| 摘要 |
PURPOSE:To secure large values of length and cross-sectional area of a space for charging fluid and enlarge inertial mass to enhance damping capacity by fitting a vibration ring to a hub in such a manner as to enclose a projected part formed on the hub of a rotation shaft, and charging a circumferencial space of the projected part with viscous fluid. CONSTITUTION:A hub 2 is fixed to a rotation shaft 1 and a projected part 3 is formed in the radial direction outer side than an approximate center of axial length of the hub 2. Vibration rings 4, 4' are fitted to the hub 2 in such a manner as to enclose the projected part 3 from both sides in the axial direction of the projected part 3. The vibration ring 4 and a sleeve 6 are vulcanizedly bonded to a rubber member 5, while the vibration ring 4' and a sleeve 6' also to a rubber member 5'. Projected strips 4A, 4'A for enclosing the projected part 3 are formed on the vibration rings 4, 4'. A space 7 is formed in the circumference of the projected part 3 and charged with vicous fluid 8. In this constitution, positioning of the vibration rings 4, 4' in the outermost circumference enlarges inertial mass thereof, and moreover, charging of the circumference of the projected part 3 in the hub 2 with viscous fluid 8 relatively enlarges length and cross-sectional area of the space 7, consequently enhancing damping capacity. |
