DUAL MASS FLYWHEEL

To provide a dual mass flywheel in which appropriate friction can be obtained between a pair of rotors in accordance with an increase in a rotation speed difference between the rotors.SOLUTION: A dual mass flywheel 1 is configured to comprise: a first rotor 10 rotating about a predetermined rotation center axis; a second rotor 20 attached to the first rotor to be relatively rotatable; a damper 30 that is provided to be coupled with the first and second rotors and generates reaction force according to the relative rotation; a rolling body 41 that is supported rollably around the axis provided parallel to the rotation center axis with respect to the second rotor and is configured to have flexibility so as to be expandable in diameter in accordance with an increase in rolling speed; a guide surface that is formed along a circumferential direction of the first rotor and abuts on an outer peripheral surface portion of the rolling body; and a friction surface 44 that is provided on the second rotor and comes into contact with the outer peripheral surface to generate friction when the diameter of the rolling body is expanded.SELECTED DRAWING: Figure 3 【課題】一対の回転体の回転速度差の増加に応じてこれらの間で適切な摩擦が得られるデュアルマスフライホイールを提供する。【解決手段】デュアルマスフライホイール１を、所定の回転中心軸回りに回転する第１回転体１０と、第１回転体に相対回転可能に取り付けられた第２回転体２０と、第１、第２回転体とを連結して設けられ相対回転に応じた反力を発生するダンパ３０と、第２回転体に対して回転中心軸と並行に設けられた軸回りに転動可能に支持されるとともに転動速度の増加に応じて拡径可能なよう可撓性を有して構成された転動体４１と、第１回転体の周方向に沿って形成され転動体の外周面部と当接する案内面と、第２回転体に設けられ転動体の拡径時に外周面と接触して摩擦を発生する摩擦面４４とを備える構成とする。【選択図】図３