Motor stator core drawing type shaping tool

Abstract

The application discloses a motor stator core drawing type shaping tool, and relates to the technical field of motor stator core processing tools, which comprises a driving and pressing assembly and a flattening and shrinking assembly, the driving and pressing assembly is used for overall power transmission, axial locking and limiting, and stator core inner hole reference positioning, and the flattening and shrinking assembly is coaxially sleeved outside the lower end of the driving and pressing assembly; the application is divided into two assemblies, each part is nested and assembled from top to bottom, the assembly logic is clear, there is no complex interlaced structure, the overall structure is a pure mechanical assembly type structure, there are no electrical and pneumatic auxiliary components, daily disassembly, cleaning, inspection, wear and replacement of small damaged parts can be independently operated, the overall tool body does not need to be disassembled, the maintenance steps are simple, and ordinary operators can complete routine maintenance and small part replacement; the overall structure is compact, occupies moderate installation space, and can be installed and used on a conventional press and a vertical tool station.

Description

Technical Field

[0001] This invention relates to the technical field of motor stator core processing tooling, specifically a motor stator core pulling and shaping tooling. Background Technology

[0002] The stator core of a motor is formed by stacking multiple layers of silicon steel sheets. After processing, defects such as out-of-tolerance roundness, coaxiality misalignment, end face tilting, and loose or warped laminations are prone to occur. Specialized shaping fixtures are required for correction and shaping. Existing stator core shaping fixtures have significant technical shortcomings: they lack a standardized central shaping reference structure, resulting in no precise fitting reference for core shaping and making it difficult to guarantee shaping accuracy; they lack an adaptive leveling mechanism, making the fixture prone to skew during pressing and shaping, leading to localized overload on the core and causing lamination misalignment and edge chipping; the guide and limiting structure is imperfect, making the components prone to jamming and circumferential movement, resulting in poor operational stability; and they lack an automatic reset structure, requiring manual disassembly of the fixture after shaping, which is cumbersome and inefficient for batch processing. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a motor stator core pulling and shaping fixture.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention provides a motor stator core drawing and shaping fixture, comprising: The drive clamping assembly and the leveling shrinking assembly are used for overall power transmission, axial locking and limiting, and stator core inner hole reference positioning. The leveling shrinking assembly is coaxially sleeved on the outer side of the lower end of the drive clamping assembly and is used for radial leveling of the outer circumference of the core, elastic shrinking and fitting, and anti-detachment and reset.

[0005] As a preferred embodiment of the present invention, the driving clamping assembly includes a main driving rod; the main driving rod is vertically disposed at the center of the tooling, and a lower limit locking nut is threadedly connected to the lower end surface of the main driving rod; an iron core positioning ring is movably sleeved on the surface of the main driving rod directly above the lower limit locking nut; and an upper limit locking nut is threadedly connected to the upper end surface of the main driving rod directly above the iron core positioning ring.

[0006] As a preferred embodiment of the present invention, the driving clamping assembly further includes a top pressure positioning plate and a limit adjustment slot; the top pressure positioning plate is mounted on the upper end of the main drive pull rod, and a limit adjustment slot is formed on the lower end of the top pressure positioning plate.

[0007] As a preferred embodiment of the present invention, the leveling and shrinking assembly includes a lower positioning washer, which is movably sleeved on the surface of the main drive rod and located directly above the lower limit locking nut. An inner stabilizing support ring and an upper positioning washer are sequentially and coaxially sleeved above the lower positioning washer, and the contact surfaces of the lower positioning washer, the inner stabilizing support ring, and the upper positioning washer overlap each other.

[0008] As a preferred embodiment of the present invention, multiple leveling movable plates are axially and evenly arranged on the outer surface of the inner stabilizing support ring, and an open-type shrink sleeve is fitted around the outer periphery of the multiple leveling movable plates, wherein the open-type shrink sleeve has an open section on one side.

[0009] As a preferred embodiment of the present invention, the outer circular surface of the open-type shrink sleeve is provided with an annular insert groove, and an elastic locking spring is engaged inside the annular insert groove.

