Permanent magnet motor rotor outer diameter measuring device

By designing a full-angle measuring device and combining electronic displacement detection and placement wheel adjustment, the problem of insufficient dynamic adaptability of permanent magnet motor rotor outer diameter measuring device was solved, and accurate measurement of different rotor sizes was achieved.

CN224382454UActive Publication Date: 2026-06-19WUHAN DALUO TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
WUHAN DALUO TECH CO LTD
Filing Date
2025-08-22
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing permanent magnet motor rotor outer diameter measuring devices can only measure at one angular position and cannot adjust the measurement position in real time, resulting in a lack of dynamic adaptability during the measurement process and an inability to cope with dimensional changes caused by manufacturing errors and differences in the thickness of the bonding resin for the magnets.

Method used

A measuring device is designed, comprising a fixed frame, a rotating frame, a measuring component, a placement device, and a limiting device. By rotating and axially moving the rotating frame, combined with an electronic displacement detector and a contact wheel, full-angle measurement can be achieved. By adjusting the distance of the placement wheel and changing the size of the placement wheel, it can adapt to different rotor sizes.

Benefits of technology

It enables full-angle measurement of permanent magnet motor rotors, solves the problem of single-point measurement error, adapts to different rotor sizes, and ensures the comprehensiveness and accuracy of measurement.

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Abstract

This utility model discloses a permanent magnet motor rotor outer diameter measuring device, belonging to the technical field of measuring devices. The measuring device includes: a fixed frame; a rotating frame, one end of which is rotatably connected to one end of the top of the fixed frame, and a limiting device for restricting the rotation of the rotating frame is installed at the other end of the top of the fixed frame; a measuring component, installed at the bottom of the rotating frame; and a placement device, installed at the bottom inside the fixed frame. The measuring component includes: a first telescopic member, the top of which is fixed to the bottom of the rotating frame. This utility model, through the design of the measuring component, allows the permanent magnet motor rotor to rotate during testing, thereby achieving full-angle measurement and solving the single-point measurement error problem of traditional devices. A contact wheel, in conjunction with a first spring damper, maintains constant pressure against the rotor surface, and an electronic displacement detector records minute displacements in real time, thus achieving full coverage of the measurement position.
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