Vibration reduction rotor assembly and motor

Abstract

The invention discloses a vibration reduction rotor assembly and a motor. The vibration reduction rotor assembly comprises a rotor iron core, a permanent magnet, a rotating shaft and a first end vibration reduction piece. The rotor core is provided with magnet grooves and a rotating shaft hole. The permanent magnets are arranged in the magnet grooves. A rotating shaft is arranged in the rotating shaft hole. The first end and the second end of the rotating shaft extend out of the rotating shaft hole. A gap is formed between the rotating shaft and the rotor core. The first end part vibration reduction piece is arranged on the first end surface of the rotor iron core and is connected with the rotor iron core. On the axial direction of the rotor core, the first end of the permanent magnet extends out of the magnet groove and is matched in the first end vibration reduction piece or the first end of the permanent magnet retracts into the magnet groove so that one part of the first end vibration reduction piece can be matched in the magnet groove, and the first end vibration reduction piece is directly matched with the rotating shaft or matched with the rotating shaft through a first transmission piece arranged in the first end vibration reduction piece. According to the vibration reduction rotor assembly, the material amount of the vibration reduction part can be increased, the vibration reduction performance is good, and the vibration noise is low.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a vibration-damping rotor assembly and a motor with the vibration-damping rotor assembly. Background technique [0002] As the power density of the motor increases, the energy density of the motor increases, and the magnetic field of the motor tends to be deeply saturated, resulting in an increase in electromagnetic noise. In related technologies, in order to reduce the electromagnetic vibration and noise caused by torque fluctuations during the operation of the motor, damping materials are usually filled between the rotor core and the shaft or sleeve to absorb electromagnetic force waves, so as to reduce the noise of the motor and realize Vibration reduction. In the related art, by filling the vibration-absorbing material between the rotor core and the rotating shaft or the shaft sleeve, the effects of noise reduction and vibration reduction are relatively poor and need to be im...

AI Technical Summary

Problems solved by technology

On the other hand, the material of the injection molded part is different from that of the vibration damping ring, and the vibration damping ring at the end of the outer core is not connected. The boundary surface between the injection molded part and the vibration damping ring is prone to gaps, and it is easy to cause thermal expansion and other coefficients during operation. reliability problems, and the damping of injection molded parts is small, and the suppression effect on electromagnetic vibration noise is not obvious

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