A torsional vibration damper for a drive train includes an axis of rotation, a multi-flange damper for damping torsional vibrations, a torque limiter unit for limiting a maximum transmissible torque, an outer hub connecting the multi-flange damper to the torque limiter unit for torque transmission, and an inner hub for connection to a transmission input shaft. The multi-flange damper has a plurality of flanges. The torque limiter unit is arranged radially inside the multi-flange damper and includes an inner plate and an outer plate. The outer hub is arranged radially between the multi-flange damper and the torque limiter unit and the inner hub is arranged radially inside the torque limiter unit. The outer hub includes an external toothing engaged with each of the plurality of flanges and an internal toothing engaged with the outer plate.

The invention relates to a torque transmission device (1) for the drive train of a motor vehicle, comprising an input element (2) and a cover element (16) which is connected to the input element (2) for conjoint rotation, and comprising an output element (3), wherein: the output element (3) and the input element (2) are rotatable in relation to one another via an energy accumulator device (4) and about a common axis of rotation A; a torque-limiting device (10) is located between the input element (2) and the output element (3); the torque-limiting device (10) is designed to transmit a torque between the input element (2) and the output element (3) up to a limit torque value and, when the limit torque value is exceeded, to transmit a torque at least in part or to transmit no torque at all; the torque-limiting device (10) is connected to the energy accumulator device (4) via a frictional and/or form-fitting connection (8), is connected to the input element (2) via a first frictional connection (9), and is connected to the cover element (16) via a second frictional connection (14); the torque-limiting device (10) comprises a preload element (5) for providing the frictional connections (9; 14); the preload element (5) is preloaded between the input element (2) and the cover element (16); a radially inner region of the preload element (5) is provided with at least two contact elements (17a, 17b, 17c, 17d, 17e, 17f); the contact elements (17a, 17b, 17c, 17d, 17e, 17f) are provided on a radius (r) and protrude axially out of the preload element (5) in the direction of the input element (2); the contact elements (17a, 17b, 17c, 17d, 17e, 17f) are at an angular distance (α) from one another; and the contact elements (17a, 17b, 17c, 17d, 17e, 17f) form the first frictional connection with the input element (2).

A damper device includes: a first rotary body including a first plate rotating around a rotation shaft and a second plate disposed facing the first plate and integrally rotating with the first plate; a second rotary body rotating relative to the first rotary body; a control plate disposed between the first plate and the second rotary body in an axial direction and engaged with the second rotary body to rotate integrally therewith; a first thrust member a part of which is disposed between the first plate and the control plate in the axial direction and engaged with the first plate to rotate integrally therewith; and a second thrust member a part of which is disposed between the second plate and the second rotary body and engaged with the second plate to rotate integrally with the first rotary body.

A drive assembly for a motor vehicle drive train is provided. The drive assembly includes a first subassembly configured for connecting to an engine crank. The first subassembly includes a slip clutch plate. The drive assembly also includes a second subassembly connected to the first subassembly via a radially outer portion of the slip clutch plate. The second subassembly includes a damper assembly. A method of forming a drive assembly for a motor vehicle drive train is also provided.

A damper device includes a damper unit and a torque limiter unit. The damper unit includes first and second plates each including a plurality of window portions, a hub flange including a plurality of window holes, and a stopper mechanism. The first plate includes an engaging portion and a fixing portion fixed to the second plate. The engaging portion and the fixing portion are disposed radially outside the plurality of window portions. The hub flange includes a protrusion disposed circumferentially between and radially outside adjacent two of the plurality of window holes. The stopper mechanism is configured to be actuated by contact of the protrusion with the engaging portion. A fixation member, by which the first plate and the torque limiter unit are fixed, is disposed circumferentially between adjacent two of the plurality of window portions as seen in a direction along a rotational axis.

A torque limiter embedded damper device includes a torque limiter unit and a damper unit. The damper unit includes a first rotor, a second rotor, and a stopper mechanism. The second rotor includes a flange axially opposed to the first rotor. The stopper mechanism restricts an angle of relative rotation between the first rotor and the second rotor to a predetermined angular range. The stopper mechanism includes a cutout and a stop pin. The cutout is provided in the flange of the second rotor. The stop pin is fixed to the first rotor. The torque limiter unit includes a friction plate having an annular shape. The annular friction plate is fixed at an inner peripheral part thereof to an outer peripheral part of first rotor or the second rotor by a fixation member. The fixation member is fastened in a state of penetrating the cutout of the flange.

A power transmission device includes a flywheel and a damper device. The flywheel includes a plurality of fixation holes. The damper device includes an input rotary member, an output rotary member, and a pair of first elastic members. The input rotary member and output rotary member each include a plurality of assembling holes disposed in corresponding positions to the plurality of fixation holes of the flywheel. The plurality of assembling holes are arranged in a circumferential direction such that two pairs of the assembling holes, each pair including two adjacent assembling holes, are each disposed at a larger interval than remaining assembling holes to produce a pair of accommodation spaces. A pair of first accommodation portions, accommodating the pair of first elastic members, is disposed radially outside the pair of accommodation spaces.

A damper device includes a first rotor disposed to be rotatable, a second rotor rotatable relative to the first rotor, and a plurality of elastic members configured to elastically couple the first rotor and the second rotor in a circumferential direction. The first rotor includes a first plate and a second plate. The first and second plates are axially opposed to each other, and fixed to be immovable in both axial and circumferential directions. The first plate includes a plurality of first holding portions and a plurality of bent portions. The plurality of first holding portions hold the plurality of elastic members. The plurality of bent portions are provided on an outer peripheral end of the first plate, and bent toward the second plate. The second plate includes a plurality of second holding portions holding the plurality of elastic members together with the plurality of first holding portions.

Provided is a torsional vibration reducing device in which a mass damper configured to reduce ripples of torque by inertia moment of an inertial body and a spring damper configured to reduce ripples of torque to be transmitted between an input-side rotational member and an output-side rotational member by an elastic body being compressed are placed side by side in a predetermined axis direction. The torsional vibration reducing device includes a bolt configured to fix the inertial body and the input-side rotational member to each other in the predetermined axis direction by being inserted from the input-side rotational member side. The input-side rotational member includes a receiving portion recessed toward the mass damper side such that at least part of a head of the bolt in its height direction is received by the receiving portion.

Provided is a smaller torque limiter. A torque limiter (30) according to a representative embodiment of the present invention is characterized by including: a first rotary body (32) to be rotated by a drive source; a first friction body (33) locked to the first rotary body; a second friction body (34) stacked on the first friction body and to be rotated with rotation of the first friction body by a friction force between the first friction body and the second friction body; a second rotary body (35) locked to the second friction body; at least one disc spring (37) for biasing the first friction body and the second friction body in the stacking direction of the first friction body and the second friction body; and a fastening member (39) for applying a compressive force to the disc spring.