Motor stator sheet torsion welding tooling

Abstract

The application belongs to the field of motor stator welding, and particularly relates to a motor stator sheet skewing welding tool, which comprises a base plate, tool components for clamping a skewed stator core are arranged on the base plate, rotating components for driving the tool components and the stator core to rotate are arranged on the bottom side of the base plate, mounting columns are arranged on both sides of the tool components on the base plate, detachable top cover components are arranged on the top of the mounting columns, the tool components comprise a rotating disc rotatably arranged on the base plate, a plurality of skewing rods are evenly arranged on the rotating disc in the circumferential direction, the skewing rods are twisted according to the shape of the wire slot of the stator core, a bottom pressing plate is vertically slidably arranged on the skewing rods, an avoiding groove accommodating the whole skewing rod is arranged on the bottom pressing plate above each skewing rod, the skewing rods are evenly divided into two groups, the two groups of skewing rods are staggered, and at least one group of skewing rods can rotate around the shaft of the rotating disc.

Description

Technical Field

[0001] This invention belongs to the field of motor stator welding, specifically a tooling for twisting and welding motor stator laminations. Background Technology

[0002] To reduce motor cogging torque, lower operating noise, and improve air gap magnetic field waveform, motor stator cores generally adopt a process of integrally twisting and forming after silicon steel sheets are stacked. The twisted stator core needs to be circumferentially welded while maintaining a precise twist angle to ensure that the relative positions of each layer of silicon steel sheets are fixed. At present, the industry's conventional stator welding fixtures are only applicable to straight slot stators without twisting. The special fixtures for twisted stators have multiple inherent technical defects in twist angle positioning, lamination and fixing, and auxiliary lamination forming in twisting, making it difficult to guarantee the welding forming accuracy and consistency of the finished product. Therefore, a special fixture for twisted stators is needed.

[0003] For example, Chinese invention patent CN106787500A discloses a stator lamination welding twisting fixture, which includes a lower cover plate and an upper cover plate that cooperates with the lower cover plate to clamp the stator laminations. A positioning mandrel is provided on the lower cover plate, and the stator laminations are sleeved on the positioning mandrel. A twisting groove is formed on the side wall of the positioning mandrel, and a twisting strip is engaged in the twisting groove. The inner half of the twisting strip is engaged in the twisting groove, and the outer half of the twisting strip protrudes from the twisting groove. The slots are engaged and positioned with the stator lamination slots. The slots of the stator laminations are positioned one by one with the twisted strips and overlapped on the positioning mandrel under the guidance of the twisted strips. Then, they are pressed together by the upper and lower cover plates. Since the twisted strips are inclined on the side wall of the positioning mandrel, and the slots of the stator laminations cooperate with the twisted strips, the overall inclination or spiraling of the stator lamination slots can be easily achieved under the guidance of the twisted strips, which improves the efficiency and effect of positioning and clamping.

[0004] However, the above solution still has the following problems: 1. The above solution uses the method of inserting a twisted bar into the wire groove to restrict its twisted shape. However, the strength of the twisted bar itself cannot be guaranteed, and it cannot achieve rigid positioning of the stator core. After welding and heating, the silicon steel sheet is prone to springback and reset, and the twisted angle will shift. The twisted accuracy of the stator is difficult to control. The thermal stress generated by the high temperature of welding can easily cause axial warping and interlayer slippage of the silicon steel sheet. The overall stability of the stator is poor, and the weld formation is uneven, which directly affects the subsequent electromagnetic performance of the motor.

[0005] 2. The existing clamping action for the skewed stator is mostly done manually or with low automation, making it impossible to completely eliminate manual labor. This results in low assembly efficiency and the assembly accuracy cannot be fully guaranteed. In addition, manual assembly of the skewed stator makes it difficult to ensure the consistency of its skewed state, requiring recalibration and correction after assembly and skewing, which is time-consuming and inefficient.

