An overload clutch, for example a slip clutch, for the transmission of a torque limited in its strength, acting about a torque axis, from a driving part, for example a transmission of a drive shaft of a wind turbine, to an driven part situated, in particular, axially downstream, for example a drive train of a generator, having: at least one first body connected to either the driving part or the driven part in a torque-resistant manner, and at least one second body correspondingly connected to the other part in a torque-resistant manner, i.e. the driven part or the driving part, respectively, wherein the second body has a plurality of frictional elements biased against frictional counterparts on the first body along at least one biasing axis while forming a frictional engagement between the first body and the second body, wherein the frictional elements are supported in frictional element seats within the second body to be moveable, in particular displaceable, along the biasing axis.

Provided is an automatic transmission with a compact arrangement that prevents rotation of a hub member, and efficiently supplies lubrication hydraulic oil to the friction plates. The automatic transmission comprises a brake in which a plurality of friction plates are arranged between the hub member and a drum member, wherein a biasing member, an engagement hydraulic pressure chamber, and a disengagement hydraulic pressure chamber are arranged radially inward of the friction plates at positions radially overlapping each other. The hub member comprises: a first hub member comprising a cylindrical portion having a splined region with which the friction plates are spline-engaged, wherein the first hub member s spline-engaged with a transmission casing; and a second hub member formed with a part of a lubrication oil supply passage, wherein the second hub member is fittingly engaged with the transmission casing such that it is connected to a valve body.

A damper device includes a damper unit and a torque limiter unit. The damper unit includes first and second plates each including a plurality of window portions, a hub flange including a plurality of window holes, and a stopper mechanism. The first plate includes an engaging portion and a fixing portion fixed to the second plate. The engaging portion and the fixing portion are disposed radially outside the plurality of window portions. The hub flange includes a protrusion disposed circumferentially between and radially outside adjacent two of the plurality of window holes. The stopper mechanism is configured to be actuated by contact of the protrusion with the engaging portion. A fixation member, by which the first plate and the torque limiter unit are fixed, is disposed circumferentially between adjacent two of the plurality of window portions as seen in a direction along a rotational axis.

A torque limiter embedded damper device includes a torque limiter unit and a damper unit. The damper unit includes a first rotor, a second rotor, and a stopper mechanism. The second rotor includes a flange axially opposed to the first rotor. The stopper mechanism restricts an angle of relative rotation between the first rotor and the second rotor to a predetermined angular range. The stopper mechanism includes a cutout and a stop pin. The cutout is provided in the flange of the second rotor. The stop pin is fixed to the first rotor. The torque limiter unit includes a friction plate having an annular shape. The annular friction plate is fixed at an inner peripheral part thereof to an outer peripheral part of first rotor or the second rotor by a fixation member. The fixation member is fastened in a state of penetrating the cutout of the flange.

A power transmission device includes a flywheel and a damper device. The flywheel includes a plurality of fixation holes. The damper device includes an input rotary member, an output rotary member, and a pair of first elastic members. The input rotary member and output rotary member each include a plurality of assembling holes disposed in corresponding positions to the plurality of fixation holes of the flywheel. The plurality of assembling holes are arranged in a circumferential direction such that two pairs of the assembling holes, each pair including two adjacent assembling holes, are each disposed at a larger interval than remaining assembling holes to produce a pair of accommodation spaces. A pair of first accommodation portions, accommodating the pair of first elastic members, is disposed radially outside the pair of accommodation spaces.

A power tool includes a motor including a rotation shaft; an output shaft to which a cutting blade is attachable; a belt for transmitting a rotational force of the rotation shaft to the output shaft; an intermediate shaft positioned between the rotation shaft and the output shaft on a transmission path of the rotational force; a plurality of pulleys including a first pulley provided on the rotation shaft and rotatable integrally with the rotation shaft and a second pulley through which the intermediate shaft is inserted and having a diameter greater than that of the first pulley, the first pulley and the second pulley supporting the belt and being rotatable in accordance with rotation of the rotation shaft; and a transmission restricting part provided on a transmission path for transmitting rotation of the second pulley to the cutting blade and configured to interrupt or limit transmission of a rotational force.

Provided is a drive train of a wind turbine. The drive train includes a torque limiter assembly including a torque limiter. The torque limiter includes: a first clamping disk, a friction disk, a second clamping disk, and a preloading means. The clamping disks and the friction disk are configured such that the clamping disks frictionally transmit a torque to the friction disk. The torque limiter assembly further includes a torque shaft and a hub shaft. The torque shaft is connected to a rotor of the wind turbine, and the hub shaft is connected to a generator rotor of a generator. The friction disk is bolted to the hub shaft via interface bolts from a downwind side, such that the torque limiter is detachable from the hub shaft as a whole. Further provided is a wind turbine.

A damper device includes a first rotor disposed to be rotatable, a second rotor rotatable relative to the first rotor, and a plurality of elastic members configured to elastically couple the first rotor and the second rotor in a circumferential direction. The first rotor includes a first plate and a second plate. The first and second plates are axially opposed to each other, and fixed to be immovable in both axial and circumferential directions. The first plate includes a plurality of first holding portions and a plurality of bent portions. The plurality of first holding portions hold the plurality of elastic members. The plurality of bent portions are provided on an outer peripheral end of the first plate, and bent toward the second plate. The second plate includes a plurality of second holding portions holding the plurality of elastic members together with the plurality of first holding portions.

A flexplate for a motor vehicle drivetrain includes a carry plate configured for being connected to an engine crankshaft and a drive plate. The drive plate and the carry plate are separate components attached directly via contact. The drive plate is configured for transferring torque input into the carry plate to a downstream component. A method of constructing a flexplate for a motor vehicle drivetrain includes stamping a carry plate configured for being connected to an engine crankshaft; stamping a drive plate separate from the carry plate; and attaching the drive plate and the carry plate directly together via contact. The drive plate is configured for transferring torque input into the carry plate to a downstream component.

There is disclosed a torque transfer apparatus for a mineral drilling tool used in a downhole assembly of a drill string. The drilling tool has a downhole drill bit and one or more uphole drill bits spaced apart from the downhole drill bit, with the torque transfer apparatus being located between them. The apparatus has an axial bore therethrough for fluid flow and comprises first and second members being rotatably joined to each other. The apparatus rotationally couples and transfers torque between the first and second members when a torque difference between torque on the downhole drill bit and torque on the uphole drill bit is below a threshold torque value. The apparatus disengages the rotational coupling while the torque difference exceeds the threshold torque value. The flow rate of drilling fluid flowing through the axial bore is altered when the apparatus engages and disengages the coupling.