Patent ID: 6283865
Filing Date: 2001-09-04
Classification: F16F

Abstract:
A damper disk assembly, comprising:a first rotary member;a second rotary member disposed relatively rotatably with respect to said first rotary member; anda dampening mechanism coupled between said first and second rotary members to transmits a torque therebetween and dampen torsional vibrations, said dampening mechanism includinga 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, anda first friction mechanism disposed so as to operate in parallel with respect to said third elastic member,said torsion characteristics of said second stage of said second elastic member being arranged 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 such that said second and third elastic members are elastically compressing together during said second stage.