Abstract: In a positive torsion angle region in which a torque is transmitted from an engine side, a small hysteresis torque is generated at all times. Therefore, torsional vibrations of a small amplitude occurring during idle operation can be effectively attenuated by the small hysteresis torque, without switching to a large hysteresis torque, for example, during idle operation of the engine. As a result, the driver can be prevented from feeling uncomfortable due to switching to a large hysteresis torque during idle operation, and drivability can therefore be improved.

Abstract: A damper device includes a damper unit arranged on a motive power transmission path between a motive power source and a gear mechanism and configured for absorbing torque fluctuations that might be generated by elastic force between the motive power source and the gear mechanism. The damper device also includes a limiter unit that produces slip when the torque fluctuations have exceeded a preset value. The limiter unit is arranged on a motive power transmission path between the damper unit and the gear mechanism.

Abstract: A damper device includes: a pair of first plates axially separated from each other along a rotation axis and rotatable integrally with each other around the axis in a state where the first plates intersect the axis; a second plate including a portion positioned between the first plates, having an opening, and rotatable around the axis in a state where the second plate intersects the axis; an elastic member between the first and second plates, and elastically deformed a circumferential direction of the axis; and a third plate having a first portion positioned on an inner side of the opening and coupled to the first plates in a state where the first portion is between the first plates, and a second portion positioned on an outer side of the opening, and rotatable around the axis in a state where the third plate intersects the axis.

Abstract: A torque fluctuation absorbing apparatus includes a first side plate, a second side plate, a lining plate disposed between the side plates, a connecting member that connects the side plates at a position that is radially inward relative to the lining plate, a pressure plate disposed between the second side plate and the lining plate, and an elastic member that biases the pressure plate toward the lining plate. The lining plate is slidably sandwiched between the first side plate and the pressure plate, and the first and second side plate each includes a reinforcing portion that includes a portion that is axially curved at a location that is radially outward relative to the connecting member.

Abstract: A torque fluctuation absorber includes a first plate member being rotatable, a second plate member positioned to be axially separated from the first plate member, the second plate member being rotatable relative to the first plate member, a first friction member arranged between the first plate member and the second plate member and slidably pressed against the first plate member and the second plate member, and a first guide portion restricting the first friction member from moving radially inwardly.

Abstract: A torque fluctuation absorber includes a first annular member, a second annular member arranged to be axially separated from the first annular member, an annular and dish-shaped first disc spring arranged between the first annular member and the second annular member, a first support portion arranged between the first annular member and the first disc spring and being partially or continuously in contact with the first disc spring on a circle passing through a first predetermined radial portion of the first annular member, and a second support portion arranged between the second annular member and the first disc spring and being partially or continuously in contact with the first disc spring on a circle passing through a second predetermined radial portion of the second annular member, the second predetermined radial portion being radially different from the first predetermined radial portion of the first annular member.

Abstract: A torque fluctuation reducing apparatus includes a first main damper provided on a power transmission path between a drive source and a transmission, and reducing fluctuation torque generated between the drive source and the transmission, a second main damper provided at a transmission-side relative to the first main damper to be in series with the first main damper and reducing the fluctuation torque, the second main damper including a vibration damping property which is different from a vibration damping property of the first main damper, a dynamic damper provided between the first main damper and the second main damper, and restricting vibration at a specific resonance point of a drive system on the power transmission path by using an inertia body and an elastic force, a chamber accommodating the first and the second main dampers, and the dynamic damper, and a viscous medium enclosed in part of the chamber.

Abstract: A torque fluctuation absorber includes a first rotating member arranged to be rotatable, a second rotating member arranged in a rotatable manner relative to the first rotating member, a coil spring for buffering a torsion between the first rotating member and the second rotating member by means of an elastic force, and a cushion member arranged at an inside of the coil spring and buffering the torsion between the first rotating member and the second rotating member by means of an elastic force, wherein the cushion member includes an elastic member formed in a columnar shape, and an abrasion resistant member partly covering a side surface of the elastic member and including a greater abrasion resistance than an abrasion resistance of the elastic member.

Abstract: A torque fluctuation absorber includes a first plate member to which power of rotation is transmitted from a first rotational shaft, a second plate member arranged at a preset distance from the first plate member, a third plate member arranged between the first plate member and the second plate member and configured to transmit power of rotation to a second rotational shaft. The torque fluctuation absorber also includes a fourth plate member arranged at a preset distance from the second plate member, and a resilient member arranged between the second plate member and the fourth plate member and configured to bias the second plate member towards the third plate member. The fourth plate member includes a fulcrum point that supports a mid portion of the resilient member.

Abstract: A torque fluctuation absorbing apparatus comprises a first plate member, a second plate member disposed at a position axially offset from the first plate member, an intermediate plate member that is disposed between the first plate member and the second plate member and has a frictional sliding surface mating with the second plate member, rolling elements disposed so as to roll between the intermediate plate member and the first plate member, and resilient member that allows the intermediate plate member and the first plate member to rotate relative to each other. The intermediate plate member and the first plate member have acting sections on a surface whereon at least one of the rolling elements rolls, the acting sections press the intermediate plate member against the second plate member by a relative rotation between the intermediate plate member and the first plate member.

