Passenger car floor with sound insulation and decrease of noise functions

Abstract

The invention discloses a bus floor with acoustic insulation and damping functions, which is arranged at the back of a carriage, and comprises the following layers from the top down: a floor leather layer, a damping slab rubber layer, a bakelite board interlayer, a multilayer compound acoustic damping cotton layer, a steel plate layer and a self-crusting rubber-plastic sponge layer. A cavity is also arranged between the bakelite board interlayer and the multilayer compound acoustic damping cotton layer. The multilayer compound acoustic damping cotton layer comprises three layers from the top down, namely a porous sponge acoustic absorption layer, a high-density rubber-plastic sponge acoustic insulation layer and a self-adhesion damping acoustic insulation layer. The bus floor adopts sealing, acoustic absorption, acoustic insulation and vibration reduction to achieve the acoustic insulation and damping functions. After the floor is adopted, noise in a bus can be reduced, and environment in the carriage becomes more comfortable.

Description

technical field [0001] The invention relates to a passenger car floor with sound insulation and noise reduction functions. Background technique [0002] At present, with the gradual improvement of the noise limit standard for passenger cars, the issue of noise environmental protection is becoming more and more important. The noise inside the car is not only a mandatory inspection requirement for passenger cars leaving the factory, but also one of the mandatory requirements for export vehicles to meet foreign certification. With the increase in the number of Chinese bus exports, international certifications are gradually increasing. International certifications have strict requirements on the limit standards of bus noise. At present, it is extremely difficult to meet the international certification standards for domestic bus noise. [0003] With the development of the bus industry, people have more and more strict requirements on the comfort of passenger cars. Controlling the...

AI Technical Summary

Problems solved by technology

However, the current domestic noise limit standard for passenger cars is relatively low, which cannot truly reflect the comfort requirements of passengers.

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