[0010] The beneficial effects of this invention are: 1. This motor stator core drawing and forming fixture has a reasonable and regular positioning structure, ensuring stable and reliable coaxiality and consistency in forming. This invention employs a central positioning combined with a bidirectional upper and lower limiting and locking structure, which can stably confine the internal positioning components to a fixed axial position, preventing vertical movement and circumferential offset during operation. This provides a stable and centered inner hole positioning reference for the stator core. The outer circumferential shaping components are evenly arranged along the circumference and synchronously retract inward under force, applying uniform radial pressure to the outer circumference of the core. This can correct common morphological errors in the core, such as roundness deviation, slight loosening of laminations, and uneven end faces. The overall force is uniform and gentle, preventing chipping, misalignment, and extrusion damage to the silicon steel laminations. After shaping, the core has a uniform shape and small dimensional differences between batches, meeting the requirements of subsequent conventional assembly and fitting. There is no situation of eccentric shaping or local misalignment.

[0011] 2. This motor stator core pulling and shaping fixture has a built-in rotary fine-tuning structure, which can be adapted to various similar core specifications, reducing the frequency of fixture changes: This invention features a rotatable and adjustable structure at the top. Relying on the lower half-cut surface shape and slotted limit, rotation can slightly change the downward support height and pre-tightening stroke. It can be used with stator cores of the same type with different stack thicknesses and different inner hole matching sizes within a certain range. It does not require a separate shaping tooling for each specification. It can be universally adapted within the range of conventional models, reducing the number of toolings to be made by enterprises and reducing the time for tooling disassembly and debugging during production changeovers. The structural adjustment method is simple, and it can be completed by pure mechanical rotation without the need for professional tools and complex adjustments. It is suitable for routine production changeovers in the workshop. Its adaptability is practical and sufficient. It does not exaggerate universal compatibility, but only achieves compatibility with multiple specifications of the same category.

[0012] 3. This motor stator core pulling and shaping fixture, with its elastic sheath and snap ring structure, can adaptively open and close according to the shape and has automatic reset capability. The invention employs an open-type elastic sheath structure on the outer side, which possesses moderate elastic deformation capability. When the shaping component retracts inward and expands outward, the sheath can expand and contract synchronously, always fitting the outer side of the shaping component. This serves to regulate the shape and provide limiting and guiding functions, preventing the sheath from detaching, tilting, jamming, or deviating. After the shaping pressure is released, the sheath and shaping component can naturally return to their initial state by relying on the elastic pre-tightening force of the retaining spring. This eliminates the need for manual prying, resetting, and straightening of components, reducing auxiliary operation steps for each operation, simplifying the workflow, and making it suitable for repetitive continuous operations. It also improves the operational rhythm of conventional batch processing. The effect is attributed to the natural resetting characteristics of the structure, without exaggerating the degree of automation.

[0013] 4. This motor stator core drawing and shaping fixture features clearly defined components, purely mechanical nested assembly, and easy disassembly, maintenance, and component replacement. This invention consists of two main components, with each part nested sequentially from top to bottom. The assembly logic is clear, without complex interlacing structures. The overall structure is purely mechanical, without electrical or pneumatic auxiliary components. Routine disassembly, cleaning, wear inspection, and replacement of easily damaged small parts can all be performed independently without disassembling the main fixture. Maintenance steps are simple, and ordinary operators can complete routine maintenance and small part replacements. The overall structure is compact, occupying a moderate amount of installation space, and can be used with conventional presses and vertical fixture workstations. It is compatible with conventional equipment layouts on site. The structural durability relies on conventional metal materials and reasonable fit clearances, making it resistant to loosening and deformation over long-term use, resulting in a low failure rate and a light daily maintenance burden.

