Rotor assembly and motor

Abstract

The invention discloses a rotor assembly and a motor, and the rotor assembly comprises a rotor iron core, a permanent magnet, a rotating shaft, a first end vibration damping piece and a first transmission piece, wherein the rotor iron core is provided with a magnet groove and a rotating shaft hole; the permanent magnets are arranged in the magnet grooves; the rotating shaft is arranged in the rotating shaft hole, a gap is formed between the rotating shaft and the rotor core, and the first end and the second end of the rotating shaft extend out of the rotating shaft hole; the first end part vibration damping piece is arranged on the first end surface of the rotor iron core and is connected with the rotor iron core; the transmission piece is arranged in the first end vibration damping piece,the first transmission piece is matched with the rotating shaft, and the rotor iron core drives the rotating shaft at least through the first end vibration damping piece and the first transmission piece in sequence. According to the rotor assembly provided by the embodiment of the invention, the material amount of the vibration reduction part is large, the noise reduction and vibration reductioneffects are good, 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 with the 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 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 pr...

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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