| 摘要 |
<p>Disclosed is a torsional vibration damping device configured to have hysteresis torques in the positive and negative sides varied by a simple construction, thereby improving the efficiency of production work and preventing an increase in production cost. Friction materials 27, 28 are respectively provided on surfaces of a hub member 11 and the disc plates 16, 17, the surfaces facing each other in the radial direction when the hub member 11 is twisted in the positive side with respect to the disc plates 16, 17. The friction materials 27, 28 are to be brought into friction contact with each other when the hub member 11 is twisted by a specific angle with respect to the disc plates 16, 17.</p> |
