| 摘要 |
PURPOSE:To improve the vibration absorbing function of a damper mechanism under wide temperature environment and to improve durability by a method wherein a rubber material consists mainly of an ethylene-alpha-olefin copolymer rubber substance (EPM) in which the number of carbons of alpha-olefin is within a specified range and an ethylene content is specified wt.%. CONSTITUTION:A rubber resilient substance 24 by which the damper mechanism of a fly wheel with a damper is formed is formed by a rubber material consisting mainly of EPM in which the number of carbons of alpha-olefin is 3-8 and an ethylene content is 30-60wt.%. Therefore, an excellent vibration absorbing function is stable under wide temperature environment and excellent durability is provided. Propylene, 1-butene, 1-pentene, 1-hexane, tetraethyle-1-pentene, 1-octane or a mixture of them can be listed as alpha-plefin by which the one component of EPM is formed. When a content, based on a whole of EPM, of ethylene by which the other component of EPM is formed exceeds 60wt.%, cold resistance and processability are reduced, and even when it is 30wt.% or less, lowering of cold resistance is recognized. |