[0014] 5. This motor stator core pulling and forming fixture features multiple axial limiting and external clamping anti-detachment designs, ensuring structural stability and preventing loosening during operation. This invention employs an internal locking mechanism with upper and lower nuts to confine the intermediate positioning component within a fixed range. During the downward and upward movements, it prevents vertical movement and slippage, ensuring the positioning reference remains centered. Externally, a retaining spring holds the component within the outer ring groove of the sheath, maintaining a consistent and moderate clamping force. This ensures the sheath remains in close contact with the outer circumference of the shaping component, preventing slippage, falling off, or outward displacement during operation. The appropriate clearance between components ensures smooth movement without hard impacts or jamming. Overall, the operating conditions are stable, component wear is uniform, and the original fitting accuracy is maintained over a long period, resulting in a stable service life and reducing shaping defects and rework caused by structural loosening or misalignment. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a motor stator core drawing and shaping fixture according to the present invention; Figure 2 This is a structural schematic diagram of a motor stator core drawing and shaping fixture from a lower view, according to the present invention. Figure 3 This is a front sectional view of a motor stator core drawing and shaping fixture according to the present invention. Figure 4 This invention relates to a motor stator core pulling and shaping fixture. Figure 3 A three-dimensional image; Figure 5 This invention relates to a motor stator core pulling and shaping fixture. Figure 4 A structural diagram from below; Figure 6 This is a partial structural diagram of a motor stator core drawing and shaping fixture according to the present invention; Figure 7 This invention relates to a motor stator core pulling and shaping fixture. Figure 6 A structural diagram from below; Figure 8 This is an exploded view from multiple perspectives of the leveling and shrinking component of a motor stator core drawing and shaping fixture according to the present invention. Figure 9 This invention relates to a motor stator core pulling and shaping fixture. Figure 8 The front view; Figure 10 This is a side view of the leveling and shrinking component of a motor stator core drawing and shaping fixture according to the present invention. Figure 11 This invention relates to a motor stator core pulling and shaping fixture. Figure 4 Enlarged view of point A in the middle; Figure 12 This invention relates to a motor stator core pulling and shaping fixture. Figure 7 Enlarged view of point B in the middle.

[0016] In the diagram: 1. Drive clamping assembly; 101. Main drive pull rod; 102. Lower limit locking nut; 103. Iron core positioning ring; 104. Upper limit locking nut; 105. Top pressure positioning plate; 106. Limit adjustment slot; 2. Leveling and shrinking assembly; 201. Lower end positioning washer; 202. Inner side stabilizing support ring; 203. Upper end positioning washer; 204. Leveling movable plate; 205. Open type shrinking sleeve; 206. Annular embedded slot; 207. Elastic locking spring. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] Example: Figures 1-12 As shown, the present invention discloses a motor stator core pulling and shaping fixture, which consists of two core parts: a drive clamping assembly 1 and a leveling and shrinking assembly 2. The leveling and shrinking assembly 2 is coaxially and movably sleeved on the outside of the rod at the lower end of the drive clamping assembly 1. The two are coaxially arranged and nested together, resulting in a compact assembly structure and strong operational coordination. It can realize precise positioning, adjustable clamping, and efficient shaping of the motor stator core.

[0019] The specific structure of the drive clamping assembly 1: The drive clamping assembly 1 serves as the core of the tooling for power transmission and internal positioning. It is vertically positioned at the central axis of the tooling and includes a main drive pull rod 101, a lower limit locking nut 102, an iron core positioning ring 103, an upper limit locking nut 104, a top pressure positioning plate 105, and a limit adjustment slot 106.

[0020] The main drive tie rod 101 is a vertically extending cylindrical rod. Both the lower and upper sections of the rod are machined with matching external thread sections. The rod runs through the center of the tooling and its upper end is fixedly connected to the external drive equipment. It is used to transmit vertical downward and upward power and is the core transmission component of the entire tooling.

[0021] At the lower section of the main drive tie rod 101, there is a threaded connection to a lower limit locking nut 102. This nut adopts a hexagonal locking nut structure and achieves axial positioning through thread engagement. It is used to prevent the lower component from moving axially and plays a role in lower limit and anti-disengagement.

[0022] Directly above the lower limit locking nut 102, on the smooth part of the main drive rod 101, a core positioning ring 103 is movably sleeved. The core positioning ring 103 is a ring-shaped structure, and its outer circle size matches the inner hole of the stator core to be shaped. It serves as a positioning reference for the inner hole of the core, ensuring that the core remains coaxial with the tooling after being sleeved, and providing a precise reference for the outer circumference shaping.

[0023] Directly above the core positioning ring 103, at the external thread position of the upper section of the main drive rod 101, there is an upper limit locking nut 104 threadedly connected. This nut is compatible with the lower limit locking nut 102 in specifications, and the two form an upper and lower locking limit structure, which firmly restricts the core positioning ring 103 in the middle section of the main drive rod 101, preventing it from axial displacement or circumferential deflection during operation.

[0024] The main drive rod 101, lower limit locking nut, core positioning ring 103, and upper limit locking nut 104 are configured. The core positioning ring 103 is movably sleeved in the middle section of the main drive rod 101. The lower limit locking nut 102 and the upper limit locking nut 104 are respectively threaded onto the upper and lower threaded positions of the main drive rod 101, forming an upper and lower locking limit structure. This can stably limit the core positioning ring 103 to a fixed axial position, preventing vertical movement and circumferential deflection during operation. It provides a fixed and centered inner hole positioning reference for the stator core, ensuring stable coaxiality throughout the forming process and avoiding dimensional defects caused by eccentric forming.

