Power transmission device

A power transmission device comprising:

• a flywheel including a plurality of fixation holes, the flywheel configured to be fixed to a drive source-side member;
• and
• a damper device fixed to the flywheel, the damper device configured to transmit a torque inputted thereto from the flywheel to an output-side member, the damper device configured to attenuate torque fluctuations, wherein
• the damper device includes an input rotary member, an output rotary member, and a pair of first elastic members, the output rotary member rotatable relative to the input rotary member, the pair of first elastic members configured to elastically couple the input rotary member and the output rotary member in a rotational direction,
• the input rotary member and the output rotary member each include a plurality of assembling holes and a pair of diametrically opposed first accommodation portions, the plurality of assembling holes disposed in corresponding positions to the plurality of fixation holes of the flywheel, the pair of first accommodation portions accommodating the pair of first elastic members,
• the plurality of assembling holes are arranged in a circumferential direction such that two pairs of the plurality of assembling holes, each pair including two adjacent assembling holes among the plurality of assembling holes, are each disposed at a larger interval than remaining assembling holes of the plurality of assembling holes to produce a pair of diametrically opposed accommodation spaces, the pair of diametrically opposed accommodation spaces being rotationally aligned with the pair of first accommodation portions, and
• the pair of first accommodation portions is disposed radially outside the pair of accommodation spaces.