Permanent magnet rotor assembly and motor

Abstract

The invention discloses a permanent magnet rotor assembly and a motor. The permanent magnet rotor assembly comprises a plurality of permanent magnets, a rotor core assembly, a rotating shaft and a plastic-encapsulated body, the rotor core assembly comprises a mounting bracket and a plurality of magnetic conductive blocks, the mounting bracket comprises an annular end plate and a plurality of clamping blocks axially raised from one end surface of the annular end plate, a plurality of clamping blocks are distributed at intervals around the annular end plate, a clamping slot is formed in each magnetic conductive block, a plurality of magnetic conductive blocks are mounted by virtue of fit of the clamping blocks and the clamping slots and form a center hole, a radial groove is formed between every two adjacent magnetic conductive blocks, the permanent magnets are nested in the radial grooves respectively, the rotating shaft passes through the center hole, and the plastic-encapsulated bodyplastically encapsulates the rotating shaft, a plurality of permanent magnets, the mounting bracket and a plurality of magnetic conductive blocks into a whole. The permanent magnet rotor assembly disclosed by the invention fixes a plurality of magnetic conductive blocks and a plurality of permanent magnets by utilizing the mounting bracket, the whole structural strength is good, deformation is hardly caused, injection moulding quality is good, production efficiency is high, and rejection rate is extremely low.

Description

Technical field: [0001] The invention relates to a permanent magnet rotor assembly and a motor. Background technique: [0002] like figure 1 As shown, the conventional permanent magnet rotor assembly includes: a permanent magnet 1a and a rotor core 2a, the rotor core 2a includes an annular ring 22a provided with a central shaft hole 21a and a number of magnetic conductive blocks protruding from the outside of the annular ring 22a 23a, a radial groove 24a is formed between two adjacent magnetic conductive blocks 23a, and the permanent magnet 1a is embedded in the radial groove 24a. This structure has the following disadvantages: 1) the rotating shaft is installed in the central shaft hole 21a, and the rotating shaft is rigidly connected with the annular ring 22a, resulting in poor shock absorption; 2) the rotor core 2a has a large diameter, many consumables, and heavy weight, resulting in high cost. [0003] In view of this, in order to solve the existing technical problems...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a permanent magnet rotor assembly and a motor to solve the problem of poor injection molding quality, low production efficiency and high scrap rate caused by the weak combination of the magnetic block and the permanent magnet of the permanent magnet rotor assembly in the prior art question

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