[0025] A top pressure positioning plate 105 is fixedly mounted on the upper end of the main drive rod 101. The lower end face of the top pressure positioning plate 105 is tightly fitted with the upper end face of the upper limit locking nut 104. The upper end of the plate is used to bear the force of the external drive equipment. The bottom end face of the top pressure positioning plate 105 is provided with a semi-cut structure. A limit adjustment slot 106 is opened on the plate. By manually rotating the top pressure positioning plate 105, the bottom support surface of the plate can be adjusted slightly by means of the semi-cut structure and the guide cooperation of the limit adjustment slot 106. This allows it to adapt to stator cores of different sizes and specifications and complete the flexible adjustment of the clamping preload.

[0026] The top pressure positioning plate 105 and the limit adjustment slot 106 are designed. The top pressure positioning plate 105 has a limit adjustment slot 106 on its body and a half-cut structure at the bottom. By manually rotating the top pressure positioning plate 105, the limit adjustment slot 106 provides limit guidance, and the slope of the bottom half-cut surface changes, allowing for slight extension and contraction of the lower support surface. The pre-tightening stroke can be changed as needed to adapt to the shaping of stator cores with different stack thicknesses and similar inner diameters. There is no need to change the entire set of tooling, reducing the number of tooling components and the time required for production changeover and debugging. The purely mechanical rotation adjustment is simple in structure and stable and reliable in adjustment.

[0027] The specific structure of the leveling and shrinking assembly 2: The leveling and shrinking assembly 2 is movably sleeved on the lower end of the main drive pull rod 101 and located above the lower limit locking nut 102. It is arranged around the outside of the drive pressing assembly 1 and includes a lower positioning washer 201, an inner stabilizing support ring 202, an upper positioning washer 203, a leveling movable plate 204, an open shrink sleeve 205, an annular embedded groove 206, and an elastic locking spring 207.

[0028] The lower positioning washer 201 is an annular flat washer that is movably sleeved on the surface of the main drive tie rod 101 and is arranged close to the upper end of the lower limit locking nut 102. It is used to provide bottom support and end face leveling for the upper component, ensuring that the assembly end face is flat and preventing the component from tilting.

[0029] Above the lower positioning washer 201, an inner stabilizing support ring 202 is coaxially and movably sleeved. This ring is a cylindrical sleeve structure, which serves as the internal support reference for the outer peripheral component, ensuring the concentricity of the outer peripheral shaping component and the main drive tie rod 101, and avoiding radial offset.

[0030] Above the inner stabilizing support ring 202, an upper positioning washer 203 is coaxially and movably sleeved. The upper positioning washer 203 and the lower positioning washer 201 have the same size and structure. They correspond to each other and together form an axial limit for the inner stabilizing support ring 202 to prevent it from moving up and down.

[0031] The lower positioning washer 201, the inner stabilizing support ring 202, and the upper positioning washer 203 are sequentially fitted onto the outer side of the main drive tie rod 101 from top to bottom. The upper and lower positioning washers provide axial positioning and end face leveling for the inner stabilizing support ring 202, ensuring that the inner stabilizing support ring 202 always remains vertically centered. This provides a stable radial support reference for the outer peripheral shaping components, preventing the support structure from tilting or shifting during the shaping process and ensuring that multiple shaping components are subjected to force synchronously and evenly.

[0032] On the outer circumferential surface of the inner stabilizing support ring 202, multiple leveling movable plates 204 are evenly arranged in the circumferential direction. The multiple movable plates are arc-shaped and enclose to form a circular shaping structure, which can be opened and closed synchronously in the radial direction. During operation, they fit against the outer circumference of the iron core to achieve radial extrusion shaping.

[0033] The system features a set of leveling movable plates 204, which are arranged evenly in layers around the periphery. The bottom two layers of leveling movable plates 204 have downward convex surfaces, while the top two layers of leveling movable plates 204 have upward convex surfaces. The upper and lower concave and convex structures correspond and cooperate with each other, achieving uniform fit and stable guiding and limiting when pressure is applied. This makes the radial opening and closing movements of the multiple layers of leveling movable plates 204 more regular and synchronized. It can not only fit the outer circle of the stator core to complete the roundness correction, but also avoid local stress concentration, prevent the silicon steel sheets from chipping, misaligning and squeezing damage, and make the shaping and fitting more comfortable and the forming consistency better.

