Damper device

A damper device attachable to a power source-side member, the damper device comprising:

• a torque limiter unit including a cover plate, the cover plate having an annular shape, the cover plate configured to be fixed to a surface of the power source-side member on a first side of the power source-side member in an axial direction;
• a damper unit disposed such that an outer peripheral end thereof is located on a second side of an inner peripheral end of the cover plate in the axial direction, the damper unit transmitting a mechanical power together with a power source therebetween through the torque limiter unit;
• a positioning structure radially setting the damper unit in place with respect to the torque limiter unit;
• wherein
• the cover plate includes a friction portion and an attachment portion, the friction portion having a disc shape, the attachment portion disposed radially outside the friction portion, the attachment portion attached to the power source-side member,
• the torque limiter unit further includes a friction disc, the friction disc disposed on the second side of the friction portion of the cover plate in the axial direction, the friction disc pressed against the friction portion,
• the damper unit includes an input rotor, the input rotor having a disc shape, the input rotor disposed such that an outer peripheral end thereof is located on the second side of the friction portion of the cover plate in the axial direction, the input rotor receiving the friction disc at the outer peripheral end thereof such that the friction disc is fixed at an inner peripheral part thereof to a lateral surface of the outer peripheral end of the input rotor on the first side of the input rotor in the axial direction,
• the positioning structure radially sets the damper unit in place with respect to the torque limiter unit by making an outer peripheral end surface of the friction disc contactable with the cover plate of the torque limiter unit,
• the friction portion of the cover plate is offset from the attachment portion to the first side in the axial direction,
• the cover plate further includes a coupling portion, the coupling portion extending in the axial direction, the coupling portion coupling the friction portion and the attachment portion therethrough, and
• the outer peripheral end surface of the friction disc is contactable with an inner surface of the coupling portion.