Vibration attenuation and noise reduction pad and motor installation structure of range hood

Abstract

The invention relates to a vibration attenuation and noise reduction pad. The vibration attenuation and noise reduction pad comprises a columnar body (1); an axially perforative through hole (3) through which an installation screw (2) passes is formed in the body; an annular groove (4) is formed on the peripheral surface of the middle part of the body (1); the vibration attenuation and noise reduction pad is characterized in that: a plurality of radial gaps (5) are formed on at least one of the upper end face and the lower end face of the body (1) at intervals along the circumference; each radial gap (5) radially perforates through the circumferential wall of the body (1); the radial gaps divide the contact surface into a plurality of small elastic units, so the contact area between the body 1 and a connected body is reduced; when the body (1) is screwed and squeezed by the screw, a connecting force is dispersed to each independent elastic unit; at the moment, the vibration produced by a connected component can be stopped and absorbed by the elastic units, so the vibration energy transmitted to a thin plate shell is effectively reduced; and particularly, when the vibration attenuation and noise reduction pad is applied to a system in the class of fans, aims of reducing vibration and attenuating noise can be fulfilled effectively.

Description

technical field [0001] The invention relates to a vibration-absorbing and noise-absorbing pad and a motor installation structure of a range hood provided with the vibration-absorbing and noise-absorbing pad. Background technique [0002] Taking range hood products as an application example, the range hood fan system is mainly composed of three major components: a volute, a motor, and an impeller. Generally, the motor is directly fixed on the volute by screws. However, since the volute is usually made of a thin plate, when the motor drives the impeller to run at high speed, it will vibrate. The noise increases when the machine is running, and when it is serious, it shakes due to instability, and the level of noise is an important indicator to measure the quality of the range hood. Therefore, in order to achieve the vibration reduction effect, it is usually achieved by adding rubber pads and spring pads between the motor and the volute motor bracket connected to the motor. F...

AI Technical Summary

Problems solved by technology

Because the frequency of this kind of sound is mostly in the middle and low frequency, and the sound penetration is strong, the human body feels very uncomfortable, and the treatment is relatively difficult

[0004] Although the existing vibration damping pads can play a role in damping vibration, they cannot silence the electromagnetic sound generated by the motor. However, the scheme of trying to improve the quality of power supply through capacitor and inductance filter circuits is large in size and high in cost. The application on the home appliances of mobile phones is also greatly restricted, and the scope of governance is limited

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