Damper disk assembly

A damper disk assembly comprising:

• a first rotary member;
• a second rotary member disposed relatively rotatably with respect to said first rotary member;
• and
• a dampening mechanism coupled between said first and second rotary members to transmit a torque therebetween and dampen torsional vibrations, said dampening mechanism including
• a first elastic member adapted to be elastically deformed in a first stage of torsion characteristics,
• a second elastic member adapted to be elastically deformed only in a second stage of torsion characteristics for providing a higher rigidity than that in said first stage,
• a third elastic member disposed so as to operate at least partially in series with respect to said second elastic member in a third stage of torsion characteristics,
• a fourth elastic member disposed so as to operate in parallel with respect to said third elastic member, and configured to operate in a range not exceeding a predetermined torsion angle,
• a first friction mechanism disposed so as to operate in parallel with respect to said third elastic member, with said torsion characteristics of said second stage of said second elastic member being adapted to generate a torque that exceeds a sum of an initial torque of said third elastic member and a hysteresis torque of said first friction mechanism during relative rotation of said first and second rotary members,
• a second friction mechanism disposed so as to operate in parallel with said second elastic member, and configured to generate a smaller friction than said first friction mechanism,
• a third friction mechanism being formed between said second rotary member and said intermediate member to generate a third friction when said intermediate member rotates relative to said second rotary member during elastic deformation of said second elastic member,
• an intermediate member disposed so as to transmit a torque between said second and third elastic members, said first and second elastic members being disposed so as to transmit the torque between said first rotary member and said intermediate member, said third elastic member being disposed so as to transmit the torque between said intermediate member and said second rotary member, said first rotary member and said intermediate member being arranged to form a stop therebetween to allow a predetermined amount of rotational movement in a circumferential direction, and
• a first urging member arranged to urge axially a first axially facing friction surface of said second rotary member against a first axially facing friction surface of said intermediate member to form said first friction mechanism, and to urge axially a second axially facing friction surface of said second rotary member against a second axially facing friction surface of said intermediate member to form said second friction mechanism,
• said first urging member being arranged to urge axially said second rotary member and said intermediate member together to generate said third friction when said intermediate member rotates relative to said second rotary member during elastic deformation of said second elastic member.

A damper disk assembly comprising:

• a first rotary member including an output hub with a set of first teeth;
• a second rotary member disposed relatively rotatably with respect to said first rotary member, said second rotary member including a clutch plate and a retaining plate coupled together by at least one pin that engages a portion of said fixing plate to limit rotational movement between said first and second rotary members;
• and
• a dampening mechanism coupled between said first and second rotary members to transmit a torque therebetween and dampen torsional vibrations, said dampening mechanism including
• a first elastic member adapted to be elastically deformed in a first stage of torsion characteristics,
• a second elastic member adapted to be elastically deformed only in a second stage of torsion characteristics for providing a higher rigidity than that in said first stage,
• a third elastic member disposed so as to operate at least partially in series with respect to said second elastic member in a third stage of torsion characteristics,
• a first friction mechanism disposed so as to operate in parallel with respect to said third elastic member, with said torsion characteristics of said second stage of said second elastic member being adapted to generate a torque that exceeds a sum of an initial torque of said third elastic member and a hysteresis torque of said first friction mechanism during relative rotation of said first and second rotary members,
• a second friction mechanism disposed so as to operate in parallel with said second elastic member, and configured to generate a smaller friction than said first friction mechanism,
• a third friction mechanism formed between said second rotary member and said intermediate member to generate a third friction when said intermediate member rotates relative to said second rotary member during elastic deformation of said second elastic member,
• a fourth friction mechanism formed between said first rotary member and said intermediate member to generate a fourth friction when said first rotary member rotates relative to said intermediate member during elastic deformation of said first elastic member, and
• an intermediate member disposed so as to transmit a torque between said second and third elastic members, said intermediate member includes a fixing plate and a sub-plate, said fixing plate has a set of second teeth that operatively engages said first teeth after a predetermined amount of relative rotation between said output hub and said fixing plate, and said sub-plate has a set of third teeth that operatively engages said first teeth after a predetermined amount of relative rotation between said output hub and said sub-plate, said first and second elastic members are disposed so as to transmit the torque between said first rotary member and said intermediate member, said third elastic member is disposed so as to transmit the torque between said intermediate member and said second rotary member, and said first rotary member and said intermediate member are arranged to form a stop therebetween to allow a predetermined amount of rotational movement in a circumferential direction.

A damper disk assembly, comprising:

• a first rotary member;
• a second rotary member disposed relatively rotatably with respect to said first rotary member;
• and
• a dampening mechanism disposed between said first and second rotary members for transmitting a torque therebetween and damping torsional vibrations, said dampening mechanism including
• a first intermediate member disposed close to said first rotary member between said first and second rotary members,
• a first elastic member elastically coupling said first intermediate member and said first rotary member together in a rotating direction and adapted to be compressed in a first stage of torsion characteristics,
• a second intermediate member disposed close to said second rotary member between said first and second rotary members,
• a second elastic member elastically coupling said first and second intermediate members together in the rotating direction for providing a higher rigidity than said first elastic member and adapted to be compressed only in a second stage of the torsion characteristics,
• a third elastic member elastically coupling said second intermediate member and said second rotary member together in the rotating direction, and
• a first friction mechanism generating a friction when said second intermediate member and said second rotary member rotate relatively to each other, with a torque generated by said second elastic member being adapted to exceed a sum of an initial torque of said third elastic member and a hysteresis torque of said first friction mechanism.