Minitype rotary oscillation motor based on resonance

Abstract

A minitype rotary oscillation motor based on resonance is mainly composed of a motor outer shell, a motor front end cover, a motor rear end cover, a permanent magnet set, a front end bearing, a rear end bearing, a rotor shaft, a rotor core, a rotor winding and an elastic shaft. The front end and the rear end of the rotor shaft are mounted in the front end bearing and the rear end bearing respectively, the front end of the elastic shaft is fixedly connected to the rear end of the rotor shaft, and the rear end of the elastic shaft is fixedly mounted in the motor rear end cover. The elastic shaft of the minitype rotary oscillation motor generates elastic deformation along with the rotation of the rotor shaft, and the inherent frequency of the motor can be changed by adjusting the structure size of the elastic shaft; when alternating currents run through the rotor, an alternating magnetic field can be generated, the alternating magnetic field interacts with the adjacent permanent magnet set to enable the rotor shaft to rotate and oscillate, the frequency of the alternating currents is adjusted to be close to the inherent frequency of the motor, the motor can rotate and oscillate about a resonance frequency, output power is large, and energy conversion efficiency is high.

Description

technical field [0001] The present invention relates to a small rotary swing motor based on resonance, which is especially suitable for electric toothbrush or electric shaver. Background technique [0002] The traditional rotary swing motor often adopts the mechanical structure of eccentric wheel, which has low vibration frequency, short service life and high noise. Chinese patent (patent number: 200620062958.4) discloses a high-frequency vibration motor: coils are wound on two wire racks, several permanent magnets are installed below and above the coils, and the wire racks, coils and permanent magnets are fixedly installed in the motor housing The inner wall of the motor rotor shaft is equipped with an iron core, and the iron core and the coil are installed adjacent to each other. When the alternating current passes through the coil, an alternating magnetic field will be generated, thereby driving the motor rotor to rotate and vibrate; the high-frequency motor, because the ...

AI Technical Summary

Problems solved by technology

[0002] The traditional rotary swing motor often adopts the mechanical structure of eccentric wheel, which has low vibration frequency, short service life and high noise

Chinese patent (patent number: 200620062958.4) discloses a high-frequency vibration motor: coils are wound on two wire racks, several permanent magnets are installed below and above the coils, and the wire racks, coils and permanent magnets are fixedly installed in the motor housing The inner wall of the motor rotor shaft is equipped with an iron core, and the iron core and the coil are installed adjacent to each other. When the alternating current passes through the coil, an alternating magnetic field will be generated, thereby driving the motor rotor to rotate and vibrate; the high-frequency motor, because the coil is fixed Installed in the motor casing, it is not easy to miniaturize the structure; in addition, the rotor shaft of the motor is movably installed in the front and rear two bearings. Due to the inertia of the rotor, when the alternating magnetic field changes, the rotor cannot respond synchronously and quickly. The result is Small swing range, limited output power

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