Stator iron core circle splicing tool

Abstract

The utility model discloses a stator iron core circle splicing tool, and relates to the field of motor manufacturing. The stator iron core is composed of a plurality of stator iron core units, each stator iron core unit is composed of a stator magnet yoke, a winding section and a stator wide portion, the outer end face of each stator magnet yoke is in an arc shape, the inner end face of each stator wide portion is in an arc shape, and the circle splicing tool comprises a tool body which comprises a circular outer wall and an inner cylinder. The circular outer wall and the inner cylinder are concentrically arranged on the bottom plate, an annular accommodating space is formed among the circular outer wall, the inner cylinder and the bottom plate, the accommodating space is used for accommodating the stator iron core, the inner side of the circular outer wall abuts against the outer side of the stator magnet yoke, and the outer side of the inner cylinder abuts against the outer side of the stator wide part. By using the circle splicing tool, the stator iron core can be spliced conveniently and quickly, the inner diameter and the outer diameter of the stator after circle splicing are ensured to meet the requirements, and later hot jacket and glue pouring are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing, and in particular to a tooling for assembling stator cores into circles. Background Technology

[0002] To optimize material utilization, manufacturing feasibility, and electromagnetic performance, the stator core employs a splicing process during manufacturing. Due to the large diameter of the stator in large motors, using a single circular structure would not only generate significant waste material during silicon steel sheet stamping, increasing costs, but also pose challenges to mold design and stamping equipment. Therefore, by disassembling the core into multiple fan-shaped laminations and splicing them together, material utilization is significantly improved, and piecework manufacturing and transportation are facilitated, making it particularly suitable for large equipment such as wind power and industrial motors. Furthermore, the splicing structure disperses thermal expansion stress, preventing overall deformation, and ensures uniform air gap—insufficient core roundness leads to uneven magnetic field distribution, causing additional losses, vibration, or noise, directly affecting motor efficiency and lifespan.

[0003] In the lamination assembly process, tooling positioning technology plays a crucial role. The structure within the ring-shaped tooling eliminates the cumulative errors from manual assembly, strictly controlling the roundness of the stator's inner and outer circles (typically requiring ≤0.05mm), ensuring a uniform air gap for subsequent rotor assembly. The tooling not only significantly improves efficiency, enabling rapid alignment and standardized assembly of laminations, but also reduces manual intervention. From a cost perspective, the tooling reduces rework and scrap rates through precision control at the source, and its modular design allows for adaptation to stators of different specifications, further expanding application flexibility. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a stator core assembly tooling. By using this tooling, stator cores can be assembled conveniently and quickly, ensuring that the inner and outer diameters of the assembled stator meet the requirements, which facilitates subsequent heat fitting and glue application.

[0005] To achieve the above objectives, this application discloses a stator core assembly tooling. The stator core is composed of multiple stator core units, each stator core unit consisting of a stator yoke, a winding segment, and a stator width portion. The outer end face of the stator yoke is arc-shaped, and the inner end face of the stator width portion is arc-shaped. The assembly tooling includes a tooling body, which includes a circular outer wall and an inner cylinder. The circular outer wall and the inner cylinder are concentrically disposed on a base plate. An annular receiving space is formed between the circular outer wall, the inner cylinder, and the base plate. The receiving space is used to receive the stator core, and the inner side of the circular outer wall abuts against the outer side of the stator yoke, while the outer side of the inner cylinder abuts against the outer side of the stator width portion.

[0006] Furthermore, the height of the inner cylinder is higher than the height of the upper edge of the outer circular wall.

[0007] Furthermore, an annular protrusion is provided on the inner side of the circular outer wall.

[0008] Beneficial effects of the technical solution of this utility model

[0009] This application's stator core assembly fixture significantly improves assembly efficiency and process adaptability through innovative design: A dual-reference constraint structure: The circular outer wall and inner cylinder form a bidirectional positioning reference. The inner side of the outer wall constrains the stator yoke outline, while the outer side of the inner cylinder abuts against the inner arc surface of the stator's wide section, achieving synchronous calibration of the inner and outer diameters. This design can offset the cumulative error during unit assembly, ensuring an overall roundness tolerance ≤0.05mm. Secondary positioning with an annular boss: The annular boss on the inner side of the outer wall forms an axial limiting surface, preventing radial displacement of the yoke unit and providing assembly guidance, allowing operators to complete initial positioning simply by pushing along the boss. Using this assembly fixture, stator cores can be assembled conveniently and quickly, ensuring that the inner and outer diameters of the assembled stator meet requirements, facilitating subsequent heat fitting and glue application. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the stator core unit of this utility model;