[0006] 3. Existing skew stator tooling is prone to assembly gaps after clamping, which cannot fully fit the inner wall of the slot to forcibly constrain the silicon steel sheets. The lamination is prone to local misalignment due to the gaps, making it difficult to accurately lock the required skew angle. The upper limit of skew forming accuracy control is low, and the skew angle dispersion of mass-produced stators is large, resulting in poor product consistency.

[0007] 4. After the silicon steel sheets are punched, they are stacked to form the stator core. The friction between the contact surfaces of the sheets is relatively large. During the torsion adjustment process, the layers are prone to jamming with each other, making it difficult to twist them synchronously to a uniform torsion angle. The torsion is achieved by mechanically forcing the grooves to twist using limit rods. However, forced twisting can easily cause the edges of the silicon steel sheets to be squeezed and deformed, and the dimensions of the grooves to be out of tolerance. In severe cases, local damage to the silicon steel sheets may occur. Alternatively, manual assistance in knocking the sheets not only increases the process time but also introduces human error. At the same time, there is a risk of tooling collisions and workpiece scratches. The adaptability to automated mass production is insufficient. Summary of the Invention

[0008] To overcome the shortcomings of existing technologies, this invention addresses the technical problem by using a torsion bar to guide and limit the torsional shape of the stator core, ensuring its stable torsional state during welding. The bottom pressure plate and top cover clamp the upper and lower ends of the stator core, stably fixing it and maintaining stability throughout the welding process, thus guaranteeing welding quality. The liftable bottom pressure plate 28, in conjunction with the torsion bar, allows the silicon steel sheets to be guided by the torsion bar 12 to spontaneously form a torsional state during the stacking and gradual formation of the stator core. This eliminates the need for manual intervention, automatically, efficiently, and accurately achieving a compliant and qualified torsional angle, thereby improving the automation level of the equipment. To improve work efficiency, two sets of torsion bars are set up, and one set of torsion bars can rotate around the axis of the turntable. When clamping the stator core, one set of torsion bars rotates relative to the other set of torsion bars, allowing the two sets of torsion bars to come close to and clamp the side wall of the stator core slot, eliminating the gap between the torsion bars and the stator core slot. This forces the stator core, formed by stacked silicon steel sheets, to maintain a stable and accurate torsion state. The vibration generated by the rotation of the eccentric pendulum driven by the third motor causes the silicon steel sheets to bounce, reducing the friction between them. At this time, the relative rotation of the two sets of torsion bars performs the torsion limit action, making the process smoother and playing an auxiliary role in sheet handling.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a welding fixture for twisting and tilting motor stator laminations, comprising: A substrate, on which a tooling component for clamping a twisted stator core is provided, and a rotating component for driving the tooling component and the stator core to rotate is provided on the bottom side of the substrate. Mounting posts are provided on both sides of the tooling component on the substrate, and a detachable top cover component is provided on the top of the mounting posts. The tooling component includes a turntable rotatably mounted on a base plate. Multiple torsion bars are evenly distributed on the turntable in a circumferential direction. The torsion bars are torsion according to the shape of the stator core groove. A bottom pressure plate is vertically slidably mounted on the torsion bars. A clearance groove for accommodating the entire torsion bar is opened on the bottom pressure plate on each torsion bar.

[0010] Furthermore, the torsion bar is divided into two groups, which are arranged alternately. At least one group of the torsion bar can rotate around the axis of the turntable. The two groups of torsion bars are used to rotate relative to each other and approach the side wall of the stator core slot to eliminate gaps.

[0011] Furthermore, one set of the torsion bars is fixedly connected to the turntable, and a first arc groove is provided on the turntable at the corresponding position of another set of turntables. A rotating ring is coaxially rotatably provided at the bottom of the turntable, and one end of the turntable passing through the first arc groove is fixedly connected to the rotating ring. A second arc groove is provided on the first arc groove at the corresponding position of each torsion bar fixed to the turntable.

