Torsional vibration reducing device

A torsional vibration reducing device comprising:

• a mass damper and a spring damper placed side by side in a predetermined axis direction, the mass damper being configured to reduce ripples of torque by inertia moment of an inertial body, the spring damper including an elastic body configured to be compressed by relative rotation between an input-side rotational member and an output-side rotational member, the spring damper being configured to reduce ripples of torque to be transmitted between the input-side rotational member and the output-side rotational member by the elastic body being compressed;
• a torque limiter configured to restrict torque to be transmitted between the mass damper and the spring damper;
• and
• a bolt configured to fix the inertial body and the input-side rotational member to each other in the predetermined axis direction by being inserted from the input-side rotational member side, wherein
• the input-side rotational member includes a receiving portion recessed toward the mass damper side such that at least part of a head of the bolt in a height direction of the bolt is received by the receiving portion,
• the torque limiter includes first and second plates integrated with each other by being laminated on the mass damper in the predetermined axis direction, a pressure plate placed to face the first plate, a disc spring configured to press the pressure plate toward a first plate side, and a driving-side rotational member placed between the pressure plate and the first plate,
• the input-side rotational member includes an outer plate, being the first plate, laminated across an inner plate, being the second plate, from the mass damper, an outer peripheral portion of the inner plate being sandwiched between an outer peripheral side of the inertial body and an outer peripheral portion of the outer plate, and an outer-peripheral-side side surface of the inner plate contacting with an outer-peripheral-side end surface of the inertial body,
• the receiving portion is formed in the outer peripheral portion of the outer plate, and
• the disc spring is sandwiched between the pressure plate and an inner peripheral portion of the inner plate.