| 摘要 |
PURPOSE: To improve a vibration isolating effect against a high frequency vibration by forming a plurality of opening windows partitioned by a connecting part, and specifying a total area of the opening window, in an intermediate peripheral part of the total surface area of an umbrella member arranged so as to partition a fluid chamber in both sides in a main vibration input direction. CONSTITUTION: In an engine mount 10 for an automobile, a main unit rubber 16 is interposed between a mounting metal fitting 12 and a cylindrical metal fitting 24, to arrange a partitioning member 44 and a diaphragm 46 in an opening part of this cylindrical metal fitting 24. An umbrella metal fitting 100, having a center disk part 106 and a peripheral circular annular part 108, is arranged to be received to a pressure receiving chamber 52 formed between the main unit rubber 16 and the partitioning member 44, and an opening window 112 is respectively formed in a connecting part 110 adjacent in each peripheral direction. An intermediate peripheral part 114 of this umbrella metal fitting 100 is formed in size of occupying 1/2 or more its total surface area, and a total opening area of the four opening windows 112 is set to a size of occupying 3/4 or more the surface area of the intermediate peripheral part 114. |