[0012] Furthermore, the torsion bar is made of high-hardness alloy material with a smooth surface. The bottom of the torsion bar is provided with a step at the surface of the turntable and the edge of the first arc groove. The bottom of the step is provided with a threaded part. The torsion bar is installed on the turntable and the ring respectively through the threaded part and the nut.

[0013] Furthermore, a gear ring is fixedly connected to the inner side of the rotating ring, a motor frame is fixedly connected to the bottom side of the turntable, a first motor is fixedly connected to the bottom of the motor frame, the power output end of the first motor passes through the motor frame and is connected to a gear, the gear meshes with the inner ring of the gear ring for transmission, a cylinder is fixedly connected to the turntable on one side of the gear, and the top of the cylinder rod is fixedly connected to the bottom pressure plate.

[0014] Furthermore, a set of support columns is fixedly installed on the bottom pressure plate on one side of the cylinder, and a third motor is fixedly connected to the support columns. An output shaft is rotatably connected to the bottom pressure plate at the position corresponding to the third motor. An eccentric pendulum is fixedly connected to the end of the bottom end of the output shaft that passes through the bottom pressure plate. The top end of the output shaft is connected to the output end of the third motor.

[0015] Furthermore, the rotating component includes a gear frame, which is fixedly connected to the bottom edge of the turntable. A bevel gear ring is fixedly connected to the bottom end of the gear frame. The turntable and the bevel gear ring are rotatably connected to the base plate. A gear shaft seat is fixedly connected to the bottom side of the base plate at one side of the bevel gear ring. A bevel gear is rotatably connected inside the gear shaft seat. The bevel gear meshes with the bevel gear ring for transmission. A second motor is provided at the corresponding position on the bottom side of the base plate at the gear shaft seat. The power output end of the second motor is transmitted to the end of the bevel gear.

[0016] Furthermore, the top cover component includes a mounting plate, both ends of which are fixedly connected to the top of the mounting column via connecting knobs. A top pressure ring is rotatably connected to the bottom side of the mounting plate, and the bottom side of the top pressure ring is used to press against the top of the stator core.

[0017] Furthermore, a slot is provided on the bottom side of the top pressure ring at the corresponding position of the torsion bar, each torsion bar has a vertical top and a tapered end, and the cross-sectional shape of the slot fits the end of the torsion bar.

[0018] Furthermore, at least two sets of tooling components are symmetrically arranged on the substrate, and a rotating shaft is fixedly connected to the substrate at the symmetrical center of each set of tooling components. A pulley is provided at the bottom of the rotating shaft, and multiple universal rollers are provided at the edge of the substrate.

[0019] In summary, compared with the prior art, the beneficial effects of the present invention are as follows: (1) By setting a torsion bar, the torsion shape of the stator core is guided and limited, and it is a rigid contact limit, which can ensure that the stator core is stably maintained in its torsion state for welding. The bottom pressure plate and the top cover component clamp the upper and lower ends of the stator core to fix the stator core stably, so that it remains stable during the welding process, thereby ensuring its welding quality.

[0020] (2) By using the liftable bottom pressure plate 28 in conjunction with the torsion bar, the silicon steel sheets can be guided by the torsion bar 12 to spontaneously form a torsion state during the process of stacking and placing silicon steel sheets to gradually form the stator core. This allows the silicon steel sheets to automatically, efficiently and accurately form a compliant and qualified torsion angle without human intervention, thereby improving the automation level and work efficiency of the equipment.

[0021] (3) By setting two sets of torsion bars, and setting one set of torsion bars to be able to rotate around the axis of the turntable, when the stator core is clamped, one set of torsion bars rotates relative to the other set of torsion bars, so that the two sets of torsion bars can be close to and clamp the side wall of the stator core slot, eliminating the gap between the torsion bars and the stator core slot, thus forcing the stator core formed by stacking silicon steel sheets to maintain a stable and accurate torsion state.

