| 摘要 |
PROBLEM TO BE SOLVED: To improve durability by enhancing the heat radiation property of an elastic body 42 in an auxiliary vibration system 4 arranged in a space surrounded by a hub 1 and an inward flange 24 in a torsional damper having a plurality of auxiliary vibration systems 3, 4. SOLUTION: This torsional damper is provided with the first auxiliary vibration system 3 comprising a first annular mass body 31 arranged on the outer peripheral side of a sleeve body part 21 of a sleeve 2, and a first elastic body 32 for connecting the first annular mass body 31 to the sleeve body part 21; and a second auxiliary vibration system 4 comprising a second annular mass body 41 arranged between the hub 1 and the inward flange 24 of the sleeve 2, and a second elastic body 42 for connecting the second annular mass body 41 to the inward flange 24. A pumping hole 25 radially piercing on the outer peripheral side of the second auxiliary vibration system 4 is opened in the sleeve 2, and an air hole 13 is opened in a disc part 11 of the hub 1. COPYRIGHT: (C)2004,JPO
|
