A damper device that includes an input element to which torque from an engine is transferred; an output element; a first intermediate element; a second intermediate element; a first elastic body that transfers torque between the input element and the first intermediate element; a second elastic body that transfers torque between the first intermediate element and the output element; a third elastic body that transfers torque between the input element and the second intermediate element; a fourth elastic body that transfers torque between the second intermediate element and the output element; and a fifth elastic body that transfers torque between the first intermediate element and the second intermediate element.

A damper device includes a first rotary member, a second rotary member, a plurality of coil springs, an intermediate member and a slide spring. The first rotary member is a member into which a power of an engine is inputted. The second rotary member is disposed to be rotatable with respect to the first rotary member. The plurality of coil springs are configured to be compressed between the first rotary member and the second rotary member. The intermediate member is configured to engage the plurality of coil springs and couple the plurality of coil springs together. The slide spring is disposed axially between the first rotary member and the intermediate member. The slide spring is configured to slide against the first rotary member. The slide spring is configured not to slide with respect to the intermediate member.

A damper device is attached to a rotating shaft to suppress amplitude at resonance of the rotating shaft. The damper device includes: a damper housing formed annularly and concentrically with the rotating shaft; a plurality of mass bodies annularly arranged around the rotation shaft inside of the damper housing and configured to be movable in the diameter direction by centrifugal force; an annular elastic body, formed of a circular spring-shaped elastic body abutting on the outside of the plurality of the mass bodies, so as to bias the mass body inward; and a biasing member, being a leaf spring-shaped elastic body abutting on the outside of the annular elastic body, so as to bias the annular elastic body inward.

A lock-up device for a torque converter for transmitting a torque and for absorbing and attenuating a torsional vibration includes an input rotary member, an output rotary member disposed on both axial sides of the input rotary member and rotatable relatively to the input rotary member, and a plurality of first coil springs disposed in radially inner positions. The first coil springs are compressed in series by rotation of the input rotary member relative to the output rotary member whereby the torque is inputted therein from the input rotary member. The lock-up device also includes at least one second coil spring compressed when the input rotary member and the output rotary member are rotated relatively to each other at a predetermined relative angle or greater. The lock-up device additionally includes a float member disposed radially inward of the first coil springs and coupling the plural first coil springs in series.

A hybrid module is configured for arrangement in a torque path upstream from a transmission and downstream from an internal combustion engine. The hybrid module includes an electric motor and a clutch. The electric motor includes a rotor and a rotor carrier supporting the rotor. The hybrid module also includes a damper assembly fixed to the rotor carrier. The clutch is configured for selectively coupling the damper assembly to a shaft drivingly coupled to the internal combustion engine. The damper assembly includes an output configured for connecting to an input shaft of the transmission.

A rotary inertia mass damper of a damper device is configured to include a planetary gear that includes a driven member with outer teeth, first and second input plate member as a carrier which rotatably supports a plurality of pinion gears, and a ring gear that meshes with the plurality of pinion gears and works as the mass body. The outer teeth of the driven member are arranged to be disposed outside first and second springs in a radial direction of the damper device. The driven member, the plurality of pinion gears and the ring gear are arranged to at least partially overlap with the first and second springs as viewed in the radial direction. A motion of the ring gear in the axial direction is restricted by the plurality of pinion gears.

A lock-up device for a torque converter includes an output rotary member rotatable with respect to an input rotary member. A plurality of large coil springs are disposed in radially outer positions so as to be aligned in a circumferential direction, the large coil springs separately compressed in a rotational direction by relative rotation between the input rotary member and the output rotary member. A plurality of small coil springs are set to have a free length shorter than a free length of the large coil springs, the small coil springs separately disposed in inner peripheral parts of the large coil springs so as to be movable therein. The respective coil springs are compressed in a sequential order of the plural large coil springs and then at least any one of the plural small coil springs by the relative rotation between the input rotary member and the output rotary member.

A lock-up device includes a drive plate, a driven plate, first torsion springs, second torsion springs, a spring holder and a rotation restricting unit. The rotation restricting unit is configured to restrict and bring the first torsion spring in each group and the second torsion spring in each group to a deactivated state by at least either of engagement of the spring holder with the driven plate or engagement of the drive plate with the spring holder.

A hydrokinetic torque coupling device comprises a casing rotatable about a rotation axis, a torque converter including an impeller wheel and a turbine wheel disposed in the casing coaxially with the rotation axis, a turbine hub disposed in the casing coaxially with the rotation axis and fixed to the turbine wheel, and a torsional vibration damper. The torsional vibration damper comprises a driven member fixed to the turbine hub, a back plate rotatably mounted to the turbine hub, a plurality of circumferentially acting elastic members, and a damper retainer plate rotatably mounted to the back plate coaxially with the rotation axis. The back plate has a plurality of window-shaped openings separated circumferentially from one another by radial tabs. The elastic members are interposed between the driven member and the back plate in the window-shaped openings. The damper retainer plate is operatively connected to the elastic members.

A torque transmitting assembly is provided. The torque mission assembly includes a first cover plate and a second cover plate supporting a radially inner set of springs therebetween; and a first radially outer set of springs and a second radially outer set of springs in series with the first radially outer set of springs. The first radially outer set of springs are arranged for transferring torque from the second radially outer set of springs to the radially inner set of springs via the second cover plate. A method of constructing a torque transmission assembly is also provided. The method includes providing a first cover plate and a second cover plate supporting a radially inner set of springs therebetween; providing a first radially outer set of springs and a second radially outer set of springs in series with the first radially outer set of springs; and arranging the first radially outer set of springs for transferring torque from the second radially outer set of springs to the radially inner set of springs via the second cover plate.