[0022] (4) Vibration is generated by driving the eccentric pendulum to rotate through the third motor. The vibration causes the silicon steel sheets to bounce, reducing the friction between the silicon steel sheets. At this time, the relative rotation of the two sets of torsion bars is carried out to perform the torsion limit action, which makes the process smoother and plays an auxiliary role in sheet sorting. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the present patent.

[0024] Figure 2 This is a three-dimensional schematic diagram from another perspective of this patent.

[0025] Figure 3 This is a side view of the present patent.

[0026] Figure 4 for Figure 3 A three-dimensional sectional view at point AA.

[0027] Figure 5 for Figure 4 A magnified view of a section at point B.

[0028] Figure 6 This is a schematic diagram of the main structure of this patent.

[0029] Figure 7 for Figure 6 A magnified view of a section at point C.

[0030] Figure 8 This is a schematic diagram of the turntable and the rotating ring.

[0031] Figure 9 This is a structural diagram of the top cover component.

[0032] Figure 10 This is a schematic diagram showing the position of the torsion bar.

[0033] Figure 11 This is a schematic diagram of the structure of Example 2.

[0034] Explanation of reference numerals in the attached drawings: Base plate 10; Turntable 11; Torsion bar 12; Step 13; Threaded part 14; First arc groove 15; Rotary ring 16; Second arc groove 17; Gear ring 18; Gear 19; Motor frame 20; First motor 21; Gear frame 22; Bevel ring 23; Bevel gear 24; Gear shaft seat 25; Second motor 26; Cylinder 27; Bottom pressure plate 28; Clearance groove 29; Eccentric pendulum 30; Third motor 31; Top pressure ring 32; Slot 33; Mounting plate 34; Connecting knob 35; Mounting column 36; Universal roller 37; Rotating shaft 38; Pulley 39; Support column 40; Output shaft 41. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0036] Example 1: like Figure 1-10 As shown, a stator lamination twisting welding fixture for an electric motor includes a base plate 10, a turntable 11 rotatably connected to the base plate 10, two sets of intersecting twisted rods 12 respectively provided on the turntable 11, and a bottom pressure plate 28 vertically slidably provided on the two sets of twisted rods 12. The bottom pressure plate 28 has a relief groove 29 at the corresponding position of each twisted rod 12 to accommodate the entire twisted rod 12. Mounting posts 36 are fixedly connected to the base plate 10 on both sides of the turntable 11. A detachable top cover component is provided on the top of the mounting post 36. The bottom pressure plate 28 and the top cover component are used to clamp and fix the stator core. The twisted rods 12 pass through the wire grooves of the stator core and conform to the twisted shape of the stator core.

[0037] By setting the torsion bar 12, the torsion shape of the stator core is guided and limited. The rigid contact limit ensures that the stator core is stably maintained in its torsion state for welding. The bottom pressure plate 28 and the top cover component clamp the upper and lower ends of the stator core, stably fixing the stator core and keeping it stable during the welding process, thereby ensuring the welding quality.

[0038] like Figure 1-10 As shown, the torsion bar 12 is divided into two groups, which are arranged in an alternating manner. The torsion bar 12 is made of high-hardness alloy material and has a smooth surface. One group of torsion bars 12 is fixedly connected to the turntable 11. A first arc groove 15 is provided on the turntable 11 at the corresponding position of the other group of turntables 11. A rotating ring 16 is coaxially rotatably provided at the bottom of the turntable 11. One end of the turntable 11 passing through the first arc groove 15 is fixedly connected to the rotating ring 16. A second arc groove 17 is provided on the first arc groove 15 at the corresponding position of each torsion bar 12 fixed to the turntable 11. A step 13 is provided at the bottom of the torsion bar 12 on the surface of the turntable 11 and at the edge of the first arc groove 15. A threaded part 14 is provided at the bottom of the step 13. The torsion bar 12 is installed on the turntable 11 and the rotating ring 16 respectively through the threaded part 14 and the nut. A plane is provided on the threaded part 14 to limit the deflection of the torsion bar 12.

