A method of assembling a damper device includes overlapping a first support portion of a first rotor and a first accommodation portion of a second rotor to eliminate an axial offset therebetween; disposing a first elastic member in the first support portion and the first accommodation portion; overlapping a second support portion of the first rotor and a second accommodation portion of the second rotor to eliminate an axial offset therebetween by simultaneously compressing the first elastic member and rotating the second rotor relative to the first rotor to a first-side in a rotational direction; disposing a second elastic member in the second support portion and the second accommodation portion; and simultaneously compressing the second elastic member and rotating the second rotor relative to the first rotor to a second-side in the rotational direction by angle corresponding to the offset between the first support portion and the first accommodation portion.

A shock-absorbing twisting structure includes a first seat and a second seat. The first seat includes an elastic member. A stop member is arranged at one side of the first seat. The second seat is formed with a receiving chamber that is fit over the first seat, such that the elastic member is set in elastic engagement with and is supported between the first seat and the second seat. A main axle penetrates through the second seat and is received in the first seat to set the second seat in a rotatable condition. An elastic unit is arranged at each of two sides of the receiving chamber and the stop member.

An apparatus for damping torsional vibrations in a drivetrain, including a drive device and an output device, which drive device and output device are arranged so as to be rotatable around a common axis, a damping device that connects the drive device and the output device to one another, and a thrust bearing device for axial support of drive device and the output device. The drive device, cover device, and thrust bearing device are arranged such that a partially enclosed spatial region is formed, and at least one damping element of the damping device is arranged in the spatial region. Elements of the drive device, the cover device, the output device and the thrust bearing device are arranged to inhibit liquid entry into the spatial region.

An uncoupling pulley includes a wheel rim including a first area, intended for receiving a belt connecting the wheel rim to a first power-transmission element, and a second area extending from the first area; a hub rigidly connected to a second power-transmission element; a ring gear including a first portion located under the second area and a second portion presented in the shape of a resilient cylindrical skirt extending, from the first portion, along the longitudinal axis, the cylindrical skirt of the ring gear including a plurality of longitudinal slots and consequently a plurality of portions separated from each other by one of the slots, the ring gear being capable of rotating relative to the wheel rim; and a device for driving the ring gear; and a resiliently deformable element, one end of which is attached to the hub and another end of which is attached to the ring gear.

A decoupler of a drive torque transmission between the belt of an auxiliary unit belt drive and the shaft of one of the auxiliary units, includes: a belt pulley, a hub to be secured to the shaft, a first spring plate having a rotary stop arranged in the drive torque flow on the belt pulley side, a second spring plate having a rotary stop arranged in the drive torque flow on the hub side, a torsion spring having spring ends, the peripheral end faces of which rest on the rotary stops and introduce the force component of the drive torque into the radially widening torsion spring, and a torsional vibration damper having a first friction contact surface arranged in the drive torque flow from the belt pulley and a second friction contact surface arranged in the drive torque flow on the hub side.

A torsional vibration damper that a torsional vibration damper having a planetary gear unit, and a manufacturing method of the torsional vibration damper for limiting damages on gears of the planetary gear unit due to dimension errors. In the planetary gear unit, at least one of a sun gear, a ring gear, and a set of planetary gears is/are formed by a press forming method. The gear formed by the press forming method is engaged with the remaining gears in such a manner that a thinner portion of each tooth is individually engaged with a thicker portion of the adjacent teeth of the remaining gears.

Intermediate plate apparatus and related damper assemblies for use with vehicles are disclosed. A disclosed vehicle torque converter includes a clutch and a torsional vibration damper configured to receive a torque from the clutch when the clutch is engaged and dampen a torsional vibration in the torque. The torsional vibration damper includes a driven plate, a retainer plate, a first spring member, a second spring member, and an intermediate plate positioned radially outward relative to the driven plate and the retainer plate. The intermediate plate includes a body that defines an annular cavity though which the first and second spring members extend. The body is configured to engage inner and outer radial portions of the respective first and second spring members to maintain bend radii of the respective first and second spring members.

A shock-absorbing twisting structure includes a first seat and a second seat. The first seat includes an elastic member. A stop member is arranged at one side of the first seat. The second seat is formed with a receiving chamber that is fit over the first seat, such that the elastic member is set in elastic engagement with and is supported between the first seat and the second seat. A main axle penetrates through the second seat and is received in the first seat to set the second seat in a rotatable condition. An elastic unit is arranged at each of two sides of the receiving chamber and the stop member.

A torsional vibration damper, including: a hub supported for rotation around an axis of rotation; a first damper stage including a first damper flange non-rotatably connected to the hub and a first spring engaged with the first damper flange; a second damper stage including a second damper flange and a second spring, radially off-set from the first spring, and engaged with the second damper flange; and a friction control plate non-rotatably connected to the hub, free of contact with the first spring and free of contact with the second spring, and directly engaged with the second damper stage.

The present damper device includes a large hysteresis mechanism, generating a large hysteresis torque, and a hysteresis inhibiting mechanism. In a positive-side torsional region, when relative rotation is performed until reaching a maximum torsion angle from a neutral position, the hysteresis inhibiting mechanism deactivates the large hysteresis mechanism until the relative rotation reaches a first torsion angle from the neutral position, but activates the large hysteresis mechanism until the relative rotation reaches the maximum torsion angle from the first torsion angle; and when the relative rotation is performed until reaching the neutral position from the maximum torsion angle, the hysteresis inhibiting mechanism deactivates the large hysteresis mechanism until the relative rotation reaches a second torsion angle less than the first torsion angle from the maximum torsion angle, but activates the large hysteresis mechanism until the relative rotation reaches the neutral position from the second torsion angle.