Exedy Corporation

Ken Mototsune

Shinji Fujimoto

Takeshi Kawamoto

Hiroyuki Ushio

Yoshihiro Matsuoka

Kozo Yamamoto

Tatsuyuki Aoki

Naoki Tomiyama

Kazuhito Maeda

A lock-up device includes an input rotary member into which the torque is inputted and an output rotary member rotatable relatively to the input rotary member in a predetermined torsion angular range. The output rotary member outputs the torque. The lock-up device also includes a plurality of first coil springs coupling the input rotary member and the output rotary member. The plurality of first coil springs are actuated in an entirety of the torsion angular range. The lock-up device further includes a plurality of second coil spring pairs or sets on either an outer peripheral side or an inner peripheral side of the plurality of first coil springs so as to be actuated in parallel to the plurality of first coil springs. The two or more coil springs have different magnitudes of stiffness and are actuated in series.

Lock-up device for torque converter

A lock-up device is disposed between a front cover and a turbine in a torque converter to mechanically connect the front cover and the turbine. The lock-up device includes a clutch part and a release part. The clutch part is disposed in a power transmission path from the front cover to the turbine and is configured to be in a clutch-on state of transmitting a power from the front cover to the turbine in a set posture. The release part is configured to be actuated by a hydraulic pressure being increased in a space on a turbine-side of the piston to turn the clutch part from the clutch-on state to a clutch-off state and to block transmission of the power from the front cover to the turbine.

A lock-up device having multistage torsional characteristics includes a retaining plate, a driven plate, a plurality of pairs of outer peripheral side torsion springs configured to elastically couple the both plates, a support plate and a plurality of inner peripheral side torsion springs. The support plate is rotatable relative to the retaining plate and the driven plate, and causes the outer peripheral side coil springs in each pair to act in a series-like manner. Each inner peripheral side torsion spring has a length shorter than that of each outer peripheral side torsion spring. Additionally, the support plate is configured to be restricted from rotating relative to the driven plate when stopper parts of the support plate contact intermediate stopper parts of the driven plate.

A lock-up device includes a clutch portion and a damper mechanism. The clutch portion includes a clutch output member, a clutch plate, an oil chamber plate having a disc shape and a piston. The oil chamber plate is disposed between a front cover and an inner peripheral part of a turbine, while being axially immovable with respect to the front cover. The piston is disposed between the front cover and the oil chamber plate while being axially movable. The piston forms a first oil chamber for lock-up actuation together with the oil chamber plate, and forms a second oil chamber for lock-up releasing together with the front cover.

A lock-up device includes a clutch part and a damper mechanism. The clutch part includes a clutch input member, a clutch output member, a drive plate, a driven plate, a second flange and a piston. The second flange is mounted between a front cover and an inner peripheral part of a turbine to be axially immovable with respect to the front cover, and forms a lock-up oil chamber. The piston is mounted between the front cover and the second flange, forms a lock-up oil chamber together with the second flange therebetween, and is configured to be moved toward the front cover by an operating oil to be supplied to the lock-up oil chamber.

A lock-up device is a device disposed in a space produced between a front cover and a turbine in a torque converter so as to mechanically connect the front cover and the turbine, and includes a clutch part and a release part. The clutch part is disposed in a power transmission path from the front cover to the turbine, and is configured to be in a clutch-on state of transmitting a power from the front cover to the turbine in a set posture. The release part is configured to be actuated by means of a hydraulic pressure, turn the clutch part of the clutch-on state into a clutch-off state, and block transmission of the power from the front cover to the turbine.

A lock-up device includes a clutch part, an input plate, an output plate, torsion springs and an input plate support member. The clutch part is disposed between a front cover and a turbine, and is configured to allow or block transmission of a torque. The input plate is coupled to a clutch output member of the clutch part. The output plate is fixed to a turbine shell. The torsion springs are disposed between the input plate and the output plate, and absorb and attenuate a torsional vibration. The input plate support member is fixed to a front cover side of a turbine shell and positions the input plate in a radial direction and an axial direction.

A lock-up device includes a clutch part and a damper mechanism. The damper mechanism includes an input plate, an output plate, a plurality of torsion springs, an intermediate member and a restriction member. The intermediate member is configured to cause at least two of the torsion springs to act in series. The restriction member is fixed to a clutch output member of the clutch part, while being disposed such that a part of the intermediate member is interposed between the input plate and the restriction member in an axial direction. The intermediate member is restricted from moving in a radial direction by the clutch output member, while being restricted from moving in the axial direction by the input plate and the restriction member.

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Neyagawa, Japan

Ken Mototsune