Extractor hood with function of reducing vibration and noise

Abstract

The invention relates to the technical field of machinery, in particular to an extractor hood with a function of reducing vibration and noise. A volute of a worm assembly is connected with a housing of the extractor hood by adopting a sound-eliminating and shock-absorbing device; the sound-eliminating and shock-absorbing device adopts a step type convex structure rubber body with an upper platform surface and a lower platform surface, and the middle of the step type convex structure rubber body is longitudinally provided with a cylindrical groove from the upper platform surface downwards; the bottom of the cylindrical groove is positioned in the lower platform surface; a metal thread connecting member is embedded in the cylindrical groove; and the step type convex structure rubber body outside the metal thread connecting member is internally provided with a metal support framework. Compared with the prior art, the invention has the advantages that the rigid connection mode of the worm assembly with the housing of the extractor hood is changed into the damping elastic connection mode of the worm assembly with the housing of the extractor hood by adopting the special sound-eliminating and shock-absorbing device with a damping characteristic at the part of fixing the bolt, thus the condition of vibration of the housing of the extractor hood, generated by operation of a motor, is radically changed.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to a shock-absorbing and noise-reducing range hood. Background technique [0002] At present, when the range hood is working, since the motor drives the turbine to run, the body of the range hood will generate vibration and noise at a certain frequency. The reason is that the motor is a moving part. Due to the manufacturing error of the parts, it will definitely produce periodic vibrations during operation. Similarly, when the turbine runs under the drive of the motor, it will also produce periodic vibrations. The assembly composed of the motor and the turbine, and the connection between the assembly and the body of the range hood are all connected by screws, and some rubber or other materials are added to the joint part. When the screws are locked, the hardness is very high after compression. High rubber or other material gaskets can no longer play the role of shock absorption. ...

AI Technical Summary

Problems solved by technology

The assembly composed of the motor and the turbine, as well as the connection between the assembly and the body of the range hood are all connected by screws, and some rubber or other materials are added to the joint part. When the screws are locked, the hardness is very high after compression. High rubber or other sealing gaskets can no longer play the role of shock absorption

And in all such structures, the screws are directly connected to the two parts, which is a rigid connection without any shock-absorbing parts in the middle

In this way, the periodic vibration of the motor will be transmitted to the whole body of the range hood, which will vibrate together and cause noise.

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