Automobile body cavity sound insulation rubber block

Abstract

The invention discloses an automobile body cavity sound insulation rubber block. The automobile body cavity sound insulation rubber block includes a sound insulation substrate, installation clamping buckles arranged at the lower surface of the sound insulation substrate, a guide tube of which the outer wall is connected with the sound insulation substrate, a plugging cover, and a foam material which is embedded at the circumference of the sound insulation substrate, wherein the guide tube passes through the sound insulation substrate, the plugging cover is matched with the outlet of the guide tube so that the guide tube can be as opened and closed, and the sound insulation substrate, the installation clamping buckles, the guide tube and the plugging cover are formed through integrated injection molding; and the guide tube is provided with an inlet tube located at the upper surface of the sound insulation substrate and an outlet tube located at the lower surface of the sound insulation substrate, wherein the inlet tube is an elliptic cone tube which is large at the upper part and is small at the lower part. With the sound insulation rubber block adopted, the installation of a skylight drainage pipe is more convenient, and the guide tube will not be plugged by the foamed foaming material.

Description

technical field [0001] The invention relates to an automobile accessory, in particular to a sound-insulating rubber block for an automobile body cavity. Background technique [0002] The cavity noise of the car body has a great impact on the occupants in the car. Blocking and absorbing the cavity noise has become an indispensable link in the development process of the car body, which has a significant effect on improving the NVH performance of the car. The noise outside the vehicle propagates in the cavity in the form of sound waves. At the same time, the high-speed airflow in the cavity of the vehicle body will form a vortex in the cavity, causing the vibration of the sheet metal parts, thereby generating cavity sheet metal vibration noise. Arranging sound-proof rubber blocks has been widely used as a means of sound-proofing and reducing noise in the cavity. The sound-insulating rubber block is composed of a sound-insulating matrix (such as nylon material) and a foaming ma...

AI Technical Summary

Problems solved by technology

Although this kind of sound-insulating rubber block meets the requirements for passing the sunroof drain pipe, when it is used on a non-sunroof vehicle, it cannot completely seal the body sheet metal cavity, and there is a problem of sound leakage in the drain pipe conduit, and its sound insulation and noise reduction function is limited. In addition, it is difficult to install the skylight drain pipe, so it is necessary to manually align the skylight drain pipe with the inlet of the drain pipe conduit before installing

[0005] CN102582534A discloses a preformed sound-insulating rubber block and its installation method. The sound-insulating rubber block involved adds a blocking cover to the outlet end of the tapered through hole of the water guide pipe (equivalent to the guide pipe in this application), which solves the problem of Non-sunroof models use the sound-insulating rubber block with the tapered hole of the water pipe to cause sound leakage, but there are still the following problems: (1) The entrance of the tapered hole of the water pipe is flush with the upper surface of the bracket body, and the cone of the water pipe The through hole is arranged on the lower side of the bracket body, which does not play a guiding role. It is difficult to install the water guide pipe (equivalent to the skylight drain pipe in this application), and the thermal expansion sealing material (equivalent to the foam material in this application) is thermally expanded. It is also easy to block the tapered hole of the water pipe, resulting in the inability to install the water pipe; (2) When the tapered hole of the water pipe is closed, the plugging cover will seal the outlet of the tapered hole of the water pipe tightly, which will easily lead to the coating of electrophoretic fluid It cannot flow, and effusion is formed in the tapered hole of the aqueduct; (3) There are clamp feet on the blocking cover, and the inner wall edge of the corresponding taper hole of the aqueduct is provided with a buckle structure that is engaged with the clip feet. The buckle structure will occupy the inner space of the tapered via hole of the water conduit

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