A standpipe assembly for a rotorcraft includes a slip ring positioned within the mast of the rotorcraft. The slip ring includes a stator rotationally connected to a rotor. A flexible coupling is connected to the stator and a standpipe tube is connected to the flexible coupling. The flexible coupling is capable of angular, axial, and torsional displacement.

A shaft arrangement with two concentrically arranged shafts, in particular two concentric hollow shafts that are coupled to the drive side or the output side of an engine, wherein the shafts respectively have envelope elements that are connected to at least one elastically bending connection element, wherein the torque transmission between the concentric shafts is effected by tensile forces in the elastically bending envelope elements. The invention also relates to an aircraft engine with such a shaft arrangement.

A coupling for allowing torque transmission between a first and second shaft, the coupling comprising: a cup-shaped portion provided at a first end of said first shaft and a first end of said second shaft being positioned within said cup-shaped portion; and said coupling further comprising a biasing means positioned between said first and second shafts, such that said biasing means is in contact with both of said first and second shafts. A shaft system can include the first coupling in combination with a third shaft and a second coupling that is provided between the third shaft and either a second end of said first shaft or a second end of said second shaft. The second coupling is identical to the first coupling.

A soft actuator includes a power input shaft, and multiple electromagnetic clutches are coaxially installed in series on the power input shaft. A bending elastic part is arranged between the thrust plate of each electromagnetic clutch and the gear frame of the electromagnetic clutch. The bending elastic part is installed on the sleeve of the gear frame and in contact with the baffle of the gear frame. The bending elastic part is connected with the clutch output gear of the electromagnetic clutch through the gear frame. The gear frame is fixedly connected with the clutch output gear and rotates coaxially.

A hydrokinetic torque coupling device for a motor vehicle, comprises a torque input element (11) intended to be coupled to a crankshaft (1), an impeller wheel (3) non-moveably coupled to the torque input element (11) and configured to hydrokinetically drive a turbine wheel (4), a torque output element (8) intended to be coupled to a transmission input shaft (2), a clutch (10) configured to rotationally couple the torque input element (11) and the torque output element (8) in an engaged position through a damping device (18, 22) and to rotationally uncouple the torque input element (11) and the torque output element (8) in a disengaged position. The damping device (18, 22) is configured to act against the rotation of the torque input element (11) relative to the torque output element (8), in the engaged position of the clutch (10).

A belt pulley decoupler is provided for transmitting drive torque from belts of an auxiliary unit belt drive to the shaft of one of the auxiliary units, including: a belt pulley, a hub secured to the shaft, and a series circuit arranged in the drive torque flow between the belt pulley and the hub and including a decoupler spring and a wrap-around band that extends in the direction of the rotational axis of the belt pulley decoupler and is arranged radially between the belt pulley and the decoupler spring. Both ends of the wrap-around band open out radially when the drive torque is transmitted, the first end of the wrap-around band is braced against the inner surface of a first sleeve rotationally fixed in the belt pulley, and the second end of the wrap-around band is braced against the inner surface of a second sleeve rotationally mounted in the first sleeve.

A belt pulley decoupler is provided for transmitting drive torque from belts of an auxiliary unit belt drive to the shaft of one of the auxiliary units, including: a belt pulley, a hub secured to the shaft, and a series circuit arranged in the drive torque flow between the belt pulley and the hub and including a decoupler spring and a wrap-around band that extends in the direction of the rotational axis of the belt pulley decoupler and is arranged radially between the belt pulley and the decoupler spring. Both ends of the wrap-around band open out radially when the drive torque is transmitted, the first end of the wrap-around band is braced against the inner surface of a first sleeve rotationally fixed in the belt pulley, and the second end of the wrap-around band is braced against the inner surface of a second sleeve rotationally mounted in the first sleeve.

A parallel hybrid power transmission mechanism includes a crank shaft, a driven device to which a power of an engine and/or a motor generator is transmitted, an input shaft disposed on the driven device, a flywheel connected to the crank shaft, a rotor disposed on the motor generator, including a first connecting portion connected to an outside of the flywheel, the rotor being configured to supply and receive a rotational power to and from the flywheel through the first connecting portion, a coupling arranged independently from the rotor, including a second connecting portion connected to an inside of the flywheel, the coupling being configured to receive the rotational power of the flywheel through the second connecting portion, and an intermediate shaft connecting the coupling and the input shaft to each other, the intermediate shaft being configured to transmit the rotational power received by the coupling to the input shaft.

A flexible coupling includes a first hub, a flexible insert having a plurality of exterior lobes and a plurality of interior lobes, a retainer having an interior which engages the exterior lobes of the flexible insert, and a second hub having an exterior surface contoured to engage the interior lobes of the flexible insert. In the event that the flexible insert were to shear or tear during operation, protruding teeth on wings of the second hub will engage sidewalls of openings formed in an inner lip of the retainer, thereby preventing the second hub from going into a potentially damaging free spin mode.

A claw coupling includes two coupling elements disposed in opposite relationship and having confronting end face surfaces from which claws engage alternately into one another. A pressure body ring, disposed between the two coupling elements, includes a ring element and pressure bodies which project radially outwards from the ring element and are respectively received between two adjacently disposed claws of the coupling elements. Some pressure bodies have each an axially projecting spacer with a contact surface which, when a predefined torque is transmitted via the claw coupling, is pressed against a contact surface area of the end face surface of an adjacent coupling element. The contact surface area is slanted or curved such that, in a no-load state of the claw coupling an axial distance between the contact surface of the spacer and the contact surface area of the end face surface increases in a radially outwards direction.