Abstract: A torque fluctuation absorber includes a first rotary member formed into an annular shape and including a first protruding portion formed at an inner circumferential surface, a second rotary member connected to the first rotary member, a third rotary member including a second protruding portion formed at an outer circumferential surface, a damper portion absorbing torque fluctuations caused by torsion generated between the second rotary member and the third rotary member, and an elastic member arranged between the first protruding portion and the second protruding portion and absorbing a shock generated when the first protruding portion directly makes contact with the second protruding portion when the damper portion absorbs the torque fluctuations caused by the torsion generated between the second rotary member and the third rotary member.

Abstract: A torque fluctuation absorber includes a seating member having a pivoting portion at an inner portion in a radial direction and a supporting portion, which rotationally supports the pivoting portion, at an end surface in a circumferential direction of a first and a second opening portion. When no relative rotational torsion existing between a first and a second rotational member, the pivoting portion is in contact with the supporting portion and a clearance is defined between a portion on each seating member positioned outwardly in a radial direction relative to the pivoting portion and a portion of the first and the second opening portion positioned outwardly in a radial direction relative to the supporting portion. At a first torsion angle, the portion on each seating member contacts the portion of first or second opening portion in a state where the pivoting portion is in contact with the supporting portion.

Abstract: The torque fluctuation absorber includes a flywheel fixed on a first rotating shaft by a fixation member, a damper unit connected with a second rotating shaft and absorbs fluctuation of torque occurred between the first rotating shaft and the second rotating shaft by elastic force, and a limiter unit provided on a power transmission path between the flywheel and the damper unit and inducing a slide when the fluctuation of the torque exceeded a predetermined value. A predetermined member rotates with the first rotating shaft on a power transmission path between the first rotating shaft and the limiter unit. The predetermined member has a side plate at the damper unit and a guide portion that prevents movement radially of a hub member, and the guide portion is provided at radially internal side of the fixation member.

Abstract: A damper device comprises: a first shaft that outputs rotational power from a power source; a second shaft that transmits rotational power to a gear mechanism and has outer splines; a first rotational member(s) to which the rotational power of the first shaft is transmitted; a second rotational member spline-engaged with the outer splines; a damper unit that absorbs torque fluctuation between the first and second rotational members; and an inertial body having inner splines spline-engaged with the outer splines and having an annular portion. The tooth parts of the inner splines are pressed into contact with the tooth parts of the outer splines in the circumferential direction of the inertial body.

Abstract: A torque fluctuation absorbing apparatus includes a first plate member, a second plate member rotatable relative to the first plate member, and a first friction member disposed between the first plate member and the second plate member and pressed against the first plate member in a slidable manner. The second plate member includes a first retaining surface that makes contact with the first friction member. The first friction member includes a plurality of grooves at a surface facing the first retaining surface of the second plate member, the grooves extending in a radial direction of the first friction member.

Abstract: A torque fluctuation absorber includes a first plate member being rotatable, a second plate member positioned to be axially separated from the first plate member, the second plate member being rotatable relative to the first plate member, a first friction member arranged between the first plate member and the second plate member and slidably pressed against the first plate member and the second plate member, and a first guide portion restricting the first friction member from moving radially inwardly.

Abstract: A torque fluctuation absorber includes a first plate member to which power of rotation is transmitted from a first rotational shaft, a second plate member arranged at a preset distance from the first plate member, a third plate member arranged between the first plate member and the second plate member and configured to transmit power of rotation to a second rotational shaft. The torque fluctuation absorber also includes a fourth plate member arranged at a preset distance from the second plate member, and a resilient member arranged between the second plate member and the fourth plate member and configured to bias the second plate member towards the third plate member. The resilient member includes a first end abutting against the second plate member in an area where the second plate member faces the third plate member in the axial direction, and a second end abutting against the fourth plate member.

Abstract: A torque fluctuation absorbing apparatus that includes a first assembly that absorbs a fluctuating torque generated between a first rotating shaft and a second rotating shaft that are arranged coaxially, a first end of the first assembly being connected to the first rotating shaft from the second rotating shaft side by a first connecting member, a second assembly that absorbs a fluctuating torque generated between the first rotating shaft and the second rotating shaft, the second assembly being disposed more toward the second rotating shaft side than the first connecting member and a second end thereof being connected to the second rotating shaft, and a second connecting member that connects a second end of the first assembly to a first end of the second assembly.

Abstract: A torque fluctuation absorbing apparatus includes a first side plate, a second side plate, a lining plate disposed between the side plates, a connecting member that connects the side plates at a position that is radially inward relative to the lining plate, a pressure plate disposed between the second side plate and the lining plate, and an elastic member that biases the pressure plate toward the lining plate. The lining plate is slidably sandwiched between the first side plate and the pressure plate, and the first and second side plate each includes a reinforcing portion that includes a portion that is axially curved at a location that is radially outward relative to the connecting member.

Abstract: A torque fluctuation absorber includes a first annular member, a second annular member arranged to be axially separated from the first annular member, an annular and dish-shaped first disc spring arranged between the first annular member and the second annular member, a first support portion arranged between the first annular member and the first disc spring and being partially or continuously in contact with the first disc spring on a circle passing through a first predetermined radial portion of the first annular member, and a second support portion arranged between the second annular member and the first disc spring and being partially or continuously in contact with the first disc spring on a circle passing through a second predetermined radial portion of the second annular member, the second predetermined radial portion being radially different from the first predetermined radial portion of the first annular member.