Sound-proof device and vehicle provided with sound-proof device

Abstract

The invention provides a sound-proof device and a vehicle. The sound-proof device comprises a blocking piece and a protection cover, wherein the blocking piece is connected with a through hole in a metal plate of a vehicle body; the protection cover at least covers the outside of parts of the blocking piece. The protection cover at least covers the outside of parts of the blocking piece, so that the phenomenon that the whole blocking piece is exposed in the air is avoided, the blocking piece is protected by the protection cover to a certain degree, and the service life of the blocking piece is prolonged. In addition, when noise spreads from a noise source to the protection cover, the protection cover can have certain effects of insulating sound and reducing noise, and when the noise spreads to the blocking piece, the blocking piece can have an effect of secondary noise reduction, so that the noise is further reduced, the possibility that the noise interferes with a driver is decreased, and the safe running of the vehicle is guaranteed accordingly.

Description

technical field [0001] The invention relates to the technical field of vehicle engineering, in particular to a sound insulation device and a vehicle provided with the sound insulation device. Background technique [0002] For ordinary passenger cars, the noise in the cockpit mainly comes from the following three sources: tire suspension noise, road excitation noise and powertrain noise. Due to the needs of technology, there are often process through holes on the vehicle body sheet metal near the noise source. The noise from the above three sources is likely to be transmitted into the cab through the process through holes, thereby affecting the driver's hearing. It causes certain interference and affects the safe driving of the vehicle, so it is more important to improve the noise reduction performance of the vehicle. In order to improve the noise reduction performance of the whole vehicle, the existing technology mainly reduces noise by installing rubber plugging parts in t...

AI Technical Summary

Problems solved by technology

Due to the needs of technology, there are often process through holes on the vehicle body sheet metal near the noise source. The noise from the above three sources is likely to be transmitted into the cab through the process through holes, thereby affecting the driver's hearing. It causes certain interference and affects the safe driving of the vehicle, so it is more important to improve the noise reduction performance of the vehicle

In order to improve the noise reduction performance of the whole vehicle, the existing technology mainly reduces noise by installing rubber plugging parts in the process through holes. The noise is transmitted from the noise source to the outside of the body sheet metal through the first medium—air, and then Through the second medium—rubber sealing parts, it is transmitted from the outer side of the body sheet metal to the inner side of the body sheet metal. Since the noise propagates in two different media successively, the energy carried by the noise will be lost to a certain extent, so the rubber sealing The parts can play a certain role in sound insulation and noise reduction, but there are certain defects in this noise reduction method: because the rubber sealing parts installed in the process through holes are exposed to the external environment for a long time, it is particularly easy to age, and its The sound insulation performance will gradually decrease with the deepening of its aging degree, and a good sound insulation and noise reduction effect cannot be guaranteed

Images