A damping member support for non-torsional force bypass around a torsional damping member includes a damping member engagement portion configured to be coupled to the torsional damping member and an intermediate portion configured to transmit a non-torsional force between a shaft and the torsional damping member.

A damper pulley for a crankshaft includes a hub mounted on one end of the crankshaft, a rim connected to the hub, an oil seal mounted on an outer surface of the hub, and a wear-resistant insert member integrally mounted on the hub and making contact with the oil seal.

A drive assembly for a vehicle drive train includes a base assembly including a base hub configured for non-rotatably connecting to an outer circumferential surface of a transmission input shaft. The base assembly includes a torsional damper fixed to the base hub. The torsional damper includes an input section and an output section drivingly connected by springs. The springs allow relative rotation between the input section and the output section. The output section of the torsional damper is non-rotatably fixed to the base hub. A hub assembly extension is configured for non-rotatably connecting to an engine crankshaft. The hub assembly extension is non-rotatably fixed to the input part of the torsional damper at an engine side of the torsional damper. The torsional damper allows relative rotation between the hub assembly extension and the base hub.

A drive assembly for a vehicle drive train includes a base assembly including a base hub configured for non-rotatably connecting to an outer circumferential surface of a transmission input shaft. The base assembly includes a torsional damper fixed to the base hub. The torsional damper includes an input section and an output section drivingly connected by springs. The springs allow relative rotation between the input section and the output section. The output section of the torsional damper is non-rotatably fixed to the base hub. The drive assembly also includes a raw hub extension configured for non-rotatably connecting to an engine crankshaft. The raw hub extension is non-rotatably fixed to the input part of the torsional damper at an engine side of the torsional damper. The torsional damper allows relative rotation between the raw hub extension and the base hub.

Methods and systems for damping torsional oscillations of downhole systems are described. The systems include a downhole string, a bit support assembly configured to support and receive a disintegration device, wherein the disintegration device is disposed on an end of the downhole string and mounted to the bit support assembly, and a damping system configured at least one of on and in the bit support assembly, the damping system comprising at least one damper element arranged in contact with a portion of the bit support assembly.

The present invention relates to a vehicle comprising: an internal combustion engine operable to rotate a crank shaft of the internal combustion engine; a transmission; at least one driving wheel rotationally connected to the transmission; a damping system arranged between the internal combustion engine and the transmission for dampening irregularity motions of the crank shaft, the damping system comprising an output splined portion; wherein the transmission is arranged for controllably rotationally connecting the output splined portion of the damping system to provide torque from the internal combustion engine to the at least one driving wheel via the transmission, wherein the output splined portion of the damping system is adapted to mate with a splined portion of a coupling shaft of the transmission for connecting the crank shaft to the transmission via the damping system.

A vibration damper structure and a fan thereof. The vibration damper structure includes a support body, a fixing seat and an elastic member. The support body has a lower end. The fixing seat has a tubular section. The tubular section has a protrusion end corresponding to the lower end of the support body and a receiving space. The receiving space has a bottom section. The elastic member is disposed in the receiving space of the tubular section and positioned between the support body and the fixing seat. Two ends of the elastic member are respectively in contact with the lower end of the support body and the bottom section of the receiving space. The vibration damper structure is applied to the fan to greatly reduce the vibration of the fan in operation.

A damper device includes an input element to which a torque from an engine is transmitted; an intermediate element; an output element; a first elastic body arranged to transmit a torque between the input element and the intermediate element; a second elastic body arranged to transmit a torque between the intermediate element and the output element; a rotary inertia mass damper that includes a mass body rotating in accordance with relative rotation between the input element and the output element and that is arranged between the input element and the output element to be parallel to a torque transmission path including the first elastic body, the intermediate element and the second elastic body; and an attenuation mechanism configured to attenuate resonance of the intermediate element.

A damping apparatus includes a damping unit 30 composed of a plurality of damping plates 36 having plasticity, a holding member 31 holding at least one ends of the damping plates 36 in a manner to allow deflection of the damping plates 36 with the damping plates 36 laminated together, and a contact member 33 provided at a position spaced from a holding position of the holding member 31, and attached to an outermost one of the damping plates 36, or extending through and held by the damping plates 36 in such a manner that it can be brought into contact with the outermost one of the damping plates 36 and can be moved in an extending direction thereof. The damping unit 30 is supported by a support mechanism 2 in such a manner that the contact member 33 can be brought into contact with an object W.

A damper pulley for a crankshaft includes a hub mounted on one end of the crankshaft, a rim connected to the hub, an oil seal mounted on an outer surface of the hub, and a wear-resistant insert member integrally mounted on the hub and making contact with the oil seal.