[0012] Figure 2 This is a schematic diagram of the stator core structure of this utility model;

[0013] Figure 3 This is a diagram showing the usage state of the stator core assembly tooling of this utility model;

[0014] Figure 4 This is a schematic diagram of the stator core assembly tooling of this utility model;

[0015] Figure 5 This is a cross-sectional view of the stator core assembly tooling of this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] Stator core unit-100, stator yoke-101, winding segment-102, stator wide section-103, assembly tool body-200, circular outer wall-201, inner cylinder-202, base plate-203, annular boss-204 Detailed Implementation

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] refer to Figure 1-5 A stator core assembly tooling is provided, wherein the stator core is composed of multiple stator core units 100, each stator core unit 100 consisting of a stator yoke 101, a winding segment 102, and a stator width portion 103. The outer end face of the stator yoke 101 is arc-shaped, and the inner end face of the stator width portion 103 is arc-shaped. The assembly tooling includes a tooling body 200, which includes a circular outer wall 201 and an inner cylinder 202. The circular outer wall 201 and the inner cylinder 202 are concentrically disposed on a base plate 203. An annular receiving space is formed between the circular outer wall 201, the inner cylinder 202, and the base plate 203. The receiving space is used to receive the stator core, and the inner side of the circular outer wall 201 abuts against the outer side of the stator yoke 101, and the outer side of the inner cylinder 202 abuts against the outer side of the stator width portion 103.

[0021] This stator core assembly fixture achieves high-precision assembly and improved manufacturing efficiency through multi-component collaborative design and process adaptability optimization. Its core structure consists of a circular outer wall 201, an inner cylinder 202, a base plate 203, and an annular boss 204. Each component has a clear division of labor and complementary functions. The circular outer wall and inner cylinder are arranged concentrically, forming an annular accommodating space. The inner side of the outer wall constrains the outer diameter of the stator yoke 101 through an arc-shaped contact surface, while the outer side of the inner cylinder abuts against the inner arc surface of the stator width portion 103, forming a bidirectional positioning reference. This double-arc constraint mechanism can simultaneously calibrate the inner and outer contours of the stator core, offsetting angular offsets and cumulative errors during unit assembly, ensuring overall roundness is controlled within ≤0.05mm. The annular boss further enhances positioning accuracy; its axial limiting function prevents stator unit tilting and provides guidance for assembly. During operation, only pushing the unit along the boss is needed to complete initial alignment, significantly improving assembly efficiency.

[0022] Furthermore, the height of the inner cylinder 202 is higher than the height of the upper edge of the circular outer wall 201. An annular boss 204 is provided on the inner side of the circular outer wall 201.

[0023] To address the specific requirements of the heat-fitting and potting processes, the tooling structure was specifically optimized. The design of the inner cylinder exceeding the outer wall height provides radial expansion space for the stator core during heat fitting. Combined with alloy steel material whose thermal expansion coefficient matches that of the stator material, this ensures synchronous expansion of the tooling and stator under high-temperature conditions of 200-300℃, reducing the risk of ellipticity deviations caused by thermal stress. During the potting stage, the height difference between the inner cylinder and the outer wall forms a stepped adhesive channel barrier. Combined with the sealing plane of the base plate 203, this precisely constrains the adhesive flow range, ensuring a uniform distribution of the 5-8mm adhesive layer thickness. The chamfered design of the annular boss guides the adhesive flow to the winding segment 102, reducing air bubble formation.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stator core assembly tooling, wherein the stator core is composed of multiple stator core units (100), each stator core unit (100) comprising a stator yoke (101), a winding segment (102), and a stator wide section (103), wherein the outer end face of the stator yoke (101) is arc-shaped, and the inner end face of the stator wide section (103) is arc-shaped, characterized in that: The circular assembly fixture includes a fixture body (200), which includes a circular outer wall (201) and an inner cylinder (202). The circular outer wall (201) and the inner cylinder (202) are co-centered on a base plate (203). An annular receiving space is formed between the circular outer wall (201), the inner cylinder (202) and the base plate (203). The receiving space is used to receive the stator core. The inner side of the circular outer wall (201) abuts against the outer side of the stator yoke (101), and the outer side of the inner cylinder (202) abuts against the outer side of the stator wide portion (103).

2. The stator core assembly tooling according to claim 1, characterized in that: The height of the inner cylinder (202) is higher than the height of the upper edge of the circular outer wall (201).

3. The stator core assembly tooling according to claim 1, characterized in that: An annular boss (204) is provided on the inner side of the circular outer wall (201).

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