[0034] The outer periphery of multiple leveling movable plates 204 is fitted with an open-type shrink sleeve 205. The sleeve is a thin-walled elastic sleeve structure with a through-section on one side, which has radial elastic expansion and contraction capability. It can adaptively expand and contract with the opening and closing action of the leveling movable plates 204, and always covers the outside of the movable plates, playing a guiding and limiting role.

[0035] The outer circular surface of the open-type shrink sleeve 205 has an annular insert groove 206 along the circumference. The groove is a closed annular groove, and the groove width is adapted to the elastic locking spring 207. The elastic locking spring 207 is snapped into the annular insert groove 206. Using its own elastic contraction force, it continuously holds the open-type shrink sleeve 205 tightly, so that the inner wall of the sleeve always fits against the outer surface of the flat movable plate 204, while preventing the sleeve from falling off and realizing the elastic automatic reset after operation.

[0036] The system comprises a layered leveling movable plate 204, an open-type shrink sleeve 205, an annular embedded groove 206, and an elastic locking spring 207. The open-type shrink sleeve 205 is fitted around the outer periphery of the layered leveling movable plate 204. The annular embedded groove 206 is formed on the outer circumference of the open-type shrink sleeve 205, and the elastic locking spring 207 is fitted inside the annular embedded groove 206. When the layered leveling movable plate 204 opens and closes radially, the open-type shrink sleeve 205 expands and contracts adaptively, and the elastic locking spring 207 maintains a continuous clamping force. This not only prevents the sleeve from shifting or falling off, but also allows the entire assembly to automatically reset after pressure is released, eliminating the need for manual reset and making the operation process smoother and more continuous.

[0037] Before operation, the motor stator core to be shaped is coaxially fitted onto the outer surface of the core positioning ring 103 of the drive clamping assembly 1. Using the core positioning ring 103 as the inner hole reference, precise coaxial positioning of the core and the tooling is achieved, preventing eccentric offset during the shaping process. Based on the model, outer diameter, and clamping size requirements of the core to be shaped, the top pressure positioning plate 105 of the drive clamping assembly 1 is manually rotated. The semi-cut structure at the lower end of the top pressure positioning plate 105, in conjunction with the limit adjustment slot 106 on the plate body, provides guidance and limitation. During rotation, the bottom support surface of the top pressure positioning plate 105 achieves... The slight extension or retraction adjustment precisely adjusts the pre-clamping gap of the iron core, adapting to the clamping and shaping requirements of iron cores of different specifications. After adjustment, the top pressure positioning plate 105 remains fixed. At this time, the lower limit locking nut 102 and the upper limit locking nut 104 of the drive clamping assembly 1 always form an upper and lower locking limit on the iron core positioning ring sleeve 103, preventing the iron core positioning ring sleeve 103 from moving axially or rotating circumferentially along the main drive tie rod 101, ensuring the stability of the positioning reference. The main drive tie rod 101, as the core transmission rod, remains vertical, providing a stable power transmission path for subsequent downward pressing and shaping. When the external drive device is activated, it drives the main drive rod 101 of the drive clamping assembly 1 to perform a vertical pulling and pressing action. The top pressure positioning plate 105 moves downward synchronously with the main drive rod 101, transmitting uniform axial pressure sequentially to the upper limit locking nut 104, the iron core positioning ring 103, and the structures below. After the downward pressure is transmitted to the leveling and shrinking assembly 2, it first acts on the upper positioning washer 203. The upper positioning washer 203 then evenly transmits the pressure to the inner stabilizing support ring 202. The support ring 202 provides radial support for the outer circumference leveling movable plate 204, so that multiple leveling movable plates 204 are simultaneously subjected to axial extrusion force. Under the action of axial pressure, multiple leveling movable plates 204 converge radially towards the center of the tooling, and their inner arc surfaces are tightly attached to the outer circumference of the motor stator core, applying uniform and stable radial extrusion force to the core, forcing the outer circumference of the core to fit against the reference outer circle of the core positioning ring 103, and correcting defects such as roundness deviation, coaxiality deviation, end face tilting and loose lamination edge warping of the core in one go. During the radial retraction of the leveling movable plate 204, the open-type shrink sleeve 205 on the outer periphery is simultaneously squeezed outward. The open-type shrink sleeve 205 has an open section on one side and has radial elastic expansion and contraction capabilities. It expands outward adaptively with the retraction action of the leveling movable plate 204 to avoid squeezing and jamming. At this time, the elastic locking spring 207, which is engaged in the annular embedded groove 206 of the open-type shrink sleeve 205, opens elastically and stores elastic potential energy in sync with the expansion of the sleeve. At the same time, it always maintains elastic clamping force, so that the inner wall of the open-type shrink sleeve 205 continuously adheres to the outer surface of the leveling movable plate 204, preventing the sleeve from axial movement, circumferential displacement or falling off. The lower positioning washer 201 of the leveling and shrinking component 2 always provides bottom support and end face leveling for the inner stabilizing support ring 202. Together with the upper positioning washer 203, it ensures that the inner stabilizing support ring 202 and the leveling movable plate 204 are not tilted or misaligned during operation, further improving the shaping accuracy.

