A flexible-drive overrunning alternator pulley includes a shaft that includes a flange disposed at a first end of the shaft; an axle extending from a first side of the flange to a second end of the shaft; a shaft sleeve that includes first splines that include one or more teeth; a spring that includes a first end and a second end; and a bearing that includes: an inner bore extending through the bearing; an upper portion of the bearing including second splines that include one or more teeth; a middle portion of the bearing that includes a roller, wherein the roller is adapted to engage the upper portion of the bearing; and a lower portion of the bearing that includes a chamber adapted to receive a portion of the roller of the middle portion.

In an aspect, a clutched device is provided, including a hub, a pulley and a hub drive clutch. The hub defines an axis and is connectable to a rotatable shaft of a rotary device. The pulley is rotatable relative to the hub and is engageable with an endless drive member. The hub drive clutch is a wrap spring clutch and is controllable to operatively connect the pulley to the hub for driving the hub in a first rotational direction. An isolation spring is provided and operatively connects the hub to the pulley when the hub drives the pulley in the first rotational direction. Optionally, a pulley overrun clutch is provided and permits the pulley to overrun the hub in the first rotational direction.

A belt pulley decoupler for the drive torque transmission between a belt of a starter-generator belt drive and the starter generator is provided. A hub is fastened on a generator shaft of the starter generator. A decoupler spring is configured to transmit drive torque of the belt from the belt pulley to the hub when the starter generator is powered. A rotary stop has a stop part on the belt pulley and a stop part on the hub. The rotary stop is configured to transmit drive torque of the generator shaft from the hub to the belt pulley when the starter generator is driving the belt. The decoupler spring is loaded in both torque directions and participates in the transmission of the drive torque from the hub to the belt pulley when the starter generator is driving the belt.

A clutch device includes a shaft member, an outer rotor provided on a radially outer side of the shaft member, a clutch module configured to selectively switch between a free state where the shaft member and the outer rotor are allowed to rotate relatively and a lock state where the shaft member and the outer rotor are not allowed to rotate relatively, a coil spring configured to absorb a rotational fluctuation between the shaft member and the outer rotor in the lock state, and a bearing configured to support the shaft member and the outer rotor to rotate relatively is in the free state, and the clutch module is provided on the radially outer side of the shaft member, and the coil spring configured to absorb the rotational fluctuation is provided further radially outwards than the clutch module.

A pulley decoupler for a drive train of a motor vehicle is disclosed for eliminating or reducing rotation-related irregularities transmitted by a crankshaft. The pulley decoupler comprises a pulley hub, an arc spring flange, and a torsional vibration damper flange of a torsional vibration damper. In embodiments, the pulley hub, the arc spring flange, and the torsional vibration damper flange are configured to be non-rotatably mounted on a crankshaft by at least one crankshaft screw. The pulley hub has an outer lateral surface region on which both the torsional vibration damper flange and the arc spring flange are received and on which they are configured to be non-rotatably mounted.

A multi-axial unidirectional power transmission system includes a transmission unit and a resistance unit. The transmission unit includes a first main shaft and a transmission wheel provided on the first main shaft. The resistance unit includes a second main shaft and a damping wheel mounted on the second main shaft. The two transmission wheels and the damping wheel can be placed flat on the body since they are mounted on different main shafts, thereby making the whole plane of the multi-axis unidirectional power transmission system consistent, thus achieving the effects of space saving, convenient storage and convenient transportation.

A sealing structure with a torsional damper and an oil seal includes a damper pulley serving as a torsional damper and an oil seal. The damper pulley has an annular hub pocket that is recessed in the outer side direction and extends in the circumferential direction along a boss part of a hub. The oil seal includes a side lip that extends toward the outer side. An outer circumferential surface of the hub pocket increases in a diameter toward the outer side, the side lip of the oil seal does not enter inside the hub pocket, and an annular gap is formed between an outer side end of the side lip and an inner side end of the outer circumferential surface of the hub pocket.

An overrunning alternator pulley includes: a shaft including a flange disposed at a first end of the shaft, an axle extending from a first side of the flange to a second end of the shaft, the second end of the shaft being opposed to the first end of the shaft, first splines including one or more teeth, the one or more teeth being disposed on the axle proximate to the flange, a pulley including an inner bore extending through the pulley, and a bearing adapted to engage the first splines, in which the bearing transmits torque when a relative rotation between the pulley and the shaft is in a first direction, and the bearing overruns when the relative rotation between the pulley and the shaft is in a second direction opposite to the first direction.

A power transmission device includes an electromagnet, a rotor, an armature and a hub that couples the armature to a shaft of a driving target device. The hub includes an outer hub coupled to the armature, an inner hub coupled to the shaft, and an elastic member interposed between the outer hub and the inner hub. An outer peripheral side of the inner hub includes plural extending parts each extending outward in a radial direction. An inner peripheral side of the outer hub includes an inner peripheral side wall that overlaps with the extending parts in a rotational direction and surrounds the extending parts. The elastic member is disposed in an unbonded state with respect to at least one of the inner hub and the outer hub between the outer peripheral side of the inner hub and the inner peripheral side of the outer hub.

A device (1) for transmitting torque for driving an auxiliary unit, in particular an alternator, preferably in a motor vehicle, and for damping torsional vibrations, said device comprising driving means (2) that can be driven about an axis of rotation (4) by an internal combustion engine, and output drive means (3) rotatable about the axis of rotation (4) that are arranged and designed for driving the auxiliary unit, wherein at least one axial front face of the driving means (2) and/or of the output drive means (3) carries permanent magnet means (10, 11) which allow torques to be transmitted between the driving means (2) and the output drive means (3) and which allow torsional vibrations to be dampened, the poles (13, 14, 15, 16) of the permanent magnet means (10, 11) being arranged in at least one radial plane, characterized in that the permanent magnet means (10, 11) comprise a plurality of permanent magnet elements (17) arranged next to each other in the circumferential direction, these permanent magnets (17) adjoining each other, in particular being directly in contact or fixed to each other via an adhesive layer of less than 2 mm thickness, and/or that the permanent magnet means (10, 11) comprise at least one shaped part made of plastic, in particular an injection-molded part made of plastic and/or a shaped part made of a sintered material, and/or the permanent magnet means (10, 11) are arranged on a geometrical, preferably concentric annular orbit, which deviates from a concentric circular orbit, preferably an elliptic orbital (27, 28).