| 摘要 |
PURPOSE:To prevent generation of constant elastic vibration mode by positively making rigidity in the circumferential direction differentiated. CONSTITUTION:A disc 10, a rim 12 provided on the disc in an integrated manner, and a dynamic damper 14 are provided. The rim 12 is composed of a semi- cylindrical rim part 16, and of a semicylindrical rim part 17 of the thickness smaller than that of the rim part 16, and the rigidities are differentiated with one another in the circumferential direction. The dynamic damper 14 is mounted on the outer peripheral surface of the rim part 17, and the unbalance in the weight is adjusted thereby. |
