Friction damper

A friction damper comprising:

• a cylindrical core member;
• and
• a cylindrical elastic body bonded to an inner or outer circumferential surface of the core member,
• wherein the core member is configured to be disposed within an annular space between an outer circumferential surface of an inner shaft and an inner circumferential surface of an outer shaft, which outer and inner circumferential surfaces are held in spline-fitting with each other, the core member is configured to be fixed to one of the inner and outer shafts, while the elastic body is configured to be disposed in pressing contact with the other of the inner and outer shafts, with compressive deformation of the elastic body,
• wherein the elastic body has an axial length larger than that of the core member, and includes an extending portion extending in its axial direction away from the core member,
• wherein the extending portion of the elastic body has a thick-walled section which extends in a radial direction of the elastic body away from the core member and has a larger wall thickness than a section of the elastic body which overlaps the core member in an axial direction of the core member, the thick-walled section being held in pressing contact with said other of the inner and outer shafts, and
• wherein the thick-walled section of the elastic body is formed in an axial end section of the extending portion remote from the core member, and a portion of the elastic body other than the thick-walled section has a constant thickness.