| 摘要 |
A noise reduction structure for a vehicle driveshaft assembly insures that each of the interior chambers of the driveshaft tube is properly vented during use. T he noise reduction structure is a solid member having a predetermined length and a cross sectional shape which corresponds generally to the cross sectional shape of the driveshaft tube. Preferably, the noise reduction structure has an outer diameter which is approximately equal to, or slightly larger than, the inner diameter of the dr iveshaft tube. As such, the noise reduction structure engages the inner surface of the dr iveshaft tube in a light press fit relationship. Each noise reduction structure has a pas sageway, groove, or other opening formed therein which extends axially throughout its len gth. In a preferred embodiment, an axially-extending groove is formed on the outer circumferential surface of the noise reduction structure. The groove provides fo r free air flow from one end of the noise reduction structure to the other, thereby ins uring that each of the interior chambers of the driveshaft tube is properly vented dur ing use. |
