Rotor assembly and motor with rotor assembly

Abstract

The invention discloses a rotor assembly and a motor. The rotor assembly comprises a rotor core, a permanent magnet, a rotating shaft, a structural member, a first transmission member and a vibrationdamping member. The rotor core is provided with a magnet groove and a rotating shaft hole. The permanent magnet is arranged in the magnet groove; the rotating shaft is arranged in the rotating shaft hole and a gap is formed between the rotating shaft and the rotor core; the rotor core is arranged in the structural member; the first transmission member is matched with the rotating shaft and locatedon the outer side of the first end of the rotor core, a vibration reduction gap is formed among the first transmission member, the rotor core and the structural member, and the vibration reduction gap comprises a first end vibration reduction gap located between the peripheral surface of the first transmission member and the structural member; the vibration damping member is arranged in the vibration damping gap, the vibration damping member comprises a first end vibration damping member located in the first end vibration damping gap, and the rotor core drives the rotating shaft through the structural member, the vibration damping member and the first transmission member in sequence. According to the rotor assembly, the filling amount of the vibration reduction member can be increased, the vibration reduction performance is improved, the vibration noise is reduced, and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor assembly and a motor. 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 For vibration reduction, however, by filling the vibration-absorbing material between the rotor core and the rotating shaft or the shaft sleeve, the effect of noise reduction and vibration reduction is not good and needs to be improved. Contents of the invention [0003] The present invention is based...

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Problems solved by technology

[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, however, by filling the vibration-absorbing material between the rotor core and the shaft or sleeve, the effect of noise reduction and vibration reduction is not good, and needs to be improved

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