[0039] By setting two sets of torsion bars 12, and setting one set of torsion bars 12 to be able to rotate around the axis of the turntable 11, when the stator core is clamped, one set of torsion bars 12 rotates relative to the other set of torsion bars 12, so that the two sets of torsion bars 12 can approach and clamp the side wall of the stator core slot, eliminating the gap between the torsion bars 12 and the stator core slot, thus forcing the stator core formed by stacking silicon steel sheets to maintain a stable and accurate torsion state.

[0040] By using the liftable bottom pressure plate 28 in conjunction with the torsion bar, the silicon steel sheets can be guided by the torsion bar 12 to spontaneously form a torsion state during the process of stacking and placing silicon steel sheets to gradually form the stator core. This allows the silicon steel sheets to automatically, efficiently and accurately form a compliant and qualified torsion angle without human intervention, thereby improving the automation level and work efficiency of the equipment.

[0041] The torsion bar 12 is made of high-hardness alloy to improve its positioning accuracy for the torsion of the stator core and to prevent severe wear or deformation of the torsion bar 12 after long-term use, which would affect the positioning accuracy and improve its service life. The two sets of torsion bars 12 are fixedly set on the turntable 11 and the rotating ring 16 respectively, and the first arc groove 15 and the second arc groove 17 are respectively opened to leave space for the rotation of the torsion bar 12. The step 13 can keep the torsion bar 12 always rotating on the surface of the turntable 11. The upper plane of the threaded part 14 effectively prevents the torsion bar 12 from deflecting and avoids the misalignment of the torsion bar 12 from affecting its positioning accuracy in the torsion state.

[0042] like Figure 1-10 As shown, a gear ring 18 is fixedly connected to the inner side of the rotating ring 16, a motor frame 20 is fixedly connected to the bottom side of the turntable 11, a first motor 21 is fixedly connected to the bottom of the motor frame 20, the power output end of the first motor 21 passes through the motor frame 20 and is connected to a gear 19, the gear 19 meshes with the inner ring of the gear ring 18, and a cylinder 27 is fixedly connected to the turntable 11 on one side of the gear 19, the top of the rod of the cylinder 27 is fixedly connected to the bottom pressure plate 28.

[0043] By setting the toothed ring 18 and the gear 19, the rotating ring 16 can be driven to rotate, which in turn drives a set of torsion bars 12 to rotate around the axis of the turntable 11, thereby realizing the relative rotation of the two sets of torsion bars 12 to stably clamp the side wall of the stator core slot.

[0044] like Figure 1-10 As shown, the top cover component includes a mounting plate 34. Both ends of the mounting plate 34 are fixedly connected to the top of the mounting post 36 via connecting knobs 35. A top pressure ring 32 is rotatably connected to the bottom side of the mounting plate 34. The bottom side of the top pressure ring 32 is used to press the top of the stator core. A slot 33 is provided on the bottom side of the top pressure ring 32 at the corresponding position of the torsion bar 12. The top of each torsion bar 12 is vertical and the end is tapered. The cross-sectional shape of the slot 33 fits the end of the torsion bar 12.

[0045] By setting a rotatable top pressure ring 32, the stator core can be stably clamped at both ends by the top pressure ring 32 and the bottom pressure plate 28, while allowing it to rotate freely, facilitating comprehensive welding of the stator core. The slot 33, when installing the top cover component, limits and fixes the top end of the torsion bar 12, thus preventing bending or deformation of the torsion bar 12 during the torsion limiting of the stator core. like Figure 1-10 As shown, a gear frame 22 is fixedly connected to the bottom edge of the turntable 11, and a bevel ring 23 is fixedly connected to the bottom end of the gear frame 22. The turntable 11 and the bevel ring 23 are rotatably connected to the base plate 10. A gear shaft seat 25 is fixedly connected to the bottom side of the base plate 10 on one side of the bevel ring 23. A bevel gear 24 is rotatably connected inside the gear shaft seat 25. The bevel gear 24 meshes with the bevel ring 23 for transmission. A second motor 26 is provided at the corresponding position of the gear shaft seat 25 on the bottom side of the base plate 10. The power output end of the second motor 26 is connected to the end of the bevel gear 24 for transmission.

