two push plates 42 to clamp the stator punching 8 from both ends of the stator punching 8. The distance between the axis of the push plate 42 and the axes of all the idler rollers 21 is equal, ensuring that the clamping force is evenly distributed and preventing the stator punching 8 from shifting. Then, the second electric push rod 52 withdraws the limit bar 53. At this time, the third electric push rod 7 arranged on the bracket is started, and the welding torch 6 on the movable end of the third electric push rod 7 moves along the groove 81 to weld and fix all the stator punchings 8, completing the lamination and welding work of the stator punchings 8.

[0031] Through the above design, the present invention can automatically complete the sorting, alignment and welding of the stator punchings 8 without manual intervention, greatly improving the welding efficiency and stability, and is suitable for large-scale production of stator punchings 8 with conventional dimensions.

[0032] Embodiment 2: On the basis of Embodiment 1, in order to improve the compatibility of the present invention and match the welding operations of stator punching sheets 8 with various different outer diameters, the idler rollers 21 designed in the present invention are movable. As Figure 1 and Figure 4 shown, the lifting unit 2 designed in the present invention includes a second slide rail 22 fixed to the frame 1 and a second slider 23 slidably mounted on the second slide rail 22. A lead screw 25 is rotatably mounted on the second slide rail 22, and a motor for driving the lead screw 25 to rotate is fixed on the second slide rail 22, and the roller shafts 24 of the two idler rollers 21 are rotatably mounted on the second slider 23.

[0033] The present invention can drive the lead screw 25 to rotate by using the servo motor 26, so that the second slider 23 moves on the second slide rail 22, adjusts the position of the second slider 23 on the second slide rail 22, moves the idler rollers 21, and makes the axes of the idler rollers 21 on the two lifting units 2 match the outer diameter of the stator punching sheet 8. At the same time, another motor is fixedly installed on the second slider 23, a first gear is fixed on the roller shaft 24, and a second gear meshing with the first gear is fixed at the output end of the motor. Therefore, the two roller shafts 24 can be driven to rotate synchronously by the motor, so that the idler rollers 21 drive the stator punching sheet 8 to rotate.

[0034] Considering that when the outer diameter of the stator punching sheet 8 changes, the relative position between the groove 81 thereon and the limit bar 53 also changes. Therefore, in the present invention, a vertical slide rail is fixed on the bracket, and a base 51 is slidably mounted on the slide rail. The base 51 can be lifted along the slide rail by a lead screw 25 mechanism, thereby driving the limit bar 53 to lift, so that the limit bar 53 can match the position of the groove 81.

[0035] When welding the stator punching sheet 8 is required, first, according to the outer diameter of the stator punching sheet 8, the positions of the sliders on the two lifting units 2 on the slide rail are adjusted by the servo motor 26 and the lead screw 25, thereby changing the distance between the idler rollers 21 on the two lifting units 2 and the axis of the push plate 42, so that the position of the idler rollers 21 matches the outer diameter of the stator punching sheet 8. At the same time, since the limit bar 53 is arranged on the base 51, the height of the base 51 can be adjusted according to the change of the outer diameter of the stator punching sheet 8 to ensure that the limit bar 53 can correctly match the groove 81 on the outer edge of the stator punching sheet 8. When the idler rollers 21 drive the stator punching sheet 8 to rotate, the limit bars 53 of the card slot unit 5 are pushed by the second electric push rod 52 and are inserted into the grooves 81 of the stator punching sheet 8 one by one to achieve the alignment of the winding grooves.

[0036] Through the above settings, the present invention can adjust the position of the idler rollers 21 and the height of the limit bar 53, can adapt to stator punching sheets 8 with different outer diameters, has wide applicability, reduces the equipment cost of enterprises, and improves production flexibility.

[0037] Embodiment 3: Based on the first and second embodiments, during the lamination welding of the stator punching sheet 8, in order to prevent excessive impact when the limit stop bar 53 contacts the stator punching sheet 8 and avoid damage to the stator punching sheet 8 when the limit stop bar 53 moves towards the stator punching sheet 8 without being aligned with the groove 81, the present invention provides a buffer structure.

[0038] A connecting seat 54 is fixed to the movable end of the second electric push rod 52. A spring 55 is arranged on the connecting seat 54. One end of the limit stop bar 53 close to the connecting seat 54 passes through the spring 55 and is movably inserted into the connecting seat 54. Therefore, the limit stop bar 53 can abut against the end face of the stator punching sheet 8 under the action of the spring 55. The spring 55 can play a buffering role, reduce the impact force, and protect the stator punching sheet 8 from damage. If the limit stop bar 53 is not aligned with the groove 81, the elasticity of the spring 55 will make the limit stop bar 53 abut against the stator punching sheet 8 by elasticity. When the limit stop bar 53 is aligned with the groove 81, the limit stop bar 53 can be inserted into the groove 81 to limit the continuous rotation of the stator punching sheet 8, thereby aligning the stator punching sheets 8 one by one.

