| 摘要 |
PURPOSE:To suppress a vibration in a car body and its confined sound or the like to a small level, by forming a pitch between neighboring track grooves to a different value and dispersing vibrative energy. CONSTITUTION:A universal coupling, forming all of the pitches alpha1-alpha5 to a different value between track grooves 11, 21 neighboring to each other in an outer member 10 and an inner member 20, generates no fixed vibrative frequency in each pitch because a period of change being accompanied with induced thrust force is different in each pitch. In this way, the vibrative frequency, concentrated to a value (n) times the rotary speed, can be widely dispersed. Accordingly, the coupling, dispersing vibrative energy, enables a vibration of a car body and its confined sound or the like to be suppressed to a small level. |
