An engine device for an unmanned flying apparatus that provides good weight balance for the flying apparatus; cancels the gyroscopic effect; and has auto rotating propellers. The engine device includes a first cylinder and a second cylinder arranged horizontally and opposed to each other, and pistons within the cylinders advance and retract in opposite directions to each other; a first crankshaft and a second crankshaft arranged in the vertical direction, driven by the first cylinder and the second cylinder, respectively, and rotate in opposite directions; a first centrifugal clutch and a second centrifugal clutch rotate in opposite directions to each other; a final drive shaft transmitting rotational force to a gear mechanism comprising orthogonal transform gears, to rotate a propeller shaft; a one-way clutch arranged between the first crankshaft, the second crankshaft and the final drive shaft, and driven by both the first crankshaft and the second crankshaft.

An engine device for an unmanned flying apparatus that provides good weight balance for the flying apparatus; cancels the gyroscopic effect; and has auto rotating propellers.

The engine device includes a first cylinder and a second cylinder arranged horizontally and opposed to each other, and pistons within the cylinders advance and retract in opposite directions to each other; a first crankshaft and a second crankshaft arranged in the vertical direction, driven by the first cylinder and the second cylinder, respectively, and rotate in opposite directions; a first centrifugal clutch and a second centrifugal clutch rotate in opposite directions to each other; a final drive shaft transmitting rotational force to a gear mechanism comprising orthogonal transform gears, to rotate a propeller shaft; a one-way clutch arranged between the first crankshaft, the second crankshaft and the final drive shaft, and driven by both the first crankshaft and the second crankshaft.

A synchronizing clutch includes a synchronizing mechanism that can be displaced longitudinally in an axial direction along the longitudinal axis of the synchronizing clutch between a first and a second hub. The mechanism has a synchromesh sleeve with a first ratchet carrier and the synchromesh sleeve has a ratchet located on said carrier. In addition, the ratchet carrier is connected to the first hub in a longitudinally displaceable manner by means of helical toothing. At least one compression spring element is operatively arranged between the ratchet carrier and the first hub and runs parallel to the longitudinal axis of the synchronizing clutch.

A synchronizing clutch includes a synchronizing mechanism that can be displaced longitudinally in an axial direction along the longitudinal axis of the synchronizing clutch between a first and a second hub. The mechanism has a synchromesh sleeve with a first ratchet carrier and the synchromesh sleeve has a ratchet located on said carrier. In addition, the ratchet carrier is connected to the first hub in a longitudinally displaceable manner by means of helical toothing. At least one compression spring element is operatively arranged between the ratchet carrier and the first hub and runs parallel to the longitudinal axis of the synchronizing clutch.

The present invention provides, with reference to FIG. 1, a power train for an amphibian operable in land and marine modes. The power train comprises a prime mover having an integral speed change transmission, at least a first land propulsion unit, at least a first marine propulsion unit, and a power transmission unit. The prime mover is arranged to drive the at least first land propulsion unit through/via the integral speed change transmission in the land mode, and the prime mover is arranged to drive the at least first marine propulsion unit through/via the power transmission unit in both the marine mode and the land mode. The present invention also relates to an amphibian comprising such a powertrain.

Provided is a portable brush cutter with reduced weight and size due to its simple structure with a small number of components that is capable of improving durability and the like as well as effectively suppressing torsional vibration of a transmission shaft. In the portable brush cutter, a one-way clutch to prevent generation of torsional vibration in a rotation transmission path is interposed between an output shaft and a transmission shaft, and bearings are adjacently mounted on the opposite sides of the one-way clutch.

A selective torque transfer device is provided to transfer torque between one rotating component and a decoupled non-rotating component. The torque transfer device has an input shaft that extends along an axis and is connected to an input hub. The input shaft and input hub rotate about the axis on which they extend. A slider is disposed within the input hub and is capable of moving in a direction transverse to the axis. An output shaft extends along the axis and is connected to an output hub. The output shaft and output hub rotate about the axis on which they extend when the selective torque transfer device is in the engaged position. A link pivotally connects the output hub to the slider. The input hub is configured to rotate about its axis to create a torque.

A manual gearbox section for a vehicle includes a section input, a section output, a freewheel device situated in a freewheel torque path between the section input and the section output, and a clutch device situated in a clutch torque path between the section input and the section output. The clutch torque path forms a bypass path with respect to the freewheel device and/or the freewheel torque path. The freewheel device is in the form of a rotational-speed-dependent freewheel device. The freewheel device is in a freewheeling state at a first rotational speed and in a coupled state at a second rotational speed. The second rotational speed is higher than the first rotational speed.

A manual gearbox section for a vehicle includes a section input, a section output, a freewheel device situated in a freewheel torque path between the section input and the section output, and a clutch device situated in a clutch torque path between the section input and the section output. The clutch torque path forms a bypass path with respect to the freewheel device and/or the freewheel torque path. The freewheel device is in the form of a rotational-speed-dependent freewheel device. The freewheel device is in a freewheeling state at a first rotational speed and in a coupled state at a second rotational speed. The second rotational speed is higher than the first rotational speed.

A drive package includes a remote located CVT and a motor where the CVT is positioned rearward (or forward) of the motor. An auxiliary drive mechanism couples a drive shaft of the CVT to a crankshaft of the motor. The auxiliary drive mechanism is a belt or chain. The drive shaft is substantially parallel to, and longitudinally offset from, the crankshaft. Thus, the width of the drive package is reduced as compared to ATVs having a CVT located adjacent the motor. A method of making an ATV with the drive package is provided.