Damper mechanism
AssigneeExedy Corporation
InventorHirotaka Fukushima
Life of this patent
Estimating the term…
Abstract
A damper mechanism 6 is provided to transmit torque while absorbing and damping torsional vibrations. A small coil spring 45 achieves characteristics of a low rigidity in a small torsion angle region of the torsion characteristics when compressed by rotary members. A coil spring 33 achieves characteristics of a high rigidity in a large torsion angle region of the torsion characteristics when compressed by the rotary members rotating relatively to each other. A frictional resistance generating mechanism 7 generates a frictional resistance while each spring is being compressed. Owing to a rotating-direction space 79, the frictional resistance generating mechanism 7 does not operate in the second stage of the torsion characteristics and also does not in the first stage while a torsion angle is in a predetermined range.
Claims20
A frictional resistance generating mechanism arranged between two relatively rotatable members of a rotary mechanism for generating a frictional resistance in response to relative rotation occurring between the two members by torsional vibrations to damp the torsional vibrations, said frictional resistance generating mechanism comprising:
- a first frictional resistance generating portion;
- a second frictional resistance generating portion generating a frictional resistance larger than that generated by said first frictional resistance generating portion;
- a first frictional resistance suppressing portion having a first rotating-direction space to prevent operation of both of said first and second frictional resistance generating portions;
- and
- a second frictional resistance suppressing portion having a second rotating-direction space to prevent operation of only said second frictional resistance generating portion on opposite sides of a torsion angle range of said first rotating-direction space.
A frictional resistance generating device arranged between two relatively rotatable flywheels of a rotary mechanism for generating a frictional resistance in response to relative rotation occurring between the two flywheels by torsional vibrations to damp the torsional vibrations, said frictional resistance generating device comprising:
- a large frictional resistance generating mechanism being configured to generate a large frictional resistance when the flywheels rotate relative to each other;
- a large frictional resistance generation suppressing mechanism having a rotating-direction space to prevent operation of said large frictional resistance generating mechanism;
- and
- a small frictional resistance generating mechanism being configured to generate a frictional resistance being smaller than said large frictional resistance generated by said large frictional resistance generating mechanism on opposite sides of said rotating-direction space.
A frictional resistance generating mechanism arranged between two relatively rotatable flywheels of a rotary mechanism for generating a frictional resistance in response to relative rotation occurring between the two flywheels by torsional vibrations to damp the torsional vibrations, said frictional resistance generating mechanism comprising:
- a first friction portion having,
- a first hysteresis torque generating portion being configured to generate a first hysteresis torque when the flywheels rotate relative to each other, and
- a first rotating-direction space arranged to operate in series with respect to said first hysteresis torque generating portion in a rotating direction;
- and
- a second friction portion arranged in said rotating direction and between said first hysteresis torque generating portion and said first rotating-direction space having
- a second hysteresis torque generating portion generating a second hysteresis torque smaller than said first hysteresis torque, and
- a second rotating-direction space being arranged to operate in series with respect to said second hysteresis torque generating portion in said rotating direction.
A frictional resistance generating mechanism arranged between two relatively rotatable members of a rotary mechanism for generating a frictional resistance in response to relative rotation occurring between the two members by torsional vibrations to damp the torsional vibrations, said frictional resistance generating mechanism comprising:
- a first rotary member;
- a second rotary member being rotatable relatively to said first rotary member;
- a first intermediate member engaging with said first rotary member via a first rotating-direction space;
- and
- a second intermediate member cooperating with said first intermediate member to form an engagement portion engaging with said first intermediate member via a second rotating-direction space, cooperating with said first intermediate member to form a first frictional resistance generating portion slidably and frictionally engaging in a rotating direction with said first intermediate member, and cooperating with said second rotary member to form a second frictional resistance generating portion slidably and frictionally engaging in said rotating direction with said second rotary member to generate a frictional resistance larger than a frictional resistance generated by said first frictional resistance generating portion.
A frictional resistance generating mechanism arranged between two relatively rotatable members of a rotary mechanism for generating a frictional resistance in response to relative rotation occurring between the two members by torsional vibrations to damp the torsional vibrations, said frictional resistance generating mechanism comprising:
- a first rotary member;
- a second rotary member being rotatable relatively to said first rotary member;
- a first intermediate member engaging with said first rotary member via a space in the first rotating-direction, and cooperating with said second rotary member to form a first friction generating portion therebetween;
- and
- a second intermediate member being arranged between said first and second rotary members to operate with respect to said first intermediate member in a rotating direction such that an end of said second intermediate member and an end of said first intermediate member exert forces on each other, engaging with said first intermediate member via a second space in the rotating-direction, and cooperating with said second rotary member to form a second friction generating portion therebetween.
Dependencies are inferred from the claim text.