Patent ID: 8291698
Filing Date: 2012-10-23
Classification: F01N

Abstract:
1. A sound insulation cover comprising: a cover member that is externally mounted on a noise source and that insulates transmission of noises to an outside; and a fixing means that is combined with an opening formed in the cover member in correspondence to a fixing portion of the noise source and that fixes the cover member to the fixing portion of the noise source, wherein the fixing means has: a ring-shaped cover holding plate fixed to the cover member along an edge portion of the opening of the cover member; and a disk-shaped fixing plate fixed to the fixing portion of the noise source, an inner peripheral portion of the cover holding plate and an outer peripheral portion of the fixing plate being formed into a ring-shaped depressed-projected fit portion in which a projected portion is fitted in a depressed portion so as to freely slide in a direction of inside of a plane, the cover holding plate and the fixing plate being connected to each other via this depressed-projected fit portion, wherein one of the sliding surfaces of the cover holding plate and the fixing plate has a bead that is formed in an arc cross section and that is put into sliding contact with the other sliding surface.