Toyota Jidosha Kabushiki Kaisha

Shuhei Horita

Hiroyuki Amano

Yu Miyahara

Yuji Suzuki

Taiki Nakamura

Fusahiro Tsukano

Yuya Takahashi

Tadashi Sekiguchi

Morihiro Matsumoto

Atsushi Honda

Hideyuki Nishida

Hirotsugu Yoshino

Shingo Aijima

Husahiro Tsukano

A torque converter includes a housing, and a fluid-operated power transmitting portion and a vibration damping device which are accommodated within the housing and which are disposed around an axis such that the vibration damping device is located adjacent to the fluid-operated power transmitting portion in a direction of the axis, the torque converter further includes a space occupying member which occupies a part of a space formed within the housing and between the fluid-operated power transmitting portion and the vibration damping device. The space occupying member comprises a wall surface facing the fluid-operated power transmitting portion in the direction of the axis. A distance in the direction of the axis between a part of the wall surface and the fluid-operated power transmitting portion is smaller than a distance in the direction of the axis between the part of the wall surface and the vibration damping device.

Torque converter

A torsional vibration reducing device includes: a rotating body; an inertial body; a coupling member configured to transmit the torque to the rotating body and to the inertial body; and a first coupling portion and a second coupling portion, which are separately provided to either the rotating body or the inertial body. The first coupling portion engages with the coupling member so as to: restrict movement of the coupling member in a rotational direction of the rotating body; and allow movement of the coupling member in a radial direction of the rotating body. The second coupling portion engages with the coupling member such that when the rotating body and the inertial body rotate relative to each other, a contact portion of the coupling member with respect to the first coupling portion moves in the radial direction of the rotating body.

Torsional vibration reducing device

A torsional vibration damper in which vibration damping performance is ensured by preventing a contact between a rolling mass and a rotary member. A rolling mass includes a trunk penetrating through a bore. A first corner formed in an axial end of the trunk is rounded. A rotary member includes a second corner formed in the bore. an axial length of the first corner of the rolling mass is longer than an axial length of the second corner of the rotary member.

Torsional vibration damper

A torsional vibration damper in which a mass may be fitted easily into a chamber is provided. In the rotary disc, an insertion hole is formed integrally with the chamber. An opening diameter of the insertion hole is larger than an outer diameter of a flange plate of the mass, and an opening width at a boundary between the insertion hole and the chamber is larger than an outer diameter of a trunk of the mass. The retainer comprises a restricting portion that restricts an oscillating range of the mass in the chamber.

A torsional vibration damper that can be arranged in a fluid coupling to downsize a powertrain is provided. The torsional vibration damper has a mass body held in a rotary member in such a manner to be oscillated by torque pulse of the rotary member. The rotary member is arranged in an internal space of a fluid coupling in which a pump impeller, a turbine runner and a predetermined stationary member are held in a casing. A planetary unit that performs a differential action among three rotary elements is arranged in the casing. In the planetary unit, a first rotary element is connected to the stationary member, a second rotary element is connected to the rotary member, and a third rotary element is connected to the turbine runner.

A pendulum vibration damper in which a retainer is prevented from being moved or tilted in an axial direction. In the pendulum vibration damper, a restriction member formed on any one of the retainer and an inner face of the casing to be brought into contact to the other one of the retainer and the inner face of the casing when the retainer is moved or tilted in an axial direction of the rotary disc. A clearance between the casing and the rolling mass in the axial direction is shorter than a thickness of the retainer in the axial direction.

Pendulum vibration damper

A torsional vibration damper in which noise and vibrations in a planetary gear unit are suppressed is provided. In a planetary gear unit, as an inertial element is oscillated to establish an inertial torque by a relative rotation between a sun gear and a ring gear. Pinion gears are interposed between the sun gear and the ring gear at predetermined intervals, and gear dimensions of one of the pinion gears and gear dimensions of another one of the pinion gears are different from each other.

There is provided a vibration damper which is capable of damping torsional vibrations by pendulum movement of a plurality of inertial masses, and damping vibrations of plurality of order without letting the inertial masses to interfere. A distance between a center of curvature of an inner surface of a first through-hole and a center of curvature of an inner surface of a second through-hole formed in a rotary member is shorter than a distance between a center of curvature of an inner surface of a fifth through-hole and a center of curvature of an inner surface of a sixth through-hole formed in a first inertial mass. Moreover, a distance between a center of curvature of an inner surface of a third through-hole and a center of curvature of an inner surface of a fourth through-hole in a rotary member is longer than a distance between a center of curvature of an inner surface of a seventh through-hole and a center of curvature of an inner surface of an eighth through-hole formed in a second inertial mass.

Vibration damper

A torsional vibration reducing apparatus is provided. The torsional vibration reducing apparatus includes a rotating body having a rolling chamber, and a rolling body including a support shaft portion, a first flange portion, a second flange portion, a first corner portion, and a second corner portion. The support shaft portion is housed in the rolling chamber. The flange portions are located respectively at either end of the support shaft portion in an axial direction. A position defined by the support shaft portion and the first flange portion is the first corner portion, and a position defined by the support shaft portion and the second flange portion is the second corner portion. In a section of the rolling body that is along a central axis of the support shaft portion, sectional shapes of the first corner portion and the second corner portion differ from each other.

Torsional vibration reducing apparatus

A vibration damping device in which a covering member can be fixed firmly to a rotary member by a rivet is provided. In the vibration damping device, a pendulum massis held in a rotary member, and a casingis fixed to the rotary memberby a rivet. The rivetcomprises a head, a first shaftand a second shaft. The first shaftpenetrates through a first casing member, the rotary memberand the second casing member, and a tail thereof is expanded to fasten those members. The second shaftpenetrates through a driven member, and a tail thereof is expanded to fasten the driven member to the rotary member

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Numazu, Japan

Shuhei Horita