[0046] By setting bevel gear 24 and second motor 26, the turntable 11 can be driven to rotate the stator core that is clamped and tortuously limited, thereby facilitating the welding process of the stator core. At the same time, since the mounting post 36 is fixed relative to the base plate 10, the turntable 11 and the top pressure ring 32 can rotate freely, so the welding process will not be blocked by the mounting post 36, ensuring the smooth progress of the welding process.

[0047] like Figure 1-10 As shown, a set of support columns 40 are fixedly installed on the bottom pressure plate 28 on one side of the cylinder 27. A third motor 31 is fixedly connected to the support column 40. An output shaft 41 is rotatably connected to the bottom pressure plate 28 at the corresponding position of the third motor 31. An eccentric pendulum 30 is fixedly connected to the end of the bottom end of the output shaft 41 that passes through the bottom pressure plate 28. The top end of the output shaft 41 is connected to the output end of the third motor 31 through a transmission connection.

[0048] In the initial stage of operation, silicon steel sheets are gradually piled up and arranged on the bottom pressure plate 28, and the torsion bar 12 is inserted into the wire groove. The silicon steel sheets are not accurately aligned. In the final process of torsion limiting by the relative rotation of the two sets of torsion bars 12, the eccentric pendulum 30 is driven to rotate by the third motor 31 to generate vibration. The vibration causes the silicon steel sheets to bounce, reducing the friction between them. At this time, the relative rotation of the two sets of torsion bars 12 to perform the torsion limiting action makes the process smoother and plays an auxiliary role in sheet sorting.

[0049] In this embodiment, the device is set at a designated position on the automatic processing production line for motor stator cores and connected to the power supply and control system. The preceding process of the device is equipped with a silicon steel sheet feeding device. Initially, the top cover component has not yet been installed on the mounting column 36, and the cylinder 27 is in the extended state so that the bottom pressure plate 28 is at the highest point of the stroke at the top of the torsion bar 12. The two sets of torsion bars 12 are evenly spaced apart.

[0050] During operation, the front-mounted feeding device places silicon steel sheets one by one on the bottom pressure plate 28. The initial positions of each silicon steel sheet are consistent, and the position of the torsion bar 12 corresponds to the position of the groove on the silicon steel sheet and its diameter is smaller than that of the groove. Then, the vertical end of the top of the torsion bar 12 can accurately pass into the corresponding groove on each silicon steel sheet.

[0051] As the silicon steel sheets gradually stack on the bottom pressure plate 28, the control system synchronously controls the cylinder 27 to gradually move downward. At this time, the silicon steel sheets that are first stacked on the bottom pressure plate 28 will move downward with the bottom pressure plate 28 and be guided by the torsion bar 12 to automatically torsion until the number of silicon steel sheets stacked on the bottom pressure plate 28 reaches the specified requirement. Then the feeding device will stop feeding, and a stack of torsionally stacked silicon steel sheets will be formed on the bottom pressure plate 28, which forms a torsionally stacked stator core waiting for welding.

[0052] Then, the operator places the mounting plate 34 on top of the two mounting columns 36 and fixes the mounting plate 34 to the mounting columns 36 by connecting knob 35. The top of the torsion bar 12 is inserted into the slot 33 for fixation and limitation. Then, the control system automatically controls the third motor 31 to drive the eccentric pendulum 30 to rotate at high speed, which causes the bottom pressure plate 28 to vibrate and act on the silicon steel sheets stacked on the bottom pressure plate 28, causing the silicon steel sheets to bounce. Due to the limiting effect of the torsion bar 12, the bounce range of the silicon steel sheets is limited to a controllable range and there is no problem of silicon steel sheets detaching.

