A fool-proof tool for magnetic steel installation
By designing a foolproof fixture and utilizing the magnetic interaction between the foolproof magnet and the rotating shaft, the problem of identifying the polarity of the magnet was solved, thereby improving the accuracy of magnet installation and the stability of motor performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG JINGCHUAN PRECISION MASCH CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-23
AI Technical Summary
In the manufacturing of permanent magnet motors, the difficulty in identifying the polarity of the magnets leads to quality risks associated with reverse polarity assembly. Traditional quality control methods are insufficient to achieve zero-defect control, affecting the consistency and reliability of product performance.
Design a foolproof tooling, including a base plate and a positioning guide groove, with foolproof devices on both sides. The magnetic interaction between the foolproof magnet and the rotating shaft will indicate the installation direction of the magnet by repulsion or attraction, ensuring correct assembly.
This improves the accuracy of magnet installation, avoids incorrect assembly, and enhances the quality and stability of motor products.
Smart Images

Figure CN224401340U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tooling technology, specifically to a foolproof tooling for installing magnets. Background Technology
[0002] In the manufacturing process of permanent magnet motors, magnet assembly is a critical process that directly affects product performance. Operators must embed N / S polarity magnets into the rotor unit, which has already undergone core-shaft assembly, according to a predetermined orientation. However, in actual operation, due to the difficulty in identifying magnet polarity and the limitations of manual operation, there is a potential quality hazard of reverse polarity assembly. Such process deviations will cause magnetic field distortion during motor operation, leading to abnormal operating conditions such as torque fluctuations and efficiency reduction, seriously affecting the consistency and reliability of product performance. Traditional quality control methods relying on visual inspection are insufficient to achieve zero-defect control of polarity assembly, necessitating process optimization to improve manufacturing process stability. Utility Model Content
[0003] The purpose of this utility model is to provide a foolproof tooling for installing magnets, addressing the shortcomings and deficiencies of existing technologies.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a foolproof fixture for installing magnets, comprising a base plate, on which multiple positioning guide grooves are arranged in a circular array. Its innovation lies in that foolproof devices are provided on both the left and right sides of the positioning guide grooves; each foolproof device includes a bearing, inside which a rotating shaft is longitudinally arranged, and a sliding plate is provided at the top of the rotating shaft. A foolproof magnet is fixedly arranged on the sliding plate. When the positioning guide groove is passed through by the motor magnet from top to bottom, if the magnet has the same magnetic properties as the foolproof magnet, they repel each other. The foolproof magnet is tilted under the action of the rotating shaft; if the magnet has different magnetic properties from the foolproof magnet, they attract each other. The foolproof magnet is perpendicular to the motor magnet under the action of the rotating shaft.
[0005] Furthermore, limiting posts are provided on the left and right sides of the foolproof magnet, and the limiting posts are made of nylon.
[0006] Furthermore, the bearing is a nylon bearing, and both the shaft and the slide are made of nylon.
[0007] Furthermore, the foolproof magnet is fixed to the slide plate by adhesive bonding.
[0008] Furthermore, the positioning guide groove includes at least two foolproof devices on its left and right sides.
[0009] Furthermore, a positioning ring is provided at the bottom of the substrate.
[0010] The beneficial effects of this utility model after adopting the above structure are as follows:
[0011] This invention provides a foolproof device to guide the installation of motor magnets, preventing installation errors and thus improving the quality of the motor. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 This is a top view of the present invention.
[0014] Explanation of reference numerals in the attached figures:
[0015] 1. Base plate, 2. Positioning guide groove, 3. Anti-foolproof device, 31. Bearing, 32. Rotary shaft, 33. Slide plate, 34. Anti-foolproof magnet, 4. Limiting post, 5. Positioning ring. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings.
[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model.
