| 摘要 |
To provide a torsional vibration damping device which is capable of preventing abrasion, searing, and the like of a contact region between one end portion of an arm member and a cam surface by lubricating the contact region. In the torsional vibration damping device 1, disc plates 7, 8 are secured to a radially outer peripheral part of a boss 5 so as to surround a coil spring 4, an arm member 16 and a cam portion 6, whereby a space 24 for accommodating therein a grease 23 is defined between the radially outer peripheral portion of the boss 5 and axially inner peripheral portion of the disc plates 7 and 8, and sealing members 25, 26 are interposed between the radially outer peripheral portion of the boss 5 and radially inner peripheral portion of the disc plates 7, 8. |
