A system for absorbing vibration and transmitting torque from a rotating power source to a rotatable load includes a rotatable driving member configured as an input to be driven by the power source to rotate about an axis of rotation. The system has a cam plate with a cam surface. A spring is configured to extend lengthwise in a radial direction relative to the axis of rotation. The spring is configured to be compressed due to the cam surface during relative rotation of the driving member and a driven member when the cam plate is operatively connected to rotate in unison with said one of the driving member and the driven member. The spring therefore has an effective spring rate dependent upon the cam surface, compression of the spring absorbs torsional vibration of the driving member, and the cam plate.

The present invention discloses a torque converter for a vehicle that may be applied as a torque converter having a torsional damper and has a driven plate which is formed with curved portions, and springs which are disposed in a longitudinal direction and apply elasticity to the curved portions, thereby increasing a limitation on an operating radius of the torsional damper and implementing low rigidity and a wide angle.

A torque converter for a vehicle according to the present invention includes: a front cover; an impeller which is coupled to the front cover and rotates together with the front cover; a turbine which is disposed at a position facing the impeller; a reactor which is positioned between the impeller and the turbine and changes a flow of oil flowing from the turbine to the impeller; a lock-up clutch which has a piston that directly connects the front cover and the turbine; and a torsional damper which includes a pair of retaining plates that receives driving power of an engine from the turbine or the lock-up clutch, and a driven plate that is disposed between the retaining plates, the torsional damper being coupled to the lock-up clutch and absorbing impact and vibration applied in a rotation direction; in which multiple spring assembly seating portions are formed in the retaining plates, spring assemblies are disposed in the multiple spring assembly seating portions so as to impart elasticity in a direction from a circumference of the torsional damper to an rotation axis, the driven plate has an approximately circular plate shape, multiple curved portions and multiple edge portions are formed on an outer circumferential surface of the driven plate, each of the curved portions has a curvature that is more gradual than an imaginary circumference defined by a maximum diameter of the driven plate, and the spring assemblies are in contact with the curved portions to apply elasticity to the curved portions.

The invention relates to a torque-transmission device (1), in particular for a motor vehicle, including a torque-input element (7), intended for being rotatably coupled with a crankshaft of an engine, an intermediate element (19) and a torque-output element (11), intended for being rotatably coupled with a gearbox input shaft, first damping means being mounted between the torque-input element (7) and the intermediate element (19) and second damping means being mounted between the intermediate element (19) and the torque-output element (11), the torque-input element (7), the torque-output element (11) and the intermediate element (19) being capable of pivoting relative to one another about an axis (X), characterised in that the first damping means (20, 21) are capable of exerting a force directed circumferentially or, respectively, a force comprising a radial component, the second damping means (21, 20) being capable of exerting a force comprising a radial component or, respectively, a force directed circumferentially.

A damper device includes first inner springs configured to transmit a torque between a drive member and an intermediate member, second inner springs configured to transmit a torque between the intermediate member and a driven member, and a rotary inertia mass damper including a sun gear serving as a mass body rotating with relative rotation of the drive member to the driven member. The rotary inertia mass damper is provided in parallel to a torque transmission path including the intermediate member, the first inner springs and the second inner springs. A damping ratio of the intermediate member determined based on a moment of inertia J.sub.2 of the intermediate member and rigidities k.sub.1 and k.sub.2 of the first and the second inner springs and is less than a value.

A torsional vibration damper comprises an axially moveable locking piston including a piston plate, a torque input member including a cover plate, a support plate disposed axially opposite the cover plate and a supporting member mounted to both the cover and support plates, and a unitary radially elastic output member pivotable relative to and elastically coupled to the torque input member. The output member is disposed axially between the cover plate and the piston plate. The output member includes an output hub and a curved elastic blade configured to elastically and radially engage the supporting member and to elastically bend in the radial direction upon rotation of the cover plate with respect to the output member. The cover plate at least partially covers an axially first outer surface of the output member. The support plate partially covers an axially second outer surface of the output member.

A flywheel apparatus includes a damper, and a mass ring including a first surface facing a first side in an axial direction, a second surface facing a second side and a first circumferential surface facing an inner side in a radial direction. The apparatus includes a drive plate including a first wall portion including a third surface being in contact with the second surface, and a plurality of protruding portions, each of the plurality of protruding portions including an end surface configured to fit to the first circumferential surface. The drive plate is configured such that the mass ring is concentrically attachable to the drive plate by the fitting of the end surfaces and the first circumferential surface to each other.

A system for absorbing vibration and transmitting torque from a rotating power source to a rotatable load includes a rotatable driving member configured as an input to be driven by the power source to rotate about an axis of rotation. The system has a cam plate with a cam surface. A spring is configured to extend lengthwise in a radial direction relative to the axis of rotation. The spring is configured to be compressed due to the cam surface during relative rotation of the driving member and a driven member when the cam plate is operatively connected to rotate in unison with said one of the driving member and the driven member. The spring therefore has an effective spring rate dependent upon the cam surface, compression of the spring absorbs torsional vibration of the driving member, and the cam plate.

A powertrain structure includes a drive shaft and a driven shaft disposed coaxially, with end surfaces opposed to each other, and a torque damper interposed between the shafts and having half bodies fitted to a shaft end parts of the drive and driven shafts, with the half bodies joined together by engagement of opposed, outer circumferential end surfaces thereof and a damper spring interposed therebetween such that it straddles drive-side and driven-side spring recesses respectively formed in the opposed surfaces of the half bodies. One of two fitting parts provided between the half bodies and the respective shafts has a smaller clearance and the other has an larger clearance in the radial direction of the shafts.

A system for absorbing vibration and transmitting torque from a rotating power source to a rotatable load includes a rotatable driving member configured as an input to be driven by the power source to rotate about an axis of rotation. The system has a cam plate with a cam surface. A spring is configured to extend lengthwise in a radial direction relative to the axis of rotation. The spring is configured to be compressed due to the cam surface during relative rotation of the driving member and a driven member when the cam plate is operatively connected to rotate in unison with said one of the driving member and the driven member. The spring therefore has an effective spring rate dependent upon the cam surface, compression of the spring absorbs torsional vibration of the driving member, and the cam plate.

A belt pulley arrangement with a belt pulley that is fastenable to rotate on a shaft, a torsion spring arranged within the belt pulley for enabling a transmission of torque between the belt pulley and shaft. The torsion spring acts with one end against the shaft and with an other end against the belt pulley. A looped flat spiral spring is arranged radially between the belt pulley and the torsion spring and acting as a free-running clutch. The torsion spring is arranged on one of its axial ends in a first sleeve that is connected so that it can rotate with a radial inner lateral surface of the belt pulley. The looped flat spiral spring is arranged radially between the first sleeve and the torsion spring, and contacts, in its extended state, at least in some sections on the inner lateral surfaces of the first sleeve and belt pulley.