[0018] See Figure 1 A foolproof fixture for installing magnets includes a base plate 1. Multiple positioning guide grooves 2 are arranged in a circular array on the base plate 1. Foolproof devices 3 are provided on both the left and right sides of the positioning guide grooves 2. The foolproof device 3 includes a bearing 31. A rotating shaft 32 is arranged longitudinally inside the bearing 31. A sliding plate 33 is arranged on the top of the rotating shaft 32. A foolproof magnet 34 is fixedly arranged on the sliding plate 33. When the positioning guide groove 2 is passed through by the motor magnet from top to bottom, if the magnet has the same magnetic properties as the foolproof magnet 34, they will repel each other. The foolproof magnet 34 is tilted under the action of the rotating shaft 32. If the magnet has different magnetic properties from the foolproof magnet 34, they will attract each other. The foolproof magnet 34 is perpendicular to the motor magnet under the action of the rotating shaft 32. Specifically, when the motor magnet is positioned above the positioning guide groove 2 and is about to pass through it, the motor magnet passes through the anti-mistake device 3. If the magnetism of one end of the anti-mistake magnet 34 is the same as that of the other end, they repel each other, and the anti-mistake magnet 34 is flipped by the rotating shaft 32 and tilted, thus reminding the staff that the motor magnet is installed backwards. If the magnetism of one end of the anti-mistake magnet 34 is different from that of the other end, they attract each other, and the anti-mistake magnet 34 is perpendicular to the motor magnet by the rotating shaft 32, thus reminding the staff that the motor magnet is installed correctly. Of course, the repulsion and attraction can also be reversed to provide a reminder.
[0019] In this embodiment, limiting posts 4 are provided on the left and right sides of the foolproof magnet 34. The limiting posts 4 are made of nylon. On the one hand, they are to prevent adverse effects on the foolproof magnet 34. On the other hand, they are to prevent the foolproof magnet 34 from overturning and affecting the judgment.
[0020] In this embodiment, the bearing 31 is a nylon bearing, and the shaft 32 and the slide plate 33 are both made of nylon to prevent adverse effects on the foolproof magnet 34.
[0021] In this embodiment, the foolproof magnet 34 is fixed to the slide plate 33 by adhesive bonding, avoiding the use of bolts for fixing, thus preventing adverse effects on the foolproof magnet 34.
[0022] In this embodiment, the positioning guide groove 2 includes at least two foolproof devices 3 on its left and right sides. When one foolproof device 3 is damaged, the other foolproof device 3 can still be used normally, thereby ensuring the normal use of the tooling; at the same time, the reminder effect of multiple foolproof devices 3 is more prominent.
[0023] In this embodiment, a positioning ring 5 is provided at the bottom of the substrate 1. The positioning ring 5 is used to match the rotor, which facilitates the installation of the motor magnets.
[0024] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A fool-proof tool for magnetic steel installation, comprising a base plate, a plurality of positioning guide slots are arranged in a circular array on the base plate, characterized in that: Anti-foolproof devices are provided on both the left and right sides of the positioning guide groove. The anti-foolproof device includes a bearing, a rotating shaft is arranged longitudinally inside the bearing, a slide plate is arranged on the top of the rotating shaft, and an anti-foolproof magnet is fixedly arranged on the slide plate. When the positioning guide groove is passed through by the motor magnet from top to bottom, if it has the same magnetic properties as the anti-foolproof magnet, they will repel each other. The anti-foolproof magnet is tilted under the action of the rotating shaft. If it has different magnetic properties from the anti-foolproof magnet, they will attract each other. The anti-foolproof magnet is perpendicular to the motor magnet under the action of the rotating shaft.
2. The fool-proof tool for magnetic steel mounting according to claim 1, characterized in that: The foolproof magnet has limiting posts on both sides, and the limiting posts are made of nylon.
3. The fool-proof tool for magnetic steel mounting according to claim 1, characterized in that: The bearing is a nylon bearing, and both the shaft and the slide are made of nylon.
4. The fool-proof tool for magnetic steel mounting according to claim 1, characterized in that: The foolproof magnet is fixed to the slide plate by adhesive bonding.
5. The fool-proof tool for magnetic steel mounting according to claim 1, characterized in that: The positioning guide groove includes at least two foolproof devices on its left and right sides.
6. The foolproof fixture for installing magnets according to claim 1, characterized in that: A positioning ring is provided at the bottom of the substrate.