Patent ID: 6264563
Filing Date: 2001-07-24
Classification: F16F

Abstract:
A damper mechanism comprising:a first rotary plate formed with a window;a second rotary plate coaxially aligned with said first rotary plate, said second rotary plate being disposed on a first axial side of said first rotary plate, said second rotary plate having a first support adjacent to said window with the damper mechanism in a torsion free state;a third rotary plate coaxially aligned with said first and second rotary plates, said third rotary plate being disposed on a second axial side of said first rotary plate, said third rotary plate having a second support adjacent to said window;a plate-like coupling portion extending in an axial direction between outer peripheral portions of said second and third rotary plates fixing said second and third rotary plates together, said coupling portion having a main surface facing in a radially outward direction relative to the damper mechanism;a first elastic member disposed inside said window and between said first and second supports for elastically and circumferentially coupling said first rotary plate to said second and third rotary plates, said first elastic member being compressed between said window and said first and second supports in response to relative rotary displacement between said first rotary plate and said second and third rotary plates;a hub disposed co-axially with respect to said first, second and third rotary plates in a radially inward portion of said first rotary plate;a second elastic member elastically and circumferentially coupling said first rotary plate to said hub, said second elastic member having a rigidity lower than a rigidity of said first elastic member;a friction mechanism disposed in the damper mechanism arranged to generate frictional resistance in response to compression of said first elastic member in a predetermined region of relative rotary displacement within the damper mechanism; anda friction generation suppression mechanism having a rotational gap preventing operation of said friction mechanism during input of a small angle vibration in a rang in which said first elastic member is compressed;said first rotary plate being provided at an outer periphery thereof with a stop portion arranged to contact said plate-like coupling portion in response to relative rotary displacement between said first rotary plate member and said second and third rotary plate members.