[0053] Meanwhile, the control system controls the first motor 21 to drive the gear 19 to rotate. The gear 19 and the meshing gear ring 18 then drive the rotating ring 16 to rotate, which in turn drives a set of torsion bars 12 to rotate around the axis of the turntable 11. During this process, the distance between the two sets of torsion bars 12 gradually decreases, allowing the two sets of torsion bars 12 to gradually come into contact with and clamp the side wall of the stator core slot until there is no gap between the torsion bars 12 and the side wall of the slot. During this process, the vibration causes the silicon steel sheets to jump, which greatly reduces the friction between the silicon steel sheets. This makes the process of the torsion bars 12 gathering and limiting the torsion state smoother, avoiding jamming or scratches on the surface of the silicon steel sheets.

[0054] Then, the control system shuts down the third motor 31 and controls the cylinder 27 to push up so that the bottom pressure plate 28 and the top pressure ring 32 can stably clamp the stator core to prevent misalignment or deformation during the welding process. Then, the clamped stator core is welded by the automatic welding device set in the production line. During the welding process, the second motor 26 drives the bevel gear 24 to rotate, and the bevel gear 24 meshes with the bevel gear ring 23, thereby driving the turntable 11 to rotate the stator core freely, thus completing the complete welding process of the stator core.

[0055] After processing is completed, the control system controls the two sets of torsion bars 12 to reset. The operator then disassembles the top cover component again, rotates the stator core upward and lifts it off. The control system then controls the bottom pressure plate 28 to rise and reset, waiting for the next processing cycle.

[0056] Example 2: like Figure 11 As shown, two workstations are symmetrically arranged on the substrate 10. A rotating shaft 38 is fixedly connected to the substrate 10 at the center of symmetry between the two workstations. A pulley 39 is provided at the bottom of the rotating shaft 38. Multiple universal rollers 37 are provided at the edge of the substrate 10.

[0057] Based on Embodiment 1, this embodiment has two tooling positions on the substrate 10. By setting the rotating shaft 38 and the pulley 39, the two tooling positions can be rotated and switched, so that the two stations can perform loading and welding operations simultaneously. That is, silicon steel sheets are stacked and twisted on one station, while welding is performed simultaneously on the other station, which greatly improves the processing efficiency of the stator core. At the same time, by setting the universal roller 37, when the substrate 10 is driven to rotate and the station is switched, the edge of the substrate 10 is rolled and supported, reducing the jamming phenomenon during the switching process, or the bending deformation of the substrate 10 body due to the long lever arm of the edge of the substrate 10.

[0058] The first motor 21, the second motor 26, and the third motor 31 mentioned above are mature existing technologies. The structures in the attached drawings are only for illustration, and their specific structures and working principles will not be described in detail here.

[0059] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0060] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0061] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A fixture for welding misaligned stator laminations of an electric motor, characterized in that, The motor stator lamination twist welding fixture includes: A substrate (10) is provided on the substrate (10) for clamping a twisted stator core. A rotating component is provided on the bottom side of the substrate (10) for driving the tooling component and the stator core to rotate. Mounting posts (36) are provided on both sides of the tooling component on the substrate (10). A detachable top cover component is provided on the top of the mounting posts (36). The tooling component includes a turntable (11) rotatably mounted on a base plate (10). Multiple torsion bars (12) are evenly distributed on the turntable (11) in the circumferential direction. The torsion bars (12) are twisted according to the shape of the stator core groove. A bottom pressure plate (28) is vertically slidably mounted on the torsion bars (12). A clearance groove (29) for accommodating the entire torsion bar (12) is opened on the bottom pressure plate (28) on each torsion bar (12).

2. The motor stator lamination twist welding fixture according to claim 1, characterized in that, The torsion bar (12) is divided into two groups, and the two groups of torsion bars (12) are arranged alternately. At least one group of torsion bars (12) can rotate around the axis of the turntable (11). The two groups of torsion bars (12) are used to rotate relative to each other and approach the side wall of the stator core to eliminate gaps.

