| 摘要 |
PROBLEM TO BE SOLVED: To provide a part having a small-sized structure and able to damper the vibration of a cam shaft without any adjusting device. SOLUTION: A part for transmitting the rotational motion and damping torsional vibration is provided with a damper casing 3 for housing an operating chamber. A closing cover 4 is fixed to the damper casing, and the damper casing is integrally connected inward in the radial direction in the fixed range for the connection to a member to be damped. The damping mass is arranged in a viscous damping medium in the damper casing. A profile for transmitting the rotational motion is formed on the outer periphery in the radial direction of the damper casing. The part is formed as a cam shaft wheel 1 manufactured by non-cut deformation work, and the cam shaft wheel is provided with a molded part formed as a cam shaft wheel tooth-shaped part 5 on the outer periphery of the damper casing 3. |
