Patent ID: 7192357

Claim:
A dynamic damper assembly comprising: a torque transmissible tube member; a dynamic damper housed within the torque transmissible tube member, the dynamic damper including: a mass member housed within an inside of the tube member in a center axis direction of the tube member being coupled to the tube member via a pair of elastic members, the mass member including a large mass section formed between the pair of elastic members, a length of the mass member in the center axis direction of the tube member being longer than a diameter of the large mass section, from among first-order and second-order bending resonance vibration modes of the tube member, a node of the second-order being resonance vibration mode being placed at a position between the pair of elastic members, and the elastic members to set a ratio of two different specific values of resonances that the dynamic damper has to a range between 2.7 and 6.3.