3. The motor stator lamination twisting welding fixture according to claim 2, characterized in that, One set of the torsion bars (12) is fixedly connected to the turntable (11). A first arc groove (15) is provided on the turntable (11) at the corresponding position of another set of turntables (11). A rotating ring (16) is coaxially rotatably provided at the bottom of the turntable (11). One end of the turntable (11) passing through the first arc groove (15) is fixedly connected to the rotating ring (16). A second arc groove (17) is provided on the first arc groove (15) at the corresponding position of each torsion bar (12) fixed to the turntable (11).

4. The motor stator lamination twisting welding fixture according to claim 3, characterized in that, The torsion bar (12) is made of high-hardness alloy material and has a smooth surface. The bottom of the torsion bar (12) is provided with a step (13) on the surface of the turntable (11) and at the edge of the first arc groove (15). The bottom of the step (13) is provided with a threaded part (14). The torsion bar (12) is installed on the turntable (11) and the ring (16) respectively through the threaded part (14) and the nut.

5. The motor stator lamination twisting welding fixture according to claim 4, characterized in that, A gear ring (18) is fixedly connected to the inner side of the rotating ring (16), a motor frame (20) is fixedly connected to the bottom side of the turntable (11), a first motor (21) is fixedly connected to the bottom of the motor frame (20), the power output end of the first motor (21) passes through the motor frame (20) and is connected to a gear (19), the gear (19) meshes with the inner ring of the gear ring (18) and is connected to the turntable (11) on one side of the gear (19) and is fixedly connected to a cylinder (27), the top of the rod of the cylinder (27) is fixedly connected to the bottom pressure plate (28).

6. The motor stator lamination twisting welding fixture according to claim 5, characterized in that, A set of support columns (40) are fixedly installed on the bottom pressure plate (28) on one side of the cylinder (27). A third motor (31) is fixedly connected to the support column (40). An output shaft (41) is rotatably connected to the bottom pressure plate (28) at the position corresponding to the third motor (31). An eccentric pendulum (30) is fixedly connected to the end of the bottom end of the output shaft (41) that passes through the bottom pressure plate (28). The top end of the output shaft (41) is connected to the output end of the third motor (31) through a transmission connection.

7. The motor stator lamination twist welding fixture according to claim 6, characterized in that, The rotating component includes a gear carrier (22), which is fixedly connected to the bottom edge of the turntable (11). A bevel ring (23) is fixedly connected to the bottom end of the gear carrier (22). The turntable (11) and the bevel ring (23) are rotatably connected to the base plate (10). A gear shaft seat (25) is fixedly connected to the bottom side of the base plate (10) at one side of the bevel ring (23). A bevel gear (24) is rotatably connected inside the gear shaft seat (25). The bevel gear (24) meshes with the bevel ring (23) for transmission. A second motor (26) is provided at the corresponding position of the gear shaft seat (25) on the bottom side of the base plate (10). The power output end of the second motor (26) is connected to the end of the bevel gear (24) for transmission.

8. The motor stator lamination twist welding fixture according to claim 1, characterized in that, The top cover component includes a mounting plate (34), both ends of which are fixedly connected to the top of the mounting post (36) via connecting knobs (35). A top pressure ring (32) is rotatably connected to the bottom side of the mounting plate (34), and the bottom side of the top pressure ring (32) is used to press the top of the stator core.

9. The motor stator lamination twisting welding fixture according to claim 8, characterized in that, The top pressure ring (32) has a slot (33) at the corresponding position of the twisted bar (12) on its bottom side. The top of each twisted bar (12) is vertical and the end is tapered. The cross-sectional shape of the slot (33) fits the end of the twisted bar (12).

10. The motor stator lamination twisting welding fixture according to claim 1 or 6, characterized in that, No less than two sets of tooling components are symmetrically arranged on the substrate (10). A rotating shaft (38) is fixedly connected to the substrate (10) at the symmetrical center of each set of tooling components. A pulley (39) is provided at the bottom of the rotating shaft (38). Multiple universal rollers (37) are provided at the edge of the substrate (10).

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