[0038] Once the core shaping meets the standard, the external drive equipment stops pressing down and drives the main drive rod 101 to rise vertically upward, completely eliminating the axial compressive force. At this time, the elastic locking spring 207 releases the previously stored elastic potential energy, automatically retracts and continuously grips the open-type shrink sleeve 205, causing the open-type shrink sleeve 205 to retract radially in sync, thereby pushing multiple leveling movable plates 204 to reset radially outward in sync, separating them from the outer circumferential surface of the stator core. After the reset is completed, each structure of the drive clamping assembly 1 returns to its initial position. The lower limit locking nut 102 and the upper limit locking nut 104 remain in the limiting state of the iron core positioning ring 103. The top pressure positioning plate 105 maintains the adjusted position. The shaped motor stator iron core can be directly removed to complete a single shaping operation cycle. There is no need to manually reset each structure before the next iron core shaping operation can be carried out.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A motor stator core drawing and shaping fixture, characterized in that, include: The driving clamping assembly (1) and the leveling shrinking assembly (2) are used for overall power transmission, axial locking and limiting, and stator core inner hole reference positioning. The leveling shrinking assembly (2) is coaxially sleeved on the outer side of the lower end of the driving clamping assembly (1) and is used for radial leveling of the outer circumference of the core, elastic shrinking and fitting, and anti-detachment reset.

2. The motor stator core drawing and shaping fixture according to claim 1, characterized in that, The drive clamping assembly (1) includes a main drive rod (101); the main drive rod (101) is vertically positioned at the center of the tooling, and a lower limit locking nut (102) is threadedly connected to the lower end surface of the main drive rod (101). A core positioning ring (103) is movably sleeved on the surface of the main drive rod (101) directly above the lower limit locking nut (102), and an upper limit locking nut (104) is threadedly connected to the upper end surface of the main drive rod (101) directly above the core positioning ring (103).

3. The motor stator core drawing and shaping fixture according to claim 2, characterized in that, The drive clamping assembly (1) further includes a top pressure positioning plate (105) and a limit adjustment slot (106); the top pressure positioning plate (105) is mounted on the upper end of the main drive pull rod (101), and a limit adjustment slot (106) is provided on the lower end of the plate body of the top pressure positioning plate (105).

4. The motor stator core drawing and shaping fixture according to claim 3, characterized in that, The leveling and shrinking assembly (2) includes a lower positioning washer (201), which is movably sleeved on the surface of the main drive rod (101) and located directly above the lower limit locking nut (102). An inner stabilizing support ring (202) and an upper positioning washer (203) are coaxially sleeved above the lower positioning washer (201), and the contact surfaces of the lower positioning washer (201), the inner stabilizing support ring (202) and the upper positioning washer (203) overlap each other.

5. The motor stator core drawing and shaping fixture according to claim 4, characterized in that, The outer surface of the inner stabilizing support ring (202) is axially and evenly arranged with multiple leveling movable plates (204). The outer periphery of the multiple leveling movable plates (204) is jointly fitted with an open-type shrink sleeve (205). The open-type shrink sleeve (205) has an open section on one side.

6. The motor stator core drawing and shaping fixture according to claim 5, characterized in that, The outer surface of the open-type shrink sleeve (205) is provided with an annular insert groove (206), and an elastic locking spring (207) is engaged inside the annular insert groove (206).

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