A gear unit includes a shaft, rotatably mounted via a first bearing, a housing part, and a cover connected to the housing part. The shaft has a threaded region onto which a nut is screwed, and a spacing sleeve and a disk are arranged between the nut and an inner ring of the spacing sleeve. The greatest outer diameter of the disk is greater than the greatest outer diameter of the spacing sleeve; the greatest radial distance of the disk relative to the rotational axis of the shaft is greater than the greatest radial distance of the spacing sleeve relative to the rotational axis of the shaft; and/or the radial spacing region covered by the disk and relative to the rotational axis of the shaft contains the radial spacing region covered by the spacing sleeve.

A gear unit includes a housing having a lower part and a cover part, e.g., fitted onto the lower part, and an output shaft and a driving shaft. The lower part includes a first support, a second support, a base plate, and side walls. Each side wall is connected, e.g., welded, the first and second supports. The first support is a closed annular structure, e.g., a closed ring. The second support is an open annular structure, e.g., an open ring. A first bearing, e.g., a double bearing, for rotatably supporting the output shaft is received in the base plate. A second bearing for rotatably supporting the output shaft is received in the bearing receiving part. The base plate is connected, e.g., welded, to the second support and to the bearing receiving part.

A fluid delivery system for supplying fluid to a machine assembly includes: a pump module; a drive for the pump module; and a housing which includes a reservoir for the fluid. The reservoir includes an aspiration point, and the pump module includes a first inlet, a second inlet, a first outlet and a second outlet. The first inlet is fluidically connected to the reservoir via a first suction conduit, and the first outlet is fluidically connected to the machine assembly via a first pressure conduit. The second inlet is fluidically connected to the housing via a second suction conduit, and the second outlet is fluidically connected to the reservoir via a second pressure conduit.

An oil supply system for supplying oil to a lubricating cavity of a gas turbine engine, the oil supply system has: a de-oiler having a de-oiler air-oil inlet, a de-oiler oil outlet hydraulically connected to the lubricating cavity, and a de-oiler air outlet in fluid flow communication with an environment outside of the oil supply system; and a closed-loop oil circuit including a main pump having a main pump inlet and a main pump outlet, the main pump outlet hydraulically connected to the lubricating cavity, a de-aerator having a de-aerator inlet hydraulically connected to a scavenge outlet of the lubricating cavity, a de-aerator air-oil outlet in fluid flow communication with the de-oiler inlet, and a de-aerator oil outlet hydraulically connected to the main pump inlet.

A twin transmission of a dual electric machine powertrain is presented. The twin transmission has a gear stage, a sump, a multi-chamber system adjacent to the gear stage, and a delay arrangement with a hydraulic flow restrictor. The multi-chamber system provides a flow path that continuously delivers a lubricant into the sump through the hydraulic flow restrictor.

A drive device rotating an axle of a vehicle includes: a motor having a rotor and a stator; a housing; a temperature sensor for detecting a temperature of the motor; and an oil passage supplying oil to the stator from above. The stator includes a stator core and a coil assembly having coils attached to the stator core. The coil assembly has a terminal portion located on one side of the motor axis in a predetermined direction orthogonal to both the axial direction and the vertical direction. The temperature sensor is in a portion of the coil assembly on one side in the predetermined direction with respect to the motor axis. The temperature sensor is on a lower side with respect to the terminal portion and an upper side with respect to an end on a lower side in the vertical direction with respect to the rotor.

A straddle vehicle includes: a prime mover; a hydraulically actuated main clutch disposed in a power transmission route between the prime mover and a drive wheel; an oil control valve unit that controls flow of a hydraulic oil supplied to the main clutch; and a power unit case including a case body and a cover removably mounted on the case body, the power unit case accommodating at least the main clutch. The oil control valve unit is secured to the case body.

In a power unit device of a vehicle in which a differential device is arranged on one side of an engine, warming-up of the engine is facilitated while heat convection from an oil pan to a differential housing is inhibited. The power unit device includes a heat insulating member that covers the outer side of an oil pan, and a differential housing that is fitted to and mounted on the oil pan. A fitting portion is provided in the differential housing, and a fitted portion is provided in the oil pan. A fitting face portion of one of the fitting portion and the fitted portion includes, at different positions in the circumferential direction, a plurality of recesses and projections in the radial direction, and is fitted to a fitting face portion of the other of the fitting portion and the fitted portion by the plurality of projections.

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.

Transmissions and methods therefor are disclosed herein. A transmission includes a housing, an input shaft, and a cooling unit. The input shaft extends outside of the housing and is configured to receive rotational power from a rotational power source. The cooling unit is supported by the input shaft. The cooling unit includes a heat exchanger.