The invention belongs to the technical field of automotive interiors, and discloses a commercial vehicle cab noise reduction and sound insulation structure which comprises a plurality of noise reduction and sound insulation assemblies, an aluminum foil layer is arranged at the top of a sound absorption cotton layer, and it is guaranteed that noise of a cab penetrates through the aluminum foil layer to the maximum extent; the interior of the sound absorption cotton layer is of a spiral structure, the sound absorption cotton layer absorbs vibration of noise, and the noise reduction effect is achieved. Meanwhile, the sound-absorbing cotton layer of the spiral structure can increase the overall spring effect with the aluminum foil layer, so that a low-frequency noise absorbing area can be formed between the aluminum foil layer and the sound-absorbing cotton layer, low-frequency and high-energy noise can be better handled, and the low-frequency and low-energy noise reduction effect is enhanced; the adhesive layer is attached to the inner surface of the metal plate of the cab and is closer to a sound source of noise, sound waves of the noise are transmitted into human ears through a body in white, and the noise reduction effect is better than that of traditional sound absorption cotton arranged on the interior trim protection plate.
本发明属于汽车内饰技术领域,公开了商用车驾驶室降噪隔音结构,该商用车驾驶室降噪隔音结构包括降噪隔音组件,降噪隔音组件的数量有多个,铝箔层设置于吸音棉层的顶部,保证驾驶室的噪音最大程度地穿过铝箔层,吸音棉层的内部呈螺旋状结构,吸音棉层吸收噪声的振动,达到降噪的效果。同时,螺旋状结构的吸音棉层能够增加与铝箔层的整体弹簧效应,以使铝箔层与吸音棉层之间能够形成低频噪音吸收区,可以更好地应对中低频高能量的噪声,以增强中低频降噪的效果,粘贴层设置于吸音棉层的底部,粘贴层贴敷于驾驶室的钣金内表面,更加接近噪音的声源,噪音的声波透过白车身传递到人耳中,降噪效果优于布置于内饰护板的传统吸音棉。
Commercial vehicle cab noise reduction and sound insulation structure
商用车驾驶室降噪隔音结构
2024-06-04
Patent
Electronic Resource
Chinese
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