Permanent magnet brushless inner rotor evaporative fan rotor press bearing tooling

By designing a permanent magnet brushless internal rotor evaporator fan rotor pressure bearing fixture with components such as guide columns and limit columns, synchronous movement of the rotor core backrest was achieved, solving the problem of the rotor core backrest being unable to move, improving pressing accuracy and adaptability, and ensuring operational safety and product quality.

CN224596319UActive Publication Date: 2026-08-04SUZHOU SHUANGHANG ELECTRICAL CO LTD
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Patent Information

Application Number
CN202521351296.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2026-08-04
Estimated Expiration
2035-06-30

AI Technical Summary

Technical Problem

Existing press-fitting fixtures for permanent magnet brushless DC motors cannot move the rotor core back when faced with rotors of special structures, resulting in poor press-fitting accuracy and adaptability, especially for long-shaft rotors.

Method used

A rotor pressing bearing fixture for a permanent magnet brushless internal rotor evaporator fan was designed, including components such as guide columns, positioning clamps, springs, and limit columns, to achieve synchronous movement of the rotor core backrest. The accurate pressing of the ball bearing is ensured by precise positioning of the rotating shaft push rod and the bearing top core sleeve.

Benefits of technology

It improves pressing accuracy and production efficiency, solves the compatibility problem of traditional tooling on rotors with special structures, and ensures operational safety and product quality.

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Abstract

A bearing pressing fixture for a permanent magnet brushless internal rotor evaporator fan, belonging to the field of permanent magnet brushless DC motor manufacturing, includes a lower base, a core backrest connecting plate, an upper pressure plate, and a lower pressure spring. The lower base is equipped with a guide post, a rotating shaft push rod, and a bearing top sleeve. The core backrest connecting plate and the upper pressure plate are sleeved on the guide post, with springs between them and between them and the lower base. The bottom of the upper pressure plate is equipped with a second rotating shaft push rod, a second bearing top sleeve, and a lower pressure spring. Its advantages lie in its safe and reliable structure, solving the problems of the core backrest being unable to move and the poor adaptability of long-shaft rotors when pressing rotors with traditional fixtures. Through the cooperation of various components, high-precision bearing pressing is achieved, improving pressing accuracy and production efficiency. It is suitable for solving bearing pressing problems in special working conditions where the rotor core backrest needs to move with the pressing action.
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