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 axia
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.
대표청구항▼
1. A lock-up device for a torque converter, the lock-up device being configured to transmit a torque from a front cover to a transmission-side member through a turbine of the torque converter, the lock-up device comprising: a clutch part disposed between the front cover and the turbine, the clutch p
1. A lock-up device for a torque converter, the lock-up device being configured to transmit a torque from a front cover to a transmission-side member through a turbine of the torque converter, the lock-up device comprising: a clutch part disposed between the front cover and the turbine, the clutch part being configured to allow or block transmission of the torque; anda damper mechanism configured to transmit the torque from the clutch part to the turbine and to absorb and attenuate a torsional vibration, the clutch part including a clutch input member disposed between the front cover and the turbine while being coupled to the front cover;a clutch output member configured to output the torque to the damper mechanism;a plurality of clutch plates configured to transmit the torque between the clutch input member and the clutch output member;a lock-up oil chamber plate formed in a disc shape, the lock-up oil chamber plate being mounted between the front cover and an inner peripheral part of the turbine to be axially immovable with respect to the front cover, the lock-up oil chamber plate forming a lock-up oil chamber; anda piston mounted between the front cover and the lock-up oil chamber plate to be axially movable, the piston forming the lock-up oil chamber together with the lock-up oil chamber plate therebetween, the piston being configured to be moved toward the front cover by an operating oil to be supplied to the lock-up oil chamber to cause the clutch plates to be pressed against each other;the turbine including a tubular portion on an inner peripheral end part thereof, the tubular portion being coupled to the transmission-side member;the clutch part further including an annular boss, the annular boss being fixed to the front cover while extending from an inner peripheral part of the lock-up oil chamber plate toward the front cover, the annular boss allowing the piston to axially slide on an outer peripheral surface thereof, the annular boss allowing the tubular portion of the turbine to be inserted into an inner peripheral part thereof, the annular boss having an oil path formed for supplying the operating oil to the lock-up oil chamber, andthe clutch part further including a lock-up releasing oil chamber plate mounted between the front cover and the piston to be axially immovable with respect to the front cover, the lock-up releasing oil chamber plate being formed in a disc shape and forming a lock-up releasing oil chamber, a seal member being disposed between the lock-up releasing oil chamber plate and the piston to seal the lock-up releasing oil chamber with respect to the piston. 2. The lock-up device for a torque converter recited in claim 1, wherein the annular boss is a member formed separately from the lock-up oil chamber plate, andthe lock-up oil chamber plate is fixed to the outer peripheral surface of the annular boss. 3. The lock-up device for a torque converter recited in claim 1, wherein the annular boss is formed by extending an inner peripheral end part of the lock-up oil chamber plate toward the front cover. 4. The lock-up device for a torque converter recited in claim 1, wherein inner and outer diameters of the lock-up oil chamber and inner and outer diameters of the lock-up releasing oil chamber are equal to each other. 5. The lock-up device for a torque converter recited in claim 1, wherein the annular boss has an oil path formed for supplying the operating oil to the lock-up releasing oil chamber. 6. The lock-up device for a torque converter recited in claim 1, wherein the clutch input member is formed in a disc shape and has an inner peripheral end part extending toward the turbine,the clutch output member is disposed radially outward of the clutch input member, the clutch output member being formed in a disc shape and having an inner peripheral end part extending toward the front cover,the clutch plates include a first clutch plate and a second clutch plate, the first clutch plate being formed in a disc shape and being engaged at an inner peripheral end part thereof with the inner peripheral end part of the clutch input member to be axially movable and non-rotatable relative thereto, the second clutch plate being formed in a disc shape and being engaged at an outer peripheral end part thereof with the inner peripheral end part of the clutch output member to be axially movable and non-rotatable relative thereto, andthe piston and the lock-up oil chamber plate are disposed radially inward of the clutch output member.
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이 특허에 인용된 특허 (1)
Simpson, William Ralph, Torque converter assembly.
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