An outboard engine includes a steering mechanism having a pod propulsion device disposed in water outside a hull; a propulsive drive mechanism that is disposed in the hull and gives a propulsive drive force to the pod propulsion device; and a circulation cooling circuit which has an outward flow path that supplies a cooling oil to the steering mechanism and the propulsive drive mechanism, and an inward flow path which recovers the cooling oil from the steering mechanism and the propulsive drive mechanism, in which the inward flow path and the outward flow path of the circulation cooling circuit communicate with each other inside a case body of the pod propulsion device.

An outboard engine includes a steering mechanism having a pod propulsion device disposed in water outside a hull; a propulsive drive mechanism that is disposed in the hull and gives a propulsive drive force to the pod propulsion device; and a circulation cooling circuit which has an outward flow path that supplies a cooling oil to the steering mechanism and the propulsive drive mechanism, and an inward flow path which recovers the cooling oil from the steering mechanism and the propulsive drive mechanism, in which the inward flow path and the outward flow path of the circulation cooling circuit communicate with each other inside a case body of the pod propulsion device.

The outboard motor includes a drive shaft 4 that extends in a vertical direction, a propeller shaft that is connected to the drive shaft 4 to intersect the drive shaft 4, an upper case 2 that accommodates the drive source, a lower case 8 that accommodates the propeller shaft, and a height adjusting unit 9 that adjusts a height position between the upper case 2 and the lower case 8. The height adjusting unit 9 includes a first member 41 that is disposed coaxially with an axis C of the drive shaft 4, a second member 42 that is fixed to the lower case 8 and is screwed to the first screw portion 48, a rotation device 43 that rotates the first member 41, and a regulating portion 44 that restricts relative rotation between the first member 41 and the second member 42.

The outboard motor includes a drive shaft 4 that extends in a vertical direction, a propeller shaft that is connected to the drive shaft 4 to intersect the drive shaft 4, an upper case 2 that accommodates the drive source, a lower case 8 that accommodates the propeller shaft, and a height adjusting unit 9 that adjusts a height position between the upper case 2 and the lower case 8. The height adjusting unit 9 includes a first member 41 that is disposed coaxially with an axis C of the drive shaft 4, a second member 42 that is fixed to the lower case 8 and is screwed to the first screw portion 48, a rotation device 43 that rotates the first member 41, and a regulating portion 44 that restricts relative rotation between the first member 41 and the second member 42.

There is provided a ship propulsion machine including: a drive shaft; a drive gear fixed to the drive shaft; a front gear meshed with the drive gear; a rear gear meshed with the drive gear; a rear propeller provided on an inner propeller shaft; a front propeller provided on an outer propeller shaft; a casing having a gear chamber; a second bearing that supports a front end side of the outer propeller shaft at a rear portion of the casing; a third bearing that supports the inner propeller shaft and the outer propeller shaft in a manner rotatable with respect to each other. The third bearing is disposed on an inner peripheral side of a shaft portion of the rear gear, and the second bearing is disposed on an outer peripheral side of the shaft portion of the rear gear.

There is provided a ship propulsion machine including: a drive shaft; a drive gear fixed to the drive shaft; a front gear meshed with the drive gear; a rear gear meshed with the drive gear; a rear propeller provided on an inner propeller shaft; a front propeller provided on an outer propeller shaft; a casing having a gear chamber; a second bearing that supports a front end side of the outer propeller shaft at a rear portion of the casing; a third bearing that supports the inner propeller shaft and the outer propeller shaft in a manner rotatable with respect to each other. The third bearing is disposed on an inner peripheral side of a shaft portion of the rear gear, and the second bearing is disposed on an outer peripheral side of the shaft portion of the rear gear.

An outdrive for a marine vessel, such as a watercraft having an inboard engine, includes a standoff box configured to continuously provide power to the drive unit as the drive unit vertically moves from a raised mode to a lowered mode, thereby lowering a thrust point produced by a propeller, all while the watercraft is moving through water and while the propeller is producing thrust. The standoff box can include one or more idler gears that move via a system of brackets relative to an input gear and a transfer gear to maintain rotational engagement between the input gear and the transfer gear, which is joined with the drive unit to rotate the propeller. A related method also is provided.

An outdrive for a marine vessel, such as a watercraft having an inboard engine, includes a standoff box configured to continuously provide power to the drive unit as the drive unit vertically moves from a raised mode to a lowered mode, thereby lowering a thrust point produced by a propeller, all while the watercraft is moving through water and while the propeller is producing thrust. The standoff box can include one or more idler gears that move via a system of brackets relative to an input gear and a transfer gear to maintain rotational engagement between the input gear and the transfer gear, which is joined with the drive unit to rotate the propeller. A related method also is provided.

A self-generating device equipped in a mechanical system including a power generating part, an operating part, and a main shaft, the self-generating device comprising: the main shaft rotating according to a rotational force powered by the power generating part and transferring the rotational force to the operating part, wherein the operating part performs mechanical motion using the transferred rotational force; a rotor assembly combined with the main shaft and rotating along with the main shaft according to the rotational force, and a stator assembly surrounding the rotor assembly and staying stationary relative to the rotation of the rotor assembly, wherein magnetic field around the rotor assembly and the stator assembly changes according to the rotation of the main shaft, and the self-generating device generates induced electricity.

A self-generating device equipped in a mechanical system including a power generating part, an operating part, and a main shaft, the self-generating device comprising: the main shaft rotating according to a rotational force powered by the power generating part and transferring the rotational force to the operating part, wherein the operating part performs mechanical motion using the transferred rotational force; a rotor assembly combined with the main shaft and rotating along with the main shaft according to the rotational force, and a stator assembly surrounding the rotor assembly and staying stationary relative to the rotation of the rotor assembly, wherein magnetic field around the rotor assembly and the stator assembly changes according to the rotation of the main shaft, and the self-generating device generates induced electricity.