Rotor structure and motor comprising same

Abstract

The invention discloses a rotor structure and a motor comprising the same. The rotor structure comprises a rotor shaft and a permanent magnet, the rotor shaft comprises a permanent magnet mounting part, the permanent magnet sleeves the permanent magnet mounting part and is bonded to the permanent magnet mounting part, a binding agent accommodating space is formed between the outer wall surface ofthe permanent magnet mounting part and the inner wall surface of the permanent magnet, matching structures are arranged on the outer wall surface of the permanent magnet mounting part and / or the innerwall surface of the permanent magnet, and the matching structures make the radial distance between the outer wall surface of the permanent magnet mounting part and the inner wall surface of the permanent magnet be inconstant. According to the invention, by arranging the matching structures on the permanent magnet mounting part of the rotor shaft and / or the inner wall of the permanent magnet, thedistance between the outer wall surface of the permanent magnet mounting part and the inner wall surface of the permanent magnet is variable. On the parts with larger distances, enough accommodating and expansion spaces are provided for the binding agent, and the permanent magnet is cracked due to adhesive expansion is avoided; on the parts with smaller distances, the permanent magnet cooperates with the permanent magnet mounting part, and the coaxiality of the permanent magnet and the permanent magnet mounting part can be improved.

Description

technical field [0001] The invention relates to the technical field related to motors, in particular to a rotor structure and a motor including the same. Background technique [0002] The rotor is an important part of the motor, and its precision level directly affects the performance of the motor. The servo motor has high control precision and good performance, so it requires higher precision of the rotor. [0003] The traditional surface-mount magnetic ring rotor structure uses glue to bond the circular rotor shaft and the magnetic ring together to prevent the permanent magnet from moving. However, this rotor shaft structure has the following disadvantages: [0004] 1. When a small gap is used between the magnetic ring and the rotor shaft, the magnetic ring may burst due to the expansion of the glue solidification; [0005] 2. When a large gap is used between the magnetic ring and the rotor shaft, the coaxiality of the magnetic ring and the rotor shaft is poor, and the ma...

AI Technical Summary

Problems solved by technology

[0004] 1. When a small gap is used between the magnetic ring and the rotor shaft, the magnetic ring may burst due to the expansion of the glue solidification;

[0005] 2. When a large gap is used between the magnetic ring and the rotor shaft, the coaxiality of the magnetic ring and the rotor shaft will be poor, and the matching accuracy will be low;

[0006] 3. When the coaxiality of the magnetic ring and the rotating shaft is poor, the air gap of the motor will be uneven, resulting in unilateral magnetic pull, which will affect the control accuracy of the motor

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