[0039] Considering that there is a certain frictional force between the stator punching sheets 8, which may cause the limit stop bar 53 not to be fully aligned with the groove 81, the present invention also slidably mounts a spreading stop bar 56 on the connecting seat 54. As Figure 3 shown, a cylinder 57 is arranged between the spreading stop bar 56 and the connecting seat 54. When the cylinder 57 expands and contracts, it can drive the spreading stop bar 56 to move towards or reset to the limit stop bar 53. As Figure 6 shown, when both the spreading stop bar 56 and the limit stop bar 53 are located in the groove 81, the cylinder 57 can be started to make the spreading stop bar 56 cooperate with the limit stop bar 53 to abut against both side surfaces of the groove 81, so as to align some skewed stator punching sheets 8 and improve the lamination accuracy.

[0040] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A welding device for motor stator punching laminations, characterized in that, Comprising: Two lifting units, symmetrically arranged on the frame, for radially supporting the stator punching from below; A downward pressing unit, arranged on the frame above the symmetric center of the two lifting units, for restricting the upward movement of the stator punching; Two axial limiting units, arranged on the frame, having the freedom to move along the axial direction of the stator punching, for respectively abutting against both ends of the stacked stator punchings; A card slot unit, arranged below the stator punching, having the freedom to move along the axial direction of the stator punching; A welding torch, arranged on the frame; Wherein, a supporting roller for driving the stator punching to rotate is rotatably installed on the lifting unit; the card slot unit moves from one end of the stacked stator punchings to the other end below, and is inserted into the grooves opened on the outer edge of the stator punching one by one; when the card slot unit is inserted into the corresponding grooves on all the stator punchings, the winding grooves on all the stator punchings are aligned, the two axial limiting units clamp the aligned stator punchings from both ends of the stator punching, the card slot unit is removed from the groove, and the welding torch moves along the groove to weld and fix all the stator punchings.

2. The lamination welding device for the motor stator punching sheet according to claim 1, characterized in that, The lifting unit includes: A slide rail, the slide rail is fixed on the frame; A slider, the slider is slidably installed in the slide rail, a roller shaft is arranged on the slider, and a first driving mechanism for driving the slider to move along the slide rail is arranged on the slide rail.

3. The lamination welding device for a motor stator punching sheet according to claim 2, wherein, Two parallel roller shafts are rotatably installed on the slider, a supporting roller is sleeved on each roller shaft, and a second driving mechanism for driving the two roller shafts to rotate synchronously is arranged on the slider.

4. The motor stator punching lamination welding device according to claim 3, characterized in that, The downward pressing unit includes two pressure rollers parallel to the roller shafts, and the pressure rollers are arranged on the frame through a lifting mechanism; Wherein, when both the supporting roller and the pressure roller abut against the edge of the stator punching, the distance between the pressure roller and the center of the stator punching is equal to the distance between the supporting roller and the center of the stator punching.

5. The lamination welding device for a motor stator punching sheet according to claim 1, characterized in that, The axial limiting unit includes: A first electric push rod, the fixed end of the first electric push rod is fixed on the frame; A push plate, the push plate is fixed on the movable end of the first electric push rod, and the end face of the push plate away from the first electric push rod is perpendicular to the axis of the supporting roller.

6. The lamination welding device for the motor stator punching sheet according to claim 5, wherein, The distance between the axis of the push plate and the axes of all the supporting rollers is equal.

7. The lamination welding device for the motor stator punching sheet according to claim 1, wherein, The card slot unit includes: A base, the base is arranged on the frame in a lifting manner; A second electric push rod, the fixed end of the second electric push rod is fixed on the base, and the second electric push rod is parallel to the supporting roller; A limiting bar, the limiting bar is arranged on the movable end of the second electric push rod, and the limiting bar is parallel to the supporting roller and is located between the two lifting units.

8. A motor stator punching lamination welding device according to claim 7, characterized in that, A connecting seat is fixed on the movable end of the second electric push rod, the limiting bar is movably inserted into the connecting seat, and a spring for pushing the limiting bar towards the stator punching is arranged on the connecting seat.

9. The lamination welding device for a motor stator punching sheet according to claim 8, characterized in that, A spreading bar parallel to the limiting bar is arranged on the connecting seat, and a cylinder for driving the spreading bar to move away from or close to the limiting bar is fixed on the connecting seat.

10. A motor stator punching lamination welding device according to claim 7, characterized in that, A third electric push rod parallel to the second electric push rod is fixedly installed on the base, and the welding torch is fixed on the movable end of the third electric push rod.

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