Vibration and noise reduction type gearbox based on porous materials

Abstract

The invention discloses a vibration and noise reduction type gearbox based on porous materials and aims to effectively reduce vibration and noise of the gearbox. The vibration and noise reduction type gearbox comprises a gearbox shell, an input shaft hole and an output shaft hole, the input shaft hole and the output shaft hole are formed in the gearbox shell, and vibration reduction bushings are arranged in the input shaft hole and the output shaft hole respectively. Each vibration reduction bushing comprises a supportive inner vibration reduction layer, a plastic vibration reduction layer and an outer vibration reduction layer sequentially from inside to outside, wherein a closed annular cavity is formed between the plastic vibration reduction layer and the outer vibration reduction layer and filled with liquid, and a rubber spacer bush arranged in the annular cavity sleeves the plastic vibration reduction layer and partitions the annular cavity into an inner annular cavity and an outer annular cavity. The supportive inner vibration reduction layers and the outer vibration reduction layers are made of powder metallurgy materials, and the plastic vibration reduction layers are made of foamed plastics.

Description

technical field [0001] The invention relates to a gear box, in particular to a vibration-damping and noise-reducing gear box based on porous materials. Background technique [0002] The vibration and noise of the gearbox are mainly caused by the friction, vibration and collision of the transmission gear. How to effectively reduce the vibration and noise of the gearbox and make it more in line with environmental protection requirements is a key research topic at home and abroad. Although the vibration and noise of the gearbox are mainly caused by the friction, vibration and collision of the transmission gear, due to the large volume of the gearbox casing and the easy amplified vibration of its wall, the gearbox casing is very important for the vibration generated in the entire gearbox. Noise is also affected to some extent. In view of this, some inventors have improved the gearbox housing, but the current improvement to the gearbox housing is often based on "strengthening th...

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Problems solved by technology

[0004] The first purpose of the present invention is to provide a vibration and noise-reducing gearbox based on porous materials to overcome the problem in the prior art that the effect of effectively reducing noise is not good by strengthening the strength and rigidity of the gearbox casing. , which can effectively reduce the noise of the gearbox

[0005] Another purpose of the present invention on the basis of the first purpose is to overcome the problem that the vibration damping element of the gearbox in the prior art is not effective in damping and isolating vibrations in the middle and high frequency regions, and to provide a vibration damping device based on porous materials. Noise type gearbox, which can not only reduce the vibration of the gearbox in the low frequency region, but also effectively improve the vibration reduction and isolation effect of the gearbox in the middle and high frequency region

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